Network
generic or reserved
U3575
Coolant Mixing Valve Position Sensor Circuit
Generic fault on the position sensor of the coolant mixing valve. A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number5 / 75
Possible causes
- Position sensor 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: 200–1500 €
- Estimated time: 1–4 h
- Component: coolant mixing valve position sensor
- Component: sensor wiring
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012