Part 1

Alarm system I32; 148

Control module function

Activating and deactivating alarm system
The alarm system is activated by a ground signal at the activation input or by an activation signal from the hand-held transmitter.

The activation of the system is ignored if pin 86 S, pin 15 or a valid transponder key is recognised.

If for some reason it is not possible to lock the central locking system with a single locking command, the alarm system is not activated. Activation of the alarm system cannot be achieved until the central locking system is locked (manually, if necessary) and a new activation command is issued or locking is only performed three times in quick succession. The interval between two locking operations must not be more than 1 second in this case. If the system is activated by this emergency function, the central locking system is locked without checking whether it can be completely locked.

The system saves the type of activation in a status memory. If an alarm is triggered, this information is written into the alarm memory together with the alarm coding.

When the alarm system is activated, the inactive level of all input is checked for an inactive period of 10 seconds. Only inputs which are inactive for the entire inactive period can trigger the alarm after the end of the inactive period. All other inputs are blocked for alarm triggering for as long as they are in the active state. If the inactive state occurs at blocked inputs, the inactive period is started for them individually. All inputs which remain in the inactive state during the inactive period are then included in the alarm evaluation.

The inactive period commences immediately after activation if:
- it is apparent that the central locking system is locked or if locking occurred three times in succession.
- the "Activate" signal is no longer present. (A second activation command for cancelling the anti-theft protection restarts the inactive period.)

In the case of an active signal at the inputs to pin 86 S, pin 15 or if a valid transponder key is recognised, no activation is possible. If one of these inputs is active at the time of locking, the central locking system cannot be activated. The central locking system is opened if one of these inputs becomes active during the inactive period, since in this case the alarm system is also deactivated.

If, when the vehicle is locked, a door is unlocked after the 10-second inactive period, this is immediately set to "closed". An alarm is triggered at the same time. If, when the vehicle is locked, a door is unlocked from the inside during the inactive period, the central locking system is unlocked and the alarm system is deactivated. (Protection against unintentional locking/activation).

If, within 15 seconds of switching on the "External Electronics" output, movements in the vehicle are detected by the passenger compartment monitoring sensor, the central locking system is set to the locked position and the alarm system is deactivated.

After the inactive period, the "External Electronics" output is switched on if the alarm-triggering inputs such as doors, convertible top, convertible top compartment cover, front luggage compartment and rear engine compartment were inactive for the entire inactive period. If one of these inputs is active, the "External Electronics" output is not switched on until this input becomes inactive and remains in this state for at least 10 seconds. The active "External Electronics" output cannot be deactivated again by activating one of the above inputs. The output is switched off when deactivation takes place.

If, within a period of less than 1 second after the first activation pulse, a second activation command is issued, the "External Electronics" output is not switched on for one activation cycle. In this case, the central locking system is not secured, but only locked. This is acknowledged by signal 1 at the alarm horn and direction indicator light output, as well as during the deactivation period by the display type 3 at the alarm readiness display output and at the display output "Door locked". An opening command deletes the switch-off command.

If activation occurs by means of the emergency function (locking 3 times in quick succession), the "External Electronics" output is not switched on for this activation cycle. This is acknowledged by signal 1 at the alarm horn and direction indicator light outputs, as well as by display type 2 at the alarm readiness display output. A deactivation command deletes this command.

If pin 86 S, pin 15 or a valid transponder key is recognised during the inactive period, the alarm system is deactivated (protection against unintentional activation). The central locking system is opened in this case.

A system self-test is carried out upon activation. The result of this test is acknowledged via the alarm readiness light and the display "Door locked" and can be called up from the status memory via the diagnosis function. Equipment faults are written into the fault memory. Faults are indicated at the alarm horn and direction indicator light outputs by signal 2.

The alarm system is deactivated by a ground signal at the "Deactivate" input or by a deactivation signal from the hand-held transmitter. If a valid transponder key is recognised, the alarm system is also deactivated.

