Function of Individual Components

1. Control module
Processes the incoming signals and, if necessary, triggers an alarm.

1 a. Control unit fuse
A 15 A fuse is located in the control unit between both slots which protects the control unit from short circuit at the output. If this fuse blows, the control unit functions are no longer available.

2. Alarm readiness light
Function 1
Display of the locking state.
Function 2
Display of the operating state of the alarm system.

Six display types are possible:
- Normal flashing (0.5 Hz)
- Double flashing (0.5 Hz)
- Rapid flashing (2.0 Hz)
- Rapid flashing (10.0 Hz)
- On
- Off

3. Switch for central locking
The doors can be locked and unlocked with the switch for central locking.

4. Door lock
The door locks (driver's/passenger's door) each contain 5 microswitches:
- 1 switch for priming the system (ground pulse).
- 1 switch for deactivating the system (ground pulse).
- 1 switch for recognising door closed.
- 1 switch for recognising door locked.
- 1 switch for recognising door secured.

5. Switch, rear lid
The switch connects ground to the control module.

6. Switch, front lid
The switch connects ground to the control module.

7. Switch, oddments tray
The switch connects ground to the control module when the oddments tray is opened.

8. Passenger compartment monitoring sensor and convertible top closed switch
The passenger compartment monitoring sensor connects ground to the control module when movement is detected in the vehicle. The convertible top closed switch is shown in Figure 8 behind the passenger compartment monitoring sensor. The switch connects ground to the control module. The function of the switch can be examined in the menu item Input signals under "Convertible top / sliding roof".

9. Radio alarm contact
The alarm contact on the radio mounting frame connects ground to the control module when the radio is removed from the frame.

10. Switch, convertible top compartment cover
The switch connects ground to the control module. The switch has been omitted in vehicles as from the Y-range.

11. Alarm horn
In the event of an alarm, the horn is supplied with positive potential by the control module.


NOTE: If the positive supply for the alarm horn is interrupted, the visual alarm is triggered via the direction indicator lights and the interior lights.


12. Signal converter
The signal converter obtains the transponder code from the signals sent by the transponder, and then sends this code on to the alarm system control module. With the help of Porsche System Tester 2 the transponder of a key which is inserted in the ignition can be adapted to one of the 4 memory locations for transponders. The first time the transponder is adapted, its Secret Key is programmed.
The Secret Key of the transponder can no longer be overwritten, i.e. a programmed and adapted transponder is permanently assigned to one vehicle.


13. Transponder coil
The transponder coil reads the transponder code out of the transponder.

14. Tilt sensor
The tilt sensor is located under the hood together with the alarm siren. The integrated sensor measures the tilt of the vehicle. If the change in the tilt exceeds a programmed limit value, an alarm is triggered. When the battery is removed, a valid transponder must first of all be recognised by the system. Removing the battery without a valid transponder triggers the alarm.