Supplemental Inflatable Restraint System Buick LeSabre VIII

DESCRIPTION & OPERATION

Supplemental Inflatable Restraint (SIR) system is designed to supplement protection provided by driver-side and passenger-side seat belts. A frontal crash of sufficient force up to 30 degrees off center line of vehicle will deploy driver-side and passenger-side air bag modules. Steering column and knee bolsters below instrument panel also absorb crash energy. Driver-side and passenger-side air bag modules are dual stage air bag modules. Stage 1 will deploy during moderate frontal collisions. More severe frontal collisions will result in a full stage deployment, where both Stage 1 and Stage 2 sections of air bag module are deployed.

Side impact air bag system supplements protection offered by doors and vehicle structure. When a side impact of sufficient force occurs, side impact air bag system deploys a single stage air bag module from driver or front passenger's seat on side of impact.

SIR system consists of Sensing and Diagnostic Module (SDM), driver-side and passenger-side dual stage air bag modules, left and right side impact air bag modules, left and right Side Impact Sensors (SIS), SIR coil assembly, Electronic Frontal Sensor (EFS) and AIR BAG warning light.

AIR BAG MODULES

Air bag modules consist of an inflatable bag and inflator. When vehicle is in an accident of sufficient force, SDM causes current flow through deployment loops. Current passing through modules ignites inflator charges, producing gas which rapidly inflates air bags.

AIR BAG WARNING LIGHT

When ignition switch is first turned on, AIR BAG warning light will flash 7 times, during which time SDM will inspect SIR system for malfunctions. If no malfunctions are found, AIR BAG warning light will turn off. During vehicle operation, AIR BAG warning light warns driver of malfunctions which could potentially affect SIR system operation.

ELECTRONIC FRONTAL SENSOR (EFS)

EFS provides input to SDM as to severity of impact. EFS is not part of the air bag module deployment loops.

KNEE BOLSTERS

Knee bolsters are used to absorb energy and control forward movement of driver and front seat passenger by limiting leg movement during a frontal crash.

SENSING & DIAGNOSTIC MODULE (SDM)

SDM monitors vehicle velocity changes to detect frontal crashes which are severe enough to warrant SIR system deployment. When a frontal or side crash of sufficient force is detected, SDM causes current to flow through applicable air bag module deployment loops causing air bag module deployment. SDM maintains a 23 Volt Loop Reserve (23 VLR) energy supply to provide deployment energy for up to one minute after loss of ignition voltage.

SDM provides diagnostic monitoring of SIR system electrical components. When a malfunction is detected, SDM sets a Diagnostic Trouble Code (DTC) which can be retrieved using a scan tool. SDM warns driver of system malfunctions by controlling AIR BAG warning light.

SIDE IMPACT SENSOR (SIS)

Left and right SIS's monitor vehicle acceleration and velocity changes to detect side impact crashes severe enough to warrant deployment of applicable side impact air bag module. SDM sends deployment signal to appropriate side impact air bag during a side impact.

SIR COIL ASSEMBLY

SIR coil assembly consists of 4 current-carrying coils. SIR coil is attached to steering column and allows rotation of steering wheel, while maintaining continuous continuity of driver-side air bag deployment loop.

COMPONENT LOCATIONS

COMPONENT LOCATIONS

SYSTEM OPERATION CHECK

If system is functioning normally, AIR BAG warning light flashes 7 times and then turns off when ignition switch is turned on. System malfunction is indicated when light does not illuminate at all, light comes on while vehicle is driven, light flashes 7 times and remains on, or light does not flash but remains on when ignition switch is turned on.

AIR BAG SAFETY PRECAUTIONS

Observe these precautions when servicing the air bag system

1. SDM maintains sufficient voltage to cause air bag deployment for up to one minute after ignition switch is turned off, battery is disconnected or fuse powering SDM is removed. In order to begin servicing immediately, air bag modules must be removed from deployment loop. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system) .
2. Driver-side and passenger-side air bag modules are dual stage air bags. DO NOT assume that both stages of a dual stage air bag module have deployed.
3. Always deploy both stages of a dual stage air bag module during disposal procedures. Even though air bag may appear to have deployed, both stages of air bag may not have been activated.
4. After repairs, ensure AIR BAG warning light is working properly and no system faults are indicated. See «SYSTEM OPERATION CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__system-operation-check) .
5. Always wear safety glasses when servicing or handling an air bag module.
6. Air bag modules must be stored in original special containers until used for service. Store in a clean, dry place, away from sources of extreme heat, sparks, or high electrical energy.
7. SIR components should not be subjected to temperatures greater than 150°F (65°C).
8. SIR components should not be used if they have been dropped from a height of 3 feet (0.9 m) or greater.
9. When placing a live air bag module on a bench or other surface, always make certain that trim cover faces up. This will reduce motion of module if accidentally deployed.
10. After deployment, air bag surface may contain deposits of sodium hydroxide, which can irritate skin. Always wear safety glasses, rubber gloves and long-sleeved shirt during clean-up, and wash hands using mild soap and water. Follow correct disposal procedures. See «DISPOSAL PROCEDURES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disposal-procedures) .
11. At no time should any electrical source be allowed near inflator on back of air bag module.
12. DO NOT apply power to SIR system unless all components are connected or a diagnostic test requests it, as this will set a diagnostic trouble code.
13. When carrying a live air bag module, trim cover should be pointed away from body to minimize injury in case of accidental deployment.
14. DO NOT attempt to service any SIR component. Defective SIR components must be replaced.
15. DO NOT probe a wire through insulator. Wire will be damaged and eventually fail due to corrosion.
16. When performing electrical tests, prevent accidental shorting of terminals. Such mistakes can damage fuses or components and may cause a second fault code to set, making diagnosis of original problem more difficult.
17. When using diagnostic tests to diagnose SIR system, under no circumstances should a volt/ohmmeter, test light or any type of electrical equipment not specified by manufacturer be used.
18. If SIR system is not fully functional for any reason, vehicle should not be driven until system is repaired. DO NOT remove bulbs, modules, sensors or other components or in any way disable system from operating normally.

With Centering Window & Service Lock

Hold SIR coil face up. (Scheme 53) While depressing service lock, rotate coil hub clockwise until it stops. Rotate coil hub counterclockwise slowly until centering window appears Yellow and line-up marks are aligned. Release service lock.

With Centering Window & No Service Lock

Hold SIR coil face up. (Scheme 53) Rotate coil hub clockwise until it stops. Rotate coil hub counterclockwise slowly until centering window appears Yellow and both line-up marks are aligned. Prevent coil hub from moving until installed on steering column.

