DTC P1603: Engine Stall History; DTC P1605: Rough Idling: 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.

   Result

   Result	Proceed to
   Only DTC P1603 and/or P1605 are output	A
   DTCs other than P1603 and P1605 are output	B

B → See step   60 

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

   Problem Symptom	Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
   	Closed Throttle Position SW	Engine Speed	Total of Short FT and Long FT
   When idling or decelerating, engine speed slowly decreases and engine stalls	All 5 sets of freeze frame data are ON	Decreases slowly*1	All 5 sets of freeze frame data are +15% or more*2	Air suction Sensor malfunction (value from sensor too lean) Fuel supply problem	A
   			At least 1 of the 5 sets of freeze frame data is -15% or less*3	Sensor malfunction (value from sensor too rich)	B
   			All 5 sets of freeze frame data are from -15% to +15%	Intake air volume insufficient Ignition timing incorrect	C
   When idling or decelerating, engine speed rapidly decreases and engine stalls		Decreases rapidly*1	-	Injection stoppage, ignition stoppage Load from external parts	D
   When accelerating or driving at constant speed, engine stalls*4	At least one is OFF	-	-	Sensor malfunction Injection stoppage, ignition stoppage Fuel supply problem	E

   Fig 1: Identifying Rapid Decrease in Engine Speed Freeze Frame Data

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   • *1: A rapid decrease in engine speed may have been caused by an electrical malfunction in the shared wiring of all or multiple cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions apply.

     Otherwise, the engine speed is considered to have decreased slowly.

     1. In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 RPM or more.
     2. In the freeze frame data, the engine speed at #5 is 120 RPM or less.
   • If the vehicle speed is 9.3 mph (15 km/h) or less and the difference between Engine Speed and SPD (NT) is 100 RPM or less, inspect the automatic transmission. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T lock-up release being late.)
   • *2: When a DTC is stored, feedback compensation increases because the air-fuel ratio is determined to be lean.
   • *3: When a DTC is stored, feedback compensation decreases because the air-fuel ratio is determined to be rich.
   • *4: This item should be checked when DTC P1603 is output and is not necessary to check when only P1605 is output.

B → See step   25 

C → See step   35 

D → See step   43 

E → See step   50 

A: Go to next step 

1. Check for air suction in the intake system [vacuum hose disconnection, cracks, 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 pipes increases and the air suction noise becomes louder.
   • If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.

   OK

   There is no air suction.

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Disconnect the purge hose (on the canister side) of the purge VSV.
   Fig 2: Identifying Canister Purge VSV

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

   OK

   Air does not flow.

6. Connect the connector of the purge VSV.
7. Connect the purge hose of the purge VSV.

   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   61 

OK: 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 P1605	Result	Suspected Area	Proceed to
   Stop Light Switch	At least 1 of the 5 sets of freeze frame data is Open	Air suction from brake booster	A
   	All 5 sets of freeze frame data are Close	-	B

B → See step   7 

A: Go to next step 

Fig 3: Identifying Brake Pedal Short Techstream

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard

   Short FT #1 or Short FT #2 changes by +10% or less.

   HINT: 

   • Even if the results are normal, the brake booster may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the brake booster (refer to step 57).
   • When air suction is present, the feedback compensation increases because the air-fuel ratio becomes lean.
   • It is also possible to perform the airtightness inspection to check the brake booster. Refer to ON-VEHICLE INSPECTION .

NG → See step   62 

OK: 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 P1605	Result	Suspected Area	Proceed to
   Calculate Load	Below 90% of the current value of the vehicle*1	Mass air flow meter	A
   AFS Voltage B1S1 and AFS Voltage B2S1	3.3 V or higher*2	Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal	B
   Both freeze frame data items listed above	Values are other than above	-	C

   HINT: 

   • Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in P or N) and compare these data with the freeze frame data.
   • *1: If the mass air flow meter is malfunctioning and incorrectly measures the pressure to be less than the actual intake manifold pressure, the freeze frame data will show a low engine load value.
   • *2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is lean, the actual air-fuel ratio will become rich and the engine may stall.

