Voltmeter at plug I pin 10 and ground.
Display: 0 Volts
Test Point 9
TEST POINT 9
Central Lock Button Open/Closed, Short To B+
Fault Code 09
Fault Effect: No central locking or unlocking possible
Procedure
1. Pull plug I off the alarm system control module.
2. Check the switch for central locking.
Voltmeter at plug I, pin 29 and ground.
- Switch for central locking not actuated.
Display: 0 Volts
- Switch for central locking actuated towards "Closed".
Display: Battery voltage
Voltmeter at plug I, pin 10 and ground.
- Switch for central locking not actuated.
Display: 0 Volts
- Switch for central locking actuated towards "Open".
Display: Battery voltage
3. Disconnect the plug connection at the central locking button.
4. Check the leads from the alarm system control module to the central locking button for short to B+.
- Voltmeter at plug I, pin 29 and ground.
Display: 0 Volts
- Voltmeter at plug I, pin 10 and ground
Display: 0 Volts
Test Point 10
TEST POINT 10
Voltage Failure At Terminal 30 With Alarm System Active
Fault Code 10
Fault Effect: Alarm system/central locking system without function
Procedure
1. Check battery.
2. Check the power supply of the alarm system control module.
Voltmeter at alarm system control module plug II, pin 1 (negative) and pin 7 (positive).