With Service Lock & No Centering Window

Hold SIR coil assembly with rear side facing up. (Scheme 53) While depressing service lock, rotate coil hub in direction indicated by directional arrow until it stops. Rotate coil hub in opposite direction 2 1/2 turns. Release service lock.

Without Centering Window Or Service Lock

Hold SIR coil assembly face up. (Scheme 53) Rotate coil hub in direction of arrow until it stops. Rotate coil hub in opposite direction 2 1/2 turns. Prevent coil hub from moving until installed on steering column.

Scheme 53

DISABLING & ACTIVATING AIR BAG SYSTEM

DISABLING SYSTEM

Note. When SIR fuse is removed and ignition is on, AIR BAG warning light will be on. This does not indicate a system malfunction.

1. Turn steering wheel to place vehicle wheels in straight-ahead position. Turn ignition off and remove key.
2. Remove SIR fuse from rear junction block, located under rear seat. Remove driver-side knee bolster. Remove Connector Position Assurance (CPA) clip and disconnect driver-side air bag module connector. (Scheme 54)
3. Remove passenger-side knee bolster. Remove CPA clip and disconnect passenger-side air bag module connector. (Scheme 55) Remove CPA clip and disconnect driver side impact air bag module connector. (Scheme 56) Remove CPA clip and disconnect passenger side impact air bag module connector.

Scheme 54

Scheme 55

Scheme 56

ACTIVATING SYSTEM

1. Remove key from ignition switch. Connect side impact air bag module connectors located under front seats and install CPA clips. (Scheme 56) Connect passenger-side air bag module connector and install CPA clip. (Scheme 55)
2. Connect driver-side air bag module connector and install CPA clip. (Scheme 54) Install knee bolsters. Install SIR fuse in junction block. Install rear seat. Check SIR system for proper operation. See «SYSTEM OPERATION CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__system-operation-check).

DISPOSAL PROCEDURES

Note. If vehicle is to be scrapped, perform on-vehicle air bag deployment procedure. See ON-VEHICLE DEPLOYMENT . If vehicle is remaining in service, preform off-vehicle deployment procedure. See OFF-VEHICLE DEPLOYMENT .

ON-VEHICLE DEPLOYMENT

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Turn ignition switch off, remove key and put on safety glasses. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Cut air bag module harness connectors from vehicle leaving at least 6" (152 mm) of wire at the connector for each wire lead. Strip 0.50" (13 mm) of insulation from each wire lead. Cut 2 deployment wires at least 20 feet (6.1 m) long from 18-gauge multi-strand wire. Strip 0.50" (13 mm) of insulation from each connector wire lead. Twist wires together at one end to short.
3. For driver-side and passenger-side air bag module leads, twist together wires for Stage 1 and Stage 2 high-side deployment loops. See «WIRING DIAGRAMS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system). Connect twisted wire pair to end of one deployment wire. (Scheme 57) Bend twisted connection flat and wrap tightly with electrical tape to insulate. Repeat procedure for Stage 1 and Stage 2 low-side deployment loop leads.
4. For side impact air bag module leads, connect lead from connector wire to end of each deployment wire. (Scheme 58) Bend twisted connection flat and wrap tightly with electrical tape to insulate. Repeat for remaining connector wire lead.
5. Remove all loose objects from front seat. Ensure no one is in vehicle. Connect deployment harness to driver-side air bag module connector. Stretch wires away from car as far as possible. Cover windshield and front door openings with a drop cloth. Separate wire ends. Connect wires to a 12-volt battery. Air bag module should deploy. If air bag module does not deploy, go to step 7. If air bag module did deploy, disconnect wires from battery. DO NOT touch metal surfaces of air bag module for at least 10 minutes due to heat generated during deployment.
6. Repeat steps 2 through 5 for passenger-side and side impact air bag modules. (Scheme 57)& (Scheme 58). Wear gloves and safety glasses when handling deployed air bag modules. Wash hands with mild soap and water.
7. If air bag modules did not deploy, carefully remove from vehicle. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Temporarily store module with trim cover facing up. Contact manufacturer for additional instructions.

Scheme 57

Scheme 58

OFF-VEHICLE DEPLOYMENT

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Turn ignition off and remove key. Put on safety glasses.
2. Short 2 SIR Deployment Harness (J-38826) leads together by fully seating one banana plug into the other. Connect appropriate pigtail adapter to SIR deployment harness. (Scheme 59) Remove driver-side air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION.
3. Place driver-side air bag module on ground (preferably paved outdoor surface) at least 6 feet (1.8 m) away from any people or objects. Stretch SIR deployment harness and pigtail adapter from air bag module to its full length. Place a 12-volt battery near shorted end of SIR deployment harness.
4. Connect driver-side air bag module to SIR deployment harness using Deployment Adapter (J-38826-75). Ensure area around air bag module is clear of people and objects. Verify that air bag module is resting with trim cover facing up.
5. Separate 2 banana plugs on SIR deployment harness. Connect SIR deployment harness wires to battery. Driver-side air bag module should deploy. If air bag module did not deploy, go to step 7. If air bag module did deploy, disconnect SIR deployment harness from battery. Short 2 SIR deployment harness leads together. DO NOT touch metal surfaces of air bag module for at least 10 minutes due to heat generated during deployment. Wear gloves and safety glasses when handling deployed air bag module. Wash hands with mild soap and water after handling. Dispose of deployed air bag module like any other part. Inspect pigtail adapter and SIR deployment harness for damage after each use.
6. Using SIR Deployment Tool (J-39401-B) to hold passenger-side and side impact air bag modules, repeat deployment procedure for passenger-side air bag using Deployment Adapter (J-38826-80) and side impact air bag modules using Deployment Adapter (J-38826-25).
7. Ensure that SIR deployment harness is disconnected from battery and that 2 banana plugs have been shorted together. Disconnect pigtail adapter from air bag module. Temporarily store air bag module with trim cover facing up. Contact manufacturer for additional instructions.