B → See step   9 

C → See step   12 

A: Go to next step 

1. Remove the mass air flow meter.
2. Check for foreign matter in the air flow passage of the mass air flow meter.

   Result

   Result	Proceed to
   Visible foreign matter is present	A
   Visible foreign matter is not present	B

3. Install the mass air flow meter.

   HINT: 

   Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

B → See step   12 

A → See step   63 

1. Connect the Techstream to the DLC3.
   Fig 4: Inspecting Air Fuel Ratio Sensor And Heated Oxygen Sensor Output Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch on (IG).
3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
4. Idle the engine.
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
7. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

   Standard

   Techstream Display	Specified Condition
   Control the Injection Volume for A/F Sensor (25%)	Air fuel ratio sensor output voltage is below 3.1 V
   Control the Injection Volume for A/F Sensor (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

   Result

   Result	Proceed to
   NG	A
   OK	B

   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.
   • Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).

B → See step   12 

A: Go to next step 

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

   Standard Voltage

   BANK 1
   
   

   Tester Connection	Switch Condition	Specified Condition
   B20-2 (+B) - Body ground	Ignition switch on (IG)	11 to 14 V

   BANK 2
   
   

   Tester Connection	Switch Condition	Specified Condition
   B19-2 (+B) - 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 air fuel ratio sensor connector.

NG → See step   64 

OK: Go to next step 

1. Disconnect the air fuel ratio 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)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B20-1 (HA1A) - B48-17 (HA1A)	Always	Below 1 Ω
   B20-3 (A1A+) - B49-1 (A1A+)	Always	Below 1 Ω
   B20-4 (A1A-) - B49-2 (A1A-)	Always	Below 1 Ω

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B19-1 (HA2A) - B48-19 (HA2A)	Always	Below 1 Ω
   B19-3 (A2A+) - B49-7 (A2A+)	Always	Below 1 Ω
   B19-4 (A2A-) - B49-8 (A2A-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B20-1 (HA1A) or B48-17 (HA1A) - Body ground	Always	10 kΩ or higher
   B20-3 (A1A+) or B49-1 (A1A+) - Body ground	Always	10 kΩ or higher
   B20-4 (A1A-) or B49-2 (A1A-) - Body ground	Always	10 kΩ or higher

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B19-1 (HA2A) or B48-19 (HA2A) - Body ground	Always	10 kΩ or higher
   B19-3 (A2A+) or B49-7 (A2A+) - Body ground	Always	10 kΩ or higher
   B19-4 (A2A-) or B49-8 (A2A-) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   NG	A
   OK	B

   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 air fuel ratio sensor connector.

B → See step   65 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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 P1605	Result	Proceed to
   Initial Engine Coolant Temp, Ambient Temp for A/C, Initial Intake Air Temp	Difference in temperature between each item is below 10°C (18°F)*1	A
   	Difference in temperature between each item is 10°C (18°F) or more*2	B

   HINT: 

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

B → See step   15 

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 .
   Fig 5: Identifying Engine Coolant Temperature Increase After Engine Start Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result

   Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
   Initial Engine Coolant Temp, Coolant Temp, Engine Run Time	Range A	Engine coolant temperature sensor Thermostat	A
   	Range B	Engine coolant temperature sensor	B
   	Range C	-	C

   HINT: 

   This step is not directly related to engine stall.

B → See step   16 

C → See step   17 

A: Go to next step 

HINT: 

For the thermostat inspection, refer to the following procedures. Refer to INSPECTION .

Result

HINT: 

This step is not directly related to engine stall.

B → See step   16 

A → See step   66 

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 P1605	Result	Suspected Area	Proceed to
   Coolant Temp	120°C (248°F) or more	Engine coolant temperature sensor	A
   Coolant Temp, Ambient Temp for A/C	Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more	Engine coolant temperature sensor
   Both freeze frame data items listed above	Values are other than above	-	B

B → See step   17 

A: Go to next step 

HINT: 

For the engine coolant temperature sensor inspection, refer to the following procedures. Refer to INSPECTION .

