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Home >> Infiniti >> 2017 >> Q50 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 175 (Automatic Transmission (Diagnostic Trouble Codes (DTCS) P0750-P2807 And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> Main Power Supply And Ground Circuit (TCM) >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK TCM POWER SOURCE (PART 1)

    1. Turn ignition switch OFF.
    2. Disconnect A/T assembly connector.
    3. Check voltage between A/T assembly harness connector terminal and ground.
      + - Condition Voltage
      (Approx.)
      A/T assembly
      Connector Terminal
      F2 2 Ground Always Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 4  .

  2. CHECK TCM POWER SOURCE (PART 2)

    Check voltage between A/T assembly harness connector terminals and ground.

    + - Condition Voltage
    (Approx.)
    A/T assembly
    Connector Terminal
    F2 1 Ground Turn ignition switch ON Battery voltage
    Turn ignition switch OFF 0 V
    6 Turn ignition switch ON Battery voltage
    Turn ignition switch OFF 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 5  .

  3. CHECK TCM GROUND CIRCUIT

    Check continuity between A/T assembly harness connector terminals and ground.

    A/T assembly - Continuity
    Connector Terminal
    F2 5 Ground Existed
    10

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Repair or replace damaged parts.

  4. DETECT MALFUNCTIONING ITEM (PART 1)

    Check the following items:

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Repair or replace damaged parts.

  5. CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY

    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between IPDM E/R harness connector terminal and A/T assembly harness connector terminals.
      IPDM E/R A/T assembly Continuity
      Connector Terminal Connector Terminal
      E123 61 F2 1 Existed
      6
    4. Also check short circuit in harness.

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace damaged parts.

  6. DETECT MALFUNCTIONING ITEM (PART 2)

    Check the following items:

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Repair or replace damaged parts.