DTC B1412-87: Quiescent Relay Box - Missing message: Action
- Refer to the appropriate system wiring diagrams and check the LIN bus circuit between the gateway module and the quiescent current control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuit as required. Clear the DTCs and retest
- If the fault persists, install a new quiescent current control module as required