Result

HINT: 

Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).

B → See step   17 

A → See step   67 

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 P1605	Result	Suspected Area	Proceed to
   EVAP (Purge) VSV	At least 1 of the 5 sets of freeze frame data is not 0%	Purge VSV	A
   	All 5 sets of freeze frame data are 0%	-	B

   HINT: 

   If the purge VSV is stuck closed, air-fuel ratio compensation by the purge VSV is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall.

B → See step   22 

A: Go to next step 

1. Disconnect the purge hose (on the canister side) of the purge VSV.
   Fig 6: Identifying Purge Hose VSV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Start the engine.
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Evap Control.
7. When the purge VSV is operated using the Techstream, check whether the part of the purge VSV applies suction to your finger.

   Standard

   Techstream Operation	Specified Condition
   ON	Purge VSV port applies suction to finger
   OFF	Purge VSV port applies no suction to finger

   Result

   Result	Proceed to
   NG	A
   OK	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge VSV (refer to step 57).

B → See step   22 

A: Go to next step 

Fig 7: Identifying Purge VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the purge VSV connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 2	20°C (68°F)	23 to 26 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Purge VSV)

3. Reconnect the purge VSV connector.

NG → See step   68 

OK: Go to next step 

1. Disconnect the purge VSV 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
   B29-1 - 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 purge VSV connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI RELAY) 

OK: Go to next step 

1. Disconnect the purge VSV 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
   B29-2 - B49-18 (PRG)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B29-2 or B49-18 (PRG) - 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 purge VSV connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   69 

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. Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream.

   Standard

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

   Result

   Result	Proceed to
   NG	A
   OK	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
   • If the fuel pump operating noise is abnormal, proceed to step 23.

B → See step   24 

A: Go to next step 

1. Disconnect the fuel pump connector.
   Fig 8: Identifying Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Fuel Pump)

3. Reconnect the fuel pump (for low pressure) connector.

NG → See step   70 

OK → See step   71 

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

   HINT: 

   If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

B → See step   57 

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 P1605	Result	Suspected Area	Proceed to
   Calculate Load	110% or more of the current value of the vehicle*1	Mass air flow meter	A
   AFS Voltage B1S1 and AFS Voltage B2S1	Below 3.3 V*2	Air fuel ratio sensor Harness and connector Actual air-fuel ratio abnormal	B
   Both freeze frame data items listed above	Values are other than above	-	C

   HINT: 

   • Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in P or N) and compare these data with the freeze frame data.
   • *1: If the mass air flow meter is malfunctioning and incorrectly measures the intake air volume to be higher than the actual volume of air flowing through the intake manifold, the freeze frame data will show a high engine load value.
   • *2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall.

B → See step   27 

C → See step   30 

A: Go to next step 

1. Remove the mass air flow meter.
2. Check for foreign matter in the air flow passage of the mass air flow meter.

   Result

   Result	Proceed to
   Visible foreign matter is present	A
   Visible foreign matter is not present	B

   HINT: 

   Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

B → See step   30 

A → See step   63 

1. Connect the Techstream to the DLC3.
   Fig 9: Inspecting Air Fuel Ratio Sensor And Heated Oxygen Sensor Output Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch on (IG).
3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
4. Idle the engine.
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
7. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

   Standard

   Techstream Display	Specified Condition
   Control the Injection Volume for A/F Sensor (25%)	Air fuel ratio sensor output voltage is below 3.1 V
   Control the Injection Volume for A/F Sensor (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

   Result

   Result	Proceed to
   NG	A
   OK	B

   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.
   • Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).

B → See step   30 

A: Go to next step 

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

   Standard Voltage

   BANK 1
   
   

   Tester Connection	Switch Condition	Specified Condition
   B20-2 (+B) - Body ground	Ignition switch on (IG)	11 to 14 V

   BANK 2
   
   

   Tester Connection	Switch Condition	Specified Condition
   B19-2 (+B) - 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 air fuel ratio sensor connector.

