Network
generic or reserved
U3568
Anode Multifunction Valve Control Circuit
Generic electrical fault on the anode multifunction valve. This valve combines shut-off, pressure regulation and recirculation control on the hydrogen side.
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number5 / 68
Possible causes
- Valve actuator failed 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: 400–3000 €
- Estimated time: 2–6 h
- Component: anode multifunction valve
- Component: valve wiring
- MIL / check engine light
- drive cycle required
- limp mode possible
Sources
References
sae:J2012