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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 892 (LAN System (Can)) >> DTC/Circuit Diagnosis >> Av Branch Line Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 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 terminals and connectors of the AV 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 AV control unit.
    2. Check the resistance between the AV control unit harness connector terminals.
      • Models with base audio
        AV control unit harness connector Resistance (Ω)
        Connector No. Terminal No.
        M46 86 87 Approx. 54 - 66
      • Models with BOSE audio system with navigation
        AV control unit harness connector Resistance (Ω)
        Connector No. Terminal No.
        M165 78 62 Approx. 54 - 66
      • Models with BOSE audio system without navigation
        AV control unit harness connector Resistance (Ω)
        Connector No. Terminal No.
        M166 86 87 Approx. 54 - 66

      Is the measurement value within the specification? 

      YES: GO TO 3.

      NO: Repair the AV control unit branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the AV control unit. Refer to the following.

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