NG → See step   64 

OK: Go to next step 

1. Disconnect the air fuel ratio 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)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B20-1 (HA1A) - B48-17 (HA1A)	Always	Below 1 Ω
   B20-3 (A1A+) - B49-1 (A1A+)	Always	Below 1 Ω
   B20-4 (A1A-) - B49-2 (A1A-)	Always	Below 1 Ω

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B19-1 (HA2A) - B48-19 (HA2A)	Always	Below 1 Ω
   B19-3 (A2A+) - B49-7 (A2A+)	Always	Below 1 Ω
   B19-4 (A2A-) - B49-8 (A2A-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   BANK 1
   
   

   Tester Connection	Condition	Specified Condition
   B20-1 (HA1A) or B48-17 (HA1A) - Body ground	Always	10 kΩ or higher
   B20-3 (A1A+) or B49-1 (A1A+) - Body ground	Always	10 kΩ or higher
   B20-4 (A1A-) or B49-2 (A1A-) - Body ground	Always	10 kΩ or higher

   BANK 2
   
   

   Tester Connection	Condition	Specified Condition
   B19-1 (HA2A) or B48-19 (HA2A) - Body ground	Always	10 kΩ or higher
   B19-3 (A2A+) or B49-7 (A2A+) - Body ground	Always	10 kΩ or higher
   B19-4 (A2A-) or B49-8 (A2A-) - 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 air fuel ratio sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   65 

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 P1605	Result	Proceed to
   Initial Engine Coolant Temp, Ambient Temp for A/C, Initial Intake Air Temp	Difference in temperature between each item is below 10°C (18°F)*1	A
   	Difference in temperature between each item is 10°C (18°F) or more*2	B

   HINT: 

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

B → See step   33 

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 when the DTC was stored which are recorded in the freeze frame data.
   Fig 10: Identifying Engine Coolant Temperature Increase After Engine Start Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result

   Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
   Initial Engine Coolant Temp, Coolant Temp, Engine Run Time	Range A	Engine coolant temperature sensor Thermostat	A
   	Range B	Engine coolant temperature	B
   	Range C	-	C

   HINT: 

   This step is not directly related to engine stall.

B → See step   34 

C → See step   58 

A: Go to next step 

HINT: 

For the thermostat inspection, refer to the following procedures. Refer to INSPECTION .

Result

HINT: 

This step is not directly related to engine stall.

B → See step   34 

A → See step   66 

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 P1605	Result	Suspected Area	Proceed to
   Coolant Temp	120°C (248°F) or higher	Engine coolant temperature sensor	A
   Coolant Temp, Ambient Temp for A/C	Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more	Engine coolant temperature sensor
   Both freeze frame data items listed above	Values are other than above	-	B

B → See step   58 

A: Go to next step 

HINT: 

For the engine coolant temperature sensor inspection, refer to the following procedures. Refer to INSPECTION .

Result

HINT: 

Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. If there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).

B → See step   57 

A → See step   67 

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 P1605	Result	Suspected Area	Proceed to
   Total of ISC Learning Value and ISC Feedback Value	Below 80% of the current value of the vehicle*1	Throttle body assembly	A
   	120% or more of the current value of the vehicle*2		B
   	From 80 to 120% of the current value of the vehicle	-	C

   HINT: 

   • Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in P or N) and compare these data with the freeze frame data.
   • *1: If the throttle body assembly has a temporary problem in which it cannot fully close, the intake air volume and engine speed increase. As a result, the ISC learning amount becomes less than the standard. At this time, if the throttle body assembly returns to normal and fully closes, the intake air volume will be insufficient and the engine may stall.
   • *2: If carbon accumulates on the throttle body assembly and the intake air volume decreases, the ISC learning amount is increased to maintain the idling speed. If this situation continues, the ISC learning amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall.

B → See step   37 

C → See step   38 

A: Go to next step 

1. Check for foreign matter and signs that the throttle body assembly was stuck, and also check that the valve and shaft move smoothly during operation.

