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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can System (DTC/Circuit Diagnosis) >> Circuit Diagnosis >> E-Shift Branch Line Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the terminals and connectors of the electric shift control module for damage, bend and loose connection (unit side and connector side).

    Is the inspection result normal?

    >>

    GO TO 2.

    >>

    Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT 
    1. Disconnect the connector of electric shift control module.
    2. Check the resistance between the electric shift control module harness connector terminals.
      Electric shift control module harness connector Resistance (Ω)
      Connector No. Terminal No.
      M241 31 32 Approx. 54 - 66

    Is the measurement value within the specification?

    >>

    GO TO 3.

    >>

    Repair the electric shift control module branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the electric shift control module. Refer to Wiring diagram .

    Is the inspection result normal?

    >>

    Replace the electric shift control module. Refer to Removal and Installation .

    >>

    Error was detected in the electric shift control module branch line.

    >>

    Repair the power supply and the ground circuit.

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