DTC P1604: Startability Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read the DTCs and record the Freeze Frame Data.

   HINT: 

   • This freeze frame data shows the actual engine conditions when engine starting trouble occurred.
   • When confirming the freeze frame data, be sure to check all 5 data sets of freeze frame data.
   • The fourth set of freeze frame data is the data recorded when the DTC is stored.
   Fig 1: Identifying Freeze Frame Data

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   RESULT
   
   

   Result	Proceed to
   Only DTC P1604 is output	A
   DTCs other than P1604 are output	B

B → See step   117 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / All Data / Immobiliser Fuel Cut.
5. Read the value displayed on the Techstream.

   OK

   Immobiliser Fuel Cut is OFF

   HINT: 

   If the engine is cranked immediately after reconnecting the battery cable (key verification for immobiliser system not completed), the engine cannot be started. Key verification needs to wait for several seconds after turning the ignition switch on (IG).

   Result

   Result	Proceed to
   OK	A
   NG (w/ Smart Key System)	B
   NG (w/o Smart Key System)	C

B → See step   118 

C → See step   143 

A: Go to next step 

1. Confirm the problem symptoms.
   RESULT
   
   

   Result	Proceed to
   Freeze frame data exists, but the problem symptoms cannot be reproduced and the malfunction conditions are unknown	A
   The problem symptoms can be reproduced, or the malfunction conditions are known	B

B → See step   25 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored, refer to FREEZE FRAME DATA .

   Result

   Freeze Frame Data Item for DTC P1604		Suspected Area	Proceed to
   Engine Speed	Battery Voltage
   All 0 RPM (no engine cranking at all)	Minimum voltage is less than 5 V	Battery fully depleted	A
   	Minimum voltage is 5 V or higher	Starter malfunction Crankshaft position sensor system Excess engine friction Immobiliser system ECM	B
   100 to 250 RPM (engine cranks but no initial combustion)	-	Fuel pump control system Ignition system Engine coolant temperature sensor Immobiliser system Fuel injection system	C
   250 RPM or higher (combustion occurs but initial combustion and starter turnoff occur late)	-	Engine assembly Fuel injection system Fuel pump control system	D

   HINT: 

   When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame Data will be ON. If "Low Rev for Eng Start" is ON, proceed to E.

   *1: This value turns ON when the engine speed does not reach a certain value for a certain period of time when starting the engine.

   *2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the following freeze frame data items.

   • Immobiliser Fuel Cut
   • Engine Speed (Starter OFF)
   • Shift SW Status (R, D Range)

B → See step   5 

C → See step   10 

D → See step   15 

E → See step   51 

A → CHARGE OR REPLACE BATTERY 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored, refer to FREEZE FRAME DATA .

   Result

   Freeze Frame Data Item for DTC P1604	Result	Suspected Area	Proceed to
   Battery Voltage	Minimum voltage is 6 V or higher and voltage does not fluctuate*1	Starter system	A
   	Minimum voltage is 6 V or higher and voltage fluctuates*2, *3	Crankshaft position sensor system ECM	B
   	Minimum voltage is 5 to 6 V*4	Excess engine friction Battery fully depleted	C

   HINT: 

   • *1: The 5 sets of freeze frame data show approximately the same battery voltage.
     Fig 2: Identifying Freeze Frame Data

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • *2: The 5 sets of freeze frame data show different battery voltages.
   • *3: If the voltage fluctuates, it can be determined that cranking is being performed normally. When the engine speed is 0 RPM, the crankshaft position sensor system and/or the ECM may be malfunctioning.
   • *4: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

B → See step   6 

C → CHECK AND REPAIR ENGINE OR BATTERY 

A → See step   119 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

NG → See step   120 

OK: Go to next step 

1. Disconnect the crankshaft position sensor connector.
2. Check for oil on the connector terminals.

   OK

   No oil on the terminals.

NG → See step   121 

OK: Go to next step 

1. Disconnect the crankshaft position sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B21-1 - B51-6 (NE+)	Always	Below 1 Ω
   B21-2 - B51-5 (NE-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B21-1 or B51-6 (NE+) - Body ground	Always	10 kΩ or higher
   B21-2 or B51-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the crankshaft position sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   122 

OK → END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored, refer to FREEZE FRAME DATA .

   Result

   Freeze Frame Data Item for DTC P1604			Suspected Area	Proceed to
   Coolant Temp, Ambient Temp for A/C, Intake Air	Coolant Temp, Ambient Temp for A/C	Fuel Pump/Speed Status
   Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is 10°C (18°F) or more*1	Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temp for A/C by 15°C (27°F) or more	-	Engine coolant temperature sensor	A
   	Other than above	All 5 sets of freeze frame data are ON	-	B
   		At least 1 of the 5 sets of freeze frame data is OFF	Fuel pump control system	C
   Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is less than 10°C (18°F)*2	-	At least 1 of the 5 sets of freeze frame data is OFF	Fuel pump control system	C
   		All 5 sets of freeze frame data are ON	-	B

   HINT: 

   • *1: A long time had not elapsed after stopping the engine.
   • *2: A long time had elapsed after stopping the engine.

B → See step   11 

C → See step   124 

A → See step   123 

1. Connect the Techstream to the DLC3.
2. Disconnect the fuel pump connector.
3. Turn the ignition switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
6. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   O9-4 - Body ground	Active Test is being performed	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Pump)

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
7. Reconnect the fuel pump connector.

