Air Bag Restraint System Ford Crown Victoria I

IDENTIFICATION

All models are equipped with driver-side and passenger-side air bags and is identified by a letter "L" in the fourth position of the Vehicle Identification Number (VIN). The VIN is located on top of instrument panel, near lower left corner of windshield. The VIN is also stamped on Vehicle Certification (VC) label, mounted on left front door pillar.

The words Supplemental Restraint System or SRS is embossed on the steering wheel center hub and/or on the instrument panel above the glove box. A label denoting that vehicle is equipped with air bags is affixed to driver-side sun visor.

DESCRIPTION & OPERATION

The Supplemental Restraint System (SRS) is designed to provide increased accident protection for driver and passenger by deploying air bags in a front-end collision. The air bags, stored in the steering wheel module and in the instrument panel above the glove box, deploy in about 40 milliseconds after the impact sensors close. The SRS is designed to be used with the 3-point safety belts.

During a front-end collision, the front impact sensor(s) internal balls are thrown forward. The balls complete an electrical circuit and ignite the inflator to deploy air bag. At least 2 sensors, one safing impact sensor and one front impact sensor, must activate simultaneously to inflate air bag.

SRS includes following components: diagnostic monitor, driver-side air bag module, passenger-side air bag module, SRS readiness light (AIR BAG warning light), front impact and safing impact sensors, ignitor assemblies (in air bag modules), air bag sliding contact (clockspring) and associated wiring harnesses. (Scheme 1)

Scheme 1

BACK-UP POWER SUPPLY

Back-up power supply is used on all models and is located inside the diagnostic monitor. If battery or battery cables are damaged in a collision before front impact sensors close the circuit, back-up power supply will deploy air bag. Back-up power supply will hold a deployment charge for approximately one minute after positive battery cable is disconnected.

CLOCKSPRING

The steering column contains a clockspring contact assembly to transfer electrical signals from steering column wiring harness to driver-side air bag module. Clockspring is mounted to steering column between column and steering wheel.

DIAGNOSTIC MONITOR

Diagnostic monitor contains a microcomputer, which monitors electrical system components and connections. Diagnostic monitor performs a system self-check of system's internal circuits every time ignition switch is turned to RUN position. Monitor also energizes SRS readiness indicator light (AIR BAG warning light) during initial system self-check and whenever a fault is detected. The faults are translated into coded light and are displayed through AIR BAG warning light.

If a system fault exists and/or AIR BAG warning light is malfunctioning, an audible tone will sound, indicating need for service. See TONE GENERATOR. Diagnostic monitor can also disarm SRS if certain faults occur.

DRIVER-SIDE AIR BAG MODULE

Driver-side air bag module is mounted on front face of steering wheel, encased in steering wheel trim cover. When front impact sensors close, signaling an impact, the ignitor causes ignition of inflator gas generant. This ignition reaction combusts sodium azide/copper oxide gas generant in the inflator, producing nitrogen gas, which inflates air bag.

When air bag deploys, tear seams molded into steering wheel trim cover separate, allowing inflation of the air bag assembly. Driver-side air bag module is not serviceable and must be replaced as a complete assembly.

PASSENGER-SIDE AIR BAG MODULE

Passenger-side air bag module is mounted in right side of instrument panel, above glove box. When a front impact sensor and rear safing impact sensor close, signaling an impact, the air bag igniters cause ignition of inflator gas generant.

Since passenger-side air bag is larger than driver-side air bag, inflator contains more gas generant in a different configuration to produce more gas. When air bag is activated, instrument panel trim cover tears at seams and hinges aside during deployment. Passenger-side air bag module is only serviced as complete assembly.

ELECTRICAL SYSTEM

SRS is powered directly from battery and can function with ignition switch in any position, including OFF and LOCK. System can also function when driver-side and passenger-side seats are unoccupied. The 3 main functions performed by electrical subsystem are detecting an impact, switching electric power to igniters for air bags and monitoring readiness of SRS.

IMPACT SENSORS

Each impact sensor assembly electrical switch reacts to impacts according to direction and force. It discriminates between impacts that require air bag inflation and impacts that do not.

When an impact occurs requiring air bag inflation, impact sensor contacts close, completing electrical circuit necessary for system operation. (Scheme 2) At least 2 sensors, one rear safing and one front impact, must be activated simultaneously to inflate air bag.

Scheme 2

On Crown Victoria and Grand Marquis, front impact sensors are located at right and left sides of radiator support. The rear safing impact sensor is located behind driver-side lower left kick panel. (Scheme 1)

TONE GENERATOR

AIR BAG warning light is the prime means of determining SRS condition. However, a series of 5 sets of 5 audible tones, indicating system requires servicing, will sound if AIR BAG warning light is out and a fault occurs in the system. Unless serviced, SRS may not function properly in an accident.

SYSTEM OPERATION CHECK

1. When checking SRS operation, and at completion of each diagnostic test, check for faults in SRS. To check system, turn ignition switch to RUN position. If AIR BAG warning light glows 4-8 seconds and then goes out, SRS is functioning properly and no fault codes exist.
2. If a fault code is detected in SRS during initial system check, AIR BAG warning light will fail to light, stay on continuously or flash a code sequence. If AIR BAG warning light flashes, indicating a fault in system, count number of flashes after fault code has cycled twice. Number of flashes represents a code number used to diagnose SRS. See DIAGNOSIS & TESTING.
3. If a system fault code exists and AIR BAG warning light fails to light, an audible tone will be heard indicating AIR BAG warning light is out and service is required. See TONE GENERATOR under DESCRIPTION & OPERATION.

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 PASSIVE RESTRAINT SYSTEM INSPECTION article in the GENERAL INFORMATION section for post-collision inspection information.

SERVICE PRECAUTIONS

These precautions should be observed when working with SRS

1. Disable SRS before servicing any SRS or steering column components. Failure to do so may result in accidental air bag deployment and personal injury. See DISABLING & ACTIVATING AIR BAG SYSTEM.
2. Wait one minute after disabling SRS before working on vehicle. Back-up power supply holds a deployment charge for approximately one minute after positive battery cable is disconnected. Servicing SRS before one minute may cause accidental air bag deployment and possible personal injury.
3. Because of critical system operating requirements, DO NOT service impact sensors, clockspring, diagnostic monitor or air bag modules. Repairs are made by replacement only.
4. Always wear safety glasses whenever servicing an air bag equipped vehicle or handling an air bag.
5. When carrying a live air bag module, ensure air bag module and trim cover are pointed away from your body. This minimizes chance of injury in event of an accidental deployment.
6. When placing a live air bag module on a bench or other surface, always face air bag module and trim cover facing up, away from surface. This will reduce motion of module if it is accidentally deployed.
7. After deployment, air bag surface may contain deposits of sodium hydroxide, which may irritate skin. Sodium hydroxide is a product of gas generant combustion. Always wear gloves and safety glasses when handling a deployed air bag. Wash your hands using mild soap and water. Follow correct disposal procedures. See DISPOSAL PROCEDURES.
8. If scrapping a vehicle with an undeployed air bag module, air bag must be deployed. See DISPOSAL PROCEDURES.
9. If a part is replaced and new part does not correct condition, reinstall original part and perform diagnostic procedure again.
10. Never probe connectors on air bag module. Doing so may cause air bag deployment and/or personal injury.
11. Instruction to disconnect always refers to connector. DO NOT remove component from vehicle if instructed to disconnect.
12. After any servicing, ensure AIR BAG warning light does not indicate any fault codes. See SYSTEM OPERATION CHECK.
13. Replace air bag module if trim cover (deployment doors) is marred or damaged. DO NOT repaint trim cover; paint may degrade cover material. Replace air bag module as necessary. See PROCEDURE 1 under SCRAPPED VEHICLE under DISPOSAL PROCEDURES.

DISABLING & ACTIVATING AIR BAG SYSTEM

DISABLING SYSTEM

Note. Following disabling procedure should be used for component replacement purposes only. If vehicle was involved in a collision and air bag did not deploy or if SRS is not functioning properly, and if vehicle needs to be driven, complete system deactivation is required. See COMPLETE SYSTEM DEACTIVATION.

