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Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Can System) >> Can >> DTC/Circuit Diagnosis >> Main Line Between RDR-R And RDR-L Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan Armada and 2018 Nissan Armada. 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 (connector side and harness side).
      • Harness connector B239
      • Harness connector B63

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Repair the terminal and connector.

  2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 
    1. Disconnect the following harness connectors.
      • Side radar RH
      • Harness connectors B239 and B63
    2. Check the continuity between the side radar RH harness connector and the harness connector.

      Side radar RH harness connector

      Harness connector

      Continuity

      Connector No.

      Terminal No.

      Connector No.

      Terminal No.

      B243

      4

      B239

      7

      Existed

      3

      3

      Existed

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair the main line between the side radar RH and the harness connector B239.

  3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 
    1. Disconnect the connector of side radar LH.
    2. Check the continuity between the harness connector and the side radar LH harness connector.

      Harness connector

      Side radar LH harness connector

      Continuity

      Connector No.

      Terminal No.

      Connector No.

      Terminal No.

      B63

      7

      B74

      4

      Existed

      3

      3

      Existed

    Is the inspection result normal?

    YES

    Check CAN system type decision again.

    YES

    Error was detected in the main line between the side radar RH and the side radar LH.

    NO

    Repair the main line between the harness connector B63 and the side radar LH.