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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (Audio, Visual, Navigation System (BOSE Audio) (With Navigation)) >> DTC/Circuit Diagnosis >> DTC U121F: Av Control Unit >> 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 AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT 

    Check AV control unit power supply and ground circuit. Refer to "AV CONTROL UNIT: DIAGNOSIS PROCEDURE ".

    Is inspection result OK? 

    YES: Inspection End.

    NO: Repair malfunctioning parts.

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