Reading and writing values for AWS control unit

NOTE: The PIWIS tester P 9718 instructions take precedence and in the event of a discrepancy these are the instructions that must be followed. Deviations may occur with later software versions.

The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS tester P 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. Move passenger's seat longitudinally until flush with the seat rails and to its lowest position.

3. Connect the Porsche System Tester PIWIS Tester P 9718 to the vehicle and start the System Tester. Switch on ignition. Press >> to continue.

4. Select vehicle type.

5. Switch from the vehicle type to the list of control units >>.

6. Select AWS with the cursor keys and press the >> key.

7. Select Control unit replacement with the cursor keys and press the >> key.

8. The Tester displays several messages and instructions relating to the individual work steps until the message Control unit replacement was completed successfully appears. Press >>.

9. To check the system, select the Actual values menu under the AWS control unit. Then press >>.

9.1. Select the Weight group (0-4) and Gross weight calibrated options.

9.1.1. If there is no weight on the passenger's seat, compare values (see Calibrated Values ) using the PIWIS Tester. The Passenger Airbag Off indicator light in the center console must not come on.

9.1.2. Place the special tool test weight P 9742 on the passenger's seat. The Passenger Airbag Off indicator light in the center console must come on. Compare values (see table below) using the PIWIS Tester.

9.1.3. 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 center console must not come on. Compare values (see table below) using the PIWIS Tester.

Calibrated Values

Test state	Weight group (0-4)	Gross weight calibrated (seat in calibration position)
No weight on the passenger's seat.	0	→ Control value: 0 kg +/-1 kg
Special tool test weight P 9742 on passenger's seat	1	→ Control value: 6.7 kg +/-1 kg
Get a person weighing > 55 kg at least to sit on the passenger's seat.	2, 3 or 4	→ Control value for person's weight: > 55 kg ; person's weight +/- 25 %

10. 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.