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Home >> Nissan-Datsun >> 2010 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0643 To P2A00 >> P0643 Sensor Power Supply >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E38. Refer to "CIRCUIT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace ground connection.

  2. CHECK ACCELERATOR PEDAL POSITION 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.
    TERMINAL VOLTAGE REFERENCE CHART

    APP sensor Ground Voltage
    Connector Terminal
    E110 4 Ground Approx. 5 V

    Is the inspection result normal? 

    YES: GO TO  7.

    NO: GO TO 3.

  3. CHECK SENSOR POWER SUPPLY CIRCUITS

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

    TERMINAL REFERENCE CHART

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F8 72 Electric throttle control actuator F29 2
    78 CMP sensor (PHASE) F26 1
    E16 106 APP sensor E110 4

    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 camshaft position sensor (PHASE).

  5. CHECK TP SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  9.

    NO: GO TO 6.

  6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
    1. Replace electric throttle control actuator.
    2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING : SPECIAL REPAIR REQUIREMENT ".

    INSPECTION END

  7. CHECK APP SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  9.

    NO: GO TO 8.

  8. REPLACE ACCELERATOR PEDAL ASSEMBLY
    1. Replace accelerator pedal assembly.
    2. Perform "SPECIAL REPAIR REQUIREMENT ".

    INSPECTION END

  9. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END