Service Precautions: Notes
- Turn ignition off before connecting or disconnecting any control module connectors.
- When cranking or idling engine, DO NOT disconnect ignition coil cable or spark plug cable.
- When performing an ignition spark test, check one spark plug at a time and ensure spark plug is grounded.
- When performing compression test, ensure ignition system is disabled.
- If vehicle security system is armed when vehicle battery power is disconnected, alarm will sound.
- Vehicle security system state is stored in Body Control Unit (BCU) (Discovery) or Body Electrical Control Module (BECM) (Range Rover). If vehicle security system is armed when vehicle battery power is disconnected, alarm will sound when vehicle battery power is reconnected. Before disconnecting vehicle battery power, ensure vehicle security system is not armed.
- When vehicle battery power is disconnected or remote transmitter battery is replaced, the vehicle security system remote transmitter (handset) must be resynchronized.
- If the Body Control Unit (BCU) (Discovery), Body Electrical Control Module (BECM) (Range Rover) or Engine Control Module (ECM) (all models) is replaced with a different unit, the vehicle will not start until the control modules resynchronized. The vehicle security system uses rolling code technology.
- Vehicle security system is equipped with a battery back-up feature. Before disconnecting vehicle battery power, ensure vehicle security system is not armed.
- All ignition keys are equipped with a transponder. If a replacement ignition key is needed, it may ONLY be obtained from a Land Rover or BMW dealer. If an attempt to use an ignition key with no transponder occurs, vehicle will not start.
- On Range Rover when disconnecting vehicle battery, turn ignition on, then off. Disconnect battery within 17 seconds. If battery is not disconnected within 17 seconds, vehicle alarm will sound.
- When vehicle battery power is disconnected, windows and sunroof will need to be calibrated. Radio security code must be entered for radio operation. Trip computer data will be lost.