Programming and Relearning
Control module function (coding/programming), airbagInternal function test
NOTE: The airbag system of the Cayenne includes a system check, which runs in the background and is activated when the ignition is switched on. In comparison to other model ranges, the airbag warning light remains on after the system check is complete (only if the ignition is still on and the engine is not started) and only goes out again when the engine is started and no faults are detected in the airbag system.
When the ignition (terminal 15) is switched on, a control phase is run in order to check the activation/deactivation of the passenger's airbag ignition circuit, including the airbag switch and the indicator light (passenger's airbag OFF display). This control phase is evident by the fact that the indicator light lights up for approx. four seconds (but not when the airbag switch is OFF, i.e. the passenger's airbag is deactivated). If implausible statuses are detected in the passenger's airbag ignition circuit, the indicator light starts flashing and the airbag warning light may also come on. If such a situation arises, read out the fault memory and work through the diagnosis/troubleshooting instructions.
Drive link test
WARNING:
Danger of personal injury if the drive link test is carried out when the vehicle is in motion.
- Never carry out the drive link test when the vehicle is in motion.
The following conditions must be observed when carrying out the drive link test:
- The drive link test must always be carried out on a stationary vehicle in a workshop with sufficient commercially available tools. The left front seat must then be partially removed in order to deactivate the disconnecting relay again.
The airbag triggering unit includes a drive link test, which can be activated using the 9588 Porsche System Tester II. The following functions are performed:
- The disconnecting relay is triggered (i.e. partial battery interruption present).
- Central locking unlocks all five doors.
- Interior lighting comes on.
- The hazard warning lights come on.
For vehicles with V8 engine and automatic transmission, model year '03 and '04:
- The vehicle engine is switched off (DME control module interrupts ignition and fuel feed).
NOTE:
- The ignition (terminal 15) can still be switched on again after this drive link test.
- However, the engine cannot be started until the disconnecting relay is deactivated again.
- For vehicles with V8 engine and automatic transmission, model year '03 and '04: fault code P1266 and/or P1620 is triggered in the DME control module.
Procedure:
1. Connect battery charger (see --> chapter "Commercially available battery charging device" in 69-2)
NOTE:
- The following conditions must be satisfied in order to carry out the drive link test:
- Move selector lever to position 'P' or 'N', or leave vehicle out of gear.
- Parking brake on.
- Hazard warning lights off.
- All doors closed and locked.
- Interior lighting off.
- For vehicles with V8 engine and automatic transmission, model year '03 and '04: Engine idling.
2. Using the 9588 Porsche System Tester II, select the menu item 'Drive link test' in the airbag system.
3. Press the [F8] key ('Start').
4. Press the [F8] key ('Start') again.
NOTE:
- The disconnecting relay is triggered (i.e. partial battery interruption present).
- Central locking unlocks all five doors.
- Interior lighting comes on.
- The hazard warning lights come on.
- For vehicles with V8 engine and automatic transmission, model year '03 and '04: The engine is switched off.
5. Press the [>>] key ('Continue').
6. Press to [<<] return to the menu.
7. For vehicles with V8 engine and automatic transmission, model year '03 and '04: read out DME fault memory with the 9588 Porsche System Tester II and erase any faults recorded by the drive link test (see --> Rep. Gr. 2470; DME diagnosis).
Locking
The 'Lock' function is used to adjust the airbag system according to the existing components and required data records in order to achieve full functionality.
DANGER:
Danger of personal injury if airbag triggering unit is not locked.
In the event of an accident/triggering event, the airbags cannot be triggered.
- Lock new airbag triggering units immediately after installation in the vehicle.
- Only start the vehicle if the airbag triggering unit has been locked beforehand.
An unlocked triggering unit can be locked under the menu item "Lock". When the airbag triggering unit is replaced, the new airbag triggering unit must be locked.
NOTE:
- The airbag triggering unit is delivered from the Parts Service dealers in an unlocked state.
- If an airbag triggering unit is unlocked, the airbag warning light flashes. The airbag triggering unit must then be locked.
- A locked airbag triggering unit cannot be unlocked or locked again.
Procedure:
1. Connect battery charger (see --> chapter "Commercially available battery charging device" in 69-2)
2. Using the 9588 Porsche System Tester II, select the menu item 'Lock'.
NOTE: If the airbag triggering unit was already locked, the message 'Control unit already locked' appears.
3. Start the locking process with the [F8] key ('Write').
4. Check whether an 'Airbag Off switch' is installed.
5. Select the correct vehicle type 'without Airbag Off switch' or 'with Airbag Off switch' using the keys [Upper arrow] and [Lower arrow] and confirm with the [>>] key.
6. Wait until the message 'Locking control unit.' appears and disappears again.
7. Switch off the ignition.
8. Switch on ignition.
9. Press the [<<] key to return to the menu and erase the fault memory.