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Air Bag Control Module: Service and Repair



Removing And Installing Triggering Unit For Airbag

Tools







Technical Values







Preliminary work

Preliminary work for triggering unit

INFORMATION: If a new control unit has to be installed, read out as much of the data from the old control unit as possible using the PIWIS Tester 9718.

1. Disconnect battery. Refer to Work instructions after disconnecting the battery.
2. Remove left and right covers of console. Refer to Removing and installing centre console cover.
3. Remove centre console cover. Refer to Removing and installing centre console cover.
4. Remove centre console. Refer to Removing and installing centre console.
5. If installed, remove control unit for tilt sensor. Refer to Removing and installing control unit for tilt sensor.

General warning notes

General warning notes for airbag triggering unit

WARNING: Incorrect triggering of airbag modules.
- Danger of injury and material damage to as a result of incorrect handling of airbag units.
- Remove ignition key. Disconnect battery. Route or isolate ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided. Refer to Work instructions after disconnecting the battery.
- Before disconnecting the airbag plug from the triggering unit, always wait for one minute after disconnecting the battery.
- The airbag triggering unit must not be removed with the connector still plugged in.

Removing triggering unit for airbag

Overview, triggering unit for the airbag







Removing triggering unit for airbag

WARNING: Incorrect triggering of airbag modules.
- Danger of injury and material damage to as a result of incorrect handling of airbag units.
- Remove ignition key. Disconnect battery. Route or isolate ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided. Refer to Work instructions after disconnecting the battery.
- Before disconnecting the airbag plug from the triggering unit, always wait for one minute after disconnecting the battery.
- The airbag triggering unit must not be removed with the connector still plugged in Incorrect triggering of airbag modules.

1. From the passenger's side, release electric plug -a- and open the latching lever -arrow-.







2. Unscrew the three fastening screws -1-.







3. Take off both ground straps -2- from the bolt for the triggering unit.
4. Remove triggering unit laterally.

Installing triggering unit

INFORMATION: If a new component (e.g. sensor, airbag control unit, airbag unit) of the airbag system has to be installed, the new component will be supplied with a barcode sticker (tear-off label).







- Tear off the tear-off label -2- on the new component -1- and stick it under the heading Proof of airbag system check/component replacement in the Guarantee and Maintenance booklet.







- The replacement date and mileage must be documented and the booklet must be stamped with the dealer's stamp.

1. Position triggering unit, move both ground straps -2- on the left fastening bolts and screw down with the three fastening nuts -1-. Tightening torque: 8 Nm (6 ftlb.)







2. Connect electric plug and lock it until the lock engages.







3. If the triggering unit is new, lock the airbag triggering unit using the PIWIS Tester 9718.

Subsequent work

Subsequent work for triggering unit

1. If installed, install control unit for tilt sensor. Refer to Removing and installing control unit for tilt sensor.
2. Connect battery. Refer to Work instructions after disconnecting the battery.
3. Install centre console. Refer to Removing and installing centre console.
4. Install centre console cover. Refer to Removing and installing centre console cover.
5. Install left and right covers of console. Refer to Removing and installing centre console cover.

Programming triggering unit

Triggering unit - reading out and writing in data

WARNING: Sudden voltage interruption of the power supply to the control module.
- Destruction of the control module.
- During programming, it is essential to guarantee the power supply for the Porsche System tester. It is essential to connect a battery charger with a current rating of at least 40 A to the vehicle battery.
- Prior to disconnecting the control module, switch off the ignition and remove the ignition key.

INFORMATION:
- The PIWIS Tester 9718 instructions take precedence since the description may be different. This may be due to more recent software versions.
- The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS Tester 9718.

1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition. >> Continue.
2. Select vehicle type using the cursor keys.
3. Move from vehicle type to the list of control units. Locking is only possible after an automatic control unit search.
4. Select Posip with the cursor keys and press the >> key.
5. Select Control unit replacement with the cursor keys and press the >> key.
6. Select Read out values (codings) with the cursor keys and press >>.
7. The message Codes successfully read out appears on the screen of the Porsche System Tester. Press >>.
8. Switch off ignition and replace control unit.
9. Switch on ignition. Switch to the Special functions menu and perform the vehicle handover using the F8 key.
10. In the Special functions menu, erase All fault memories >>, compare Vehicle identification number and confirm.
11. With the cursor keys on Posip - Replacing control unit, after replacement of the control unit, the readout data (see Section 6) are installed under the menu Write in data press >>.
12. System Tester displays Codes successfully written in. Press >>.
13. Locking is only possible after an automatic control unit search.

Lock triggering unit:

14. Change to the menu Posip - lock and press >>.
15. Select the country-specific Equipment and press >>.
16. Start Lock with F8.
17. Observe message on Tester.
18. Quit menu, carry out a test drive, and read out fault memory.

Coding triggering unit

WARNING: Sudden voltage interruption of the power supply to the control module.
- Destruction of the control module.
- During programming, it is essential to guarantee the power supply for the Porsche System tester. It is essential to connect a battery charger with a current rating of at least 40 A to the vehicle battery.
- Prior to disconnecting the control module, switch off the ignition and remove the ignition key.

INFORMATION:
- The PIWIS Tester 9718 instructions take precedence since the description may be different. This may be due to more recent software versions.
- The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS Tester 9718.
- The procedure described must be applied when a control unit has to be replaced and the tester function Control unit replacement cannot be used.

1. Connect the PIWIS tester 9718 to the vehicle and start it. Switch on the ignition. >> Continue.
2. Switch to the Special functions menu and perform the vehicle handover using the F8 key.
3. In the Special functions menu, erase All fault memories >>, compare Vehicle identification number and confirm.
4. Select vehicle type using the cursor keys.
5. Using the >>, move from the vehicle type to the list of control units. Locking is only possible after an automatic control unit search.
6. Select Posip with the cursor keys and press >>.
7. Select Coding and press the >>.
8. Select Thorax driver and code with F8.







9. Select Thorax driver and code with F8.







10. Select Head airbag driver and code with F8.







11. Select Head airbag passenger and code with F8.







12. Select Front airbag driver and code with F8.







13. Select Front airbag passenger and code with F8.







14. Select Seat-belt tensioner driver and code with F8.







15. Select Seat-belt tensioner passenger and code with F8.







16. Select Front sensor driver and code with F8.







17. Select Front sensor passenger and code with F8.







18. Select Side sensor driver and code with F8.







19. Select Side sensor passenger and code with F8.







20. Select AWS and code with F8.







21. Select Seat-belt buckle driver and code with F8.







22. Select Seat-belt buckle passenger and code with F8.







23. Select Left/Right-hand drive and code with F8.







24. Select Key-operated switch and code with F8.







Lock triggering unit:

25. Change to the menu Posip - lock and press >>.
26. Select the country-specific Equipment and press >>.
27. Start Lock with F8.
28. Observe message on Tester.
29. Quit menu, carry out a test drive, and read out fault memory.
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