Network
generic / SAE
U0036
Vehicle Communication Bus A (-) shorted to Bus A (+)
The two lines of differential bus A are shorted together. Communication impossible — both lines see the same voltage.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 36
Possible causes
- CAN-H/CAN-L shorted together 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: 100–1500 €
- Estimated time: 1–6 h
- Component: bus a wiring
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012