Alarm triggering and alarm output
The alarm functions can be triggered only in the primed state. A non-blocked alarm input triggers an alarm in the primed state with an active signal. The alarm-triggering input then remains blocked for further alarm triggering until it returns to the inactive state. Then, following an inactive period of 10 seconds, it is again included in the alarm evaluation, provided that it was inactive for the entire inactive period.

In a priming cycle, the inputs Passenger compartment monitor, External 1 trigger a maximum of three alarms.

The alarm output is via:







The alarm output with all associated actions is interrupted immediately in the event of deactivation.

Learning function

Immobiliser
The immobiliser code can be entered under the "Learning functions" menu item in the I48 function selection after the alarm system control module is replaced.

CAUTION:
The immobiliser code cannot be deleted or changed again. An incorrect Input will render the control module useless.
Enter and check immobiliser code carefully.

Transponder key
A new transponder can be adapted for the vehicle under the 'Learning functions/transponder key' menu item. The old transponders can be adapted to the new control module after the alarm system control module is replaced and the immobiliser code is entered.

Remote control
Up to four remote controls can be adapted to the control module under the 'Learning functions/remote control' menu item. The old remote controls can be adapted to the new control module after replacing the alarm system control module and entering the immobiliser code.

Reading out remote controls
Under the menu item 'Reading out remote controls', the data for the remote controls can be read out after the alarm system control module is replaced. If it is not possible to read out and transfer the remote controls (e.g. no communication with the control module), the old remote controls can be adapted to the new control module (teaching hand-held transmitter).

Transferring remote controls
Under the menu item 'Transfer remote controls', the data read out from the remote controls can be transferred into the new control module.

Coding

Four functions are available for selection under the 'Coding' menu item:
- Country coding
- Version coding
- Vehicle re-locking
- Alarm siren/tilt sensor

Country coding
The country in which the vehicle is used as well as the vehicle model (sliding roof, Cabrio) can be coded using the Porsche System Tester II No. 9588.
The type of alarm output and its duration depend on the country codes.

Allocation of country coding

Allocation Of Country Coding (Part 1):

Allocation Of Country Coding (Part 2):

Allocation Of Country Coding (Part 3):

Allocation Of Country Coding (Part 4):

Allocation Of Country Coding (Part 5):

Allocation Of Country Coding (Part 6):

Allocation Of Country Coding (Part 7):

Allocation Of Country Coding (Part 8):

Version coding
Four versions are available for selection under the 'Version coding' menu item.

Version 1
The doors are locked automatically as soon as the ignition is switched on.

Version 2
The doors are locked automatically if the vehicle exceeds a limit speed of 5 km/h.

Version 3
The doors are locked automatically as soon as the ignition is switched on. If the doors are opened while the engine is running, automatic re-locking takes place if the vehicle exceeds a limit speed of 5 km/h.

Version 4
The doors are not locked automatically.

NOTE: Automatically locked doors can be opened by pressing the central locking button (central locking switch) or by pulling on the door handle twice.

Crash signal
The airbag control module emits a signal to the alarm system control module no later than 35 seconds after pin 86 S is switched on and until pin 86 S is switched off again. This signal has a frequency of 10 Hz and indicates two states, namely:
- Normal state (live signal)
- Crash state

The two states differ in the pulse/duty ratio of the signal:







Signal evaluation begins 45 seconds after pin 86 S is switched on. If no signal is detected from the airbag control module, a corresponding fault is entered in the fault memory.

Power window control
The alarm system control module not only enables power-window control, but also controls the comfort functions. If the central locking button on the hand-held transmitter is still pressed after an unlocking command has been given, the windows are open. In the case of a locking command using the central locking button on the hand-held transmitter (if the button is still pressed), the windows are closed (country variant).

Reading out and transferring remote control

General
When replacing the alarm system control module, it is possible to read out remote controls from the old control module and transfer them to the new control module. In this way, the hand-held transmitters (remote controls and transponders) can be retained. In other words, it is not necessary to change the hand-held transmitter when replacing the alarm system control module.

Requirements
- Communication can be established between the Porsche System Tester II No. 9588 and the alarm system control module.
- The remote controls and transponders are correct and functional.