Disconnect negative and then positive battery cables. Shield both cables. SRS contains a back-up power supply built into air bag diagnostic monitor. Wait at least one minute before servicing any air bag components. System is now disabled. To activate SRS, see ACTIVATING SYSTEM.

ACTIVATING SYSTEM

Connect positive and negative battery cables. System is now activated. From outside of vehicle (driver side), turn ignition switch to RUN position. Check AIR BAG warning light for system fault codes. Perform system operation check to ensure SRS is functioning properly. See SYSTEM OPERATION CHECK.

COMPLETE SYSTEM DEACTIVATION

Note. Complete system deactivation sequence is required for following situations

1. Vehicle was involved in a collision, air bags did not deploy and vehicle needs to be driven.
2. SRS is not functioning properly and vehicle needs to be driven.
3. Diagnosis and testing purposes.

1. Disconnect negative and positive battery cables. Wait at least one minute to deplete charge in back-up power supply. Remove driver-side air bag module. See DRIVER-SIDE AIR BAG MODULE under REMOVAL & INSTALLATION.
2. Connect Air Bag Simulator (105-00010) to clockspring. (Scheme 3) Remove passenger-side air bag module. See PASSENGER-SIDE AIR BAG MODULE under REMOVAL & INSTALLATION. Connect air bag simulator to passenger-side air bag vehicle harness connector. Connect positive and negative battery cables. To reactivate SRS, see COMPLETE SYSTEM REACTIVATION.

Scheme 3

COMPLETE SYSTEM REACTIVATION

1. Disconnect negative and positive battery cables. Remove air bag simulator from clockspring connector. Remove air bag simulator from passenger-side air bag vehicle harness connector. Install driver-side and passenger-side air bag modules.
2. Position driver-side air bag module on steering wheel. Secure it using 4 nut and washer assemblies. Tighten to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. Reconnect positive and negative battery cables. System is now reactivated. Perform system operation check to ensure SRS is functioning properly. See SYSTEM OPERATION CHECK.

ADJUSTMENTS

Information is not available from manufacturer. Wiring from clockspring to air bag module must align with hole in steering wheel. If wiring is not aligned properly, wiring may accidentally be cut when steering wheel is installed and rotated.

DISPOSAL PROCEDURES

Air bag disposal may be necessary in following situations

1. Scrapping vehicle with deployed air bag.
2. Scrapping vehicle with live air bag.
3. Disposal of a live but electrically faulty air bag module.
4. Disposal of a deployed air bag module.

AIR BAG DISPOSAL PROCEDURES

DEPLOYED AIR BAG

Dispose of deployed air bag module as any other part. Air bag module components are not reusable.

UNDEPLOYED AIR BAG - FAULTY UNIT

If an undeployed air bag module is diagnosed as faulty, contact vehicle manufacturer for proper disposal instructions.

SCRAPPED VEHICLE

If vehicle is to be scrapped, undeployed air bag module must first be deployed. Use one of following procedures for deployment of air bag.

Procedure 1: Electronic Deployment With Wiring Intact

This procedure assumes air bag wiring is intact, AIR BAG warning light indicates no fault codes, system performance check is okay and vehicle battery is still in place (or one has been provided for testing). Perform this procedure outdoors and away from other personnel, as air bag makes a loud noise upon deployment.

1. Before proceeding, see SERVICE PRECAUTIONS. Check and clear front seat of all loose objects. DO NOT permit any occupants inside vehicle. While outside of vehicle, reach in driver's window and turn ignition switch to RUN position.
2. Observe AIR BAG warning light. If AIR BAG warning light displays any fault codes, go to PROCEDURE 2. If AIR BAG warning light glows 4-8 seconds and then goes out, system is intact. Go to next step.
3. Turn ignition switch to OFF position. Disconnect rear safing impact sensor connector. (Scheme 1)-6. Connect a jumper wire between wiring harness side of safing sensor connector as indicated. See SAFING SENSOR table. SAFING SENSOR Application Connect Jumper Wire Between Circuit No. (Wire Color) Crown Victoria &Grand Marquis (1) 611 (WHT/ORG) & 614 (GRY/ORG) (1) (Scheme 4)WARNING: Ensure no occupants are in vehicle and prepare for a loud noise.
4. On all other models, disconnect left front impact sensor. Connect a second jumper wire between ground and wiring harness side of left front impact sensor as indicated. See LEFT FRONT IMPACT SENSOR table. Go to next step. LEFT FRONT IMPACT SENSOR Application Connect Jumper Wire Between Circuit No. (Wire Color) Crown Victoria & Grand Marquis 621 (WHT/YEL) & Ground On all models, driver-side and passenger-side air bags should deploy. If air bags do not deploy, go to PROCEDURE 2. If air bags deploy, loud noise will sound and air bag material will be visible.
5. Allow at least 10 minutes for cooling and dissipation of air bag effluents before approaching vehicle. Air bags are now inoperative and vehicle may be scrapped in usual manner.

Scheme 4

Procedure 2: Remote Deployment Of Air Bag

This procedure is to be used when a vehicle with a live driver-side or passenger-side air bag is to be scrapped but a problem in air bag electrical system prevents deployment with air bag still installed in vehicle. This procedure can also be used if PROCEDURE 1 was unsuccessful.

1. Before proceeding, see SERVICE PRECAUTIONS. Deactivate SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM.
2. Remove air bag modules. See DRIVER-SIDE AIR BAG MODULE and PASSENGER-SIDE AIR BAG MODULE under REMOVAL & INSTALLATION. With air bag modules removed, cut air bag connector from wires at air bag module. Strip back 1" of insulation from wire ends. Obtain 2 wires at least 20 feet long. Connect one end of each 20-foot wire to one end of each air bag module wire. WARNING: When placing a live air bag on a bench or other surface, always face air bag and trim cover up, away from surface. This will reduce motion of air bag module if it is accidentally deployed.
3. Place air bag module with trim cover facing upward on a flat surface, in remote area such as parking lot or field. Remain at least 20 feet away from air bag module. Deploy air bag by touching loose ends of both wires to 12-volt battery terminals.
4. If successful, a loud noise will be heard and bag material will be visible. Allow at least 10 minutes for cooling and dissipation of air bag effluents before approaching air bag. Air bag is now inoperative. If air bag does not deploy, air bag module is faulty. Contact vehicle manufacturer for further instructions on disposal procedures.

REMOVAL & INSTALLATION

Removal

1. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM. CAUTION: When removing steering wheel, DO NOT use a knock-off type steering wheel puller, or strike steering wheel or shaft with a hammer. A sudden impact could damage bearing or collapse steering column.
2. Remove driver-side air bag module. See DRIVER-SIDE AIR BAG MODULE. Ensure vehicle front wheels are in straight-ahead position and steering column shaft alignment mark is at 12 o'clock position. Remove steering wheel. See STEERING WHEEL.
3. Remove instrument panel moldings and trim panels as necessary to access lower steering column shroud. Remove steering column lower shroud.
4. Disconnect clockspring contact assembly wiring harness. Apply 2 strips of tape across clockspring stator and rotor to prevent accidental rotation. (Scheme 5) Remove 3 clockspring retaining screws and pull clockspring off steering column shaft.

Scheme 5

Note. Service replacement clockspring will contain a Red plastic locking insert to prevent rotation. DO NOT remove insert until clockspring is securely installed on column.

Installation

1. Ensure vehicle front wheels are in straight-ahead position, and steering column shaft alignment mark is at 12 o'clock position. Align clockspring (contact assembly) to column shaft and mounting bosses. Slide clockspring onto shaft. Install 3 retaining screws and tighten to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article.
2. Remove tape strips. If new clockspring is being installed, remove Red plastic locking insert. Route clockspring wiring down column assembly and connect to column wiring harness. Install steering column lower shroud and lower instrument panel cover. Install lower right and left moldings on instrument panel.
3. Install steering wheel and driver-side air bag module. Activate SRS. Ensure system is functioning properly. See SYSTEM OPERATION CHECK.

