Network
generic / SAE
U0017
Medium Speed CAN Communication Bus (+) Open
The CAN-High wire of the medium-speed bus is open. Body and comfort modules drop offline; the cluster typically displays multiple comfort warnings simultaneously.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 17
Possible causes
- CAN-High wire broken in body harness 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
- Component: body control module
- MIL / check engine light
Sources
References
sae:J2012
iso:11898