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Home >> Infiniti >> 2010 >> M35 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1217 To P2A03 >> DTC P2127, P2128: App Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connections M16, M70. Refer to "GROUND INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connections.

  2. CHECK ACCELERATOR PEDAL POSITION (APP) SENSOR 2 POWER SUPPLY CIRCUIT-I
    1. Disconnect APP sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between APP sensor harness connector and ground.
      CONNECTOR TERMINAL VOLTAGE CHART

      APP sensor Ground Voltage (V)
      Connector Terminal
      E113 5 Ground Approx. 5
      Fig 1: Checking Voltage Between APP Sensor Terminal 5 And Ground
      G04925581Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO  7.

      NO: GO TO 3.

  3. 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.
      CONNECTOR TERMINAL CONTINUITY CHART

      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E113 5 M9 103 Existed

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E108, M15
    • Harness for open between ECM and APP sensor

      Repair open circuit.

  5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III

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

    ECM SPECIFICATIONS

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F105 46 Crankshaft position (CKP) sensor F52 1
    F106 64 Camshaft position (CMP) sensor (bank 2) F32 1
    Exhaust valve timing (EVT) control position sensor (bank 2) F83 1
    Battery current sensor E67 1
    M9 103 APP sensor E113 5
    107 EVAP control system pressure sensor B172 3
    111 Refrigerant pressure sensor E66 1

    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.

  7. CHECK APP SENSOR 2 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.
      CONNECTOR TERMINAL CONTINUITY CHART

      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E113 1 M9 104 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO  9.

      NO: GO TO 8.

  8. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E108, M15
    • Harness for open or short between ECM and APP sensor

      Repair open circuit, short to ground or short to power in harness or connectors.

  9. CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between APP sensor harness connector and ECM harness connector.
      CONNECTOR TERMINAL CONTINUITY CHART

      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E113 6 M9 98 Existed
    2. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO  11.

      NO: GO TO 10.

  10. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E108, M15
    • 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

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  13.

    NO: GO TO 12.

  12. REPLACE ACCELERATOR PEDAL ASSEMBLY
    1. Replace accelerator pedal assembly.
    2. Go to "SPECIAL REPAIR REQUIREMENT ".

      INSPECTION END

  13. CHECK INTERMITTENT INCIDENT

    Refer to "DESCRIPTION ".

    INSPECTION END

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