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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 P1826: Transfer Fluid Temperature >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK TRANSFER FLUID TEMPERATURE SENSOR SIGNAL (1)
    1. Turn the ignition switch OFF.
    2. Disconnect AWD solenoid harness connector.
    3. Turn the ignition switch ON.
    4. Check the voltage between AWD solenoid harness connector terminals.
    TERMINALS VOLTAGE REFERENCE CHART

    AWD solenoid Voltage (Approx.)
    Connector Terminal
    F57 6 7 2.5 V

    Is the inspection result normal? 

    YES: Go to 2.

    NO: Go to  3.

  2. CHECK TRANSFER FLUID TEMPERATURE SENSOR

    Check the resistance between transfer fluid temperature sensor harness connector terminals. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Go to  6.

    NO: Replace transfer fluid temperature sensor. Refer to "EXPLODED VIEW ".

  3. CHECK TRANSFER FLUID TEMPERATURE SENSOR SIGNAL (2)

    Check the voltage between AWD solenoid harness connector and ground.

    TERMINALS VOLTAGE REFERENCE CHART

    AWD solenoid - Voltage (Approx.)
    Connector Terminal
    F57 6 Ground 2.5 V

    Is the inspection result normal? 

    YES: Go to 4.

    NO: Go to  5.

  4. CHECK AWD CONTROL UNIT GROUND
    1. Turn the ignition switch OFF.
    2. Disconnect AWD control unit harness connector.
    3. 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 5.

    NO: Repair or replace error-detected parts.

  5. CHECK TRANSFER FLUID TEMPERATURE SENSOR CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect AWD control unit harness connector.
    3. 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 13 F57 6 Existed
      3 7
    4. Check the continuity between AWD control unit harness connector and the ground.
      TERMINALS CONTINUITY REFERENCE CHART

      AWD control unit - Continuity
      Connector Terminal
      F108 13 Ground Not existed
      3

    Is the inspection result normal? 

    YES: Go to 6.

    NO: Repair or replace error-detected parts.

  6. CHECK TERMINALS AND HARNESS CONNECTORS
    1. Check AWD control unit pin terminals for damage or loose connection with harness connector.
    2. Check transfer fluid temperature sensor 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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