DTC Troubleshooting: U0100 (Body Control Module): Notes
DTC U0100 : BCM Lost Communication With ECM/PCM
How To Use This service 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 PCM Does Not Start Normally.
- DTC May Be Stored Due To The Power/Ground Circuit Failure Of The PCM. Before This Troubleshooting, Check The Power/Ground Circuit Of The PCM First.