LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can System (DTC/Circuit Diagnosis) >> Circuit Diagnosis >> ADP 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 following terminals and connectors for damage, bend and loose connection (unit side and connector side).
      • Driver seat control unit
      • Harness connector M550
      • Harness connector M249

    Is the inspection result normal?

    >>

    GO TO 2.

    >>

    Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT 
    1. Disconnect the connector of driver seat control unit.
    2. Check the resistance between the driver seat control unit harness connector terminals.
      Driver seat control unit harness connector Resistance (Ω)
      Connector No. Terminal No.
      M552 16 32 Approx. 54 - 66

    Is the measurement value within the specification?

    >>

    GO TO 3.

    >>

    Repair the driver seat control unit branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

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

    Is the inspection result normal?

    >>

    Replace the driver seat control unit. Refer to Removal and Installation .

    >>

    Error was detected in the driver seat control unit branch line.

    >>

    Repair the power supply and the ground circuit.

scientia non olet · About LEMON Manuals