DTC Troubleshooting: U1291 (Body Control Module): Notes

DTC U1291  : BCM lost communication with relay control module

How to use this information .

NOTICE: 

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 B - Control Unit Not Communicating or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
• DTC may be stored if relay control module does not start normally.
• DTC may be stored due to the power/ground circuit failure of the relay control module. Before this troubleshooting, check the power/ground circuit of the relay control module first.