Scheme 59

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

Removal & Installation (Driver-side)

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Turn ignition on. Turn steering wheel so that 2 of the 4 holes on back of steering wheel are accessible. Install Air Bag Module Remover (J-44248) into holes. (Scheme 60) Push Air Bag Remover back towards instrument panel to release spring clips. Turn steering wheel 180 degrees and repeat procedure for remaining 2 spring clips.
3. Remove cruise control lever cover and cruise control lever using one finger of air bag module remover to release spring locks. Pull driver-side air bag module away from steering wheel.
4. Remove both Connector Position Assurance (CPA) clips from driver-side air bag connectors and disconnect connectors. (Scheme 61) Remove horn ground lead from steering wheel. Turn horn contact lead 1/4 turn counterclockwise to release from steering wheel. Remove horn contact lead from steering column cam tower. Remove driver-side air bag module.
5. To install, reverse removal procedure. Ensure wires are not pinched during assembly. Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system). Check system for proper operation. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system).

Removal & Installation (Passenger-side)

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Remove passenger-side knee bolster. Remove Connector Position Assurance (CPA) clip from passenger-side air bag module connector and disconnect connector. (Scheme 55) Remove instrument panel upper trim pad. See «INSTRUMENT PANEL UPPER TRIM PAD»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system). Remove passenger-side air bag module bolts. Remove passenger-side air bag module. (Scheme 62)
3. To install, reverse removal procedure. Tighten passenger-side air bag module bolts and trim pad screws to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system.

Removal & Installation (Side Impact)

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Move seat to full forward position. Remove seatbelt post rear cover from front cover. Unzip seat cover zipper completely to gain access to side impact air bag module. Remove top and bottom nuts securing air bag module to seat frame. (Scheme 63) Remove Connector Position Assurance (CPA) clip from side impact air bag module connector and disconnect connector. Remove side impact air bag module from seat.
3. To install, reverse removal procedure. Tighten side impact air bag module nuts to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).

Scheme 60

Scheme 61

Scheme 62

Scheme 63

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions) . Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system) .
2. Remove Instrument Panel Cluster (IPC). See «INSTRUMENT PANEL CLUSTER (IPC)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) . Remove console tray insert. Remove console trim plate. Disconnect shifter cable. Disconnect shifter lock cable. Disconnect console wire harness connector. Remove upper screws attaching center console to instrument panel. Remove lower screws attaching center console to floor. Slide console rearward to remove.
3. To install, reverse removal procedure. Tighten upper and lower center console screws to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications) . Activate air bag system.

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Remove front air deflector. Remove Connector Position Assurance (CPA) clip from EFS connector and disconnect connector. (Scheme 64) Remove EFS mounting bolt from underside of crossmember. Remove EFS.
3. To install, reverse removal procedure. Tighten EFS mounting bolt to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system

Scheme 64

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions) . Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system) .
2. Remove IPC cluster trim. Release 5 IPC pins. Pull IPC rearward and to the right to remove. To install, reverse removal procedure. Activate air bag system

Removal & Installation (With Heads Up Display)

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Remove Instrument Panel Cluster (IPC) trim plate. Remove defroster grille. Remove left and right instrument panel end covers. Remove screws from instrument panel trim pad. (Scheme 65) Lift upper trim pad and pull rearward at an angle to detach from instrument panel. Disconnect sunload sensor connector. Remove upper trim pad.
3. To install, reverse removal procedure. Tighten upper trim pad screws to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system.

Removal & Installation (Without Heads Up Display)

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Remove defroster grille. Remove left and right A-pillar trim. Remove left and right instrument panel end covers. Remove screws from instrument panel trim pad. (Scheme 66) Lift upper trim pad and pull rearward at an angle to detach from instrument panel. Disconnect sunload sensor connector. Remove upper trim pad.
3. To install, reverse removal procedure. Tighten upper trim pad screws to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system.

Scheme 65

Scheme 66

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Remove bench seat. Remove center console. See «CENTER CONSOLE»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system). Gain access to SDM through slit in carpet. Remove Connector Position Assurance (CPA) clip from SDM connector and disconnect connector. (Scheme 67) Remove SDM bolts. Remove SDM.
3. To install, reverse removal procedure. Tighten SDM bolts and seat bolts to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system.

Scheme 67

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Move front seat fully forward. Remove applicable B-pillar trim. Remove Connector Position Assurance (CPA) clip from SIS sensor and disconnect connector. (Scheme 68) Remove SIS bolts. Remove SIS from B-pillar.
3. To install, reverse removal procedure. Tighten SIS bolts to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications). Activate air bag system.

Scheme 68

Note. New coil assemblies are pre-centered and included a centering tab that is removed once coil is installed.

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions). Ensure front wheels face straight ahead. Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system).
2. Remove driver-side air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system). Remove steering wheel. See «STEERING WHEEL»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system). Remove tilt lever by pulling straight out, away from steering column. Remove upper and lower steering column covers. (Scheme 69)
3. Remove harness straps attaching SIR coil wire harness to steering column. Disconnect SIR coil electrical connectors. Remove retaining ring. Remove SIR coil from steering column. Remove wave washer.
4. To install, reverse removal procedure. If necessary, center SIR coil assembly. See «CENTERING SIR COIL ASSEMBLY»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under ADJUSTMENTS. Tighten upper and lower steering column screws and steering wheel nut to specification. Activate air bag system.

Scheme 69

1. Before proceeding, see «AIR BAG SAFETY PRECAUTIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__air-bag-safety-precautions) . Disable air bag system. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__disabling-activating-air-bag-system) .
2. Remove driver-side air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) . Remove steering wheel nut. Make mark on steering shaft and steering wheel to ensure proper alignment during installation. Using Steering Wheel Puller (J-1859-A) and Steering Wheel Puller Legs (J-42578), remove steering wheel.
3. To install, reverse removal procedure. Tighten steering wheel nut to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__torque-specifications) . Activate air bag system.

DIAGNOSTICS

DIAGNOSTIC TROUBLE CODES (DTC'S)

Sensing & Diagnostic Module (SDM) provides a record of DTC's, stored according to type. SDM performs diagnostic monitoring of SIR system electrical components and sets a diagnostic trouble code (DTC) when a malfunction is detected. Current DTC's are stored in SDM and are erased when fault is corrected. Current DTC's can be read using a scan tool such as Tech 2.

SCAN TOOL DIAGNOSTICS

Scan Tool (Tech 2) reads and clears current and history codes. Ensure scan tool contains correct software cartridge for SIR diagnostics. To use connect scan tool to DLC connector, located near base of steering column, plug in power source and turn the ignition switch to ON position. Follow scan tool manufacturer instructions for communication with SIR system.

DIAGNOSTIC PROCEDURES

Diagnostic procedures are designed to find and repair SIR malfunctions. It is important to use diagnostic tests and follow sequence listed below.

