P0686-11: ECM/PCM Power Relay Control Circuit Low - Circuit short to ground: Action
- Refer to the electrical circuit diagrams and check engine management system relay power and ground circuits for open circuit
- Refer to the electrical circuit diagrams and check the engine management system relay circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress and pins for damage and/or corrosion
- Install a new engine management system relay, only when diagnosed as failed
- Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Codes and retest