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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 476 (Engine Control System (DTC/Circuit Diagnosis) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P2138: App Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK APP SENSOR 1 POWER SUPPLY-1 
    1. Turn ignition switch OFF.
    2. Disconnect accelerator pedal position (APP) sensor harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between APP sensor harness connector terminals.

      APP sensor

      Voltage

      (Approx.)

      Connector

      +

      -

      Terminal

      E20

      2

      4

      5 V

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    GO TO 2.

  2. CHECK APP SENSOR 1 POWER SUPPLY-2 

    Check the voltage between APP sensor harness connector and ground.

    +

    -

    Voltage

    (Approx.)

    APP sensor

    Connector

    Terminal

    E20

    2

    Ground

    5 V

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    GO TO 3.

  3. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between APP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      APP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      E20

      2

      E16

      146

      Existed
    4. Also check harness for short to ground.

    Is the inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace error-detected parts.

  4. CHECK APP SENSOR 2 POWER SUPPLY-1 

    Check the voltage between APP sensor harness connector and ground.

    APP sensor

    Voltage

    (Approx.)

    Connector

    +

    -

    Terminal

    E20

    1

    5

    5 V

    Is the inspection result normal?

    YES

    GO TO 11.

    NO

    GO TO 5.

  5. CHECK APP SENSOR 2 POWER SUPPLY-2 

    Check the voltage between APP sensor harness connector and ground.

    +

    -

    Voltage

    (Approx.)

    APP sensor

    Connector

    Terminal

    E20

    1

    Ground

    5 V

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    GO TO 6.

  6. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between APP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      APP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      E20

      1

      E16

      142

      Existed
    4. Also check harness for short to ground.

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Repair or replace error-detected parts.

  7. CHECK SENSOR POWER SUPPLY 2 CIRCUIT 

    Check sensor power supply 2 circuit. Refer to DTC Diagnosis Procedure .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replace error-detected parts.

  8. CHECK APP SENSOR 1 GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between APP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      APP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      E20

      4

      E16

      151

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

    Repair or replace error-detected parts.

  9. CHECK APP SENSOR 2 GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between APP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      APP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      E20

      5

      E16

      144

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

    Repair or replace error-detected parts.

  10. CHECK ECM GROUND CIRCUIT 

    Check the continuity between ECM harness connector and the ground.

    +

    -

    Continuity

    ECM

    Connector

    Terminal

    E16

    147

    Ground

    Existed

    149

    152

    F54

    10

    55

    F77

    110

    Is inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replace error-detected parts.

  11. CHECK APP SENSOR INPUT SIGNAL CIRCUIT 
    1. Check the continuity between APP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      APP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      E20

      3

      E16

      150

      Existed

      6

      143
    2. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES

    GO TO 12.

    NO

    Repair or replace error-detected parts

  12. CHECK APP SENSOR 

    Check the APP sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Replace accelerator pedal assembly. Refer to Removal and Installation .

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