DTC U128D (Keyless Access Backup Control Unit): Notes
DTC U128D : Backup Control Unit (Body Control Module) Lost Communication with Gauge Control Module
How To Use This Service Information .
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
- According to the detected DTC (s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the body control module.
- Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.
- Before you troubleshoot, review the How to Troubleshoot - Refer to: How to Troubleshoot the Body Electrical (2019 2020 2021) or How to Troubleshoot the Body Electrical (2022 2023) .