DTC B1005 Hummer
MICU Lost Communication with Relay Control Module (RM Message)
MICU Lost Communication with Relay Control Module (RM Message)
Description
PCM or F-CAN loss of communication, B-CAN system loss of communication. NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis Test Mode A.
Cause and Solution
Faulty battery or charging system
PCM or F-CAN poor connections or loose pins at connectors
B-CAN system poor connections or loose pins at connectors
Faulty relay control module
Video Guide
Diagnostic Info
- DTC Code: B1005
- Brand: Hummer