SPECIAL CARE DURING MECHANICAL REPAIRS
| WARNING | To avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures. |
| WARNING | Some vehicles are equipped with a passenger's side air bag ON/OFF switch. This switch should NOT be used in place of specified vehicle air bag system disabling and activating procedures. |
| WARNING | DO NOT use any type of back-up power supply (memory saver) from outside vehicle to avoid memory loss in memory systems, if equipped. Back-up power supplies can provide enough voltage to deploy air bags. |
Note. When the battery is disconnected, vehicle computer and memory system may lose data. Driveability problems may exist until computer systems have completed a relearn cycle.
In some instances, it may be necessary to remove steering column or instrument panel to gain access to blower motor housing, heater assembly, evaporator assembly, or other A/C-heater system related components. Observe manufacturer service precautions when working on a vehicle equipped with an air bag system. See appropriate manufacturer's SERVICE PRECAUTIONS.
Electrical sources should never be allowed near inflator on back of air bag module. Never probe air bag system electrical wires with analog volt-ohmmeter or test light. Always disable air bag system before servicing vehicle. See appropriate procedure under DISABLING & ACTIVATING AIR BAG SYSTEM . Failure to do so could result in accidental air bag deployment and possible personal injury.
If air bag system is not fully functional for any reason, DO NOT drive vehicle until system is repaired and is again operational. DO NOT remove bulbs, modules, sensors or other components, or in any way disable system from operating normally. If air bag system is not functional, park vehicle until system is repaired and functions properly.
ALLROAD, A4, A6, RS6, S6 & TT
Turn ignition switch to ON position. AIR BAG indicator light should come on for about 4 seconds, and then go out. If light remains on, goes out and comes back on, or flashes continuously, air bag control unit has detected a system fault. For repair procedures, see appropriate AIR BAG RESTRAINT SYSTEMS article in RESTRAINTS.
SERVICE PRECAUTIONS
Observe these precautions when working with air bag systems
- Disable air bag system before servicing any air bag system component or component located in instrument panel or steering column. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/tt/8n-2003-2006/remont/restraints/#air-bag-deactivation-procedures) .
- Because of critical operating requirements of air bag system, DO NOT attempt to service or disassemble any air bag system component. If a component is faulty it must be replaced.
- DO NOT leave air bag components unattended. Install air bag components in vehicle immediately after they are obtained.
- NEVER point open end of a seat belt tensioner at another person.
- Only install NEW air bag system components supplied by manufacturer. DO NOT use components previously installed in another vehicle.
- DO NOT use air bag or seat belt pretensioner components that have been dropped from a height of more than 20 inches (50 cm) to a hard surface or have mechanical damage.
- DO NOT allow chemical cleaners, oil or grease to contact vinyl covering on air bag.
- DO NOT place stickers or covers on steering wheel, passenger's side instrument panel or over front seat backs. Using a seat cushion, mat or pad on front passenger's seat, may inhibit operation of seat occupied sensor and side air bags.
- Disable SRS before performing electric welding on vehicle.
- DO NOT expose air bag module or seat belt pretensioners to temperatures greater than 212°F (100°C).
- DO NOT allow any electrical source near front or side air bag inflators or near seat belt tensioner connector.
- Never use a test lamp or analog volt/ohmmeter for testing.
- A technician must be electrostatically discharged before picking up (touching) an air bag unit or seat belt tensioner. This is accomplished by touching a suitable metal part, for example, a water pipe, a heating pipe or a metal frame.
- When carrying a live air bag assembly, trim cover pad should be pointed away from body to minimize injury in case of accidental air bag deployment.
- When driving or riding in an air bag-equipped vehicle, NEVER hold scan tool or other test equipment in your hands or lap while in motion. Objects between you and the air bag increase the risk of injury in an accident.
- During a road test in an air bag-equipped vehicle, test equipment must always be fastened to and operated from the rear seat by a second technician.
- If SRS is not fully functional for any reason, vehicle should not be driven until system is repaired. DO NOT remove any component or in any way disable system from operating normally. If SRS is not functional, park vehicle until repairs can be made.
| WARNING | Some vehicles are equipped with a passenger's side air bag ON/OFF switch. This switch should NOT be used in place of vehicle air bag system disabling and activating procedures. |
Note. Before disconnecting battery, obtain anti-theft code for radio. After reconnecting battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows. On vehicles equipped with Audi Telematics by OnStar(R), switch-off the emergency (back-up) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery. Emergency battery is turned on and off using VAG 1551/VAG 1552 or VAS 5051/VAS 5052 scan tool in address word 75 - TELEMATICS set to function 10 - ADAPTATION CHANNEL 08.