NG → See step   124 

OK: Go to next step 

1. Disconnect the fuel injector connector.
2. Turn the ignition switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B13-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B14-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B15-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B16-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B17-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B18-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the fuel injector connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY) 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B → See step   14 

A → REPAIR OR REPLACE FUEL LINE 

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
   RESULT
   
   

   Result	Proceed to
   There is foreign matter or signs that fuel pump was stuck	A
   There is no foreign matter and no signs that fuel pump was stuck	B

B → See step   24 

A → REPAIR OR REPLACE FUEL SYSTEM 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored, refer to FREEZE FRAME DATA .

   Result

   Freeze Frame Data Item for DTC P1604				Suspected Area	Proceed to
   Coolant Temp, Ambient Temp for A/C, Intake Air	Coolant Temp, Ambient Temp for A/C	Long FT	Engine Speed
   Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is 10°C (18°F) or more	Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temp for A/C by 15°C (27°F) or more	-	-	Engine coolant temperature sensor	A
   	Other than above	-15% or less, or +15% or more	-	Fuel pump control system Fuel injector assembly	B
   		-15 to +15%	Minimum speed is 300 RPM or more*	Engine assembly	C
   			Minimum speed is below 300 RPM	Fuel system Intake air system	D
   Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is less than 10°C (18°F)	-	-15% or less, or +15% or more	-	Fuel pump control system Fuel injector assembly	B
   		-15 to +15%	Minimum speed is 300 RPM or more*	Engine assembly	C
   			Minimum speed is below 300 RPM	Fuel system Intake air system	D

   HINT: 

   *: Compression loss may have occurred in the engine assembly.

B → See step   16 

C → CHECK AND REPAIR ENGINE ASSEMBLY 

D → See step   18 

A → See step   123 

1. Check that no carbon is stuck to the fuel injector assembly.

   OK

   No carbon present.

NG → See step   125 

OK: Go to next step 

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
   RESULT
   
   

   Result	Proceed to
   There is foreign matter or signs that fuel pump was stuck	A
   There is no foreign matter and no signs that fuel pump was stuck	B

B → See step   24 

A → REPAIR OR REPLACE FUEL SYSTEM 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored, refer to FREEZE FRAME DATA .

   Result

   Freeze Frame Data Item for DTC P1604	Result	Suspected Area	Proceed to
   Coolant Temp	Engine coolant temperature is 40°C (104°F) or less*1	Pressure regulator	A
   	Engine coolant temperature is 40 to 90°C (104 to 194°F)*2	Fuel injector assembly	B
   	Engine coolant temperature is 90°C (194°F) or more*3	Pressure regulator	A

   HINT: 

   *1: If the engine coolant temperature is 40°C (104°F) or less (after stopping the engine and the vehicle is not driven for a long period of time), the pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: If the engine coolant temperature is 40 to 90°C (104 to 194°F) (15 to 120 minutes have passed after stopping the engine), there may be fuel leaking from a fuel injector.

   *3: If the engine coolant temperature is 90°C (194°F) or more (2 to 5 minutes have passed after stopping the engine), there may be a problem with the pressure regulator failing to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

B → See step   20 

A: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures, refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

   Standard

   147 kPa (1.5 kgf/cm² , 21 psi) or higher (5 minutes after stopping the engine)

   HINT: 

   If the engine cannot be started, read the values after cranking the engine.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   24 

A → REPLACE PRESSURE REGULATOR 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

   Result

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B

   HINT: 

   If the concentration is 400 ppm or higher, a fuel injector may have a sealing problem.

B → See step   22 

A: Go to next step 

1. Inspect the fuel injectors, refer to INSPECTION .

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   22 

A → See step   125 

1. Check if carbon is in the air flow passage.

   Result

   Result	Proceed to
   Carbon in passage	A
   No carbon present	B

B → See step   23 

A → See step   126 

1. Check the intake system for vacuum leak.

   OK

   No leaks in intake system.

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Check if the engine can be started.

   Result

   Result	Proceed to
   Engine can be started	A
   Engine cannot be started	B

B → See step   25 

A → END 

1. Confirm the problem symptoms.

   HINT: 

   The problem symptoms below can be determined by reading the freeze frame data.

   Result

   Problem Symptom	Suspected Area	Proceed to
   The engine does not crank	Battery fully depleted Starter (includes pinion gear wear or teeth damage) Starter system Engine assembly (excess friction) Drive plate wear or teeth damage	A
   Abnormal cranking speed	Battery fully depleted Starter Engine assembly (excess friction, compression loss)	B
   There is no initial combustion (combustion does not occur even once)*1	Fuel pressure of pressure regulator maintained Fuel injector leak Fuel leak from fuel line Fuel pump control system Fuel pump Spark plug Crankshaft position sensor system Ignition coil system	C
   The engine stalls after starter turnoff (engine stalls immediately after the first time the engine speed increases)*2	Intake system connections Throttle body Camshaft timing oil control valve Mass air flow meter system	D
   The initial combustion and starter turnoff occur late*3	Engine coolant temperature sensor Mass air flow meter Air fuel ratio sensor Heated oxygen sensor Fuel injector Spark plug Pressure regulator Fuel pump Fuel pump control system	E

   HINT: 

   • If there is hesitation (cranking speed is slow and combustion occurs before passing TDC) during the initial cranking period, the battery charge may be insufficient or the starter may be malfunctioning.
   • *1: If there is no initial combustion, a wire harness may be malfunctioning, or the ignition or fuel system may be malfunctioning.
   • *2: If the engine stalls after starter turnoff, the air-fuel ratio may be incorrect or the camshaft timing oil control valve may have a problem returning.
   • *3: If the initial combustion and starter turnoff occur late, the fuel injection volume may be incorrect (too low or too high).

