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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Audio, Visual & Navigation System) >> DTC/Circuit Diagnosis >> DTC U121C: Av Control Unit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MUSIC BOX FUNCTION

    Is music box function normal? 

    YES: Malfunction may be detected transitory.

    NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

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