Disabling
- Obtain radio anti-theft code from vehicle owner and write down preset radio frequencies. Turn ignition off and remove key. If vehicle is equipped with Audi Telematic by OnStar(R), go to next step. If vehicle is not equipped with Audi Telematics by OnStar(R), go to step 6 .
- On vehicles equipped with Audi Telematics by OnStar(R), Telematic and Telephone Control Module emergency (back-up) battery must be switched off prior to disconnecting vehicle battery. Connect VAS 5051 tester or VAG 1551/1552 or equivalent scan tool to Data Link Connector (DLC). DLC located under left side of dash.
- On VAG scan tool press "7" and "5" to select address word 75 - TELEMATICS. Press "Q" button to confirm input. Press "1" and "0" to select function 10 - ADAPTATION CHANNEL. Press "Q" button to confirm input, and go to next step.
- On VAG scan tool press "0" and "8" to select ADAPTATION CHANNEL 8. Press "Q" button to confirm input. Top row of display indicates adaptation channel selected and current adaptation value currently stored: 0 = EMERG.BATTERY - SWITCHED ON; 1 = EMERG.BATTERY - SWITCHED ON, TIME REGISTER RESET; 2 = EMERG.BATTERY - SWITCHED OFF. Bottom row confirms emergency (back-up) battery status.
- On VAG scan tool press "0" button 4 times and "2" button one time to switch off battery. Press "Q" button to confirm input. Scan tool should display CHANNEL 8 ADAPTATION 2 EMERG.BATTERY OFF. Press "Q" button again to confirm input. Scan tool should display CHANNEL 8 ADAPTATION 2 Q STORE CHANGED VALUE?. Press "Q" button again to confirm input. Press "RIGHT ARROW" button to store BATTERY OFF change and display RAPID DATA TRANSFER HELP SELECT FUNCTION XX.
- On all models, disconnect and shield negative battery cable.
Enabling
- Turn ignition switch to ON position. Ensure no one is inside vehicle and connect negative battery cable. Perform a system operation check to ensure proper system operation. See «SYSTEM OPERATION CHECK»(/audi/tt/8n-2003-2006/remont/restraints/#air-bag-deactivation-procedures) .
- Input radio anti-theft security code and reset radio frequencies. Ensure radio, clock and power windows are operating properly. After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar(R), to switch on Telematic/Telephone Control Module emergency (back-up) battery, go to next step.
- Connect VAS 5051 tester or VAG 1551/1552 or equivalent scan tool to Data Link Connector (DLC). DLC located under left side of dash. On VAG scan tool press "0" and "8" to select adaptation channel 8 and go to next step.
- On VAG scan tool press "7" and "5" to select address word 75 - TELEMATICS. Press "Q" button to confirm input. Press "1" and "0" to select function 10 - ADAPTATION CHANNEL. Press "Q" button to confirm input, and go to next step.
- On VAG scan tool press "0" and "8" to select ADAPTATION CHANNEL 8. Press "Q" button to confirm input. Top row of display indicates adaptation channel selected and current adaptation value currently stored: 0 = EMERG.BATTERY - SWITCHED ON; 1 = EMERG.BATTERY - SWITCHED ON, TIME REGISTER RESET; 2 = EMERG.BATTERY - SWITCHED OFF. Bottom row confirms emergency (back-up) battery status.
- On VAG scan tool press "0" button 5 times to switch on battery. Press "Q" button to confirm input. Scan tool should display CHANNEL 8 ADAPTATION 0 EMERG.BATTERY ON. On scan tool press "Q" button again to confirm input and display CHANNEL 8 ADAPTATION 0 Q STORE CHANGED VALUE?. Press "Q" button again to confirm input. Press "RIGHT ARROW" button to store BATTERY ON change and display RAPID DATA TRANSFER HELP SELECT FUNCTION XX on scan tool. On scan tool press "0" and "6" to end output. Press "Q" button to confirm input. Disconnect scan tool from DLC.