Removal (All Others)

1. Diagnostic monitor is located behind glove box. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM.
2. Release tabs to allow glove box door to drop past its stops. If necessary, remove heater duct above glove box. Release diagnostic monitor retaining tabs. Slide monitor from bracket. Disconnect diagnostic monitor connectors, and remove monitor.

To install, reverse removal procedure. Activate SRS. Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK.

1. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM.
2. Remove nuts/bolts and washers retaining air bag module to steering wheel. (Scheme 6) Disconnect air bag module wiring connector from clockspring connector. Disconnect speed control connector, if necessary. Remove air bag module.

Connect air bag module wiring connector to clockspring connector. Position air bag module to steering wheel and secure with nut and washer assemblies. Tighten air bag module nuts/bolts to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. Activate SRS. Ensure system is functioning properly. See SYSTEM OPERATION CHECK.

Scheme 6

1. Passenger-side air bag module is located above glove box. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM. Remove instrument panel lower molding on right side.
2. On Grand Marquis, remove right side A/C register. On all models, remove right side instrument cluster finish panel retaining screws and finish panel. Open glove box. Press sides inward. Lower glove box to floor.
3. Working through glove box opening, remove air bag module front retaining bolts. (Scheme 7) Remove rear air bag module retaining screws. Disconnect air bag connector. Remove module.

To install, reverse removal procedure. Activate SRS. Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK.

Scheme 7

FRONT IMPACT SENSORS

Note. Vehicle sensor orientation is critical for proper system operation. If a vehicle equipped with SRS is involved in a crash, and fenders or grille area have been damaged, inspect sensor mounting brackets for deformation. If damaged, system should be deactivated to ensure air bag does not deploy. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Damaged sensor(s) should be replaced, whether or not air bag has been deployed. In addition, ensure body structure in area of sensor mounting is restored to its original construction.

Front impact sensors are attached to left and right sides of radiator support. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect front impact sensor connector. Remove screws and sensor.

Position sensor with arrow on sensor pointing toward front of vehicle, and secure it using screws. Tighten screws to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. Connect front impact sensor connector to wiring harness connector. Activate SRS. Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK.

REAR SAFING SENSOR

Note. Vehicle sensor orientation is critical for proper system operation. If a vehicle equipped with SRS is involved in a collision, and fenders or grille area have been damaged, inspect sensor mounting brackets for deformation. If damaged, system should be deactivated to ensure air bag does not deploy. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Damaged sensor(s) should be replaced, whether or not air bag has been deployed. In addition, ensure body structure in area of sensor mounting is restored to its original construction.

Rear safing sensor is located at left cowl pillar, behind left kick panel. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM. Remove left cowl kick panel. Disconnect sensor connector. Remove wiring locator. Remove screws and sensor.

Position sensor with arrow on sensor pointing toward front of vehicle, and secure it using screws. Reverse removal procedure to complete installation. Tighten screws to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. Activate SRS. Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK.

1. Before proceeding, see SERVICE PRECAUTIONS. Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM.
2. Center front wheels to straight-ahead position. Remove driver-side air bag module from steering wheel. See DRIVER-SIDE AIR BAG MODULE. Disconnect speed control wiring harness connector (if equipped) from steering wheel.
3. Remove steering wheel retaining bolt. Reference mark steering wheel hub to steering wheel shaft to ensure proper alignment during installation. Using Steering Wheel Puller (T67L-3600-A), remove steering wheel. Route clockspring wiring harness through steering wheel as wheel is lifted off shaft.

1. Ensure vehicle front wheels are in straight-ahead position. Route clockspring wiring harness through steering wheel opening at 3 o'clock position. Position steering wheel onto steering shaft and align reference marks.
2. Ensure air bag clockspring wire is not pinched when positioning steering wheel. Install new steering wheel retaining bolt and tighten to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. Connect speed control wiring harness connector to steering wheel and secure connector assembly into steering wheel clip.
3. Install driver-side air bag module. See DRIVER-SIDE AIR BAG MODULE. Activate SRS. Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK.

DIAGNOSIS & TESTING

SELF-DIAGNOSTICS

System readiness indicator light (AIR BAG warning light) is used in diagnosing malfunctions or faults in SRS. A fault code will be displayed when ignition switch is in RUN position and diagnostic monitor detects a system fault. Certain faults may not be displayed until about 30 seconds after ignition switch has been turned to RUN position. This is time required for diagnostic monitor to test and verify all system faults.

2-digit fault codes are produced by a series of AIR BAG warning light flashes. For example, a fault Code 32 will be displayed in following manner: flash flash, flash, one-second pause, flash flash, 3-second pause. Cycle will repeat.

Coded fault feature is prioritized so that if 2 or more different faults occur at same time, highest priority fault indication will be shown until corrected using appropriate diagnostic test procedure. Identify fault code and perform appropriate diagnostic test. See appropriate FAULT CODE IDENTIFICATION table. See DIAGNOSTIC TESTS. Once higher priority fault has been corrected, check AIR BAG warning light to see if other faults exist. See SYSTEM OPERATION CHECK.

If a system fault exists and AIR BAG warning light is malfunctioning, a series of 5 sets of 5 beeps will sound, indicating service is needed. Number of beeps does not indicate a fault code. See appropriate TEST A under DIAGNOSTIC TESTS.

FAULT CODE IDENTIFICATION

DIAGNOSTIC TESTS

Note. Following diagnostic tests and illustrations are supplied courtesy of Ford Motor Co.

TEST A - AIR BAG WARNING LIGHT DOES NOT LIGHT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

Description

AIR BAG light is designed to glow for 4-8 seconds when ignition is turned on. This initial 4-8 second illumination is normal operation. System is performing a system operation check. Diagnostic monitor requires power at terminals No. 1 and 6 to energize AIR BAG light.

Possible Causes

An inoperative AIR BAG light may be caused by a burned-out bulb, an open circuit in wiring for AIR BAG light circuit or a loss of voltage at terminals No. 1 or 6.

Scheme 8

1. Check For Battery Voltage - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect diagnostic monitor connectors. Diagnostic monitor is behind glove box. Turn ignition on. Measure voltage between terminals No. 1 (Dark Blue/Green wire) and No. 3 (Black wire) of diagnostic monitor connector. (Scheme 8) If battery voltage is present, go to step 2). If battery voltage is not present, locate and repair open circuit between fuse block and terminal No. 1 of diagnostic monitor connector. Also, check fuse No. 18 in fuse block and ensure terminal No. 3 of diagnostic monitor has good ground.
2. Check For Open Circuit - With ignition on and diagnostic monitor disconnected, check AIR BAG light. If AIR BAG light is on, replace diagnostic monitor. If AIR BAG light is off, locate and repair open in AIR BAG light circuit. Check for burned-out bulb, blown fuse, open connections and pushed-out connector pins. (Scheme 8): Diagnostic Monitor Connector Terminal ID

TEST B - AIR BAG WARNING LIGHT STAYS ON

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

AIR BAG light is designed to glow for 4-8 seconds when ignition is turned on. This initial 4-8 second illumination is normal operation. System is performing a system operation check. Diagnostic monitor detects faults located in monitored circuits of air bag system. Diagnostic monitor will command AIR BAG light to flash a series of times to indicate fault code that has been detected. If AIR BAG light comes on when ignition is turned on and stays on continuously for more than 8 seconds, a fault exists in AIR BAG light circuit.

Continuous illumination of AIR BAG light may be caused by a disconnected or poorly connected diagnostic monitor that may not be pushing shorting bar between terminals No. 4 and 5 into its fully retracted position. This shorts AIR BAG light circuit to ground and causes AIR BAG light to be on continuously. Continuous illumination can also be caused by a faulty diagnostic monitor or a shorted AIR BAG light circuit.

