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Home >> Infiniti >> 2011 >> M56 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio, Visual & Navigation System (BOSE Audio With Navigation) -- M37/M56 >> DTC/Circuit Diagnosis >> DTC U121A: Av Control Unit >> DTC Logic

DTC Logic

DTC DETECTION CONDITION CHART

DTC Display contents of CONSULT-III DTC detection condition Possible malfunction factor
U121A HDD WRITE [U121A] AV control unit malfunction is detected.
  • If the music box function has no malfunctions, then there is a possibility of the detection of a temporary malfunction.
  • Replace the AV control unit if the malfunction occurs constantly.

    Refer to "REMOVAL AND INSTALLATION ".
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