Network
generic or reserved
U3007
Control Module Input Power B Circuit/Open
Open circuit on input power line B of the control module (second supply rail, e.g. permanent +12V vs switched battery feed).
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number– / 07
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 b
- Component: fuse
- Component: power wiring
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012