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Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 66 (Transfer Case -- G37 Coupe) >> DTC/Circuit Diagnosis >> DTC C1204: AWD Solenoid >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK AWD SOLENOID POWER SUPPLY
    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.
    TERMINALS VOLTAGE REFERENCE CHART

    AWD control unit - Voltage
    Connector Terminal
    F108 9 Ground Battery voltage

    Is the inspection result normal? 

    YES: Go to 2.

    NO: Perform the trouble diagnosis for power supply circuit. Refer to "DIAGNOSIS PROCEDURE ".

  2. CHECK AWD CONTROL UNIT GROUND

    Check the continuity between AWD control unit harness connector and ground.

    TERMINALS CONTINUITY REFERENCE CHART

    AWD control unit - Continuity
    Connector Terminal
    F108 10 Ground Existed
    11

    Is the inspection result normal? 

    YES: Go to 3.

    NO: Repair or replace error-detected parts.

  3. CHECK AWD SOLENOID CIRCUIT
    1. Disconnect AWD solenoid harness connector.
    2. Check the continuity between AWD control unit harness connector and AWD solenoid harness connector.
      TERMINALS CONTINUITY REFERENCE CHART

      AWD control unit AWD solenoid Continuity
      Connector Terminal Connector Terminal
      F108 1 F57 1 Existed
      2 2
    3. Check the continuity between AWD control unit harness connector and the ground.
    TERMINALS CONTINUITY REFERENCE CHART

    AWD control unit - Continuity
    Connector Terminal
    F108 1 Ground Not existed
    2

    Is the inspection result normal? 

    YES: Go to 4.

    NO: Repair or replace error-detected parts.

  4. CHECK AWD SOLENOID

    Check the resistance between AWD solenoid harness connector terminals. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Go to 5.

    NO: AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to "EXPLODED VIEW ".

  5. CHECK TERMINALS AND HARNESS CONNECTORS
    1. Check AWD control unit pin terminals for damage or loose connection with harness connector.
    2. Check AWD solenoid pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal? 

    YES: Replace AWD control unit. Refer to "EXPLODED VIEW ".

    NO: Repair or replace error-detected parts.

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