LEMON Manuals: Even more car manuals for everyone
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 U121B: Av Control Unit >> DTC Logic

DTC Logic

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.
DTC Display contents of CONSULT DTC Detection Condition Action to take
U121B HDD-COMM [U121B] Internal malfunction of AV control unit (HDD communication error) is detected. Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".
scientia non olet · About LEMON Manuals