Perform SIR Diagnostic System Check

SIR diagnostic system check should always be starting point for any SIR diagnostics. It checks for proper AIR BAG warning light operation and SIR trouble codes using both flash code and scan tool methods. See SIR DIAGNOSTIC SYSTEM CHECK under DIAGNOSTIC TESTS.

Refer To Proper Diagnostic Test

SIR diagnostic system check indicates correct test to diagnose SIR problems. Bypassing procedures may result in extended diagnostic time, incorrect diagnosis and incorrect parts replacement.

Repeat SIR Diagnostic System Check

Performing SIR diagnostic system check after all repair or diagnostic procedures ensures that repair has been made correctly and that no other conditions exist.

SIR DIAGNOSTIC SYSTEM CHECK

Diagnostic Procedure

1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
2. Observe AIR BAG warning light when turning ignition on. If AIR BAG warning light flashes 7 tunes, go to next step. If AIR BAG warning light does not flash 7 times, check for malfunctioning data link communication circuits, addition of aftermarket accessories or damage to vehicle. Carefully inspect vehicle for signs of damage or conditions that could cause poor or intermittent electrical connections to AIR BAG warning light circuit. If no visible damage is found, go to «AIR BAG WARNING LIGHT CIRCUIT MALFUNCTION»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) .
3. Install scan tool to Data Link Connector (DLC), located below left side of instrument panel. If scan tool powers up, go to next step. If scan tool does not power up, inspect and repair data link communication circuits.
4. If scan tool communicates with Sensing and Diagnostic Module (SDM), go to next step. If scan tool does not communicate with SDM, inspect and repair data link communication circuits.
5. Select SIR DTC display on scan tool. If scan tool displays DTC's, go to next step. If scan tool displays history or current DTC's, go to next step. If scan tool does not display DTC's, system is normal.
6. If scan tool displays DTC's that start with "U", inspect and repair data link communication circuits. If scan tool displays DTC B1000, go to «DTC B1000: INTERNAL SDM FAILURE»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) . If scan tool displays other DTC's, perform appropriate diagnostic procedures. See «DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) table.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

CONNECTOR IDENTIFICATION

Note. Refer to illustrations to identify SIR connector terminals. (Scheme 70)- (Scheme 75).

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

Circuit Description

Ignition switch supplies voltage to Sensing and Diagnostic Module (SDM) via SIR fuse. Instrument Panel Cluster (IPC) receives voltage from SDM. AIR BAG warning light is controlled by SDM via Class 2 serial data circuit. When ignition is turned on, AIR BAG warning light will flash 7 times while SDM checks SIR system for malfunctions. If no malfunctions exist, AIR BAG warning light will then go off.

Diagnostic Aids

If battery voltage is outside normal operating range, AIR BAG warning light will turn on with no DTC's set.

1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
2. Using scan tool, establish communication with SDM. Request SIR data list. If ignition voltage is 9-16 volts, go to next step. If voltage is not 9-16 volts, check battery and charging system.
3. Using scan tool, request SPECIAL FUNCTIONS in INSTRUMENT PANEL CLUSTER. Select WOW INSTRUMENT CLUSTER in OUTPUT CONTROL. (In WOW mode, instrument panel cluster indicator lights can be turned on and off). Using scan tool, turn instrument panel cluster indicator lights on and off. If AIR BAG warning light turns on and off, go to next step. If AIR BAG warning light does not turn on and off, go to step 5 .
4. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
5. Replace Instrument Panel Cluster (IPC). Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .

When ignition is turned on, Sensing and Diagnostic Module (SDM) performs tests on deployment loops to check for circuit continuity and shorts to ground or voltage.

Conditions For Setting DTC

DTC B0012 will set when Stage 2 deployment loop resistance is less than 1.3 ohms for 500 milliseconds. DTC B0013 will set when Stage 2 deployment loop high-side voltage is less than 2.4 volts and deployment loop resistance is more than 6 ohms for 500 milliseconds or when deployment loop resistance is more than 4.8 ohms for 500 milliseconds. DTC B0014 will set when Stage 2 deployment loop high-side or low-side circuits are shorted to ground or voltage for 500 milliseconds or when high-side circuit voltage is less than 2.4 volts and deployment loop resistance is less than 6 ohms for 500 milliseconds.

DTC B0016 will set when deployment loop resistance is less than 1.3 ohms for 500 milliseconds. DTC B0017 will set when deployment loop high-side voltage is less than 2.4 volts and deployment loop resistance is more than 6 ohms for 500 milliseconds or when deployment loop resistance is more than 4.8 ohms for 500 milliseconds. DTC B0018 will set when deployment loop high-side or low-side circuits are shorted to ground or voltage for 500 milliseconds or when high-side circuit voltage is less than 2.4 volts and deployment loop resistance is less than 6 ohms for 500 milliseconds.

Action Taken

SDM turns on AIR BAG warning light and sets DTC.

Conditions For Clearing DTC

Current DTC clears when condition responsible for setting DTC no longer exists and scan tool CLEAR DTC command has been used to clear DTC's. History DTC clears when 255 malfunction-free ignition cycles have occurred.

Malfunction is likely to be caused by a short between circuits 3024 and 3025 or 3026 and 3027 or by an open or high resistance condition or by a short to ground or voltage in any circuit. A malfunctioning electrical connector or SDM could also cause condition.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).
2. Turn ignition off. Disconnect passenger-side air bag module connector, located under passenger-side instrument panel. (Scheme 55) If harness-side of connector is damaged, go to next step. If passenger-side air bag module side of connector is damaged, go to step 7. If both sides of connector are okay, go to step 4.
3. Replace harness-side of connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 9.
4. Install SIR Driver/Passenger Load Tool (J-38715-A) using Load Tool Adapter (J-38715-80) to harness-side of passenger-side air bag module connector. Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0012, B0013, B0014, B0016, B0017 or B0018 is retrieved as a current code, go to next step. If DTC B0012, B0013, B0014, B0016, B0017 or B0018 is not retrieved as a current code, go to step 7.
5. Turn ignition off. Remove SIR driver/passenger load tool and adapter from harness connector. Disconnect SDM connector. (Scheme 67) If SDM connector is okay, go to next step. If SDM connector shows signs of corrosion or damage, replace SDM connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 9. NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
6. When diagnosing air bag system: If DTC B0012 or B0016 is retrieved by scan tool, check for a short between circuits 3026 and 3027 or 3024 and 3025. If condition is found and corrected, go to step 9. If condition is not found, go to step 8. If DTC B0013 or B0017 is retrieved, check for an open or high resistance in circuits 3026 and 3027 or 3024 and 3025. If condition is found and corrected, go to step 9. If condition is not found, go to step 8. If DTC B0014 or B0018 is retrieved, check for a short to ground or voltage in circuits 3026 and 3027 or 3024 and 3025. If condition is found and corrected, go to step 9. If condition is not found, go to step 8.
7. Replace passenger-side air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 9.
8. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
9. Reconnect all SIR components. Ensure all components are properly mounted. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If current DTC is retrieved by scan tool, go to step 2. If current DTC is not retrieved by scan tool, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).

