DTC U1281, U128D (Adaptive Front Lighting Control Unit): Notes

DTC U1281 : Lost Communication with MICU/BCM (Body Control Module)

DTC U128D : Lost Communication with Gauge Control Module

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 adaptive front lighting control unit.
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) .