B → See step   32 

C → See step   35 

D → See step   51 

E → See step   58 

A: Go to next step 

1. When cranking the engine, check for a noise indicating that the starter pinion gear is extending, and check that the starter pinion gear is not spinning freely.

   Result

   Problem Symptom	Suspected Area	Proceed to
   A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is not spinning freely*	Battery Excess engine friction Starter	A
   A noise indicating that the starter pinion gear is extending is heard but the starter pinion gear is spinning freely	Drive plate Starter	B
   A noise indicating that the starter pinion gear is extending is not heard	Battery Starter Starter system	C

   HINT: 

   *: The battery may be fully depleted or there may be excess engine friction.

B → See step   29 

C → See step   30 

A: Go to next step 

1. Check the electrolyte quantity.
   Fig 4: Checking Battery Voltage & Electrolyte Quantity

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard

   Electrolyte quantity is within the specified range.

2. Inspect the specific gravity.
   1. Inspect the specific gravity of each cell.

      Standard specific gravity

      1.25 to 1.29 (electrolyte is at 20°C (68°F)

      HINT: 

      • If the result is not as specified, recharge or replace the battery.
      • It is not necessary to inspect a maintenance-free battery.
3. Inspect the battery voltage.
   1. Turn the ignition switch off and turn on (IG) the headlights for 20 to 30 seconds. This will remove the surface charge from the battery.
   2. Measure the battery voltage.

      Standard voltage

      12.5 to 12.9 V (electrolyte is at 20°C (68°F)

      HINT: 

      If the result is not as specified, recharge or replace the battery.

   3. Measure the battery voltage when cranking the engine.

      Standard

      Approximately 6 V or higher (0°C (32°F) or higher)

      HINT: 

      When the battery is depleted, the horn becomes quieter.

NG → CHARGE OR REPLACE BATTERY 

OK: Go to next step 

1. Check that the crankshaft rotates smoothly when rotating it by hand.

   OK

   Crankshaft rotates smoothly.

   HINT: 

   Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → INSPECT STARTER ASSEMBLY 

1. Remove the starter assembly, refer to REMOVAL .
2. Check for starter pinion gear wear and damage.

   Standard

   There is no wear or damage.

3. Install the starter assembly.

NG → See step   128 

OK → See step   127 

1. Check the electrolyte quantity.
   Fig 5: Checking Battery Voltage & Electrolyte Quantity

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard

   Electrolyte quantity is within the specified range.

2. Inspect the specific gravity.
   1. Inspect the specific gravity of each cell.

      Standard specific gravity

      1.25 to 1.29 (electrolyte is at 20°C (68°F)

      HINT: 

      • If the result is not as specified, recharge or replace the battery.
      • It is not necessary to inspect a maintenance-free battery.
3. Inspect the battery voltage.
   1. Turn the ignition switch off and turn on (IG) the headlights for 20 to 30 seconds. This will remove the surface charge from the battery.
   2. Measure the battery voltage.

      Standard voltage

      12.5 to 12.9 V (electrolyte is at 20°C (68°F)

      HINT: 

      If the result is not as specified, recharge or replace the battery.

   3. Measure the battery voltage when cranking the engine.

      Standard

      Approximately 6 V or higher (0°C (32°F) or higher)

      HINT: 

      When the battery is depleted, the horn becomes quieter.

NG → CHARGE OR REPLACE BATTERY 

OK: Go to next step 

1. Inspect the starter assembly, refer to INSPECTION .

   Result

   Problem Symptom	Proceed to
   OK	A
   NG	B

B → See step   128 

A → See step   119 

1. Check the cranking speed.

   Result

   Problem Symptom	Suspected Area	Proceed to
   Cranking speed is slow (100 RPM or less)	Battery Starter assembly Excess engine friction	A
   Cranking speed is fast (300 RPM or more)*	Engine compression loss	B

   HINT: 

   *: If the cranking speed is fast, there may be compression loss.

B → CHECK AND REPAIR ENGINE ASSEMBLY 

A: Go to next step 

1. Check the electrolyte quantity.
   Fig 6: Checking Battery Voltage & Electrolyte Quantity

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard

   Electrolyte quantity is within the specified range.

2. Inspect the specific gravity.
   1. Inspect the specific gravity of each cell.

      Standard specific gravity

      1.25 to 1.29 (electrolyte is at 20°C (68°F)

      HINT: 

      • If the result is not as specified, recharge or replace the battery.
      • It is not necessary to inspect a maintenance-free battery.
3. Inspect the battery voltage.
   1. Turn the ignition switch off and turn on (IG) the headlights for 20 to 30 seconds. This will remove the surface charge from the battery.
   2. Measure the battery voltage.

      Standard voltage

      12.5 to 12.9 V (electrolyte is at 20°C (68°F)

      HINT: 

      If the result is not as specified, recharge or replace the battery.

   3. Measure the battery voltage when cranking the engine.

      Standard

      Approximately 6 V or higher (0°C (32°F) or higher)

      HINT: 

      When the battery is depleted, the horn becomes quieter.

