Fuel Injection System [08/2017 - 08/2018]: Procedure

1. Check the PCV hose connections (Refer to PROCEDURE - Step 2 ).

   OK

   PCV hose is connected correctly and is not damaged.

Result: 

NG 

REPAIR OR REPLACE PCV HOSE 

Result: 

OK 

See step  2

HINT: 

If a malfunction occurs when depressing the brake pedal, inspect the brake booster assembly, as there may be a vacuum leak in the brake booster assembly itself.

1. Check the air induction system for vacuum leakage (Refer to PROCEDURE - Step 4 ).

   OK

   No leakage from air induction system.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the air induction system (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

NG 

REPAIR OR REPLACE AIR INDUCTION SYSTEM 

Result: 

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Warm up the engine and run the engine at an engine speed of 2500 RPM for approximately 90 seconds.
5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
6. Perform the Control the Injection Volume operation with the engine idling.
7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

   HINT: 

   • Change the fuel injection volume within the range of -12.5% to +12.5%.
   • 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 sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

   Techstream Display (Sensor)	Injection Volume	Status	Voltage
   AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio)	+12.5%	Rich	Below 3.1 V
   	-12.5%	Lean	Higher than 3.4 V
   O2S B1S2 or O2S B2S2 (Heated oxygen)	+12.5%	Rich	Higher than 0.55 V
   	-12.5%	Lean	Below 0.4 V

   RESULT
   
   

   Status of AFS Voltage B1S1 or AFS Voltage B2S1	Status of O2S B1S2 or O2S B2S2	Air Fuel Ratio Condition and Air Fuel Ratio Sensor Condition	Suspected Trouble Area	Proceed to
   Lean/Rich	Lean/Rich	Normal	-	A
   Lean	Lean	Actual air fuel ratio lean	PCV valve and hose PCV hose connections Fuel injector blockage Gas leaks from exhaust system Air induction system Fuel pressure Mass air flow meter Engine coolant temperature sensor	A
   Rich	Rich	Actual air fuel ratio rich	Fuel injector leaks or blockage Gas leaks from exhaust system Ignition system Fuel pressure Mass air flow meter Engine coolant temperature sensor	A
   Lean	Lean/Rich	Air fuel ratio sensor malfunction	Air fuel ratio sensor	B
   Rich	Lean/Rich	Air fuel ratio sensor malfunction	Air fuel ratio sensor	B

   Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor output voltage (AFS Voltage) is consistently higher than 3.4 V, and the heated oxygen sensor output voltage (O2S) is consistently below 0.4 V.

   Rich: During the Control the Injection Volume for A/F Sensor Active Test, the AFS Voltage is consistently below 3.1 V, and the O2S is consistently higher than 0.55 V.

   Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output voltage of the heated oxygen sensor alternates correctly.

Result: 

B 

See step  10

Result: 

A 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.
5. Read the Coolant Temp twice, when the engine is both cold and warmed up.

   Standard

   With cold engine: Same as ambient air temperature.

   With warm engine: Between 75°C and 100°C (167°F and 212°F).

   HINT: 

   Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

NG 

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

OK 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / MAF and Coolant Temp.
5. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or more.
6. Read MAF with the engine speed at 3000 RPM.

   Standard

   Between 18.0 gm/sec and 27.0 gm/sec (shift lever: N; A/C: Off).

Result: 

NG 

See step  15

Result: 

OK 

See step  6

1. Check the fuel pressure (Refer to PROCEDURE - Step 2 ).

Result: 

NG 

REPAIR OR REPLACE FUEL SYSTEM 

Result: 

OK 

See step  7

1. Check for exhaust gas leak.

   OK

   No gas leakage.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the exhaust system (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

NG 

REPAIR OR REPLACE EXHAUST SYSTEM 

Result: 

OK 

See step  8

1. Perform a spark test (Refer to PROCEDURE - Step 1 ).

   HINT: 

   • If the result of the spark test is normal, proceed to the next step.
   • If the spark plugs or ignition system malfunctions, engine misfire may occur. The misfire count can be read using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Misfire / Cylinder #1 Misfire Count (to Cylinder #8 Misfire Count).

