Network
generic or reserved
U3511
High Voltage System Interlock Circuit B
Generic fault on the second high-voltage interlock loop (HVIL) circuit. The interlock detects whether HV connectors are properly mated; an open loop forces the HV system into a safe state.
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number5 / 11
Possible causes
- HV connector not fully mated high
- Interlock pilot pin damaged medium
- Gateway module routing CAN messages incorrectly 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: 100–2000 €
- Estimated time: 1–5 h
- Component: hvil loop b
- Component: hv connectors
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012