1. Check Diagnostic Monitor Connections - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Inspect diagnostic monitor connectors. Diagnostic monitor is located behind glove box. Ensure connectors are fully pushed together. Repair as necessary. If connectors are okay, go to step 2).
2. Check AIR BAG Light Circuitry - Remove plastic locking wedge from diagnostic monitor Gray connector. Turn ignition on. If AIR BAG light is off, go to step 3). If AIR BAG light is on, locate and repair short to ground in AIR BAG light circuit.
3. Inspect Shorting Bar - Inspect shorting bars on plastic locking wedge for proper operation. Compare with another vehicle, if necessary. If shorting bar is in good working condition, replace diagnostic monitor. If shorting bar is not in good condition, replace plastic locking wedge.

CODE 12 - LOW BATTERY VOLTAGE

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures voltage at terminal No. 13 of diagnostic monitor connector. Reading should be battery voltage. If voltage drops to less than 9 volts, Code 12 will set.

Code 12 will set if an open circuit exists between fuse block and terminal No. 13 or internal short to ground exists in safing sensor. Code 12 will also set if short to ground exists in circuit No. 611 or 612 or charging circuit problem (less than 9 volts) exists.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 12 is flashing, go to step 2). If Code 12 is not flashing, check connectors, wiring, splices, crimps and charging circuit for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Voltage Check - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect diagnostic monitor. Diagnostic monitor is located behind glove box. Turn ignition on. Measure voltage between terminals No. 13 (Red/White wire) and No. 3 (Black wire) of diagnostic monitor connector. (Scheme 8) If battery voltage is not present, go to step 3). If battery voltage is present, replace diagnostic monitor.
3. Check Fuse - Check fuse No. 5. If fuse is blown, go to step 4). If fuse is okay, locate and repair open between positive terminal of battery and terminal No. 13 of diagnostic monitor connector. Also, check in-line splice on circuit No. 937.
4. Check For Short To Ground - Replace fuse. If fuse does not blow again, go to step 5). If fuse blows again, locate and repair short to ground between fuse No. 5 and terminal No. 13 of diagnostic monitor.
5. Check For Short To Ground In Circuits No. 611 & 612 - Turn ignition off. Disconnect diagnostic monitor. Turn ignition on. Check fuse No. 5. If fuse is blown, locate and repair short to ground in circuit No. 611 (White/Orange wire) or No. 612 (Purple/Orange wire). If fuse is okay, short to ground is intermittent. Check all circuits between fuse and terminal No. 13 of diagnostic monitor. Also check circuits No. 611 and 612 for intermittent shorts. Repair as necessary.

CODE 13 - AIR BAG CIRCUIT SHORTED TO GROUND

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures voltage at terminal No. 11 of diagnostic monitor connector. Voltage at terminal No. 11 varies with charging system voltage. If diagnostic monitor measures a voltage of 2 volts or less at terminal No. 11, Code 13 will set. When Code 13 sets, diagnostic monitor blows its internal thermal fuse. This disables air bag deployment circuit. If short to ground is corrected, voltage at terminals No. 11 and 12 will return to normal and a fault Code 51 will set, indicating an open thermal fuse.

Code 13 will set if a short to ground is present in circuit No. 614, 615, 616, 617, 619 or 623. Code 13 will also set if clockspring is shorted to ground, safing sensor is shorted to ground internally or air bag is shorted to ground internally.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 13 is flashing, go to step 2). If Code 13 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Check for fault codes. If Code 13 is flashing, go to step 3). If Code 13 is not flashing, go to step 5).
3. Check Air Bags & Clockspring - Inspect clockspring wiring in steering wheel, driver-side air bag and passenger-side air bag for damaged, chafed or pinched wires. If any component wires are damaged, replace component that has damaged wires. After repair is completed, go to CODE 51. If wiring is okay, go to step 4). WARNING: For following step, use a DVOM with less than 10 milli-amp short circuit current on lowest resistance scale possible. Failure to use a DVOM of this type may cause air bag to deploy.
4. Verify Short In Air Bags - Ensure shorting bars are correctly installed in both driver-side and passenger-side air bag connectors. Measure resistance between either terminal of air bag connector and metal case of air bag module. Perform measurement on both driver-side air bag and passenger-side air bag. If resistance is infinite (open), replace clockspring. After repair is completed, go to CODE 51. If resistance is not infinite, replace air bag module. After repair is completed, go to CODE 51.
5. Install Air Bag Simulator At Base Of Steering Wheel - Remove air bag simulator from driver-side air bag connector. Disconnect clock-spring from main wiring harness at base of steering column. Connect air bag simulator to main wiring harness in place of clockspring connector. Turn ignition on. Check for fault codes. If Code 13 flashes, go to step 6). If Code 13 does not flash, replace clockspring. After repair is completed, go to CODE 51.
6. Remove Air Bag Simulator From Base Of Steering Wheel - Remove air bag simulator from main wiring harness at base of steering column. Remove air bag simulator from passenger-side air bag. Turn ignition on. Check for fault codes. If Code 13 flashes, go to step 7). If Code 13 does not flash, locate and repair short to ground in wire between circuit No. 615 (Gray/White wire) and No. 616 (Pink/Black wire). After repair is completed, go to CODE 51.
7. Check Shorted Wiring - Turn ignition off. Disconnect diagnostic monitor located behind glove box. Check for continuity between terminal No. 3 (Black wire) and terminal No. 11 (Gray/Orange wire) of diagnostic monitor connector. If continuity exists (short to ground), go to step 8). If continuity does not exist, measure resistance between terminal No. 3 and terminals No. 17 (Pink/Orange wire) and No. 19 (White/Yellow wire) of diagnostic monitor connector. If both resistance readings are 777-797 ohms, replace diagnostic monitor. If either reading is not 777-797 ohms, go to step 10).
8. Check Safing Sensor Circuit - Disconnect safing sensor. Safing sensor is located behind left kick panel. Reconnect diagnostic monitor. Check for fault codes. If Code 13 is flashing, locate and repair short to ground in circuit No. 614 (Gray/Orange wire). After repair is completed, go to CODE 51. If Code 13 is not flashing, go to step 9).
9. Verify Short To Ground In Safing Sensor - Measure resistance between ground and Gray/Orange wire of safing sensor connector. If resistance is less than 10 ohms, replace safing sensor. After repair is completed, go to CODE 51. If resistance is more than 10 ohms, locate and repair short to ground in Purple/White wire between safing sensor and diagnostic monitor. After repair is completed, go to CODE 51.
10. Check Front Impact Sensors - If terminal No. 17 was shorted to ground in step 7), disconnect right front impact sensor. If terminal No. 19 was shorted to ground in step 7), disconnect left front impact sensor. Measure resistance between sensor terminals. If resistance is less than 750 ohms, replace sensor. After repair is completed, go to CODE 51. If resistance more than 750 ohms, repair short to ground in Pink/Orange or White/Yellow wire between impact sensor and diagnostic monitor.

CODE 21 - SAFING SENSOR NOT MOUNTED TO VEHICLE PROPERLY

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

Circuit No. 613 is riveted to side of safing sensor housing. Housing is grounded to vehicle. Resistor inside of diagnostic monitor is connected to terminal No. 16 and 5-volt reference signal. If circuit No. 613 is properly grounded, voltage at terminal No. 16 will be zero volts. If voltage on circuit No. 613 is more than 0.7 volt, Code 21 will set.

Code 21 will set if there is a poor connection due to loose mounting, dirt or corrosion at safing sensor mounting surface. Code 21 will also set if there is an open or damaged wire between terminal No. 16 of diagnostic monitor connector and safing sensor or an open or loose wire inside of safing sensor.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 21 is flashing, go to step 2). If Code 21 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Check Safing Sensor Ground - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect negative battery cable. Measure resistance between terminals No. 3 (Black wire) and No. 16 (Dark Blue/White wire) of diagnostic monitor connector. (Scheme 8) If resistance is more than 2 ohms, go to step 3). If resistance is less than 2 ohms, replace diagnostic monitor.
3. Check Safing Sensor Circuit - Disconnect safing sensor. Safing sensor is located behind left kick panel. Measure resistance between Dark Blue/White wire of safing sensor connector and safing sensor housing. If resistance is more than 2 ohms, go to step 4). If resistance is less than 2 ohms, locate and repair open in circuit No. 613 (Dark Blue/White wire).
4. Check Safing Sensor - Remove safing sensor from vehicle. Clean safing sensor mounting surfaces. Install safing sensor. Check resistance between ground and circuit No. 613 (Dark Blue/White wire) of safing sensor connector. If resistance is less than 2 ohms, cleaning sensor mounting surfaces has corrected problem. Reconnect safing and diagnostic monitor connectors. If resistance is more than 2 ohms, replace safing sensor.