NG → CHARGE OR REPLACE BATTERY 

OK: Go to next step 

1. Check that the crankshaft rotates smoothly when rotating it by hand.

   OK

   Crankshaft rotates smoothly.

   HINT: 

   Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → INSPECT STARTER ASSEMBLY 

1. Using a sound scope or screwdriver, check for an fuel injector assembly operating noise while cranking the engine.

   OK

   Fuel injector assembly operating noise is heard.

NG → See step   48 

OK: Go to next step 

1. Inspect the fuel pressure, refer to ON-VEHICLE INSPECTION - Step 2 .

NG → See step   46 

OK: Go to next step 

1. Check for sparks, refer to ON-VEHICLE INSPECTION .

NG → See step   41 

OK: Go to next step 

1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.

   Result

   Problem Symptom	Suspected Area	Proceed to
   When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Pressure regulator is stuck open	A
   When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector leak	B
   When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by pressure regulator	A
   Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

   HINT: 

   *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: Fuel may be leaking from a fuel injector assembly.

   *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *4: From step 72, perform fuel system troubleshooting C (steps 73 to 77).

B → See step   40 

C → See step   72 

A: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures, refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

   Result

   Result	Proceed to
   Less than 147 kPa (1.5 kgf/cm2 ) (5 minutes after stopping the engine)	A
   147 kPa (1.5 kgf/cm2 ) or higher (5 minutes after stopping the engine)	B*

   HINT: 

   • If the engine cannot be started, check the fuel pressure after cranking the engine.
   • *: From step 72, perform fuel system troubleshooting C (steps 73 to 77).

B → See step   72 

A → REPLACE PRESSURE REGULATOR 

1. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

   Result

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B*

   HINT: 

   • If the concentration is 400 ppm or higher, a fuel injector may have a sealing problem.
   • *: From step 72, perform fuel system troubleshooting C (steps 73 to 77).

B → See step   72 

A → See step   125 

1. Inspect the spark plugs, refer to ON-VEHICLE INSPECTION - Step 2 .

   HINT: 

   Even if the spark plug of only one cylinder is malfunctioning, replace the spark plugs of all cylinders.

NG → See step   129 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
5. Start the engine.
6. While running the engine, read the Engine Speed value.

   Standard

   A value that matches the actual engine speed is constantly output.

   HINT: 

   • Check the engine speed using a line graph.
   • If the engine cannot be started, check the engine speed while cranking the engine.
   • If the engine speed is 0 RPM, the crankshaft position sensor may have an open or short circuit.

NG → See step   130 

OK: Go to next step 

1. Disconnect the ignition coil connector.
2. Turn the ignition switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B30-1 (+B) - B30-4 (GND)	Ignition switch on (IG)	11 to 14 V
   B31-1 (+B) - B31-4 (GND)	Ignition switch on (IG)	11 to 14 V
   B32-1 (+B) - B32-4 (GND)	Ignition switch on (IG)	11 to 14 V
   B33-1 (+B) - B33-4 (GND)	Ignition switch on (IG)	11 to 14 V
   B34-1 (+B) - B34-4 (GND)	Ignition switch on (IG)	11 to 14 V
   B35-1 (+B) - B35-4 (GND)	Ignition switch on (IG)	11 to 14 V

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ignition coil connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - IG2 RELAY) 

OK: Go to next step 

1. Disconnect the ignition coil connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B30-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B31-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B32-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B33-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B34-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B35-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B30-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B31-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B32-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B33-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B34-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B35-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the ignition coil connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the ignition coil connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B30-3 (IGT1) - B49-24 (IGT1)	Always	Below 1 Ω
   B31-3 (IGT2) - B49-25 (IGT2)	Always	Below 1 Ω
   B32-3 (IGT3) - B49-26 (IGT3)	Always	Below 1 Ω
   B33-3 (IGT4) - B49-27 (IGT4)	Always	Below 1 Ω
   B34-3 (IGT5) - B49-28 (IGT5)	Always	Below 1 Ω
   B35-3 (IGT6) - B50-25 (IGT6)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B30-3 (IGT1) or B49-24 (IGT1) - Body ground	Always	10 kΩ or higher
   B31-3 (IGT2) or B49-25 (IGT2) - Body ground	Always	10 kΩ or higher
   B32-3 (IGT3) or B49-26 (IGT3) - Body ground	Always	10 kΩ or higher
   B33-3 (IGT4) or B49-27 (IGT4) - Body ground	Always	10 kΩ or higher
   B34-3 (IGT5) or B49-28 (IGT5) - Body ground	Always	10 kΩ or higher
   B35-3 (IGT6) or B50-25 (IGT6) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness is normal, after replacing the ignition coil, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform troubleshooting for the ignition system (steps 78 to 84).
4. Reconnect the ECM connector.
5. Reconnect the ignition coil connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   131 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
5. When performing the Active Test, check for an operating sound from the fuel pump.

   Standard

   Techstream Operation	Specified Condition
   ON	Operating sound heard
   OFF	Operating sound not heard

   HINT: 

   Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

NG → See step   124 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
   • If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform fuel system troubleshooting (steps 73 to 77).

B → See step   124 

A → REPAIR OR REPLACE FUEL LINE 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
5. Start the engine.
6. While running the engine, read the Engine Speed value.

   Standard

   A value that matches the actual engine speed is constantly output.

