Introduction

Introduction

System B05
911 Turbo (996)

Safety Notes

WARNING: Observe the safety regulations when working on the airbag system.

DANGER: Danger of injury if airbag triggering units were not locked.

The airbags cannot be triggered in the event of an accident or another event which requires them to be operational.
- Always lock new airbag triggering units immediately after installing them in the vehicle.
- Only operate the vehicle if the airbag triggering unit was locked beforehand.

WARNING:
- Danger of injury when driving and working on the vehicle.
- Never hang the Porsche System Tester II No. 9588 over the steering wheel.
- Always place tools and special tools outside the functioning range of all airbags and the roll-over bar.

- Danger of injury and damage to property as a result of incorrect handling of airbag units.

Please observe the following points:

Part 1:
- Inspection and assembly work may only be carried out by specialist staff.
- After the battery is disconnected, assembly work or work on the vehicle with a hammer or similar tools may not be started until after a waiting period of 1 minute.
- This is necessary in order to interrupt the power supply to the airbag system and to ensure it is not triggered accidentally.
- Airbag units must be fitted immediately after being removed from their storage location.
- On no account may airbag units be Deft lying around unsupervised.
- If work is interrupted, airbag units must immediately be locked away again.
- Airbag units must not come into contact with grease, oil, cleaning agents or similar substances.
- Airbag units may not be exposed to temperatures above 90 degree C.
- Airbag units and control modules which have fallen from a height of more than 0.5 m may no longer be installed.
- No additional linings, stickers or similar may be attached to the steering wheel and in the vicinity of the passenger's airbag.
- No changes may be made to the wiring and to the components of the airbag system.
- The battery must always be disconnected before starting straightening and welding work with an electrical welding unit.

Part 2:
- The airbag units are pyrotechnical items in hazard class T1.
- Handling, transport and storage of these units must conform to the explosives legislation.
- The listed statutory requirements refer to the Federal Republic of Germany.
- The relevant valid regulations must be observed in all other countries.
- The commencement of work with pyrotechnical items must be reported 14 days in advance to the Trade Supervisory Office (responsible authority).
- Airbag units may only be dispatched in transport packaging officially approved for that purpose.
- Airbag units may not be transported with other hazardous goods.
- Internally, they must always be transported in the luggage compartment or cargo hold of a vehicle using the above mentioned transport packaging.
- They must not be transported in the passenger's compartment.
- Airbag units must be stored in accordance with the second ordinance of the explosives legislation.
- This ordinance stipulates that small quantities of materials and objects may be stored at certain locations without special storage approval.
- According to the Explosives Storage Directive of August 1997, these quantities are max. 10 kg (net) in a work room and max. 100 kg (net) in a storage room in the case of Class T1 pyrotechnical items.

CAUTION: Danger of damage due to improper handling of batteries and control module plug connections.

This may cause malfunctions and system failures.
- Disconnect the battery connection terminals only when the engine is switched off.
- Start the engine only when the battery connection terminals are properly connected.
- Pull off or push on plug connections for the control modules or other electronic components only when the ignition is switched off.
- Protect the plug connections from liquids.
- Remove any penetrating liquids completely by suitable means.
- Disconnect the negative terminal of the battery before welding work is started on the vehicle.

General Information

NOTE: As of model year 2002, the front three-point belt will be fitted 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.

NOTE: 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 a "not present" status and no other problems are present, then the fault memory must be erased.

Fault type/Fault occurrence
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 terminal.
Short circuit to B+ There is (present) or was (not present) a short circuit to voltage.
Below 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 occurs again, the clock continues.
Stop Shows the time elapsed since the fault was first remedied (not present). If the fault occurs again, the clock continues.

Fault occurrence
The fault occurs in the following way:
- Statically (i.e. once)
- Sporadically (i.e. more than once)

Fault status
The following status types are possible:
- Present (at the time of the last diagnostic routine)
- Not present (at the time of the last diagnostic routine)