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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0463 >> DTC P0335: CKP Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK CRANKSHAFT POSITION SENSOR POWER SUPPLY CIRCUIT-I
    1. Disconnect crankshaft position (CKP) sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between CKP sensor harness connector and ground.
    CKP sensor Ground Voltage (V)
    Connector Terminal
    F74 1 Ground Approx. 5

    Is the inspection result normal? 

    YES: GO TO  7.

    NO: GO TO 2.

  2. CHECK CKP SENSOR POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch ON.
    2. Disconnect ECM harness connector.
    3. Check the continuity between CKP sensor harness connector and ECM harness connector.
    CKP sensor ECM Continuity
    Connector Terminal Connector Terminal
    F74 1 F110 76 Existed

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Repair open circuit.

  3. CHECK SENSOR POWER SUPPLY CIRCUIT

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

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F110 76 CKP sensor F74 1
    77 Camshaft position sensor (bank 1) F84 1
    E80 131 APP sensor 2 (Without ICC) E110 1
    APP sensor 2 (With ICC) E67 9
    133 Battery current sensor E63 2
    Refrigerant pressure sensor E77 1
    EVAP control system pressure sensor C17 3

    Is the inspection result normal? 

    YES: GO TO 4.

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

  4. CHECK COMPONENTS

    Check the following.

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace malfunctioning component.

  5. CHECK APP SENSOR

    Refer to "COMPONENT INSPECTION (ACCELERATOR PEDAL POSITION SENSOR) ".

    Is the inspection result normal? 

    YES: GO TO  11.

    NO: GO TO 6.

  6. REPLACE ACCELERATOR PEDAL ASSEMBLY

    Replace accelerator pedal assembly. Refer to "MODELS WITHOUT DISTANCE CONTROL ASSIST SYSTEM: REMOVAL AND INSTALLATION " (Without distance control assist system) or "MODELS WITH DISTANCE CONTROL ASSIST SYSTEM: REMOVAL AND INSTALLATION " (With distance control assist system).

    : INSPECTION END

  7. CHECK CKP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between CKP sensor harness connector and ECM harness connector.
      CKP sensor ECM Continuity
      Connector Terminal Connector Terminal
      F74 2 F110 98 Existed
    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, short to ground or short to power in harness or connectors.

  8. CHECK CKP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between CKP sensor harness connector and ECM harness connector.
      CKP sensor ECM Continuity
      Connector Terminal Connector Terminal
      F74 3 F110 86 Existed
    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, short to ground or short to power in harness or connectors.

  9. CHECK CRANKSHAFT POSITION SENSOR

    Refer to "COMPONENT INSPECTION (CRANKSHAFT POSITION SENSOR) ".

    Is the inspection result normal? 

    YES: GO TO 10.

    NO: Replace crankshaft position sensor.

  10. CHECK GEAR TOOTH

    Visually check for chipping signal plate gear tooth.

    Is the inspection result normal? 

    YES: GO TO 11.

    NO: Replace the signal plate.

  11. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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