   HINT: 

   • Check the engine speed using a line graph.
   • If the engine cannot be started, check the engine speed while cranking the engine.
   • If the engine speed is 0 RPM, the crankshaft position sensor may have an open or short circuit.

NG → See step   121 

OK: Go to next step 

1. Disconnect the fuel injector assembly connector.
2. Turn the ignition switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B13-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B14-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B15-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B16-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B17-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V
   B18-2 - Boyd ground	Ignition switch on (IG)	11 to 14 V

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the fuel injector assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY) 

OK: Go to next step 

1. Disconnect the fuel injector assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B13-1 - B48-6 (#10)	Always	Below 1 Ω
   B14-1 - B48-1 (#20)	Always	Below 1 Ω
   B15-1 - B48-7 (#30)	Always	Below 1 Ω
   B16-1 - B48-2 (#40)	Always	Below 1 Ω
   B17-1 - B48-8 (#50)	Always	Below 1 Ω
   B18-1 - B48-3 (#60)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B13-1 or B48-6 (#10) - Body ground	Always	10 kΩ or higher
   B14-1 or B48-1 (#20) - Body ground	Always	10 kΩ or higher
   B15-1 or B48-7 (#30) - Body ground	Always	10 kΩ or higher
   B16-1 or B48-2 (#40) - Body ground	Always	10 kΩ or higher
   B17-1 or B48-8 (#50) - Body ground	Always	10 kΩ or higher
   B18-1 or B48-3 (#60) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the fuel injector assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   122 

1. Inspect the mass air flow meter, refer to ON-VEHICLE INSPECTION .

NG → See step   57 

OK: Go to next step 

1. Check for air suction in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.].

   HINT: 

   • If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake manifold increases and the air suction noise becomes louder.
   • If Short FT and Long FT are largely different from the normal values when idling (intake air volume is small) and almost the same as the normal values when racing the engine (intake air volume is high), air leakage may be present.

   Standard

   There is no air suction.

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Disconnect the throttle body connector.

   HINT: 

   When the connector is disconnected, the vehicle enters fail-safe mode and the throttle valve opening angle is 4 to 6°.

2. Crank the engine and check that it starts.

   Result

   Result	Proceed to
   Engine starts	A
   Engine does not start	B

3. Connect the throttle body connector.

   HINT: 

   When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs, refer to DTC CHECK / CLEAR .

B → See step   55 

A: Go to next step 

1. Check if carbon is in the air flow passage.

   Standard

   No carbon present.

NG → REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY 

OK: Go to next step 

Fig 7: Identifying Engine Speed In Relation to Oil Control Valve (OCV) On/Off Position

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Warm up the engine.
5. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).

   HINT: 

   When performing the Active Test, make sure the A/C is on and the shift lever is in P or N.

6. Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.

   OK

   Techstream Operation	Specified Condition
   OFF	Normal engine speed
   ON	Soon after OCV switched from OFF to ON, engine idles roughly or stalls

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
   • If the camshaft timing oil control valve assembly is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause the engine to stall.

NG → See step   132 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Start the engine and warm it up.
5. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).
6. Check the engine speed while operating the oil control valve using the Techstream.

   OK*

   Techstream Operation	Specified Condition
   0%	Normal engine speed
   100%	Engine idles roughly or stalls

   Result

   Result	Proceed to
   NG	A
   OK	B

   HINT: 

   • *: From step 72, perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95).
   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
   • If the camshaft timing oil control valve assembly is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause the engine to stall.

B → See step   72 

A → See step   133 

1. Disconnect the mass air flow meter connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B10-5 (VG) - B50-14 (VG)	Always	Below 1 Ω
   B10-4 (E2G) - B50-13 (E2G)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B10-5 (VG) or B50-14 (VG) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness is normal, after replacing the mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95).
4. Reconnect the ECM connector.
5. Reconnect the mass air flow meter connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   134 

1. Inspect the engine coolant temperature sensor, refer to INSPECTION .

   HINT: 

   If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

NG → See step   123 

OK: Go to next step 

1. Disconnect the engine coolant temperature sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B11-2 - B49-17 (THW)	Always	Below 1 Ω
   B11-1 - B50-7 (ETHW)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B11-2 or B49-17 (THW) - Body ground	Always	10 kΩ or higher
   B11-1 or B50-7 (ETHW) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.
4. Reconnect the ECM connector.
5. Reconnect the engine coolant temperature sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the mass air flow meter, refer to ON-VEHICLE INSPECTION .

   HINT: 

   If the mass air flow meter is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

NG → See step   134 

OK: Go to next step 

1. Disconnect the mass air flow meter connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B10-1 (THA) - B50-15 (THA)	Always	Below 1 Ω
   B10-2 (E2) - B50-7 (ETHA)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B10-1 (THA) or B50-15 (THA) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.
4. Reconnect the ECM connector.
5. Reconnect the mass air flow meter connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Atmosphere Pressure and Long FT #1, #2.
5. Read the value.

