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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (LAN System (Can) (Except Hybrid)) >> DTC/Circuit Diagnosis >> TCM Branch Line Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK CONNECTOR

    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
      • TCM
      • Harness connector F32
      • Harness connector E2

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT

    1. Disconnect the connector of TCM.
    2. Check the resistance between the TCM harness connector terminals.
      • Except for Mexico
        TCM harness connector Resistance (Ω)
        Connector No. Terminal No.
        F89 33 23 Approx. 54 - 66

    Is the measurement value within the specification?

    YES 

    GO TO STEP 3  .

    NO 

    Repair the TCM branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the TCM. Refer to the following.

    Is the inspection result normal?

    YES (Present error) 

    Replace the TCM. Refer to the following.

    YES (Past error) 

    Error was detected in the TCM branch line.

    NO 

    Repair the power supply and the ground circuit.