LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2011 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 51 (Audio System, Visual System & Navigation System (BOSE Audio With Navigation) -- G37 Convertible) >> DTC/Circuit Diagnosis >> DTC U121B: Av Control Unit >> DTC Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Logic

WARNING: This page is about a different variant/trim than selected.
DTC LOGIC CHART

DTC Display contents of CONSULT-III DTC detection condition Possible malfunction factor
U121B HDD COMM [U121B] 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 "EXPLODED VIEW ".
scientia non olet · About LEMON Manuals