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Home >> Infiniti >> 2011 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Transfer Case (ATX90A)) >> DTC/Circuit Diagnosis >> DTC P180E: Sensor Power Supply (8V) >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK TRANSFER INTERNAL SPEED SENSOR POWER SUPPLY (1)
    1. Turn the ignition switch OFF.
    2. Disconnect transfer control actuator harness connector.
    3. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    4. Check the voltage between transfer control actuator harness connector terminals.
      VOLTAGE SPECIFICATION

      + - Voltage
      Transfer control actuator
      Connector Terminal
      F52 3 7 Approx. 8 V

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. CHECK TRANSFER INTERNAL SPEED SENSOR CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect transfer control unit harness connector.
    3. Check the continuity between transfer control unit harness connector and transfer control actuator harness connector.
      CONTINUITY SPECIFICATION

      Transfer control unit Transfer control actuator Continuity
      Connector Terminal Connector Terminal
      E59 39 F52 3 Existed
      9 7
    4. Check the continuity between transfer control actuator harness connector and ground.
      CONTINUITY SPECIFICATION

      Transfer control actuator - Continuity
      Connector Terminal
      F52 7 Ground Not existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace error-detected parts.

  3. CHECK TRANSFER INTERNAL SPEED SENSOR POWER SUPPLY (2)
    1. Turn the ignition switch OFF.
    2. Connect transfer control actuator harness connector.
    3. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    4. Check the voltage between transfer control actuator harness connector terminals.
      VOLTAGE SPECIFICATION

      + - Voltage
      Transfer control actuator
      Connector Terminal
      F52 3 7 Approx. 8 V

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Transfer internal speed sensor is malfunctioning. Replace transfer control actuator. Refer to "REMOVAL AND INSTALLATION ".

  4. CHECK TERMINALS AND HARNESS CONNECTORS

    Check the pin terminals for damage or loose connection with each harness connector.

    Is the inspection result normal? 

    YES: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair or replace error-detected parts.

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