Air Bag Restraint Systems Audi S8 D2 рестайлинг 2

DESCRIPTION & OPERATION

The air bag restraint system is designed to provide increased protection for driver and passengers by deploying front air bags and front and rear seat belt pretensioners in a front-end collision, and front and rear side air bags when side impact is detected. The system is designed to be used with 3-point seat belts.

Main components of the system include driver-side air bag module, passenger-side air bag module, front seat occupied sensors, driver and passenger seat-mounted side air bag modules, rear side air bag modules, right and left head air bag modules, front and rear seat belt pretensioners, air bag control module, side air bag impact (crash) sensors (also known as lateral acceleration sensors), front seat belt indicators, data link connector, spiral spring assembly (under steering wheel, in steering column), air bag malfunction indicator light and passenger-side air bag off indicator light. (Scheme 1)

Air bag control module is capable of system self-diagnostics. Air bag system components are monitored electrically and any interferences in operation can be detected. These interferences (faults) are then stored in air bag control module memory. Air bag control module memory differentiates between types of faults. After diagnosis and servicing, fault memory can be erased.

COMPONENT LOCATIONS

For restraint system component locations, refer to illustration. (Scheme 1)& (Scheme 2).

Scheme 1

Scheme 2

SERVICING

Manufacturer recommends replacing main air bag system components (air bag modules, seat belt pretensioners, spiral spring and air bag control module) every 15 years. Replacement year and month appear on a sticker located on driver-side B-pillar. Sticker must be updated when components are replaced.

SYSTEM OPERATION CHECK

Turn ignition switch to ON position. Air bag Malfunction Indicator Light (MIL) should come on for about 4 seconds and then go out. If MIL comes on and remains on, air bag control module has detected a system fault. See DIAGNOSTICS . If light does not light, check bulb. If bulb is okay, perform diagnostics. See DIAGNOSTICS .

AIR BAG SAFETY PRECAUTIONS

Observe these precautions when working with air bag systems

1. Before disconnecting battery cable(s) and disabling air bag system, obtain radio security code from vehicle owner.
2. Never use test light, ohmmeter or voltmeter to test air bag system, except when testing spiral spring. System can only be tested using Scan Tool (VAG 1551/1552), Vehicle Diagnostic, Testing and Information System (VAS 5051) or equivalent scan tool, with appropriate adapter. DO NOT use Air Bag Tester (VAG 1619).
3. Disable air bag system before servicing any part of system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) .
4. Air bag system components must never be opened, disassembled or repaired. Always use NEW parts.
5. Air bag system components have expiration dates listed on driver-side B-pillar. Upon expiration (15 years), components must be replaced.
6. Air bag modules must not be stored for longer than 3 months.
7. DO NOT use air bag system components that have been dropped from heights of approximately 20" (0.5 m) or higher. Always replace air bag components that have been mechanically damaged.
8. DO NOT leave undeployed air bag system components unattended. Install components in vehicle immediately after removing from packaging.
9. When placing undeployed air bag modules on a bench or other surface, always make certain that trim cover faces up.
10. DO NOT allow chemical cleaners, oil, or grease to contact vinyl covering on air bag modules.
11. DO NOT expose air bag modules to temperatures greater than 212°F (100°C).
12. Use only original equipment seat covers that are designed for use with side air bags (identified by label on fabric).
13. Inspect A-, B-, C- and D-pillar trim panels for damage prior to installing head air bag. Replace any damaged trim panels. Never attempt to repair trim panels. Ensure trim panels are securely installed after installation of head air bag.
14. Prior to performing any repairs behind head air bag, entire air bag module must be removed. DO NOT bend head air bag.
15. When removing head air bag, first, attach A-pillar end to tether on ignitor, forming a loop. Carry head air bag by ignitor, thumb towards connector.
16. After servicing, check system for proper operation. See «SYSTEM OPERATION CHECK»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__system-operation-check) .

CENTERING SPIRAL SPRING

If spiral spring is twisted, it must be centered before installation. From central position, spiral spring must be able to turn 3 1/2 turns in both directions.

DISABLING & ACTIVATING AIR BAG SYSTEM

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__air-bag-safety-precautions) . To disable air bag system, turn ignition off. Disconnect and shield negative battery cable. No waiting time is necessary.
2. To activate system, ensure no one is inside vehicle and turn ignition on. Reconnect negative battery cable. Perform system operation check to ensure system is functioning properly. See «SYSTEM OPERATION CHECK»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__system-operation-check) .

DEPLOYED AIR BAGS OR SEAT BELT PRETENSIONER

Deployed air bag modules and seat belt pretensioners can be disposed of like any other part. Handle air bag module using gloves, and wear safety glasses.

