Network
generic / SAE
U0143
Lost Communication with Body Control Module C
A third body control module (BCM "C") has dropped off the bus. Comfort, lighting or door functions on the affected zone stop working.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 43
Possible causes
- BCM C unpowered high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 80–1200 €
- Estimated time: 0.5–5 h
- Component: body control module
- Component: can bus wiring
- MIL / check engine light
Sources
References
sae:J2012