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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 >> 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.
      AWD solenoid Voltage
      (Approx.)
      Connector Terminal
      F48 6 7 2.5 V

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 3  .

  2. CHECK TRANSFER FLUID TEMPERATURE SENSOR

    Check transfer fluid temperature sensor. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 6. 

    NO 

    Transfer fluid temperature sensor is malfunctioning. Replace electric controlled coupling. Refer to DISASSEMBLY  and ASSEMBLY .

  3. CHECK TRANSFER FLUID TEMPERATURE SENSOR SIGNAL (2)

    Check the voltage between AWD solenoid harness connector and ground.

    AWD solenoid - Voltage
    (Approx.)
    Connector Terminal
    F48 6 Ground 2.5 V

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 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.
      AWD control unit - Continuity
      Connector Terminal
      M42 10 Ground Existed
      11

    Is the inspection result normal?

    YES 

    GO TO STEP 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.
      AWD control unit AWD solenoid Continuity
      Connector Terminal Connector Terminal
      M42 13 F48 6 Existed
      3 7
    4. Check the continuity between AWD control unit harness connector and the ground.
      AWD control unit - Continuity
      Connector Terminal
      M42 13 Ground Not existed
      3

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace error-detected parts.

  6. CHECK TERMINALS AND HARNESS CONNECTORS

    • Check AWD control unit pin terminals for damage or loose connection with harness connector.
    • 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 REMOVAL AND INSTALLATION .

    NO 

    Repair or replace error-detected parts.

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