Network
generic / SAE
U0018
Medium Speed CAN Communication Bus (+) Low
CAN-High on the medium-speed bus is shorted to ground. The differential pair cannot work, all body and comfort nodes drop offline at the same time.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 18
Possible causes
- CAN-High shorted to ground 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: 60–500 €
- Estimated time: 0.8–4 h
- Component: can high wire
- MIL / check engine light
Sources
References
sae:J2012
iso:11898