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Diagnosis Procedure - Late Production

WARNING: This page is about a different car, the 2019 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 terminals and connectors of the sonar control unit for damage, bend and loose connection (unit side and connector side).

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT 
    1. Disconnect the connector of sonar control unit.
    2. Check the resistance between the sonar control unit harness connector terminals.

      Sonar control unit harness connector

      Resistance (Ohm)

      Connector No.

      Terminal No.

      M70

      5

      6

      Approx. 54 - 66

    Is the measurement value within the specification?

    YES

    GO TO 3.

    NO

    Replace the main harness.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the sonar control unit. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    Replace the sonar control unit. Refer to Removal and Installation .

    YES

    Error was detected in the sonar control unit branch line.

    NO

    Repair the power supply and the ground circuit.

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