CODE 22 - SAFING SENSOR SHORTED

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures voltage at terminals No. 11 and 12. Voltage at these 2 terminals are controlled by 2 resistors inside of diagnostic monitor and resistors located within impact sensors. This voltage varies with charging system voltage. If voltage at both terminals exceeds 5 volts, Code 22 will be set.

Code 22 will set if there is a short in wiring harness between circuit No. 614 (Gray/Orange wire) or No. 623 (Purple/White wire) and another wire. Code 22 will also set if clockspring is shorted between circuit No. 614 and horn or cruise control wiring. Code 22 will also set if safing sensor is shorted internally or vehicle charging system voltage is too high (more than 17 volts).

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 22 is flashing, go to step 2). If Code 22 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Check For Short Circuit - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition on. Measure voltage between terminals No. 3 (Black wire) and No. 13 (Red/White wire) of diagnostic monitor connector. Note this reading as system voltage.
3. Using terminal No. 3 as ground, measure voltage between terminals No. 3 and 11 (Gray/Orange wire) of diagnostic monitor connector. Using this voltage reading and system voltage reading taken in step 2), determine if voltage at terminal No. 11 is within specification. See VOLTAGE SPECIFICATIONS (CODE 22) table. If voltage is high, go to step 4). If voltage is okay, replace diagnostic monitor. VOLTAGE SPECIFICATIONS Voltage At Terminal No. 11 System Voltage 2.2 10.5 2.3 11.0 2.4 11.5 2.5 12.0 2.6 12.5 2.7 13.0 2.8 13.5 2.9 14.0 3.0 14.5 3.1 15.0 3.2 15.5
4. Check For Shorted Wiring - Turn ignition off. Disconnect safing sensor. Safing sensor is behind left kick panel. Disconnect diagnostic monitor. Diagnostic monitor is behind glove box. Check for continuity between terminal No. 11 (Gray/Orange wire) and terminals No. 15 (White/Orange wire) and No. 23 (Purple/Orange wire) of diagnostic monitor connector. (Scheme 8) If continuity does not exist, go to step 5). If continuity exists in any circuit, locate and repair short between circuits No. 611 and 612 or 614. Repair as necessary.
5. Check For Safing Sensor Short - Check for continuity between White/Orange wire and Gray/Orange wire of safing sensor connector. If continuity exists, replace safing sensor. If continuity does not exist, locate and repair short to voltage in circuit No. 614, 615, 616 or 623.

CODE 23 - SAFING SENSOR INPUT FEED/RETURN CIRCUIT OPEN

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system checks okay, install air bag modules and reactivate air bag system.

Battery voltage is present at terminal No. 15 of diagnostic monitor at all times. Voltage at terminal No. 15 can be as high as 19 volts when ignition is on and back-up power supply in diagnostic monitor is charged-up. Circuit No. 611 (White/Orange wire) is connected to circuit No. 612 (Purple/Orange wire) inside safing sensor. Voltage at terminal No. 23 should be same as voltage at terminal No. 15 at all times. Diagnostic monitor compares voltage available at these terminals. If voltage at terminal No. 23 is low, Code 23 will set.

Code 23 will set if an open exists in circuit No. 611 or 612. Code 23 will also set if an open circuit exists in safing sensor.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 23 is flashing, go to step 2). If Code 23 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition on. Wait 30 seconds. Using terminal No. 3 (Black wire) as a ground, measure voltage between terminal No. 3 and terminals No. 15 (Purple/Orange wire) and No. 23 (White/Orange wire) of diagnostic monitor connector. If voltage is 17-19 volts at both terminals, replace diagnostic monitor. If voltage is not 17-19 volts at both terminals, go to step 3).
3. Check Circuit Continuity - Set ohmmeter to 200-ohm scale or AUTO. Disconnect safing sensor. Safing sensor is located behind left kick panel. Measure resistance between circuits No. 611 (White/Orange wire) and No. 612 (Purple/Orange wire) at safing sensor. If resistance is less than 2 ohms, locate and repair open in circuit No. 611 or 612 of wiring harness. If resistance is more than 2 ohms, replace safing sensor.

CODE 24 - SAFING SENSOR CIRCUIT OPEN OR LOW RESISTANCE IN FRONT IMPACT SENSOR

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Each front impact sensor has an internal resistor. Diagnostic monitor uses these resistors in combination with 2 resistors inside diagnostic monitor to create a tightly controlled diagnostic voltage at terminal No. 11. Voltage at terminal No. 11 varies with charging system voltage. Diagnostic monitor measures voltage at terminal No. 11 and compares it to terminal No. 13 voltage. If voltage at terminal No. 11 is low in comparison to terminal No. 13, Code 24 will set.

Code 24 will set if open circuit or high resistance exists in safing sensor or wiring harness circuits No. 614 or 623. Code will also set if short to ground exists in circuit No. 614 or 623. Intermittent battery voltage at terminal No. 13 of diagnostic monitor can cause reference voltage inside of diagnostic monitor to fluctuate and Code 24 to set in some circumstances.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 24 is flashing, go to step 2). If Code 24 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition on. Measure voltage between terminals No. 3 (Black wire) and No. 13 (Red/White wire) of diagnostic monitor connector. Note this reading as system voltage.
3. Using terminal No. 3 as ground, measure voltage between terminal No. 3 and terminals No. 11 (Gray/Orange wire) and No. 12 (Purple/White wire) of diagnostic monitor connector. Using these voltage readings and system voltage reading taken in step 2), determine if voltage at terminals No. 11 and 12 are within one volt of specification. See VOLTAGE SPECIFICATIONS (CODE 24) table. If both voltage readings are within specification, check for an intermittent open circuit between fuse block and terminal No. 13. Repair as necessary. If wiring is okay, replace diagnostic monitor. If both voltage readings are low, go to step 4). If voltage reading at terminal No. 12 is high and voltage reading at terminal No. 11 is low, go to step 5). VOLTAGE SPECIFICATIONS Voltage At Terminal No. 11 Or 12 System Voltage 2.2 10.5 2.3 11.0 2.4 11.5 2.5 12.0 2.6 12.5 2.7 13.0 2.8 13.5 2.9 14.0 3.0 14.5 3.1 15.0 3.2 15.5
4. Check Circuit Resistance - Turn ignition off. Disconnect diagnostic monitor. Diagnostic monitor is located behind glove box. Disconnect negative battery cable. Using terminal No. 3 (Black wire) as ground, measure resistance between terminal No. 3 and terminals No. 17 (Pink/Orange wire) and No. 19 (White/Yellow wire) of diagnostic monitor connector. If resistance readings are both 777-797 ohms, go to step 7). If either reading is not 777-797 ohms, go to step 6).
5. Check For Short Circuit - Turn ignition on. Disconnect safing sensor. Safing sensor is located behind left kick panel. Check for continuity between circuits No. 614 (Gray/Orange wire) and No. 623 (Purple/White wire) of safing sensor connector. If continuity does not exist, locate and repair open in Gray/Orange wire or Purple/Orange wire. If continuity exist, replace safing sensor.
6. Measure Resistance - Disconnect front impact sensor whose resistance was not 777-797 ohms in step 4). Measure resistance between impact sensor terminals. If resistance is not 777-797 ohms, replace impact sensor. If resistance is 777-797 ohms, locate and repair short in wiring harness leading to impact sensor.
7. Check For Open Circuit - Set ohmmeter to AUTO or 200-k/ohm scale. Using terminal No. 3 (Black wire) as ground, measure resistance between terminals No. 3 and 11 (Gray/Orange wire) of diagnostic monitor. If reading is infinite (open), replace diagnostic monitor. If reading is not infinite, locate and repair short to ground in circuit No. 614 (Gray/Orange wire), No. 615 (Gray/White wire), No. 616 (Pink/Black wire) or No. 623 (Purple/White wire).