UNDEPLOYED AIR BAGS OR SEAT BELT PRETENSIONER

Undeployed air bags and seat belt pretensioners must be removed from vehicle and deployed before disposal. Undeployed air bag modules and seat belt pretensioners must not be disposed of at normal refuse locations. Undeployed air bag modules and seat belt pretensioners contain substances which can cause illness or injury if handled improperly. Disposal of air bag modules and seat belt pretensioners in any manner inconsistent with proper procedures may be a violation of federal, state and/or local laws.

Transportation of undeployed air bag modules and seat belt pretensioners is subject to laws for flammable solids and regulated by Department of Transportation (DOT) and most state governments. Special shipping procedures are required. A DOT exemption label must be attached to undeployed air bag module or seat belt pretensioner being shipped. This DOT exemption label is included with replacement air bag module or seat belt pretensioner. Use replacement air bag module or seat belt pretensioner shipping box to return undeployed component. Repair shops should check with hazardous material section of their respective state governments for applicable shipping requirements.

SCRAPPED VEHICLE

Undeployed air bags and seat belt pretensioners must be removed from vehicle and deployed before scrapping vehicle. Undeployed air bag modules and seat belt pretensioners must not be disposed of at normal refuse locations.

Seat Belt Pretensioner

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__air-bag-safety-precautions) . Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) . Remove necessary parts to access seat belt pretensioner to be deployed. Cut seat belt above belt lock tab. Unplug harness connector at seat belt pretensioner. Connect Deployment Harness (8D1971259) to pretensioner connector.
2. Extend deployment harness its full length away from vehicle and position car battery at end of harness. Ensure no one is inside vehicle. Open windows and close doors. Connect ends of deployment harness to battery terminals to immediately deploy seat belt pretensioner. Allow adequate time for heat and deployment vapors to dissipate prior to entering vehicle. Dispose of pretensioner like any other scrapped part.

POST-COLLISION INSPECTION

When a vehicle has been involved in a collision, certain components of the passive restraint system must be inspected or replaced. See AIR BAG/SRS COMPONENT INSPECTION & REPLACEMENT TABLES article in the GENERAL INFORMATION section.

REMOVAL & INSTALLATION

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Air bag control module is located behind center console. (Scheme 1) Remove speaker mount for telephone if equipped. Position driver and passenger-side seats in the full rearward position. Pull back right and left front floor board portions of carpet and remove center console side trim panel fasteners.
2. Turn accelerator pedal stop 90 degrees clockwise. Remove left and right center console side trim. Pull up parking brake lever as far as possible. Pry out lock-pin at base of parking brake lever grip, then slide lever grip off lever. (Scheme 3) Remove parking brake lever trim cover, loosen lock bolt 2 turns, then remove parking brake lever trim. NOTE: Create a tool with a hook using 0.12" (3 mm) diameter wire. Hook should be bent to 90 degrees, approximately 0.24" (6 mm) long onto end of wire. (Scheme 4) DO NOT pull on vent fins when removing center instrument cluster air vents with hooked tool. Removal holes are located inside vent, on center of side of vent.
3. On manual transmission models, shift transmission into 4th gear and remove shifter knob. Remove center armrest, if equipped. On all models, remove screws and center console rear air outlet. Insert hooked tool into instrument cluster air vent removal holes and remove vents.
4. Remove 5 center instrument cluster bolts, disconnect connectors and remove center instrument cluster. Remove front center console bolts and push ashtray forward. Using sharp knife, separate adhesive between center console and instrument panel, as necessary.
5. Raise rear of center console over parking brake lever and remove. Disconnect air bag control module connector. Remove air bag control module nuts. Remove air bag control module and spacers. (Scheme 5)
6. To install, reverse removal procedure. Ensure spacers are placed correctly under air bag control module. Tighten air bag control module nuts to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Replacement air bag control modules must be coded. See «CODING AIR BAG CONTROL MODULE»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__coding-air-bag-control-module) under DIAGNOSTICS.

Scheme 3

Scheme 4

Scheme 5

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) . Driver-side air bag module is located on steering wheel hub.
2. Release steering column adjuster and position steering wheel in full upward and outward position. Position steering spokes in vertical position and using Torx T30 socket, remove one bolt on back of steering wheel. Rotate steering wheel 180 degrees and remove remaining bolt. Tilt air bag module down and disconnect air bag module harness connectors. Remove air bag module.
3. To install, reverse removal procedure. Install and tighten air bag Torx screws by hand. Tighten right-side screw, then left-side screw to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications) . Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) .

