LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2013 >> QX56 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (LAN System (Can)) >> DTC/Circuit Diagnosis >> Main Line Between RDR-R And APA Circuit >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. 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 B201
      • Harness connector M117
      • Harness connector M20 and PCB harness side connector

      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 B201 and M117
    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.
      B252 4 B201 66 Existed
      3 67 Existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair the main line between the side radar RH and the harness connector B201.

  3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 
    1. Disconnect the harness connector M20.
    2. Check the continuity between the harness connectors.
      Harness connector Harness connector Continuity
      Connector No. Terminal No. Connector No. Terminal No.
      M117 66 M20 38 Existed
      67 40 Existed

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair the main line between the harness connectors M117 and M20.

  4. CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 
    1. Disconnect the harness connectors M150 and M151.
    2. Check the continuity between the PCB harness connector and the harness connector.
      PCB harness connector Harness connector Continuity
      Terminal No. Connector No. Terminal No.
      38 M150 11 Existed
      40 10 Existed

      Is the inspection result normal? 

      YES (Present error): Check CAN system type decision again.

      YES (Past error): Error was detected in the main line between the side radar RH and the accelerator pedal actuator.

      NO: Replace the PCB harness.

scientia non olet · About LEMON Manuals