Network
generic or reserved
U350F
Control Module Cooling Fan Circuit Range/Performance
Module cooling fan circuit electrically OK but fan does not run as commanded — bearing seized, blade obstructed, or driver weak.
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number5 / 0F
Possible causes
- Fan motor seized 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: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.5–3 h
- Component: module cooling fan
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012