Scheme 6

FRONT SEAT OCCUPIED SENSOR

Note. Front seat occupied sensor is integrated with seat cushion and must be replaced as an assembly.

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) . Remove front seat and seat lower trim. Remove seat cushion cover. Cut through cable ties securing wiring harness to seat frame. Disconnect side air bag sensor connector and seat occupied sensor connector. Remove seat cushion assembly.
2. To install, reverse removal procedure. Secure wiring harness to seat frame using NEW cable ties. Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) .

PASSENGER-SIDE AIR BAG MODULE

Note. Passenger-side air bag module supports must be replaced if air bag has deployed.

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Passenger-side air bag module is located above glove box.
2. Remove glove box frame screws and pull glove box with frame away from instrument panel. Disconnect glove box light connector and lower glove box assembly to floor (Bowden lock cable remains connected). Disconnect Orange air bag module harness connector. (Scheme 7) Remove air bag module screws. Remove air bag module through glove box opening.
3. To install, reverse removal procedure. Tighten air bag module screws to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Scheme 7

Removal & Installation (Front)

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Remove upper and lower B-pillar trim. Remove upper and lower seat belt anchor bolts. (Scheme 8) Release locking bar and disconnect seat belt pretensioner harness connector. Remove bolt and seat belt pretensioner.
2. To install, reverse removal procedure. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Removal & Installation (Side-rear)

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Remove rear seat bench. Remove lower seat belt anchor bolt. Remove belt guide and belt webbing guide covers. (Scheme 9) Remove rear seatback rear shelf. Pull belt through belt webbing guide. Disconnect harness connector at seat belt pretensioner. Remove bolt and seat belt pretensioner.
2. To install, reverse removal procedure. Tighten seat belt anchor bolt and pretensioner bolt to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Removal & Installation (Center-rear)

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Remove rear seat bench. Remove bolt, washer and seat belt pretensioner. (Scheme 10)
2. To install, reverse removal procedure. Tighten pretensioner bolt to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Scheme 8

Scheme 9

Scheme 10

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Impact (crash) sensors for side air bag modules are mounted behind B-pillar trim. (Scheme 11) Remove B-pillar trim. Disconnect impact (crash) sensor harness connector. Remove screws and crash sensor.
2. To install, reverse removal procedure. Tighten impact (crash) sensor screws to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Scheme 11

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Head air bag modules are mounted behind headliner trim above side windows. (Scheme 12)
2. Remove rear seat bench, rear seat back and rear shelf panel. Remove rear handle and coat hook. Pull door seals away from pillar trim areas. Remove A-pillar and D-pillar trim panels. Disconnect head air bag harness connector. Remove air bag module bolts and ignitor bolts. Lower ignitor to rear shelf.
3. Disconnect air bag module brackets from roof frame. Attach A-pillar end of head air bag to tether on ignitor, forming a loop. Remove air bag module from vehicle. Always carry head air bag by ignitor, thumb towards connector.
4. To install, position head air bag in vehicle in looped position. Using securing pin, insert air bag module brackets in roof frame at mounting point "A", and between mounting point and ignitor. (Scheme 12) Install bolts in ignitor at mounting point "B" and tighten to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Remove tension strap from ignitor and straighten air bag module.
5. Using securing pin, insert air bag module brackets in roof frame starting at mounting point "C" and continuing forward until all brackets are installed. Install bracket and tension strap screws and tighten to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications).
6. Connect air bag module connector. To complete installation, reverse removal procedure. Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Scheme 12

SIDE IMPACT (CRASH) AIR BAG MODULES (FRONT)

Note. DO NOT remove seat back from seat frame assembly.

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Side impact (crash) air bag modules are mounted in outer seat back padding of each front seat.
2. Remove front seat and backrest seat cover. Unclip safety catch and disconnect harness connector. (Scheme 13) Remove side air bag screws and ground cable. Press side air bag forward and unhook from brackets. Remove air bag module.
3. To install, reverse removal procedure. Ensure ground cable is mounted with lower side air bag screw. Tighten side impact (crash) air bag module screws to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Scheme 13

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Side impact (crash) air bag modules are mounted in padding on each side of rear seat back.
2. Remove rear seat and seat back. Using screwdriver, remove upholstery hooks in area of side air bag. Remove safety clip and disconnect harness connector. (Scheme 14) Pull cover clear from side air bag to allow access to nuts. Remove side air bag module nuts and disconnect ground cable. Press side air bag module forward and pull out from top.
3. To install, reverse removal procedure. Tighten side impact (crash) air bag module nuts to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