   Result

   Result	Proceed to
   NG	A
   OK	B

   HINT: 

   Even if the results are normal, the throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57).

B → See step   38 

A → See step   72 

1. Check if carbon is in the air flow passage of the throttle body.

   Result

   Result	Proceed to
   Carbon in passage	A
   No carbon in passage	B

   HINT: 

   Even if the results are normal, the throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57).

B → See step   38 

A → See step   72 

Fig 11: 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 is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

NG → See step   73 

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 camshaft timing oil control valve using the Techstream.

   OK

   Techstream Operation	Specified Condition
   0%	Normal engine speed
   100%	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 is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

NG → See step   74 

OK: 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 P1605		Suspected Area	Proceed to
   IGN Advance	Knock Correct Learn Value
   Differs from the current value of the vehicle by 10° or more	Below 3°	Engine coolant temperature sensor Mass air flow meter Knock sensor	A
   	3° or more	-	B
   Differs from the current value of the vehicle by less than 10°	-	-

   HINT: 

   • Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in P or N) and compare these data with the freeze frame data.
   • Even if the results are normal, the knock control sensors may have been malfunctioning. If there are no problems with other parts, replace the knock control sensors (refer to step 57).

B → See step   57 

A: Go to next step 

HINT: 

For the engine coolant temperature inspection, refer to the following procedures. Refer to INSPECTION .

NG → See step   67 

OK: Go to next step 

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

   HINT: 

   If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.

NG → See step   63 

OK → See step   75 

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 - 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.
   • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
4. Reconnect the fuel injector connector.

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

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.
   • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
4. Reconnect the ignition coil connector.

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

OK: 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 P1605	Result	Suspected Area	Proceed to
   Idle Spark Advn Ctrl (#1 to #6)	At least one cylinder shows a value of 4° or more	Fuel injector system Ignition coil system	A
   	All cylinders show a value of less than 4°	-	B

B → See step   47 

A: Go to next step 

1. Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #6) was 4° or more in step 45.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Data List / Idle Spark Advn Ctrl (#1 to #6).
   RESULT
   
   

   Result	Proceed to
   Same as result in step 45	A
   Different from result in step 45	B

   HINT: 

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

B → See step   76 

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 P1605			Suspected Area	Proceed to
   A/C Signal	Air Conditioner FB Val	PS Feedback Val
   A/C Signal display does not change from OFF*	-	Value is 0 L/s	-	A
   		Value is shown	Power steering system
   A/C Signal display changes from OFF to ON*	Value is 0 L/s	Value is shown
   		Value is 0 L/s	-
   	Value is shown	-	A/C system	B

   • *: Check not only the ON / OFF state of the air conditioner but also the change in air conditioner load.

   HINT: 

   • Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in P or N) and compare these data with the freeze frame data.
   • The normal value for the ISC learning amount is engine displacement (liters) x 0.9.
   • Even if the results are normal, the power steering system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the power steering system (refer to step 57).

B → CHECK AIR CONDITIONING SYSTEM 

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 P1605				Suspected Area	Proceed to
   Electrical Load Signal 1	Electric Load Feedback Val	Difference between Engine Speed and Turbine Speed	Vehicle Speed
   Electrical Load Signal display changes from OFF to ON*, or Value displayed for Electric Load Feedback Val increases*	Value displayed for Electric Load Val changes	-	-	Electrical load signal circuit	A
   	Value displayed for Electric Load Val does not change	At least 1 of the 5 sets of freeze frame data is below 100 RPM	Below 9 mph (15 km/h)	A/T system	B
   			9 mph (15 km/h) or more	-	C
   		All 5 sets of freeze frame data are 100 RPM or more	-	-	C
   Electrical Load Signal display does not change from OFF, or Value displayed for Electric Load Feedback Val does not increase	-	At least 1 of the 5 sets of freeze frame data is below 100 RPM	Below 9 mph (15 km/h)	A/T system	B
   			9 mph (15 km/h) or more	-	C
   		All 5 sets of freeze frame data are 100 RPM or more	-	-	C

   • *: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.