CODE 32 - HIGH RESISTANCE OR OPEN IN DRIVER-SIDE AIR BAG CIRCUIT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures resistance between terminals No. 10 and 11 every time ignition is turned on. Normal resistance between these circuits is 1.5-2.0 ohms. If resistance exceeds 4.0 ohms, Code 32 will set. Connectors for clockspring and air bag have metal spring clips that act as shorting bars. Shorting bars are built into plastic hardshell connectors. Shorting bars are designed to short circuits No. 614 and 615 together when connectors are not connected. DO NOT attempt to remove air bag shorting bar to measure air bag resistance. Clockspring shorting bar may be removed to measure clockspring resistance. After testing is completed, carefully reinstall shorting bar and ensure it is installed correctly.

Code 32 will set if there is a poor connection where clockspring connects to main wiring harness (base of steering column). Code 32 will also set if there is an open circuit or high resistance in clockspring or circuit No. 614 or 615. An open circuit or high resistance in driver-side air bag will also cause Code 32 to set.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 32 is flashing, go to step 2). If Code 32 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Check Circuit Resistance - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect diagnostic monitor. Diagnostic monitor is located behind glove box. Set ohmmeter to AUTO or 200-ohm scale. Remove plastic locking wedge from diagnostic monitor Black connector. Measure resistance between terminals No. 10 (Gray/White wire) and No. 11 (Gray/Orange wire) of diagnostic monitor connector. If resistance is less than 2.5 ohms, ensure plastic locking wedge has been removed from connector. If resistance is 2.5-3.0 ohms, go to step 3). If resistance is more than 3.0 ohms, go to step 4).
3. Check Connector - Reconnect diagnostic monitor. Turn ignition on. If Code 32 is still flashing, replace diagnostic monitor. If Code 32 is not flashing, check for poor connections at terminals No. 10 and 11 of diagnostic monitor Black connector. Repair as necessary. If terminals are clean and tight, check for damaged clockspring wiring in steering wheel. If wiring is damaged, replace clockspring. If wiring is okay, reconnect driver-side air bag. Check for fault codes. If Code 32 is flashing, replace driver-side air bag.
4. Check Clockspring - Disconnect clockspring connector at base of steering column. Install 2-ohm air bag simulator on vehicle harness side of connector at base of steering column. Measure resistance between terminals No. 10 and 11 of diagnostic monitor connector. If resistance is 1.8-2.2 ohms, replace clockspring. If resistance is not 1.8-2.2 ohms, ensure resistance between air bag simulator terminals is 1.8-2.2 ohms. Replace air bag simulator as necessary and retest. If simulator is okay, locate and repair open in circuit No. 614 (Gray/Orange wire) or No. 615 (Gray/White wire).

CODE 33 - HIGH RESISTANCE OR OPEN IN PASSENGER-SIDE AIR BAG CIRCUIT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measurers resistance between terminals No. 8 and 9 every time ignition is turned on. Normal resistance between these circuits is 0.9-1.1 ohms. If resistance exceeds 4.0 ohms, Code 33 will set.

Code 33 will set if there is an open or high resistance in circuit No. 614 or 616. Code 33 will also set if there is an open or high resistance is passenger-side air bag.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 33 is flashing, go to step 2). If Code 33 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect diagnostic monitor. Diagnostic monitor is located behind glove box. Set ohmmeter to 200-k/ohm scale or AUTO. Remove plastic locking wedge from diagnostic monitor Black connector. Measure resistance between terminals No. 8 (Gray/Orange wire) and No. 9 (Pink/Black wire) of diagnostic monitor connector. (Scheme 8) If resistance is less than 2.2 ohms, go to step 3). If resistance is more than 2.2 ohms, ensure air bag simulator resistance is 1.8-2.2 ohms. Replace air bag simulator as necessary and retest. If air bag simulator is okay, locate and repair open in circuit No. 614 (Gray/Orange wire) or No. 616 (Pink/Black wire).
3. Check For Code 33 - Reconnect diagnostic monitor. Turn ignition on and wait 30 seconds. Check for fault codes. If Code 33 is flashing, replace diagnostic monitor. If Code 33 is not flashing, go to step 4).
4. Turn ignition off. Reactivate air bag system. See COMPLETE SYSTEM REACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Check for fault codes. If Code 33 is flashing, replace passenger-side air bag. If Code 33 is not flashing, fault is intermittent. Inspect circuits No. 614 and 616 for potential open circuits. Also, check connectors at diagnostic monitor and passenger-side air bag. Repair as necessary.

CODE 34 - LOW RESISTANCE OR SHORT IN DRIVER-SIDE AIR BAG CIRCUIT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures resistance between terminals No. 10 and 11 every time ignition is turned on. Normal resistance between these circuits is 1.5-2.0 ohms. If resistance between circuits is less than 0.7 ohm, Code 34 will set. Connectors for clockspring and air bag have metal spring clips that act as shorting bars. Shorting bars are built into plastic hardshell connectors. Shorting bars are designed to short circuits No. 614 and 615 together when connectors are not connected. DO NOT attempt to remove air bag shorting bar to measure air bag resistance. Clockspring shorting bar may be removed to measure clockspring resistance. After testing is completed, carefully reinstall shorting bar and ensure it is installed correctly.

Code 34 will set if there is a poor clockspring connector. Shorting bars inside connector are not being pushed back into their fully retracted positions. Code 34 will also set if there is a faulty shorting bar causing a short between circuits No. 614 and 615. A short circuit in air bag or clockspring will also cause Code 34 to set.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 34 is flashing, go to step 2). If Code 34 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. DO NOT connect Air Bag Simulator (105-00010) to clock-spring connector. Disconnect diagnostic monitor. Diagnostic monitor is behind glove box. Remove plastic locking wedge from diagnostic monitor Black connector. Check for continuity between terminals No. 10 (Gray/White wire) and No. 11 (Gray/Orange wire) of diagnostic monitor connector. If continuity does not exist, go to step 3). If continuity exists, go to step 4). NOTE: In following step, it may be helpful to inspect clockspring-to-main wiring harness connector as an example of a normal shorting bar.
3. Check For Code 34 - Connect air bag simulator to clockspring connector at steering wheel. Reconnect diagnostic monitor. Turn ignition on and wait 30 seconds. If Code 34 is flashing, ensure air bag simulator resistance is 1.8-2.2 ohms. Replace air bag simulator as necessary and retest. If air bag simulator is okay, replace diagnostic monitor. If Code 34 is not flashing, check shorting bar on driver-side air bag connector for proper operation. If shorting bar is okay, replace driver-side air bag. NOTE: In following step, it may be helpful to inspect driver-side air bag connector as an example of a normal shorting bar.
4. Check Clockspring - Disconnect clockspring connector from main wiring harness at base of steering column. Check for continuity between terminals No. 10 (Gray/White wire) and No. 11 (Gray/Orange wire) of diagnostic monitor connector. If continuity does not exist, check shorting bar on clockspring connector for proper operation. If shorting bar is okay, replace clockspring. If continuity exists, locate and repair short between circuits No. 614 (Gray/Orange wire) and No. 615 (Gray/White wire). Also, check diagnostic monitor connector and clockspring connector for shorted terminals.

CODE 35 - LOW RESISTANCE OR SHORT IN PASSENGER-SIDE AIR BAG CIRCUIT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures resistance between terminals No. 8 and 9 every time ignition is turned on. Normal resistance between these terminals is 0.9-1.1 ohms. If resistance drops to less than 0.7 ohm, Code 35 will set.

