DTC Logic
WARNING: This page is about a different car, the 2010 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION CHART
| DTC | Display contents of CONSULT-III | 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 ". |