When ignition is turned on, Sensing and Diagnostic Module (SDM) performs tests on deployment loops to check for circuit continuity and shorts to ground or voltage.

DTC B0022 will set when Stage 1 deployment loop resistance is less than 1.3 ohms for 500 milliseconds. DTC B0024 will set when Stage 1 deployment loop high-side or low-side circuits are shorted to ground or voltage for 500 milliseconds or when high-side voltage is less than 2.4 volts and deployment loop resistance is less than 6 ohms for 500 milliseconds. DTC B0026 will set when Stage 1 deployment loop high-side voltage is less than 2.4 volts and deployment loop resistance is more than 6 ohms for 500 milliseconds or when deployment loop resistance is more than 4.8 ohms for 500 milliseconds.

DTC B0042 will set when Stage 2 deployment loop resistance is less than 1.3 ohms for 500 milliseconds. DTC B0043 will set when Stage 2 deployment loop high-side or low-side circuits are shorted to ground or voltage for 500 milliseconds or when high-side voltage is less than 2.4 volts and deployment loop resistance is less than 6 ohms for 500 milliseconds. DTC B0044 will set when Stage 2 deployment loop high-side voltage is less than 2.4 volts and deployment loop resistance is more than 6 ohms for 500 milliseconds or when deployment loop resistance is more than 4.8 ohms for 500 milliseconds.

SDM turns on AIR BAG warning light and sets DTC.

Current DTC clears when condition responsible for setting DTC no longer exists and scan tool CLEAR DTC command has been used to clear DTC's. History DTC clears when 255 malfunction-free ignition cycles have occurred.

Malfunction is likely to be caused by a short between circuits 3020 and 3021 or 3022 and 3023 or by an open or high resistance condition or by a short to ground or voltage in any circuit. A malfunctioning electrical connector or SDM could also cause condition.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).
2. Turn ignition off. Disconnect driver-side air bag module connector, located at base of steering column. (Scheme 54) If harness-side of connector is damaged, go to next step. If SIR coil side of connector is damaged, go to step 9. If both sides of connector are okay, go to step 4.
3. Replace harness-side of connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 11.
4. Install SIR Driver/Passenger Load Tool (J-38715-A) to harness-side of connector using Load Tool Adapter (J-38715-80). Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0022, B0024, B0026, B0042, B0043 or B0044 is retrieved as a current code, go to step 6. If DTC B0022, B0024, B0026, B0042, B0043 or B0043 is not retrieved as a current code, go to next step.
5. Remove SIR driver/passenger load tool from harness-side of connector. Reconnect driver-side air bag Yellow 2-pin connector. Remove driver-side air bag module. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Install SIR driver/passenger load tool using Load Tool Adapter (J-38715-120) to upper SIR coil connector. Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0022, B0024, B0026, B0042, B0043 or B0043 is retrieved as a current code, go to 9. If DTC B0022, B0024, B0026, B0042, B0043 or B0043 is not retrieved as a current code, go to 8.
6. Turn ignition off. Remove SIR driver/passenger load tool from harness connector. Disconnect SDM connector. (Scheme 67) If SDM connector is okay, go to next step. If SDM connector shows signs of corrosion or damage, replace SDM connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 11. NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
7. When diagnosing air bag system: If DTC B0022 or B0042 is retrieved by scan tool, check for a short between circuits 3020 and 3021 or 3022 and 3023. If condition is found and corrected, go to step 11. If condition is not found, go to step 10. If DTC B0024 or B0043 is retrieved, check for a short to ground or voltage in circuits 3020, 3021, 3022 and 3023. If condition is found and corrected, go to step 11. If condition is not found, go to step 10. If DTC B0026 or B0044 is retrieved, check for an open or high resistance in circuits 3020, 3021, 3022 and 3023. If condition is found and corrected, go to step 11. If condition is not found, go to step 10.
8. Turn ignition off. Replace driver-side air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 11.
9. Replace SIR coil. See «SIR COIL ASSEMBLY»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 11.
10. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
11. Reconnect all SIR components. Ensure all components are properly mounted. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If current DTC is retrieved by scan tool, go to step 2. If current DTC is not retrieved by scan tool, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).

When ignition is turned on, Sensing and Diagnostic Module (SDM) performs tests on deployment loops to check for circuit continuity and shorts to ground or voltage.

DTC B0028 will set when deployment loop resistance is less than 1.3 ohms for 500 milliseconds. DTC B0029 will set when deployment loop high-side voltage is less than 2.4 volts and deployment loop resistance is more than 6 ohms for 500 milliseconds or when deployment loop resistance is more than 4.8 ohms for 500 milliseconds. DTC B0030 will set when deployment loop high-side or low-side circuits are shorted to ground or voltage for 500 milliseconds or when high-side circuit voltage is less than 2.4 volts and deployment loop resistance is less than 6 ohms for 500 milliseconds.

SDM turns on AIR BAG warning light and sets DTC.

Current DTC clears when condition responsible for setting DTC no longer exists and scan tool CLEAR DTC command has been used to clear DTC's. History DTC clears when 255 malfunction-free ignition cycles have occurred.