Code 35 will set if there is a poorly mated passenger-side air bag connector, damaged shorting bar or a short within passenger-side air bag module.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 35 is flashing, go to step 2). If Code 35 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Check For Short - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Leave passenger-side air bag connector empty (DO NOT install air bag simulator). Disconnect diagnostic monitor located behind glove box. Remove plastic locking wedge from diagnostic monitor Black connector. Measure resistance between terminals No. 8 (Gray/Orange wire) and No. 9 (Pink/Black wire) of diagnostic monitor Black connector. If resistance reading is infinite (open), go to step 3). If resistance reading is not infinite, locate and repair short between terminals No. 8 and 9 of wiring harness. Also, inspect diagnostic monitor connector terminals for possible short. NOTE: In following step, it may be helpful to inspect clockspring-to-main wiring harness connector as an example of a normal shorting bar.
3. Check For Code 35 - Install passenger-side air bag simulator onto passenger-side air bag connector. Reconnect diagnostic monitor. Turn ignition on and wait 30 seconds. Check for fault codes. If Code 35 is flashing, ensure air bag simulator resistance is 1.8-2.2 ohms. Replace air bag simulator as necessary and retest. If air bag simulator is okay, replace diagnostic monitor. If Code 35 is not flashing, check shorting bar on passenger-side air bag connector for proper operation. If shorting bar is okay, replace passenger-side air bag.

CODE 41 - HIGH RESISTANCE OR OPEN FRONT IMPACT SENSOR CIRCUIT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Each front impact sensor has an internal resistor. Diagnostic monitor uses these resistors in combination with 2 resistors inside diagnostic monitor to create a tightly controlled diagnostic voltage at terminal No. 11. Front impact sensor circuits are connected together inside diagnostic monitor at terminals No. 17 (circuit No. 617) and No. 19 (circuit No. 621). Resistors inside of diagnostic monitor are connected to terminals No. 11 (circuit No. 614) and No. 12 (circuit No. 623) and are equal in value. Circuits No. 614 and 623 are connected together inside of safing sensor.

Code 41 will set if there is an open circuit in one or more circuits between diagnostic monitor and front impact sensors or abnormally high resistance in at least one front impact sensor. Code 41 will also set if there is an intermittent open between positive terminal of battery and terminal No. 13 of diagnostic monitor connector. High resistance inside safing sensor will also cause Code 41 to set.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 41 is flashing, go to step 2). If Code 41 is not flashing, check connectors, wiring and crimps for intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System & Measure Voltage At Terminal No. 11 - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition on. Measure voltage between terminals No. 3 (Black wire) and No. 13 (Red/White wire) of diagnostic monitor connector. Record this voltage reading as system voltage.
3. Using terminal No. 3 as ground, measure voltage between terminals No. 3 and 11 (Gray/Orange wire) of diagnostic monitor connector. Using this voltage reading and system voltage reading taken in step 2), determine if voltage at terminal No. 11 is within one volt of specification. See VOLTAGE SPECIFICATIONS (CODE 41) table. If voltage is not within one volt of specification, go to step 4). If voltage is within one volt of specification, turn ignition off. Inspect wiring and terminals between battery and terminal No. 13 of diagnostic monitor. Repair wiring as necessary. If wiring is okay, replace diagnostic monitor. VOLTAGE SPECIFICATIONS Voltage At Terminal No. 11 System Voltage 2.1 10.0 2.2 10.5 2.3 11.0 2.4 11.5 2.5 12.0 2.6 12.5 2.7 13.0 2.8 13.5 2.9 14.0 3.0 14.5 3.1 15.0 3.2 15.5
4. Measure Front Impact Sensor Resistance - Turn ignition off. Disconnect diagnostic monitor. Using terminal No. 3 (Black wire) as ground, measure resistance between terminal No. 3 and terminals No. 17 (Pink/Orange wire) and No. 19 (White/Yellow wire) of diagnostic monitor Gray connector. (Scheme 8) If both readings are 777-797 ohms, go to step 6). If either reading is not 777-797 ohms, go to step 5).
5. Measure Resistance Of Suspect Sensor - Locate and disconnect front impact sensor whose resistance was not 777-797 ohms in step 4). Measure resistance between terminals of suspect sensor. If resistance is 777-797 ohms, locate and repair open in wiring harness to sensor. If resistance is not 777-797 ohms, replace impact sensor.
6. Check For Continuity Between Terminals No. 15 & 11 - Set ohm-meter to 200-k/ohm scale or AUTO. Check for continuity between terminals No. 15 (White/Orange wire) and No. 11 (Gray/Orange wire) of diagnostic monitor connector. If continuity exists, go to step 7). If continuity does not exist, locate and repair short to voltage in circuit No. 614 (Gray/Orange wire), No. 615 (Gray/White wire) or No. 616 (Pink/Black wire).
7. Check Safing Sensor - Disconnect safing sensor. Safing sensor is located behind left kick panel. Check for continuity between Gray/Orange wire and White/Orange wire of safing sensor connector. If continuity does not exist, locate and repair short between circuits No. 611 and 614. If continuity exists, replace safing sensor.

CODE 44 - RIGHT FRONT IMPACT SENSOR NOT MOUNTED TO VEHICLE PROPERLY

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures resistance between terminals No. 20 and 3. If resistance varies more than 2 ohms between terminals, Code 44 will set. Impact sensor is grounded to vehicle through sensor case.

Code 44 will set if there is a poor connection due to loose mounting, dirt or corrosion at right front impact sensor mounting surface. Code 44 will also set if there is an open or damaged wire between terminal No. 20 of diagnostic monitor connector and right front impact sensor. An open or loose wire inside of impact sensor will also cause Code 44 to set.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 44 is flashing, go to step 2). If Code 44 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Leave positive battery terminal disconnected. Disconnect diagnostic monitor located behind glove box. Set ohmmeter to 200-ohm scale. Measure resistance between terminals No. 20 (Purple/Light Green wire) and No. 3 (Black wire) of diagnostic monitor connector. If resistance is more than 2 ohms, go to step 3). If it is less than 2 ohms, replace diagnostic monitor.
3. Check Impact Sensor Ground - Disconnect right front impact sensor. Measure resistance between Purple/Light Green wire in sensor connector and ground. If resistance is less than 2 ohms, inspect circuit between terminal No. 20 and sensor. Also, check all terminal crimps and splices. Repair as necessary. If resistance is more than 2 ohms, remove sensor. Clean sensor mounting surfaces. Reinstall sensor. Go to step 4).
4. Measure Resistance Of Sensor Ground - Measure resistance between ground and Purple/Light Green wire of impact sensor connector. If resistance is less than 2 ohms, circuit is okay. Cleaning sensor mounting surfaces in step 3) corrected problem. If resistance is more than 2 ohms, replace right front impact sensor.

CODE 45 - TERMINAL NO. 21 NOT CONNECTED TO GROUND

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures resistance between terminal No. 21 and 3. If resistance varies more than 2 ohms between terminals, Code 45 will set. Circuit No. 618 is spliced to a wire that is attached to right front impact sensor case. Impact sensor is grounded to vehicle through sensor case. If splice is open, Code 45 will set.

Code 45 will set if there is a poor connection due to loose mounting, dirt or corrosion at right front impact sensor mounting surface. Code 45 will also set if there is an open or damaged wire at terminal No. 21 of diagnostic monitor connector.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 45 is flashing, go to step 2). If Code 45 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Leave positive battery cable disconnected. Disconnect diagnostic monitor. Diagnostic monitor is located behind glove box. Set ohmmeter to 200-ohm scale or AUTO. Measure resistance between terminals No. 21 (Purple/Light Blue wire) and No. 3 (Black wire) of diagnostic monitor connector. If resistance is more than 2 ohms, inspect Purple/Light Green wire between terminal No. 21 and sensor. Also, check all terminal crimps and splices.

CODE 46 - LEFT FRONT IMPACT SENSOR NOT MOUNTED TO VEHICLE PROPERLY

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor measures resistance between terminals No. 22 and 3. If resistance varies more than 2 ohms between terminals, Code 45 will set. Impact sensor is grounded to vehicle through sensor case.