NOTE:
- When the remote control is read out and transferred, only the remote control data is read out and transferred.
- The transponder of the individual keys must be adapted to the control module. Four positions are available for this purpose in the "Transponder key" menu item. This function is described from step 19 onward.

Work preparation
The following information is required from the IPAS for reading out and transferring remote controls:
- Key learning code
- Immobiliser code

Procedure
1. Connect the Porsche System Tester II No. 9588 to the diagnostic socket, start it and switch on the ignition.
2. Select vehicle type Boxster (986) and start the automatic control module search using the double arrow [>>] key.
3. After a brief search, the Porsche System Tester II No. 9588 reports: "Fault memory reading completed".
4. Select alarm system control module and press the double arrow [>>] key.
5. Select "Learning functions" in the menu and press the double arrow [>>] key.
6. Select the menu item "Read out remote control" and press the double arrow [>>] key.
7. "Input key learning code" appears on the screen. Enter the key learning code using the arrow keys [up arrow] and [down arrow] and press the double arrow [>>] key.
8. "Please confirm input" appears on the screen. Check the key learning code you entered and press the [F7] key.
9. "Remote controls were read out" appears on the screen. Press the double arrow key [<<] twice to change to the control module overview. Switch the ignition off, remove the old control module, install the new control module and switch the ignition on again.
10. Press the double arrow key [>>] to establish communication with the new control module.
11. Select the "Learning functions" menu item with the arrow key [down arrow] and press the double arrow key [>>].
12. The "Immobiliser" menu item is already selected. Press the double arrow key [>>].

CAUTION:
The immobiliser code can be entered only once.
An incorrect entry will render the control module useless.
- Enter and check immobiliser code carefully.

13. "Input immobiliser code" appears on the screen. Enter the immobiliser code using the arrow keys [up arrow] and [down arrow] and press the double arrow key [>>].
14. "Please confirm input" appears on the screen. Check the immobiliser code you entered and press the [F7] key.
15. Select the "Transfer remote control" menu item with the arrow key [down arrow] and press the double arrow key [>>].
16. "Input key learning code" appears on the screen. Enter the key learning code using the arrow keys [up arrow] and [down arrow] and press the double arrow key [>>].
17. "Please confirm input" appears on the screen. Check the key learning code you entered and press the [F7] key.
18. "Remote controls were transferred" appears on the screen.
19. Select the "Transponder key" menu item with the arrow key [up arrow] and press the double arrow key [>>].
20. "Input key learning code" appears on the screen. Enter the key learning code using the arrow keys [up arrow] and [down arrow] and press the double arrow key [>>].
21. "Please confirm input" appears on the screen. Check the key learning code you entered and press the [F7] key.

NOTE: As the transponder coils must be taught individually, make sure that the allocation of the positions is the same as described under "Transponder code" on the IPAS printout (see step 22).

22. Four unoccupied positions are displayed on the screen. Position 1 is marked in black. Furthermore, the current transponder code is displayed under "Current key". This code must be stored in the same position as specified in the IPAS printout. Select position and press the [F8] key. The position is occupied with the corresponding transponder code.
23. Withdraw the key and repeat steps 19 to 22 for the remaining keys.

All remote controls have now been transferred from the old control module to the new control module, and the transponders adapted to the new control module.
- Check that all hand-held transmitters function correctly (lock and unlock vehicle).
- Check that all transponders function correctly (start engine).
- Read out fault memory and delete any stored faults.

Radio remote control
If a command is issued via the hand-held transmitter, this is acknowledged with display type 4 at the alarm readiness display for the duration of the operation.

Commands triggered and correctly executed via the hand-held transmitter are acknowledged as follows at the output for the direction indicator lights:
- Secure with signal 2
- Lock with signal 3
- Unlock with signal 1

Depending on the country, the checkback signal can be programmed using the Porsche System Tester II No. 9588.

All other functions such as interior light control are controlled in the same way as with the vehicle key.

If operating commands are simultaneously present from the handheld transmitter and the door lock barrels, the signal recognised first has priority.