Airbag System B 05

General information

NOTE: As from model year 2002, the front three-point belt will be be with a belt tensioner as standard.

The following points must be observed during vehicle diagnosis:
- After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
- After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II No. 9588 and carry out a test drive.
- After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again.

General information on the fault memory

NOTE:
- A period of 10 seconds is required to enable the triggering unit to identify all faults in the system. In order to guarantee that every possible fault source is checked during the vehicle test, the ignition must be switched on for at least 10 seconds.
- The fault memory must be cleared following a fault in the airbag system and after it has been remedied.
- The replacement of a component must be noted in the Guarantee and Maintenance booklet.To do this, attach the documentation number in a free panel intended for that purpose.The documentation number is attached to the replacement part as a tear-off sticker.
- If the fault memory is cleared, the ignition must be switched off, the ignition key removed and the ignition switched on again in order to check the fault path. Only in this way is another self-test carried out.

The following components must be removed and replaced following an accident in which the airbag system was triggered:
- Contact unit
- Triggered airbag unit(s)

The triggering unit must be replaced after the airbag is triggered for the third time.

Fault Code Setting Conditions
Fault codes can be set in several circumstances, e.g.:
- battery disconnected
- plug connections disconnected
- faulty coding
- power failure
- etc.

In these circumstances, no fault is present in the system and the fault memory must be erased.

Fault memory Info key [F8]
In order to be able to assess the fault exactly, the fault memory Info key[F8] must be pressed. This information should be saved using the Save key [F4] and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.

Type of fault / occurrence of fault

Open circuit / short circuit to ground: There is (present) or was (not present) a short circuit to ground or an open circuit in the circuit to the control module pin.

Short circuit to B+ There is (present) or was (not present) a short circuit to voltage.

Above limit value Resistance too low Wiring leak e.g. short circuit to ground, faulty component

Above limit value Resistance too high e.g. open circuit, component faulty

Start Shows the time elapsed since the fault first occurred (present). If the fault arises again the clock continues

Stop Shows the time elasped since the fault was first remedied (not present). If the fault arises again the clock continues

Occurrence of faults
The fault occurred as follows:
- statistically (i.e. once)
- sporadically (i.e. more than once)

Fault status
The following status types are possible:
- available (at the time of the last diagnosis routine)
- not available (at the time of the last diagnosis routine)