DTC B1412-87: Quiescent Relay Box - Missing message: Action
- Refer to the electrical circuit diagrams and check the LIN bus circuit between the Gateway Module (GWM) and the Quiescent Current Control Module (QCCM) for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
- Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new Quiescent Current Control Module (QCCM) as required