Malfunction is likely to be caused by a short between circuits 2103 or 2104 or by an open or high resistance condition or by a short to ground or voltage in either circuit. A malfunctioning electrical connector or SDM could also cause condition.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).
2. Turn ignition off. Disconnect passenger side impact air bag module connector, located under passenger-side front seat. (Scheme 56) If harness-side of connector is damaged, go to next step. If passenger side impact air bag module side of connector is damaged, go to step 4. If both sides of connector are okay, go to step 5.
3. Replace harness-side connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 12.
4. Replace side impact air bag module wiring harness between under seat connector and passenger side impact air bag module. Go to step 12.
5. Install SIR Driver/Passenger Load Tool (J-38715-A) to harness-side of passenger side impact air bag module wire harness, located under front seat. Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0028, B0029 or B0030 is retrieved as a current code, go to step 7. If DTC B0028, B0029 or B0030 is not retrieved as a current code, go to next step.
6. Turn ignition off. Remove SIR driver/passenger load tool from harness connector. Connect passenger side impact air bag module under seat connector. Disconnect passenger side impact air bag module connector, located in seat back. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Install load tool using Load Tool Adapter (J-38715-30A) to harness side of connector. Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0028, B0029 or B0030 is retrieved as a current code, go to step 9. If DTC B0028, B0029 or B0030 is not retrieved as a current code, go to step 10.
7. Turn ignition off. Remove load tool and load tool adapter from connector. Disconnect SDM connector. (Scheme 67) If SDM connector shows signs of corrosion or damage, replace SDM connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 12. If SDM connector is okay, go to next step. NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
8. When diagnosing air bag system: If DTC B0028 is retrieved by scan tool, check for a short between circuits 2103 and 2104. If condition is found and corrected, go to step 12. If condition is not found, go to step 11. If DTC B0029 is retrieved, check for an open or high resistance in circuits 2103 or 2104. If condition is found and corrected, go to step 12. If condition is not found, go to step 11. If DTC B0030 is retrieved, check for a short to ground or voltage in circuits 2103 or 2104. If condition is found and corrected, go to step 12. If condition is not found, go to step 11.
9. Replace wire harness between under seat connector and passenger side impact air bag module connector. Go to step 12.
10. Replace side impact air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 12.
11. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
12. Reconnect all SIR components. Ensure all components are properly mounted. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If current DTC is retrieved by scan tool, go to step 2. If current DTC is not retrieved by scan tool, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).

When ignition is turned on, Sensing and Diagnostic Module (SDM) performs tests on deployment loops to check for circuit continuity and shorts to ground or voltage.

DTC B0040 will set when deployment loop resistance is less than 1.3 ohms for 500 milliseconds. DTC B0041 will set when deployment loop high-side voltage is less than 2.4 volts and deployment loop resistance is more than 6 ohms for 500 milliseconds or when deployment loop resistance is more than 4.8 ohms for 500 milliseconds. DTC B0045 will set when deployment loop high-side or low-side circuits are shorted to ground or voltage for 500 milliseconds or when high-side circuit voltage is less than 2.4 volts and deployment loop resistance is less than 6 ohms for 500 milliseconds.

SDM turns on AIR BAG warning light and sets DTC.

Current DTC clears when condition responsible for setting DTC no longer exists and scan tool CLEAR DTC command has been used to clear DTC's. History DTC clears when 255 malfunction-free ignition cycles have occurred.

Malfunction is likely to be caused by a short between circuits 2105 or 2106 or by an open or high resistance condition or by a short to ground or voltage in either circuit. A malfunctioning electrical connector or SDM could also cause condition.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).
2. Turn ignition off. Disconnect driver side impact air bag module connector, located under driver-side front seat. (Scheme 56) If harness-side of connector is damaged, go to next step. If driver side impact air bag module side of connector is damaged, go to step 4. If both sides of connector are okay, go to step 5.
3. Replace harness-side connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 12.
4. Replace side impact air bag module wiring harness between under seat connector and driver side impact air bag module. Go to step 12.
5. Install SIR Driver/Passenger Load Tool (J-38715-A) to harness-side of driver side impact air bag module wire harness, located under front seat. Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0040, B0041 or B0045 is retrieved as a current code, go to step 7. If DTC B0040, B0041 or B0045 is not retrieved as a current code, go to next step.
6. Turn ignition off. Remove SIR driver/passenger load tool from harness connector. Connect driver side impact air bag module under seat connector. Disconnect driver side impact air bag module connector, located in seat back. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Install load tool using Load Tool Adapter (J-38715-30A) to harness side of connector. Turn ignition on. Using scan tool, check for SIR DTC's. If DTC B0040, B0041 or B0045 is retrieved as a current code, go to step 9. If DTC B0040, B0041 or B0045 is not retrieved as a current code, go to step 10.
7. Turn ignition off. Remove load tool and load tool adapter from connector. Disconnect SDM connector. (Scheme 67) If SDM connector shows signs of corrosion or damage, replace SDM connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 12. If SDM connector is okay, go to next step. NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
8. When diagnosing air bag system: If DTC B0040 is retrieved by scan tool, check for a short between circuits 2105 and 2106. If condition is found and corrected, go to step 12. If condition is not found, go to step 11. If DTC B0041 is retrieved, check for an open or high resistance in circuits 2105 and 2106. If condition is found and corrected, go to step 12. If condition is not found, go to step 11. If DTC B0045 is retrieved, check for a short to ground or voltage in circuits 2105 and 2106. If condition is found and corrected, go to step 12. If condition is not found, go to step 11.
9. Replace wire harness between under seat connector and driver side impact air bag module connector. Go to step 12.
10. Replace side impact air bag module. See «AIR BAG MODULES»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 12.
11. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
12. Reconnect all SIR components. Ensure all components are properly mounted. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If current DTC is retrieved by scan tool, go to step 2. If current DTC is not retrieved by scan tool, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).

Sensing and Diagnostic Module (SDM) contains a sensing device which converts vehicle velocity changes into an electrical signal. Signal is processed by SDM and compared to a value stored in memory. When signal exceeds stored value, additional signal processing is performed and signals are compared to values stored in memory. When 2 signals exceed stored values, SDM causes current to flow through air bag modules, deploying air bags and causing DTC B0051 to set.

DTC sets when ignition voltage is present and SDM has commanded deployment of air bags.

SDM sets DTC, turns on AIR BAG warning light and records crash data.

DTC B0051 is a latched code and cannot be cleared. Replace SDM only after completion of diagnostic procedure and applicable repairs.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
2. Turn ignition off. If air bags have deployed, go to step 5 . If air bags have not deployed, go to next step.
3. Inspect front of vehicle and undercarriage for signs of impact. If impact has occurred, go to step 5 . If no impact has occurred, go to next step.
4. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 6 .
5. Using scan tool, request SIR DTC display. If history DTC's are retrieved, go to diagnostic aids for specific displayed DTC. If history DTC's are not displayed, replace components and perform inspections as required following an accident. See «POST-COLLISION INSPECTION»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__post-collision-inspection) . Go to next step.
6. Reconnect all SIR components. Using scan tool, clear DTC's. Road test vehicle, then check for DTC's. If DTC is retrieved, go to step 2 . If DTC is not retrieved, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .

