Air Bag Control Module: Service and Repair
WM 696819 Removing and installing AWS control unit
Tools
Technical values
Preliminary work
Preliminary work for AWS control unit
Disconnect battery. -> 2706IN Work instructions after disconnecting the battery
Remove right front seat. -> 720119 Removing and installing front seat - section on "Removing" 720119 Removing and Installing Front Seat
Removing AWS control unit
Installation position shown on the 911
1. Turn seat central connector -A- at AWS holder to the left and remove from the holder.
Loosening seat central connector
2. Unscrew the three fastening screws -1- for the AWS holder on the seat bracket.
Fastening screws for AWS holder
3. Release electric connector on AWS control unit -a- , unplug and tilt the AWS holder to the right side.
4. Unscrew the three fastening screws -2- of the AWS control unit and remove the control unit.
Unscrewing fastening screws for AWS control unit.
Installing AWS control unit
1. Position AWS control unit on the holder and screw it down using the three fastening screws -2-.
Screwing AWS control unit and holder together
2. Position AWS holder on the seat bracket and screw it down using the three fastening screws -1-.
Screwing AWS holder to seat bracket
3. Push electric connector onto AWS control unit until it is felt to engage.
4. Insert seat central connector into AWS holder and clamp by turning to the right.
Subsequent work
Subsequent work for AWS control unit
Install right front seat. -> 720119 Removing and installing front seat - section on "Installing" 720119 Removing and Installing Front Seat
Connect the battery and carry out work instructions after disconnecting the battery. -> 2706IN Work instructions after disconnecting the battery
1. If the AWS control unit has been replaced, the new AWS control unit must be taught and calibrated under AWSControl unit replacement. -> 696819 Removing and installing AWS control unit - section on "Programming"-> 6968K2 Calibrating AWS control unit - section on "Calibrating" Testing and Inspection
Programming AWS control unit
Reading and writing values for AWS control unit
Information
The PIWIS Tester 9718 instructions take precedence since the description may be different with later Tester releases.
The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS Tester 9718.
1. Replace control unit. -> 696819 Removing and installing AWS control 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.
2. Connect battery charger to the vehicle.
3. Seat calibration position - move passenger's seat longitudinally until flush with the seat rails and to its lowest position.
4. Connect the Porsche System Tester PIWIS Tester 9718 to the vehicle and start the System Tester. Switch on ignition and press >>.
5. Select vehicle type.
6. Switch from the vehicle type to the list of control units and press >>.
7. Select AWS with the cursor keys and press >>.
8. Select Control unit replacement with the cursor keys and press >>.
9. The Tester displays several messages and instructions relating to the individual work steps until the message Control unit replacement was completed successfully appears. Press >>
10. To check the system, select the Actual values menu under the AWS control unit. Then press >>
10.1. Select the Weight class (0-4) and Total weight calibrated options.
10.1.1. If there is no weight on the passenger's seat, compare values (see table below) using the PIWIS Tester. The Passenger Airbag Off indicator light in the centre console must not come on.
10.1.2. Place the special tool test weight P 9742 on the passenger's seat. The Passenger Airbag Off indicator light in the centre console must come on. Compare values (see table below) using the PIWIS Tester.
10.1.3. Get an assistant with a body weight of more than 55 kg, for example, to sit on the passenger's seat. The Passenger Airbag Off indicator light in the centre console must not come on. Compare values (see table below) using the PIWIS Tester.
11. Read out and erase the fault memories in the Airbag and AWS control unit, perform a test drive and then read out the fault memories again. If faults are found, determine the cause using the PIWIS Tester and correct the faults.