DTC U128D (Relay Control Module): Notes
DTC U128D : Relay control module lost communication with gauge control module (VSP/NE frame)
NOTE:
Before you troubleshoot, review the How to Troubleshoot .
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 1 and Test Mode 2 (without the HDS) or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating .
- DTC may be stored if gauge control module does not start normally.
- DTC may be stored due to the power/ground circuit failure of the gauge control module. Before this troubleshooting, check the power/ground circuit of the gauge control module first.