Sensing and Diagnostic Module (SDM) contains a sensing device which converts vehicle velocity changes into an electrical signal. Signal is processed by SDM and compared to a value stored in memory. When signal exceeds stored value, additional signal processing is performed and signals are compared to values stored in memory. When 2 signals exceed stored values, SDM causes current to flow through air bag modules, deploying air bags. DTC B0053 will set instead of DTC B0051 when a deployment occurs while an inflator circuit fault exists that could result in a non-deployment situation in one or both air bag modules.

DTC will set when SDM detects a frontal or side collision of sufficient force to warrant deployment of air bags and deployment loop malfunction exists.

SDM sets DTC, turns on AIR BAG warning light and records crash data.

DTC B0053 is a latched code which cannot be cleared. Replace SDM only after completion of diagnostic procedure and applicable repairs.

DTC B0053 will be accompanied by one or more other DTC's. Replace SDM only after completion of diagnostic procedure and applicable repairs.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
2. Turn ignition off. If air bags have deployed, go to step 5 . If air bags have not deployed, go to next step.
3. Inspect front of vehicle and undercarriage for signs of impact. If impact has occurred, go to step 5 . If no impact has occurred, go to next step.
4. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to step 6 .
5. Using scan tool, request SIR DTC display. If history DTC's are retrieved, go to diagnostic aids for specific displayed DTC. If history DTC's are not displayed, replace components and perform inspections as required following an accident. See «POST-COLLISION INSPECTION»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__post-collision-inspection) . Go to next step.
6. Reconnect all SIR components. Using scan tool, clear DTC's. Road test vehicle, then check for DTC's. If DTC is retrieved, go to step 2 . If DTC is not retrieved, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .

Side Impact Sensor (SIS) uses a unidirectional 2-wire circuit. SIS modulates current on the interface to send identification, State Of Health (SOH) and deployment commands to Sensing and Diagnostic Module (SDM). SDM provides power and ground to Side Impact Sensor (SIS). When ignition is turned on and power from SDM is detected by SIS, SIS performs internal diagnostics, then sends an identification message to SDM. SDM receives identification message within 5 seconds of power being turned on and determines if message is valid. SIS continually communicates a status message to SDM. When a fault is detected, SDM resets SIS twice by removing and reapplying power to SIS. If fault is still present, SDM will set DTC.

DTC sets when SDM does not receive a valid identification message from SIS within 5 seconds of SIS being powered up or when a status message is not received or when SDM has failed twice to reset SIS. An incorrect identification message SIS which does not match identification in SDM will also set DTC.

SDM turns on AIR BAG warning light and sets DTC.

DTC will clear when condition responsible for setting DTC no longer exists and CLEAR DTC command is issued via scan tool. History DTC will clear once 255 malfunction free ignition cycles have occurred.

Condition could be caused by a short to ground or voltage or high or low resistance in circuits 2161, 2162, 2163 or 2164.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).
2. Using scan tool, request SIR DTC display. If DTC B0079, B0080, B0081 or B0082 is retrieved as a current DTC, go to step 10. If DTC B0079, B0080, B0081 or B0082 is not retrieved as a current DTC, go to next step.
3. Turn ignition off. If DTC B0077 is current, disconnect driver-side SIS connector. See «SIDE IMPACT SENSOR (SIS)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. If DTC B0078 is current, disconnect passenger-side SIS connector. If connector is damaged or corroded, go to next step. If connector is okay, go to step 5.
4. If SIS side of connector is damaged, replace SIS. Go to step 11. If harness side of connector is damaged, replace connector. See «WIRING DIAGRAMS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system). Go to step 11.
5. Disconnect SDM connector. (Scheme 67) If SDM connector or SDM terminals show signs of corrosion, poor connections or other damage, go to next step. If SDM connector and terminals are okay, go to step 7.
6. If SDM connector is damaged, replace connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 11. If SDM terminals are damaged, go to step 12. NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
7. If DTC B0077 is current, disconnect driver-side SIS connector. If DTC B0078 is current, disconnect passenger-side SIS connector. Test high-side and low-side circuits of applicable SIS for an open or high resistance. If open or high resistance is found and corrected, go to step 11. If open or high resistance is not found and corrected, go to next step.
8. Inspect applicable SIS circuits for a short between high-side and low-side circuits. If short exists, correct condition and go to step 11. If short does not exist, go to next step.
9. Turn ignition on. Check applicable SIS circuits for a short to voltage. If condition is found and corrected, go to step 11. If condition is not found and corrected, go to next step.
10. If DTC B0077, B0079 or B0080 is displayed by scan tool, replace driver-side SIS. See «SIDE IMPACT SENSOR (SIS)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step. If DTC B0078, B0081 or B0082 is displayed by scan tool, replace passenger-side SIS. Go to next step.
11. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If DTC's are retrieved, go to next step. If DTC is not retrieved, system is normal.
12. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
13. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If DTC is retrieved, go to step 3. If DTC is not retrieved, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).

Electronic Frontal Sensor (EFS) uses a unidirectional 2-wire circuit. SIS modulates current on the interface to send identification. State Of Health (SOH) and deployment commands to Sensing and Diagnostic Module (SDM). SDM serves as a power source and ground for EFS. When ignition switch is turned on and EFS detects power from SDM, EFS responds by performing internal diagnostics and sending identification to SDM. SDM considers identification message to be valid if received within 5 seconds of EFS powering up. EFS continually communicates a status message to SDM. When fault is detected, SDM will attempt to reset EFS twice by removing and applying power. If fault is still present, DTC will set.

DTC B0100 sets when SDM does not receive a valid identification message from EFS within 5 seconds of EFS being powered up, when a status message is not received or when SDM has tried twice to reset SIS. DTC B0101 sets when SDM receives a NOK message from EFS. DTC B0102 will set when SDM has received an identification message from EFS which does not match identification message stored in SDM.

SDM turns on AIR BAG warning light and sets DTC.

DTC will clear when condition responsible for setting DTC no longer exists and CLEAR DTC command is issued via scan tool. History DTC will clear once 255 malfunction free ignition cycles have occurred.

Condition could be caused by a short between circuits 1834 and 5045, by a short to ground or voltage or high or low resistance in either circuit.

Note. For circuit number and wire color identification, see WIRING DIAGRAMS .

