Network
generic or reserved
U3519
High Voltage System Interlock Circuit D
Generic fault on HVIL loop D. 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 / 19
Possible causes
- HV connector not fully mated 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: 100–2000 €
- Estimated time: 1–5 h
- Component: hvil loop d
- Component: hv connectors
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012