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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can System (DTC/Circuit Diagnosis) >> Circuit Diagnosis >> RDR-R 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 side radar RH 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 RIGHT/LEFT SWITCHING SIGNAL CIRCUIT 

    Check the right/left switching signal circuit of the side radar RH. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    >>

    GO TO 3.

    >>

    Repair the root cause.

  3. CHECK HARNESS FOR OPEN CIRCUIT 
    1. Disconnect the connector of side radar RH.
    2. Check the resistance between the side radar RH harness connector terminals.
      Side radar RH harness connector Resistance (Ω)
      Connector No. Terminal No.
      M253 6 7 Approx. 54 - 66

    Is the measurement value within the specification?

    >>

    GO TO 4.

    >>

    Repair the side radar RH branch line.

  4. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the side radar RH. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    >>

    Replace the side radar RH. Refer to Removal and Installation .

    >>

    Error was detected in the side radar RH branch line.

    >>

    Repair the power supply and the ground circuit.

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