Network
generic or reserved
U3014
Control Module Input Power D Circuit/Open
Open circuit on input power line D of the control module (fourth supply rail). 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 / number– / 14
Possible causes
- Supply fuse blown 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: 10–300 €
- Estimated time: 0.3–2 h
- Component: module power d
- Component: fuse
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012