DTC Troubleshooting: U1291 (Power Distribution Module): Notes
DTC U1291 : Semiconductor Fuse Relay Module Lost Communication with Relay 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 power distribution 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 (2022 - 2023) or How to Troubleshoot the Body Electrical (2019 - 2021) .