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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Transfer Case (DTC/Circuit Diagnosis) (Except 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

      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 Transfer Fluid Temperature Sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    AWD solenoid is malfunctioning. Replace Electric Controlled Coupling. Refer to Exploded View .

  3. CHECK TRANSFER FLUID TEMPERATURE SENSOR SIGNAL (2) 

    Check the voltage between AWD solenoid harness connector and ground.

    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.

      AWD Control Unit

      --

      Continuity

      Connector

      Terminal

      B17

      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.

      AWD Control Unit

      AWD solenoid

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      B17

      13

      F57

      6

      Existed

      3

      7

    4. Check the continuity between AWD Control Unit harness connector and the ground.

      AWD Control Unit

      --

      Continuity

      Connector

      Terminal

      B17

      13

      Ground

      Not existed

      3

    Is the inspection result normal?

    YES

    GO TO 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.