Code 46 will set if there is a poor connection due to loose mounting, dirt or corrosion at left front impact sensor mounting surface. Code 46 will also set if there is an open or damaged wire between terminal No. 22 of diagnostic monitor connector and left front impact sensor. An open or loose wire inside of left front impact sensor will also cause Code 45 to set.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 45 is flashing, go to step 2). If Code 45 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Leave positive battery cable disconnected. Disconnect diagnostic monitor. Diagnostic monitor is located behind glove box. Set ohmmeter to AUTO or 200-ohm scale. Measure resistance between terminals No. 22 (Tan/Black wire) and No. 3 (Black wire) of diagnostic monitor connector. If resistance is more than 2 ohms, go to step 3). If resistance is less than 2 ohms, replace diagnostic monitor.
3. Check Front Impact Sensor Ground - Disconnect left front impact sensor. Measure resistance between ground and Purple/Light Green wire in sensor connector. If resistance is less than 2 ohms, inspect circuit between terminal No. 22 and sensor. Also, check all terminal crimps and splices. Repair as necessary. If resistance is more than 2 ohms, remove sensor. Clean sensor mounting surfaces. Reinstall sensor. Go to step 4).
4. Measure Resistance Of Sensor Ground - Measure resistance between Purple/Light Green wire in impact sensor connector and ground. If resistance is less than 2 ohms, circuit is okay. Cleaning sensor mounting surfaces in step 3) corrected problem. If resistance is more than 2 ohms, replace left front impact sensor.

CODE 51 - DIAGNOSTIC MONITOR INTERNAL THERMAL FUSE OPEN

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Note. A thermal fuse is built into diagnostic monitor. If a short to ground should occur in air bag deployment circuit, microcomputer in diagnostic monitor will send a signal to fuse, causing it to open. Open fuse removes all firing power (battery/back-up power) from deployment circuits. This prevents unwanted air bag deployments due to damaged vehicle wiring.

Note. Code 51 is displayed whenever diagnostic monitor thermal fuse is open and no higher priority faults exist. Code 51 is normally seen after service of a Code 13. If a Code 51 exists and a Code 13 has not been serviced, an intermittent short to ground exists in air bag deployment wiring. Intermittent short to ground must be located and serviced before servicing a Code 51.

Diagnostic monitor measures voltages at diagnostic monitor terminals. When certain air bag deployment wires are shorted to ground, system may become susceptible to unwanted deployment of air bag. Diagnostic monitor senses short to ground and helps prevent unwanted air bag deployment by blowing diagnostic monitor thermal fuse. Blowing fuse removes all power (battery and back-up power) from air bag deployment circuits. If short to ground exists, diagnostic monitor will flash Code 13. If short to ground is intermittent and temporarily corrects itself, Code 51 will flash. If short to ground returns, Code 13 will flash instead of Code 51. If Code 51 is flashing and short to ground has not been repaired, intermittent short to ground exists in air bag circuit. DO NOT replace diagnostic monitor until short to ground has been located and repaired.

Code 51 will set if there is a short to ground in circuit No. 614, 615, 616, 617, 621 or 623. A deployed air bag may also cause a Code 51 to set. When air bag deploys, internal wiring of air bag may become shorted to metal housing inside of air bag.

Check For Short To Ground

Inspect circuits No. 614, 615, 616, 617, 621 or 623 for short to ground. Inspect wiring harness areas where wires pass through or are located next to metal components. Repair as necessary. After repair is completed, check AIR BAG warning light for codes. If Code 51 exists, deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Replace diagnostic monitor.

CODE 52 - BACK-UP POWER SUPPLY FAULT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Back-up power supply is contained within diagnostic monitor. Power supply consists of 4 capacitors and a voltage boost circuit. Voltage boost circuit charges capacitors 16-19 volts when ignition is on. Back-up power supply is connected through a diode to diagnostic monitor terminal No. 15 (circuit No. 611). Resistance of circuit No. 611 should be infinite (open) resistance to ground. This open circuit allows capacitor to maintain its higher voltage because there is no discharge path for capacitor. If voltage on capacitors does not reach and maintain at least 16 volts after about 45 seconds, Code 52 will set.

Code 52 will set if there is high resistance to ground on circuits No. 611 or 612. Code 52 will also set if voltage boost circuit located within diagnostic monitor is faulty.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 52 is flashing, go to step 2). If Code 52 is not flashing, check connectors, wiring and crimps for intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition on. Wait 30 seconds. Measure voltage between terminals No. 3 (Black wire) and No. 15 (White/Orange wire) at diagnostic monitor Gray connector. If voltage is 16-19 volts, replace diagnostic monitor. If voltage is not 16-19 volts, go to step 3).
3. Check For Open Circuit - Turn ignition off. Disconnect negative battery cable. Disconnect diagnostic monitor located behind glove box. Check for continuity between diagnostic monitor Gray connector terminals No. 3 (Black wire) and No. 15 (White/Orange wire). If continuity exists, go to step 4). Replace diagnostic monitor if continuity does not exist.
4. Check Circuit No. 611 - Disconnect safing sensor. Safing sensor is located behind left kick panel. Check for continuity between terminals No. 3 (Black wire) and No. 15 (White/Orange wire) of diagnostic monitor Gray connector. If continuity does not exist, go to step 5). If continuity exists, locate and repair short to ground in circuit No. 611 (White/Orange wire).
5. Check For Short In Sensor - Check for continuity between ground and White/Orange wire in safing sensor connector. If continuity does not exist, locate and repair short to ground in circuit No. 612 (Purple/Orange wire). If continuity exists, replace safing sensor.

CODE 53 - DIAGNOSTIC MONITOR INTERNAL FAULT

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Diagnostic monitor performs several self-tests every time ignition is turned on. If any of these tests fail, Code 53 will set.

Internal diagnostic monitor self-test failure.

1. Verify Condition - Turn ignition on. Check for fault codes. If Code 53 is flashing, go to step 2). If Code 53 is not flashing, check connectors, wiring and crimps for intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Replace diagnostic monitor.

RAPID FLASHING OF AIR BAG LIGHT, ALL IMPACT SENORS DISCONNECTED

Note. Before proceeding, see SERVICE PRECAUTIONS. After servicing has been performed, recheck AIR BAG warning light for codes with Air Bag Simulators (105-00010) still in place of air bag modules. If system is okay, install air bag modules and reactivate air bag system.

Each impact sensor has 2 wires. One wire is used for air bag deployment and monitoring sensor's connection to diagnostic monitor. Other wire is used for monitoring mounting (ground) of sensor to vehicle. If both front impact sensors are not connected and if both sensors are not properly grounded, diagnostic monitor will flash AIR BAG light continuously at a fast rate.

Rapid flashing of AIR BAG light may be caused by both front impact sensors disconnected from wiring harness or main wiring harness not connected to engine compartment wiring harness.

Test Procedure

Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. If wiring harness and all impact sensors are connected, replace diagnostic monitor. If any impact sensors are disconnected, connect sensors as necessary.

WIRE REPAIR

To repair damage to sensor wiring and wiring harnesses, note following conditions and proceed to REPAIR PROCEDURE.

1. All wire splice connections must be staggered at least 2" (50 mm) apart.
2. Use proper size butt connectors and shrink tubing for size of wire being spliced.
3. All repaired connections must be waterproofed using heat shrink tubing.
4. Use of transparent butt connectors allows inspection of finished crimped connector to ensure proper connection.

REPAIR PROCEDURE

Cut shrink tubing 1" longer than butt connector. Slide shrink tubing onto one wire end first. Insert pre-stripped wire ends into proper size butt connector, and crimp connector using appropriate crimping pliers. (Scheme 9) Slide shrink tubing over butt connector, leaving 1/2" of tubing on each side of connector. Using heat gun, hair dryer or match, heat tubing until it shrinks and adhesive flows from each end of tubing. Connection is now waterproofed.

Scheme 9

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

Scheme 10

See also:
• PASSIVE RESTRAINT SYSTEM INSPECTION
• COMPUTER RELEARN PROCEDURES