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Programming 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. → Installing AWS Control Unit 
    NOTE: Voltage drop
    • Risk of irreparable damage to control unit
    • Risk of damage to control unit
    • Fault entries in the control unit
    • Coding in the control unit is aborted
    • Malfunctions in control unit, even during programming

    → Prior to disconnecting the control unit, switch off the ignition and remove the ignition key.

    → Ensure that the power supply is not interrupted during programming.

    → Connect a battery charger with a current rating of at least → Nominal value: 40 A  to the vehicle battery.

  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 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 by pressing [>>].
  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. Select the Fault memory  menu in the AWS  control unit. If faults are present, erase the fault memory  .
  10. Exit the AWS  control unit and switch to the Airbag  control unit.
  11. Select the Teach AWS  menu and press [>>].
  12. Switch off the ignition when the Tester displays the prompt Switch off ignition  .
  13. Switch on the ignition when the Tester displays the prompt Switch on ignition  .
  14. When the Tester displays the message AWS was taught successfully  , press [>>].
  15. Exit the Airbag  control unit and switch to the AWS  control unit.

    Information 

    A system test can only be performed successfully if:

    • The AWS control unit has been taught on the airbag control unit. 
    • There are no faults in the AWS and airbag control unit. 
  16. Select the System test  menu in the AWS  control unit.
  17. Follow the instructions on the Tester. Press [>>] and perform the test using the default sequence.
    1. 17.1. Seat empty  - the passenger's seat must be empty. The Passenger Airbag Off indicator light in the centre console must not come on. To determine the status, press [F7] or [F8]. Then press [>>].
    2. 17.2. Child  - place the special tool test weight 9742  on the passenger's seat. The Passenger Airbag Off indicator light in the centre console must  come on. To determine the status, press [F7] or [F8]. [>>].
    3. 17.3. Adult  - get an assistant, for example, to sit on the passenger's seat. The Passenger Airbag Off indicator light in the centre console must not  come on. To determine the status, press [F7] or [F8]. Then press [>>].
    4. 17.4. Seat jammed  - the passenger's seat must be empty. The seat must also be relieved of any pressure, e.g. by lifting the seat up with your hand. The Passenger Airbag Off indicator light in the centre console must  come on. In addition to the Airbag Off indicator light, a message is displayed in the instrument cluster: Check passenger seat adjustment  . To determine the status, press [F7] or [F8]. Then press [>>].
  18. To check the system, select the Actual values  menu under the AWS  control unit. Then press [>>].
    1. 18.1. Select the Weight group (0-4)  and Gross weight calibrated  options.
    2. 18.1.1. 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.
    3. 18.1.2. Place the special tool test weight 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.
    4. 18.1.3. 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.
    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 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 % 
  19. 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.
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