Result: 

NEXT 

See step  9

1. Check the injection and volume.

   HINT: 

   • Refer to the fuel injector assembly inspection procedure (Refer to INSPECTION [08/2015 - 08/2018] ).
   • If the fuel injector assemblies malfunction, engine misfire may occur. The misfire count can be read using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Misfire / Cylinder #1 Misfire Count (to Cylinder #8 Misfire Count).
   • Perform "Inspection After Repair" after replacing the fuel injector assembly (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

NG 

REPLACE FUEL INJECTOR 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

OK 

See step  10

Refer to PROCEDURE - Step 1

Result: 

NG 

REPLACE AIR FUEL RATIO SENSOR 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

OK 

See step  11

Refer to PROCEDURE - Step 2

Result: 

NG 

See step  20

Result: 

OK 

See step  12

1. Disconnect the D19 or D20 A/F sensor connector.
2. Disconnect the D56 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D19-1 (HA1A) - D56-22 (HA1A)	Always	Below 1 Ω
   D19-3 (A1A+) - D56-126 (A1A+)	Always	Below 1 Ω
   D19-4 (A1A-) - D56-125 (A1A-)	Always	Below 1 Ω
   D20-1 (HA2A) - D56-20 (HA2A)	Always	Below 1 Ω
   D20-3 (A2A+) - D56-103 (A2A+)	Always	Below 1 Ω
   D20-4 (A2A-) - D56-102 (A2A-)	Always	Below 1 Ω
   D19-1 (HA1A) or D56-22 (HA1A) - Body ground	Always	10 kΩ or higher
   D19-3 (A1A+) or D56-126 (A1A+) - Body ground	Always	10 kΩ or higher
   D19-4 (A1A-) or D56-125 (A1A-) - Body ground	Always	10 kΩ or higher
   D20-1 (HA2A) or D56-20 (HA2A) - Body ground	Always	10 kΩ or higher
   D20-3 (A2A+) or D56-103 (A2A+) - Body ground	Always	10 kΩ or higher
   D20-4 (A2A-) or D56-102 (A2A-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  13

1. Replace the air fuel ratio sensor (Refer to REMOVAL [08/2015 - 08/2018] ).

   HINT: 

   Perform "Inspection After Repair" after replacing the air fuel ratio sensor (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

NEXT 

See step  14

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2018] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the Techstream on.
7. Start the engine and warm it up.
8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern section of the DTC inspection procedure that was being performed before coming to this fuel injection system inspection procedure.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Read DTCs.
    RESULT
    
    

    Result	Proceed to
    DTC that was output before coming to this fuel injection system inspection procedure is output	A
    DTC is not output	B

Result: 

B 

END 

Result: 

A 

See step  15

1. Check the connection and terminal contact pressure of the connectors and wire harnesses between the mass air flow meter and ECM (Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [08/2015 - 08/2019] ).

   HINT: 

   Repair any problems.

Result: 

NEXT 

See step  16

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2018] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the Techstream on.
7. Start the engine and warm it up.
8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern section of the DTC inspection procedure that was being performed before coming to this fuel injection system inspection procedure.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Read DTCs.
    RESULT
    
    

    Result	Proceed to
    DTC that was output before coming to this fuel injection system inspection procedure is output	A
    DTC is not output	B

Result: 

B 

END 

Result: 

A 

See step  17

Refer to PROCEDURE - Step 3

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  18

1. Replace the mass air flow meter (Refer to REMOVAL [08/2015 - 08/2018] ).

   HINT: 

   • If the result of the inspection performed in step 5 indicated no problem, proceed to the next step without replacing the mass air flow meter.
   • Perform "Inspection After Repair" after replacing the mass air flow meter (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

NEXT 

See step  19

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2018] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the Techstream on.
7. Start the engine and warm it up.
8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern section of the DTC inspection procedure that was being performed before coming to this fuel injection system inspection procedure.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Read DTCs.
    RESULT
    
    

    Result	Proceed to
    DTC is not output	A
    DTC that was output before coming to this fuel injection system inspection procedure is output	B

Result: 

A 

END 

Result: 

B 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - 08/2018] )

Refer to PROCEDURE - Step 4

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  21

Refer to PROCEDURE - Step 3

Result: 

OK 

CHECK ECM POWER SOURCE CIRCUIT 

(Refer to ECM Power Source Circuit [08/2017 - 08/2018] )

Result: 

NG 

REPLACE INTEGRATION RELAY