Scheme 14

Scheme 15

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system). Ensure front wheels are in straight-ahead position. Spiral spring is located under steering wheel.
2. Remove steering wheel. See «STEERING WHEEL»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems). Remove upper steering column cover screws and column cover. Remove lower steering column cover gap trim. Remove tilt lever handle screws and tilt lever handle. Remove lower steering column cover screws, bolt and lower cover. (Scheme 15) Disconnect spiral spring harness connector. Release locking lugs and remove spiral spring. DO NOT turn or twist spiral spring after removal. NOTE: New spiral spring has a cable tie that locks assembly in its centered position. Cable tie must be removed before installing new spiral spring.
3. To install, reverse removal procedure. Ensure front wheels are in straight-ahead position. Center spiral spring if necessary. See «CENTERING SPIRAL SPRING»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__centering-spiral-spring) under ADJUSTMENTS. Tighten fasteners to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system).

1. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) . Turn front wheels to straight-ahead position. Remove driver-side air bag module. See «DRIVER-SIDE AIR BAG MODULE»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems) . Remove steering wheel bolt. Disconnect harness connector. Remove steering wheel.
2. To install, reverse removal procedure. Tighten steering wheel bolt to specification. See «TORQUE SPECIFICATIONS»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__torque-specifications) . Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/audi/s8/d2-2-2002-2003/remont/airbag/#air-bag-restraint-systems__disabling-activating-air-bag-system) .

DIAGNOSTICS

Note. Although other scan tools are available, manufacturer recommends using Scan Tool (V.A.G 1551/1552) or Vehicle Diagnostic, Testing and Information System (VAS 5051) to access air bag system on-board diagnostics. The following procedures are designed for use with V.A.G 1551/1552 or VAS 5051.

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Air bag system is equipped with On Board Diagnostic (OBD) capability. If malfunction exists in a monitored sensor or other component, a Diagnostic Trouble Code (DTC) indicating type of malfunction is stored in DTC memory. Air bag Malfunction Indicator Light (MIL) in instrument cluster illuminates. DTCs remain stored in memory and MIL remains on until DTC memory is checked and erased using an appropriate scan tool. If air bag system has deployed, DTC memory records whether components deployed correctly.

Connecting Scan Tool

Connect Scan Tool (VAG 1551/1552), Vehicle Diagnostic, Testing and Information System (VAS 5051) or equivalent scan tool, with appropriate adapter, to 16-pin Data Link Connector (DLC) in lower left corner of instrument panel, to left of steering wheel. (Scheme 16) If there is no display, check voltage supply to DLC.

Scheme 16

Checking & Erasing DTC Memory

With appropriate scan tool connected, turn ignition on. Press button "1" to select RAPID DATA TRANSFER. Press buttons "1" and "5" to select air bag code 15. Confirm input with "Q" button. Use right arrow to scroll forward through program. After approximately 5 seconds, RAPID DATA TRANSFER and SELECT FUNCTION will appear on display. Press buttons "0" and "2" to select "Check DTC Memory" function 02. Confirm input with "Q" button. Perform appropriate diagnostic test. See DIAGNOSTIC TESTS . Press buttons "0" and "5" to select "Erase DTC Memory" function 05. Confirm input with "Q" button. Intermittent malfunctions are indicated by "/SP" on right side of scan tool display. Press "Print" button for complete printout of scan tool operation. To conduct an automatic test sequence, enter "00" and confirm input with "Q" button.

Coding AIR Bag Control Module

With appropriate scan tool connected, turn ignition on. Press button "1" to select RAPID DATA TRANSFER. Press buttons "1" and "5" to select air bag code 15. Confirm input with "Q" button. Use right arrow to scroll forward through program. After approximately 5 seconds, RAPID DATA TRANSFER and SELECT FUNCTION will appear on display. Press buttons "0" and "7" to select "Code Air Bag Control Module" function 07. Confirm input with "Q" button. Enter air bag control module code. See AIR BAG CONTROL UNIT CODES table.

Confirm input with "Q" button. Press buttons "0" and "6" to select "End Output" function 06. Confirm input with "Q" button. Remove key from ignition. Repeat procedure to ensure correct coding. Check system for proper operation. See SYSTEM OPERATION CHECK .

AIR BAG CONTROL UNIT CODES

DIAGNOSTIC TESTS

Note. The following is a list of malfunctions recognized by air bag control module.

Possible Cause

Battery discharged or malfunctioning. Short in wiring.

Corrective Action

Charge or replace battery. Repair short in wiring.

Open/short circuit in wiring. Spiral spring defective. Driver-side air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Check spiral spring. Replace driver-side air bag. Replace air bag control module.