   Result

   Data List Item	Result	Suspected Area	Proceed to
   Long FT #1, #2	+25% or more or less than -25%	Air fuel ratio sensor Heated oxygen sensor Mass air flow meter Fuel injector assembly ECM	A
   Atmosphere Pressure	80 kPa (600 mmHg) or less (when altitude is 0 m)
   Both Data List items listed above	Values are other than above	-	B

B → See step   66 

A: Go to next step 

1. Remove the EFI No. 1 and ETCS fuses from the engine room relay block.
2. After 60 seconds or more elapse, install the EFI No. 1 and ETCS fuses.
3. Check if the engine can be started.
   RESULT
   
   

   Result	Proceed to
   Engine can be started	A
   Engine cannot be started	B

B → See step   66 

A: Go to next step 

Fig 8: Inspecting Air Fuel Ratio Sensor And Heated Oxygen Sensor Output Voltage

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Fuel System Status #1 and Fuel System Status #2.
5. Confirm that Fuel System Status #1 and Fuel System Status #2 are both CL.
6. Enter the following menus: Powertrain / Engine / Data List / AF Lambda B1S1 and AF Lambda B2S1.
7. Confirm that AF Lambda B1S1 and AF Lambda B2S1 are both within the range of 0.95 to 1.05 when idling.
8. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
9. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

   Standard

   Techstream Display	Injection Volume	Specified Condition
   AFS Voltage B1S1 AFS Voltage B2S1	+25%	Air fuel ratio sensor output voltage is below 3.1 V
   	-12.5%	Air fuel ratio sensor output voltage is higher than 3.4 V

   HINT: 

   • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
   • If the air fuel ratio sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

NG → See step   135 

OK: Go to next step 

1. Check if the idling speed is stable after starting the engine.

   OK

   Idling speed is stable.

   HINT: 

   After replacing the fuel injector assembly or mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

NG → See step   125 

OK → See step   134 

1. Inspect the fuel pressure, refer to ON-VEHICLE INSPECTION .

NG → See step   71 

OK: Go to next step 

1. Inspect the spark plugs, refer to ON-VEHICLE INSPECTION - Step 2 .
   RESULT
   
   

   Result	Proceed to
   All cylinders are normal	A
   One cylinder is abnormal*1	B
   All cylinders are abnormal*2, *3	C

   HINT: 

   • *1: If one cylinder is abnormal, replace the spark plug of that cylinder and inspect the ignition and fuel system for that cylinder. After performing repairs, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.
   • *2: If all cylinders are abnormal, replace the spark plugs of all cylinders and check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.
   • *3: Engine starting trouble may occur if the vehicle is driven extremely short distances repeatedly.

B → See step   136 

C → See step   137 

A: Go to next step 

1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.

   Result

   Problem Symptom	Suspected Area	Proceed to
   When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Pressure regulator is stuck open	A
   When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector leak	B
   When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by pressure regulator	A
   Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

   HINT: 

   *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: Fuel may be leaking from a fuel injector assembly.

   *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *4: From step 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

B → See step   70 

C → See step   72 

A: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures, refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

   Result

   Result	Proceed to
   Less than 147 kPa (1.5 kgf/cm2 ) (5 minutes after stopping the engine)	A
   147 kPa (1.5 kgf/cm2 ) or higher (5 minutes after stopping the engine)	B*

   HINT: 

   • If the engine cannot be started, check the fuel pressure after cranking the engine.
   • *: From step 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

B → See step   72 

A → REPLACE PRESSURE REGULATOR 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

   Result

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B*

   HINT: 

   • If the concentration is 400 ppm or higher, a fuel injector may have a sealing problem.
   • *: From step 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

B → See step   72 

A → See step   125 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
   • If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

B → See step   124 

A → REPAIR OR REPLACE FUEL LINE 

1. If the malfunction could not be identified during the inspection in steps 38, 39, 40 and 47, perform fuel system troubleshooting C (steps 73 to 77).

   Result

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Steps 38, 39, 40 and 47	Fuel system troubleshooting C	73 to 77	A

2. If the malfunction could not be identified during the inspection in step 45, perform ignition system troubleshooting (steps 78 to 84).

   Result

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Step 45	Ignition system troubleshooting	78 to 84	B

3. If the malfunction could not be identified during the inspection in steps 55, 56 and 57, perform intake air system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95).

   Result

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Step 55, 56, 57	Intake air system troubleshooting	85 to 87	C
   	Fuel system troubleshooting A	88 to 95

4. If the malfunction could not be identified during the inspection in steps 58, 59, 60, 61, 64, 65, 67, 68, 69, 70 and 71, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake air system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order.

   Result

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Steps 58, 59, 60, 61, 64, 65, 67, 68, 69, 70 and 71	Fuel system troubleshooting A	96 to 103	D
   	Fuel system troubleshooting B	104 to 106
   	Intake air system troubleshooting	107 to 109
   	Ignition system troubleshooting	110 to 116

B → See step   78 

C → See step   85 

D → See step   96 

A: Go to next step 

1. Inspect the fuel injectors assembly, refer to INSPECTION .

NG → See step   125 

OK: Go to next step 

1. Disconnect the fuel injector assembly connector.
2. Turn the ignition switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B13-2 - Body ground	Ignition switch on (IG)	11 to 14 V
   B14-2 - Body ground	Ignition switch on (IG)	11 to 14 V
   B15-2 - Body ground	Ignition switch on (IG)	11 to 14 V
   B16-2 - Body ground	Ignition switch on (IG)	11 to 14 V
   B17-2 - Body ground	Ignition switch on (IG)	11 to 14 V
   B18-2 - Body ground	Ignition switch on (IG)	11 to 14 V

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the fuel injector assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY) 

