Backup Control Unit
BACKUP CONTROL UNIT DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description | DTC type |
|---|---|---|
| B1926 | Backup control antenna open or short | Internal error |
| B1931 | Backup control unit no response | Signal error |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U128D - Refer to: DTC Troubleshooting: U128D (Keyless Access Backup Control Unit: 6-Speed A/T) (2016 2017 2018) or DTC Troubleshooting: U128D (Keyless Access Backup Control Unit) (2019 2020 2021) or DTC Troubleshooting: U128D (Keyless Access Backup Control Unit: 9-Speed A/T) (2016 2017 2018) . |
Backup control unit lost communication with gauge control module | Loss of communication |