   HINT: 

   • The normal value for the ISC learning amount is engine displacement (liters) x 0.9.
   • Even if the results are normal, the electrical load signal system and/or the A/T system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the electrical load system and/or the A/T system (refer to step 57).

B → CHECK AUTOMATIC TRANSMISSION SYSTEM 

C → See step   49 

A → See step   77 

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 P1605		Suspected Area	Proceed to
   Shift SW Status (P Range) or Shift SW Status (N Range)	Neutral Position SW Signal
   Shift SW Status (P Range) and Shift SW Status (N Range) are both OFF in at least one data set	In D or R, Neutral Position SW Signal is ON	Park/neutral position switch	A
   	In D or R, Neutral Position SW Signal is OFF	A/T system	B
   All 5 sets of freeze frame data are ON	-	-	C

   HINT: 

   Even if the results are normal, the park/neutral position switch and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or A/T system (refer to step 57).

B → CHECK AUTOMATIC TRANSMISSION SYSTEM 

C → See step   59 

A → CHECK PARK/NEUTRAL POSITION SWITCH 

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 P1605	Result	Suspected Area	Proceed to
   Throttle Sensor Position, Calculate Load	Calculate Load decreases while Throttle Sensor Position increases	Mass air flow meter	A
   	Calculate Load does not decrease while Throttle Sensor Position increases	-	B

B → See step   52 

A: Go to next step 

1. Remove the mass air flow meter.
2. Check for foreign matter in the air flow passage of the mass air flow meter.

   Result

   Result	Proceed to
   Visible foreign matter is present	A
   Visible foreign matter is not present	B

3. Install the mass air flow meter.

   HINT: 

   Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 56, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

B → See step   52 

A → See step   63 

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 - 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.
   • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
4. Reconnect the fuel injector connector.

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

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.
   • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
4. Reconnect the ignition coil connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - 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. Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream.

   Specified Condition

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

   Result

   Result	Proceed to
   NG	A
   OK	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
   • If the fuel pump operating noise is abnormal, proceed to step 55.

B → See step   56 

A: Go to next step 

1. Disconnect the fuel pump connector.
   Fig 12: Identifying Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Fuel Pump)

3. Reconnect the fuel pump (for low pressure) connector.

NG → See step   70 

OK → See step   78 

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, 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   57 

A → REPAIR OR REPLACE FUEL SYSTEM (FOR LOW PRESSURE) 

1. If the malfunction could not be identified in steps 3 to 24, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

   Performed Step	Inspection or Part to Replace
   Step 6	Brake booster replacement
   Step 8	Mass air flow meter replacement
   Step 9	Air fuel ratio sensor replacement
   Step 16	Engine coolant temperature sensor replacement
   Step 18	Purge VSV replacement
   Step 24	Fuel pump replacement

2. If the malfunction could not be identified in steps 25 to 34, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

   Performed Step	Inspection or Part to Replace
   Step 26	Mass air flow meter replacement
   Step 27	Air fuel ratio sensor replacement
   Step 34	Engine coolant temperature sensor replacement

3. If the malfunction could not be identified in steps 35 to 42, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

   Performed Step	Inspection or Part to Replace
   Step 36, 37	Throttle body assembly replacement
   Step 40	Knock sensor replacement

4. If the malfunction could not be identified in steps 43 to 49, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed.

   Performed Step	Inspection or Part to Replace
   Step 47	A/C system inspection and repair Power steering system inspection and repair
   Step 48	A/T system inspection and repair Electrical load system inspection and repair
   Step 49	Park/neutral position switch inspection and repair A/T system inspection and repair

5. If the malfunction could not be identified in steps 50 to 56, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

   Performed Step	Inspection or Part to Replace
   Step 51	Mass air flow meter replacement

   HINT: 

   Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Check if engine stall symptoms are present.

   HINT: 

   If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection.

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → END