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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (4 Of 4)) >> DTC/Circuit Diagnosis >> P2128 App Sensor >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

WARNING: This page is about a different variant/trim than selected.
  1. CHECK APP SENSOR 2 POWER SUPPLY 
    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 and ground.

      +

      -

      Voltage

      (Approx.)

      APP sensor

      Connector

      Terminal

      E40

      2

      Ground

      5 V

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. CHECK SENSOR POWER SUPPLY 2 CIRCUIT 

    Refer to Diagnosis Procedure .

    Is inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace error-detected parts.

  3. 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

      E40

      6

      E31

      154

      Existed

    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT 
    1. Check the continuity between APP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      APP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      E40

      1

      E31

      153

      Existed

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

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace error-detected parts

  5. CHECK APP SENSOR 

    Check the APP sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Inspection .

    NO

    Replace accelerator pedal assembly. Refer to Removal & Installation .