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Home >> Infiniti >> 2013 >> FX50 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0460 Through P1211 >> DTC P0643: Sensor Power Supply >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION 
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in "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.
      APP sensor Ground Voltage (V)
      Connector Terminal
      E112 (Without ICC) 5 Ground Approx. 5
      E116 (With ICC) 5

      Is the inspection result normal? 

      YES: GO TO  7.

      NO: GO TO 3.

  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
    F111 84 Electric throttle control actuator (bank 1) F66 2
    88 Camshaft position sensor (bank 2) F83 1
    88 EVT control position sensor (bank 2) F63 1
    92 Power steering pressure sensor F35 3
    92 Refrigerant pressure sensor E77 3
    96 Electric throttle control actuator (bank 2) F64 2
    M160 100 APP sensor 1 (Without ICC) E112 5
    100 APP sensor 1 (With ICC) E116 5

    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.

  5. CHECK THROTTLE POSITION 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. Go to "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  7. CHECK ACCELERATOR PEDAL POSITION 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. Go to "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  9. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END