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Home >> Infiniti >> 2012 >> M37x AWD V6-3.7L (VQ37VHR) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P2138

P2138




P2138 APP SENSOR

DTC Logic


DTC DETECTION LOGIC

NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
P0643.






DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:


Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and let it idle for 1 second.
2.Check DTC.
Is DTC detected?
YES- Go to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK GROUND CONNECTION

1.Turn ignition switch OFF.
2.Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace ground connection.

2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1.Disconnect accelerator pedal position (APP) sensor harness connector.
2.Turn ignition switch ON.
3.Check the voltage between APP sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3 (With ICC).
NO- Repair open circuit, short to ground or short to power in harness or connectors (Without ICC).

3. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors M150, M151
- Harness for open or short between ECM and accelerator pedal position sensor
- Repair open circuit, short to ground or short to power in harness or connectors.

4. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

1.Turn ignition switch ON.
2.Check the voltage between APP sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 9.
NO- GO TO 5.

5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between APP sensor harness connector and ECM harness connector.





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 6 (With ICC).
NO- Repair open circuit, short to ground or short to power in harness or connectors (Without ICC).

6. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors M105, M151
- Harness for open or short between ECM and accelerator pedal position sensor
- Repair open circuit, short to ground or short to power in harness or connectors.

7. CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.





Is the inspection result normal?
YES- GO TO 8.
NO- Repair short to ground or short to power in harness or connectors.

8. CHECK COMPONENTS

Check the following.
- Crankshaft position sensor (POS) (P0335.)
- Camshaft position sensor (PHASE) (bank 2) (P0340.)
- Battery current sensor (P1550.)
- EVAP control system pressure sensor (P0451.)
- Refrigerant pressure sensor (Refrigerant Pressure Sensor.)
Is the inspection result normal?
YES- GO TO 15.
NO- Replace malfunctioning component.

9. CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between APP sensor harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 11.
NO- GO TO 10 (With ICC).
NO- Repair open circuit, short to ground or short to power in harness or connectors (Without ICC).

10. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors M150, M151
- Harness for open or short between ECM and accelerator pedal position sensor
- Repair open circuit, short to ground or short to power in harness or connectors.

11. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Check the continuity between APP sensor harness connector and ECM harness connector.





2.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 13.
NO- GO TO 12 (With ICC).
NO- Repair open circuit, short to ground or short to power in harness or connectors (Without ICC).

12. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors M150, M151
- Harness for open or short between ECM and accelerator pedal position sensor
- Repair open circuit, short to ground or short to power in harness or connectors.

13. CHECK APP SENSOR

.
Is the inspection result normal?
YES- GO TO 15.
NO- GO TO 14.

14. REPLACE ACCELERATOR PEDAL ASSEMBLY

1.Replace accelerator pedal assembly.
2.Go to .
- INSPECTION END

15. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK ACCELERATOR PEDAL POSITION SENSOR

1.Turn ignition switch OFF.
2.Reconnect all harness connectors disconnected.
3.Turn ignition switch ON.
4.Check the voltage ECM harness connector terminals as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 2.

2. REPLACE ACCELERATOR PEDAL ASSEMBLY

1.Replace accelerator pedal assembly.
2.Go to P2122.
- INSPECTION END


Special Repair Requirement


1. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Work Procedure.
- GO TO 2.

2. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Work Procedure.
- GO TO 3.

3. PERFORM IDLE AIR VOLUME LEARNING

Work Procedure.
- END
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