OK: Go to next step 

1. Disconnect the fuel injector assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B13-1 - B48-6 (#10)	Always	Below 1 Ω
   B14-1 - B48-1 (#20)	Always	Below 1 Ω
   B15-1 - B48-7 (#30)	Always	Below 1 Ω
   B16-1 - B48-2 (#40)	Always	Below 1 Ω
   B17-1 - B48-8 (#50)	Always	Below 1 Ω
   B18-1 - B48-3 (#60)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B13-1 or B48-6 (#10) - Body ground	Always	10 kΩ or higher
   B14-1 or B48-1 (#20) - Body ground	Always	10 kΩ or higher
   B15-1 or B48-7 (#30) - Body ground	Always	10 kΩ or higher
   B16-1 or B48-2 (#40) - Body ground	Always	10 kΩ or higher
   B17-1 or B48-8 (#50) - Body ground	Always	10 kΩ or higher
   B18-1 or B48-3 (#60) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the fuel injector assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   77 

OK → END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE) 

1. Replace the VVT sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   122 

OK → END (VVT SENSOR WAS DEFECTIVE) 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   138 

OK: Go to next step 

1. Check the tightening and installation condition of the VVT sensor bolt.
2. Check the connection of the VVT sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   139 

OK: Go to next step 

1. Disconnect the crankshaft position sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B21-1 - B51-6 (NE+)	Always	Below 1 Ω
   B21-2 - B51-5 (NE-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B21-1 or B51-6 (NE+) - Body ground	Always	10 kΩ or higher
   B21-2 or B51-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the crankshaft position sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the VVT sensor for intake side connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B22-1 (VVR+) - B51-9 (VV1+)	Always	Below 1 Ω
   B22-2 (VVR-) - B51-10 (VV1-)	Always	Below 1 Ω

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B23-1 (VVL+) - B51-12 (VV2+)	Always	Below 1 Ω
   B23-2 (VVL-) - B51-11 (VV2-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B22-1 (VVR+) or B51-9 (VV1+) - Body ground	Always	10 kΩ or higher
   B22-2 (VVR-) or B51-10 (VV1-) - Body ground	Always	10 kΩ or higher

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B23-1 (VVL+) or B51-12 (VV2+) - Body ground	Always	10 kΩ or higher
   B23-2 (VVL-) or B51-11 (VV2-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunction that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the VVT sensor for intake side connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the VVT sensor for exhaust side connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B43-1 (EX+) - B51-13 (EV1+)	Always	Below 1 Ω
   B43-2 (EX-) - B51-14 (EV1-)	Always	Below 1 Ω

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B42-1 (EX+) - B51-18 (EV2+)	Always	Below 1 Ω
   B42-2 (EX-) - B51-17 (EV2-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B43-1 (EX+) or B51-13 (EV1+) - Body ground	Always	10 kΩ or higher
   B43-2 (EX-) or B51-14 (EV1-) - Body ground	Always	10 kΩ or higher

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B42-1 (EX+) or B51-18 (EV2+) - Body ground	Always	10 kΩ or higher
   B42-2 (EX-) or B51-17 (EV2-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunction that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the VVT sensor for exhaust side connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   84 

OK → END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE) 

1. Replace the VVT sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   122 

OK → END (VVT SENSOR WAS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value.
5. Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches off.

   Result

   Data List Item	Result	Suspected Area	Proceed to
   ISC Learning Value	(Engine displacement (liters) x 0.9) or more	Valve timing Compression	A
   	Less than (engine displacement (liters) x 0.9)	-	B

B → See step   87 

A: Go to next step 

1. Inspect the compression, refer to ON-VEHICLE INSPECTION - Step 9 .

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → CHECK VALVE TIMING 

1. Inspect the engine coolant temperature sensor, refer to INSPECTION .

NG → See step   123 

OK: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures, refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine.

   Result

   Vehicle State	Specified Condition
   Cranking engine	304 to 343 kPa (3.1 to 3.5 kgf/cm2 )
   5 minutes after stopping engine	147 kPa (1.5 kgf/cm2 ) or more

NG → See step   94 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Long FT #1 and Long FT #2.

   Result

   Data List Item	Result	Suspected Area	Proceed to
   Long FT #1 and Long FT #2	-15 to +15%	Wire harness or connector Fuel	A
   	+15% or more, or less than -15%	Fuel injector for port injection	B

B → See step   125 

A: Go to next step 

1. Check if the idling speed after starting the engine is currently stable and has always been stable in the past.

   Result

   Problem Symptom	Suspected Area	Proceed to
   Current unstable idling speed or history of unstable idling speed	Crankshaft position sensor system	A
   All current and past idling speeds are stable	Fuel	B

   HINT: 

   Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

B → REPLACE FUEL 

A: Go to next step 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   138 

OK: Go to next step 

1. Disconnect the crankshaft position sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B21-1 - B51-6 (NE+)	Always	Below 1 Ω
   B21-2 - B51-5 (NE-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B21-1 or B51-6 (NE+) - Body ground	Always	10 kΩ or higher
   B21-2 or B51-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the crankshaft position sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   122 

OK → END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Using the Techstream, select the [Control the Fuel Pump / Speed] Active Test.
4. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B → See step   95 

A → REPAIR OR REPLACE FUEL LINE 

1. Disconnect the fuel pump connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 9: Identifying Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 - 5	20°C (68°F)	0.2 to 3.0 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Pump)

   HINT: 

   • Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
   • Make sure the internal connector is securely connected.
   • Make sure the fuel pump filter is not clogged.
3. Reconnect the fuel pump connector.

