Air Bag Systems: Testing and Inspection

690101 Airbag Diagnosis






Visual inspection of airbag units
1. Check that trim elements or stickers are not attached to the airbag units (driver's, passenger's, side, head airbag).
2. Visual inspection of the components for damage and deformation.
3. The system check must be acknowledged in the stamp spaces provided in the Guarantee and Maintenance booklet.

Airbag diagnosis
1. Function test on airbag system:
1.1. PIWIS tester 9718 must be connected and switched on.
1.2. Switch on ignition.
1.3. Establish communication with the airbag control module.
1.4. Read out fault memory: No fault stored.
1.5. Select Drive link test menu.
1.6. Read out fault memory for all control units and erase if necessary.
1.7. Remove ignition key. Disconnect battery. Route or isolate the ground strap so that all contact with a ground carrier (e.g. body) is avoided. Refer to Working instructions after disconnecting the battery

CAUTION: Danger of injury and material damage if airbag units are not handled correctly.

- Always observe the safety regulations for handling airbag units. Refer to Safety regulations for handling airbag and seat-belt pretensioner units
- After the battery is disconnected, always wait for 1 minute before disconnecting the airbag plugs.

2. Simulating the fault:

NOTE: To check the operation of the airbag system, a plug connection is disconnected from an airbag unit. A fault code - Static fault - must then be stored in the Porsche System Tester.

2.1. Simulate the fault using the side airbag, for example. Move seat all the way forward. Switch off ignition, disconnect the battery and wait for 1 minute.
2.2. Unlock and disconnect electric plug for the seat.
2.3. Connect the battery and switch on ignition.
2.4. Read out fault memory. Static fault present.






3. Correcting the fault:
3.1. Switch off ignition, disconnect the battery and wait for 1 minute.
3.2. Insert connector in plug socket until connector is felt to engage.

4. Reading out and deleting faults:

NOTE: Fault memory shows a sporadic fault.

4.1. Connect the battery, switch ignition on and read out the fault memory with the Porsche System Tester.
4.2. Erase fault memory.

Carry out work instruction after disconnecting the battery.