Open/short circuit in wiring. Passenger-side air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace passenger-side air bag. Replace air bag control module.

Damaged wiring. Left side seat belt switch defective.

Locate and repair damaged wiring. Replace left side seat belt switch.

Damaged wiring. Right side seat belt switch defective.

Locate and repair damaged wiring. Replace right side seat belt switch.

Air bag circuit wiring damaged, spiral spring, air bag module(s) or air bag control module defective.

Locate and repair damaged wiring. Check spiral spring. Replace air bag module(s). Replace air bag control module.

Frontal or side collision.

Replace air bags, air bag control module and other components as necessary.

Open/short circuit in wiring. Left side seat belt pretensioner triggered or defective. Air bag control module defective.

Locate and repair open/short circuit. Connect harness connector. Replace air bag control module.

Open/short circuit in wiring. Right side seat belt pretensioner triggered or defective. Air bag control module defective.

Locate and repair open/short circuit. Connect harness connector. Replace air bag control module.

Wiring damaged. Sensor defective. Air bag control module defective. Wiring or diode connections reversed.

Locate and repair open/short circuit. Replace sensor. Replace air bag control module. Reconnect wiring.

Open circuit, short to ground or short to voltage in wiring. Air bag malfunction indicator bulb. Instrument cluster faulty. Air bag control module faulty.

Repair wiring. Repair open circuit in wiring. Replace malfunction indicator bulb. Repair instrument cluster. Replace air bag control module.

Air bag control module incorrectly coded for vehicle configuration.

Code air bag control module appropriately.

Wiring damaged. Pretensioner defective. Air bag control module defective.

Locate and repair open circuit. Replace pretensioner. Replace air bag control module.

Wiring damaged. Pretensioner defective. Air bag control module defective.

Locate and repair open/short circuit. Replace pretensioner. Replace air bag control module.

Wiring damaged. Sensor defective. Air bag control module defective. Wiring or diode connections reversed.

Locate and repair open/short circuit. Replace sensor. Replace air bag control module. Reconnect wiring.

Wiring damaged. Sensor defective. Air bag control module defective. Wiring or diode connections reversed.

Locate and repair open/short circuit. Replace sensor. Replace air bag control module. Reconnect wiring.

Wiring damaged. Air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace air bag. Replace air bag control module.

Wiring damaged. Air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace air bag. Replace air bag control module.

Wiring damaged. Air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace air bag. Replace air bag control module.

Wiring damaged. Air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace air bag. Replace air bag control module.

Open/short circuit in wiring. Harness connector disconnected. Impact (crash) sensor defective. Air bag control module defective. Air bag control module incorrectly coded. Air bag control module and impact (crash) sensor mismatched.

Locate and repair damaged wiring. Reconnect harness connector. Replace impact (crash) sensor. Replace air bag control module.

Open/short circuit in wiring. Harness connector disconnected. Impact (crash) sensor defective. Air bag control module defective. Air bag control module incorrectly coded. Air bag control module and impact (crash) sensor mismatched.

Locate and repair damaged wiring. Reconnect harness connector. Replace impact (crash) sensor. Replace air bag control module.

Air bag control module faulty.

Replace air bag control module.

Open circuit in wiring. Air bag control module defective. Air bag switch defective.

Locate and repair damaged wiring. Replace air bag control module. Replace air bag switch.

Air bag control module incorrectly coded.

Recode air bag control module.

Wiring damaged. Control unit faulty. Indicator light bulb defective.

Locate and repair damaged wiring. Replace control unit. Replace indicator light bulb.

Wiring damaged. Air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace air bag. Replace air bag control module.

Wiring damaged. Air bag defective. Air bag control module defective.

Locate and repair open/short circuit. Replace air bag. Replace air bag control module.

Air bag control module defective.

Replace air bag control module.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

WIRING DIAGRAMS

Note. S8 wiring diagram is not available. A8 diagram is similar. (Scheme 17)& (Scheme 18)

Air Bag System Wiring Diagram (A8-1 Of 2). Scheme 17

Air Bag System Wiring Diagram (A8-2 Of 2). Scheme 18

See also:
• AIR BAG/SRS COMPONENT INSPECTION & REPLACEMENT TABLES
• AIR BAG SAFETY PRECAUTIONS
• DIAGNOSTICS
• DISABLING & ACTIVATING AIR BAG SYSTEM
• SYSTEM OPERATION CHECK
• TORQUE SPECIFICATIONS
• CODING AIR BAG CONTROL MODULE
• STEERING WHEEL
• CENTERING SPIRAL SPRING
• DIAGNOSTIC TESTS