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Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Transfer Case (Exc Hybrid)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

  1. CHECK AWD CONTROL UNIT POWER SUPPLY (1)

    1. Turn the ignition switch OFF.
    2. Disconnect AWD control unit harness connector.
    3. Check the voltage between AWD control unit harness connector and ground.
      AWD control unit - Voltage (Approx.)
      Connector Terminal
      M42 7 Ground 0 V
    4. Turn the ignition switch ON.
      CAUTION:

      Never start the engine.

    5. Check the voltage between AWD control unit harness connector and ground.
      AWD control unit - Voltage
      Connector Terminal
      M42 7 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK AWD CONTROL UNIT POWER SUPPLY (2)

    1. Turn the ignition switch OFF.
    2. Check the 10A fuse (#22).
    3. Disconnect fuse block (J/B) harness connector.
    4. Check the continuity between AWD control unit harness connector and fuse block (J/B) harness connector.
      AWD control unit Fuse block (J/B) Continuity
      Connector Terminal Connector Terminal
      M42 7 M133 6C Existed
    5. Check the continuity between AWD control unit harness connector and the ground.
      AWD control unit - Continuity
      Connector Terminal
      M42 7 Ground Not existed

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for ignition power supply circuit. Refer to WIRING DIAGRAM - IGNITION POWER SUPPLY - .

    NO 

    Repair or replace error-detected parts.

  3. CHECK AWD CONTROL UNIT POWER SUPPLY (3)

    1. Turn the ignition switch OFF.
    2. Check the voltage between AWD control unit harness connector and ground.
      AWD control unit - Voltage (Approx.)
      Connector Terminal
      M42 15 Ground Battery voltage
    3. Turn the ignition switch ON.
      CAUTION:

      Never start the engine.

    4. Check the voltage between AWD control unit harness connector and ground.
      AWD control unit - Voltage
      Connector Terminal
      M42 15 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK AWD CONTROL UNIT POWER SUPPLY (4)

    1. Turn the ignition switch OFF.
    2. Check the 5A fuse (#17).
    3. Disconnect fuse block (J/B) harness connector.
    4. Check the continuity between AWD control unit harness connector and fuse block (J/B) harness connector.
      AWD control unit Fuse block (J/B) Continuity
      Connector Terminal Connector Terminal
      M42 15 M133 29C Existed
    5. Check the continuity between AWD control unit harness connector and the ground.
      AWD control unit - Continuity
      Connector Terminal
      M42 15 Ground Not existed

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

    NO 

    Repair or replace error-detected parts.

  5. CHECK AWD SOLENOID POWER SUPPLY (1)

    1. Turn the ignition switch OFF.
    2. Check the voltage between AWD control unit harness connector and ground.
      AWD control unit - Voltage
      Connector Terminal
      M42 9 Ground Battery voltage
    3. Turn the ignition switch ON.
      CAUTION:

      Never start the engine.

    4. Check the voltage between AWD control unit harness connector and ground.
      AWD control unit - Voltage
      Connector Terminal
      M42 9 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 6. 

  6. CHECK AWD SOLENOID POWER SUPPLY (2)

    1. Turn the ignition switch OFF.
    2. Check the 10A fuse (#70).
    3. Check the harness for open or short between AWD control unit harness connector No. 9 terminal and fuse box.

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

    NO 

    Repair or replace error-detected parts.

  7. CHECK AWD CONTROL UNIT GROUND

    1. Turn the ignition switch OFF.
    2. Check the continuity between AWD control unit harness connector and ground.
      AWD control unit - Continuity
      Connector Terminal
      M42 10 Ground Existed
      11

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair or replace error-detected parts.

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