1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check)
2. Using scan tool, request SIR DTC display. If DTC B0100, B0101 or B0102 is not current, go to next step. If DTC B0100, B0101 or B0102 is current, go to step 5.
3. Turn ignition off. If DTC B0100 is current, disconnect EFS harness connector. If connector shows signs of damage or corrosion, go to next step. If connector is okay, go to step 5.
4. If EFS side of connector is damaged, replace EFS. See «ELECTRONIC FRONTAL SENSOR (EFS)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. If harness side of connector is damaged, replace connector. Go to step 11. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 11.
5. Disconnect SDM connector. (Scheme 67) If SDM connector or terminals show signs of corrosion, poor connections or other damage, go to next step. If SDM connector and terminals are okay, go to step 7.
6. If SDM connector shows signs of damage or corrosion, replace connector. See «WIRE REPAIR»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__wire-repair). Go to step 11. If SDM terminals show signs of damage or corrosion, go to step 12. NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
7. If DTC B0100 is current, disconnect EFS connector. Inspect circuits 1834 and 5045 for an open or high resistance. If an open or high resistance is found and corrected, go to step 11. If an open or high resistance is not found, go to next step.
8. Check for a short between circuits 1834 and 5045. If a short is found and corrected, go to step 11. If a short is not found and corrected, go to next step.
9. Turn ignition on. Check for a short to voltage in circuits 1834 and 5045. If a short to voltage is found and corrected, go to step 11. If a short to voltage is not found and corrected, go to next step.
10. Turn ignition off. If DTC B0100, B0101 or B0102 is current, replace EFS. See «ELECTRONIC FRONTAL SENSOR (EFS)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
11. Reconnect all SIR components. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for SIR DTC's. If DTC's are retrieved, go to next step. If DTC is not retrieved, system is normal.
12. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
13. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If DTC B0100 is retrieved, go to step 2. If DTC is not retrieved, system is normal. Go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check).

Internal fault detection is handled inside Sensing and Diagnostic Module (SDM). No external circuits are involved.

DTC sets when an internal failure is detected by SDM.

SDM refuses all additional inputs.

DTC clears when condition responsible for malfunction no longer exists. History DTC clears when SDM ignition cycle counter reaches reset threshold without a repeat of malfunction.

DTC may be stored as history DTC without affecting operation of SDM. If DTC is retrieved only as a history DTC and not as a current DTC, DO NOT replace SDM. If DTC is retrieved as a current and as a history DTC, replace SDM.

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
2. Using scan tool, request SIR DTC's. If DTC B1000 is retrieved as a current DTC, go to next step. If DTC B1000 is retrieved as a history DTC, go to «DIAGNOSTIC AIDS»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) .
3. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
4. Using scan tool, clear SIR DTC's. Road test vehicle, then check for DTC's. If DTC B1000 is retrieved, go to step 2 . If DTC B1000 is not retrieved, system is normal.

When ignition is turned on, Sensing and Diagnostic Module (SDM) compares restraints identification stored in SDM to restraints identification stored in Dash Integration Module (DIM).

DTC sets when ignition voltage is within normal operating range and restraints identification stored in SDM does not match restraints identification stored in DIM.

SDM sets DTC, turns on AIR BAG warning light and disables deployment loops.

DTC clears when restraints identification stored in SDM matches restraints identification stored in DIM.

DTC B1001 is an indication that an incorrect SDM is installed in vehicle or that SDM or DIM were replaced without reprogramming DIM with correct information.

1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to «SIR DIAGNOSTIC SYSTEM CHECK»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system__sir-diagnostic-system-check) .
2. Using scan tool, request SIR DTC's. If DTC B1001 is current, go to next step. If DTC B1001 is not current, go to step 8 .
3. Using scan tool, verify DIM is programmed with correct Vehicle Identification Number (VIN). If VIN is correct, go to step 5 . If VIN is not correct, go to next step.
4. Using scan tool, program correct VIN into DIM. Go to next step.
5. Using scan tool, program SDM serial number into DIM, following scan tool prompts. Go to next step.
6. Using scan tool, clear SIR DTC's. Turn ignition off, then on. Check for DTC's. If DTC B1001 is current, go to next step. If DTC B1001 is not current, go to step 8 .
7. Turn ignition off. Replace SDM. See «SENSING & DIAGNOSTIC MODULE (SDM)»(/buick/lesabre/viii-2000-2005/remont/airbag/#supplemental-inflatable-restraint-system) under REMOVAL & INSTALLATION. Go to next step.
8. Reconnect all SIR components. Using scan tool, clear DTC's. Road test vehicle, then check for DTC's. If DTC B1001 is retrieved, go to step 2 . If DTC B1001 is not retrieved, system is normal.

WIRE REPAIR

SIR system requires special wiring repair procedures due to sensitive nature of circuitry. Wire Repair Kit (J-38125-A) contains special sealed splices for use in repairing SIR wiring. Splices use a heat shrink sleeve with sealing adhesive to produce a sealed splice and a cross-hatched core crimp to produce a positive contact for low energy circuits.

Repair damaged SIR wire harness connectors and terminals (except pigtails) using connector repair assembly packs and splice crimping tool provided. Terminals in SIR system are manufactured from a special metal to provide necessary contact integrity for sensitive, low-energy circuits. These terminals are only available in connector repair assembly packs, and no other terminal should be substituted.

If individual terminals on SDM harness connector are damaged, SDM harness connector must be replaced using SDM harness connector pigtail assembly or SDM harness connector replacement kit. If individual terminals on any other SIR connector are damaged, entire connector must be replaced. Use appropriate connector repair assembly pack. Replace entire SIR wire harness, if necessary to maintain SIR circuit integrity.

DO NOT make wiring, connector or terminal repairs on components with wiring pigtails. If a wiring pigtail is damaged, entire component (including pigtail) should be replaced.

Any wiring other than a pigtail can be repaired by splicing in a new section of wire of same gauge. Sealed splices and crimping tool must be used for these splices. Open wire harness by removing tape as necessary, using a sewing seam ripper. Refer to instructions in kit for wiring repair procedure.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

SIR System Wiring Diagram (Bonneville). Scheme 76

SIR System Wiring Diagram (Le Sabre). Scheme 77

See also:
• AIR BAG/SRS COMPONENT INSPECTION & REPLACEMENT TABLES
• AIR BAG SAFETY PRECAUTIONS
• DISABLING & ACTIVATING AIR BAG SYSTEM
• SYSTEM OPERATION CHECK
• DISPOSAL PROCEDURES
• ON-VEHICLE DEPLOYMENT
• OFF-VEHICLE DEPLOYMENT
• WIRING DIAGRAMS
• TORQUE SPECIFICATIONS
• SIR DIAGNOSTIC SYSTEM CHECK
• WIRE REPAIR
• POST-COLLISION INSPECTION