Possible causes, elimination, Notes
- Pull off plug I on the alarm control module.
- Check the central locking button.
- Voltmeter at plug I pin 29 and ground.
Central locking button not actuated.
Display: 0 V
Central locking button actuated towards "Closed".
Display: Battery voltage.
- Voltmeter at plug I pin 10 and ground.
Central locking button not actuated.
Display: 0 V
Central locking button actuated towards "Open".
Display: Battery voltage
- Voltmeter at plug I pin 29 and ground.
- Disconnect the plug connection at the central locking button.
- Check the leads from the alarm control module to the central locking button for short to B+.
- Voltmeter at plug I pin 29 and ground.
Display: 0 V
Voltmeter at plug I pin 10 and ground.
Display: 0 V
- Voltmeter at plug I pin 29 and ground.