NG → See step   140 

OK → REPLACE PRESSURE REGULATOR 

HINT: 

For the fuel pressure inspection, refer to the following procedures, refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

   Result

   Result	Proceed to
   147 kPa (1.5 kgf/cm2 ) or higher (5 minutes after stopping the engine)	A
   Less than 147 kPa (1.5 kgf/cm2 ) (5 minutes after stopping the engine)	B

B → See step   102 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Long FT #1 and Long FT #2.

   Result

   Data List Item	Result	Suspected Area	Proceed to
   Long FT #1 and Long FT #2	-15 to +15%	Wire harness or connector Fuel	A
   	+15% or more, or less than -15%	Fuel injector assembly	B

B → See step   125 

A: Go to next step 

1. Check if the idling speed after starting the engine is currently stable and has always been stable in the past.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   Current unstable idling speed or history of unstable idling speed	Crankshaft position sensor system	A
   All current and past idling speeds are stable	Fuel	B

   HINT: 

   Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

B → REPLACE FUEL 

A: Go to next step 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   138 

OK: Go to next step 

1. Disconnect the crankshaft position sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B21-1 - B51-6 (NE+)	Always	Below 1 Ω
   B21-2 - B51-5 (NE-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B21-1 or B51-6 (NE+) - Body ground	Always	10 kΩ or higher
   B21-2 or B51-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the crankshaft position sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   122 

OK → END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B → See step   103 

A → REPAIR OR REPLACE FUEL LINE 

1. Disconnect the fuel pump connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 10: Identifying Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 - 5	20°C (68°F)	0.2 to 3.0 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Pump)

   HINT: 

   • Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
   • Make sure the internal connector is securely connected.
   • Make sure the fuel pump filter is not clogged.
3. Reconnect the fuel pump connector.

NG → See step   140 

OK: Go to next step 

1. Disconnect the vacuum hose (on the canister side) of the purge VSV.
   Fig 11: Identifying Canister Purge VSV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Start the engine.
3. Idle the engine.
4. Disconnect the purge VSV connector.
5. Check if air flows through the purge VSV.

   Standard

   Air does not flow

6. Reconnect the purge VSV connector.
7. Reconnect the vacuum hose.

   HINT: 

   When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs, refer to DTC CHECK / CLEAR .

NG → See step   141 

OK: Go to next step 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

   Result

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B

   HINT: 

   If the concentration is 400 ppm or higher, a fuel injector may have a sealing problem.

B → See step   106 

A → See step   125 

1. Check if carbon is on the intake valves.

   Result

   Result	Proceed to
   Carbon present	A
   No carbon present	B

B → See step   107 

A → CLEAN INTAKE VALVE 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value.
5. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

   Result

   Data List Item	Result	Suspected Area	Proceed to
   ISC Learning Value	(engine displacement (liters) x 0.9) or more	Valve timing Compression	A
   	Less than (engine displacement (liters) x 0.9)	-	B

B → See step   109 

A: Go to next step 

1. Inspect the compression, refer to ON-VEHICLE INSPECTION - Step 9 .

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → See step   142 

1. Inspect the engine coolant temperature sensor, refer to INSPECTION .

NG → See step   123 

OK: Go to next step 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   138 

OK: Go to next step 

1. Check the tightening and installation condition of the VVT sensor bolt.
2. Check the connection of the VVT sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   139 

OK: Go to next step 

1. Disconnect the crankshaft position sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B21-1 - B51-6 (NE+)	Always	Below 1 Ω
   B21-2 - B51-5 (NE-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B21-1 or B51-6 (NE+) - Body ground	Always	10 kΩ or higher
   B21-2 or B51-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the crankshaft position sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the VVT sensor for intake side connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B22-1 (VVR+) - B51-9 (VV1+)	Always	Below 1 Ω
   B22-2 (VVR-) - B51-10 (VV1-)	Always	Below 1 Ω

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B23-1 (VVL+) - B51-12 (VV2+)	Always	Below 1 Ω
   B23-2 (VVL-) - B51-11 (VV2-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B22-1 (VVR+) or B51-9 (VV1+) - Body ground	Always	10 kΩ or higher
   B22-2 (VVR-) or B51-10 (VV1-) - Body ground	Always	10 kΩ or higher

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B23-1 (VVL+) or B51-12 (VV2+) - Body ground	Always	10 kΩ or higher
   B23-2 (VVL-) or B51-11 (VV2-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunction that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the VVT sensor for intake side connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the VVT sensor for exhaust side connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B43-1 (EX+) - B51-13 (EV1+)	Always	Below 1 Ω
   B43-2 (EX-) - B51-14 (EV1-)	Always	Below 1 Ω

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B42-1 (EX+) - B51-18 (EV2+)	Always	Below 1 Ω
   B42-2 (EX-) - B51-17 (EV2-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B43-1 (EX+) or B51-13 (EV1+) - Body ground	Always	10 kΩ or higher
   B43-2 (EX-) or B51-14 (EV1-) - Body ground	Always	10 kΩ or higher

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B42-1 (EX+) or B51-18 (EV2+) - Body ground	Always	10 kΩ or higher
   B42-2 (EX-) or B51-17 (EV2-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunction that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
4. Reconnect the ECM connector.
5. Reconnect the VVT sensor for exhaust side connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   116 

OK → END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE) 

1. Replace the VVT sensor, refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   122 

OK → END (VVT SENSOR WAS DEFECTIVE)