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Home >> Nissan-Datsun >> 2012 >> Versa SV >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0643 To P2A00 (Sedan) >> DTC P2138: App Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E15. 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.
      APP sensor Ground Voltage
      Connector Terminal
      E12 4 Ground Approx. 5 V

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit or short to ground or shot to power in harness or connectors.

  3. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

    Check the voltage between APP sensor harness connector and ground.

    APP sensor Ground Voltage
    Connector Terminal
    E12 5 Ground Approx. 5 V

    Is the inspection result normal? 

    YES: GO TO  7.

    NO: GO TO 4.

  4. 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.
      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E12 5 E16 102 Existed

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair open circuit or short to ground or shot to power in harness or connectors.

  5. CHECK SENSOR POWER SUPPLY CIRCUIT

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

    ECM Sensor
    Connector Terminal Item Connector Terminal
    F11 75 Crankshaft position sensor (POS) F15 1
    E16 101 Refrigerant pressure sensor E17 3
    102 APP sensor E12 5

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Repair short to ground or short to power in harness or connectors.

  6. CHECK COMPONENTS

    Check the following.

    • Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ".)
    • Refrigerant pressure sensor (Refer to "DIAGNOSIS PROCEDURE ".)

      Is the inspection result normal? 

      YES: GO TO  9.

      NO: Replace malfunctioning component.

  7. 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 as follows.
      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E12 1 E16 104 Existed
      2 111
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 8.

      NO: Repair open circuit or short to ground or shot to power in harness or connectors.

  8. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between APP sensor harness connector and ECM harness connector as follows.
      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E12 3 E16 110 Existed
      6 103
    2. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 9.

      NO: Repair open circuit or short to ground or shot to power in harness or connectors.

  9. CHECK APP SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  11.

    NO: GO TO 10.

  10. REPLACE ACCELERATOR PEDAL ASSEMBLY

    Replace accelerator pedal assembly. Refer to "EXPLODED VIEW ".

    : INSPECTION END

  11. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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