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SYSTEM OPERATION CHECK An air bag light is located on left side of instrument cluster. Air bag light is used to indicate readiness of system. Light glows when ignition switch is on or engine is started. Light should stay on about 3 seconds while air bag control unit performs an electronic test of system. If air bag light does not glow when ignition is on or does not go out after 3 seconds, a fault probably exists in system. If a fault occurs while ignition is on, it is stored in fault memory. Warning light will then glow and air bag system will be switched off. If warning light glows or flickers while driving, air bag system should be tested. See DIAGNOSIS & TESTING in appropriate AIR BAG RESTRAINT SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT section. * * ADJUSTMENTS AIR BAG SPIRAL SPRING To center spiral spring assembly, turn spring assembly 3 turns from stop in either direction. REMOVAL & INSTALLATION WARNING: Failure to follow air bag service precautions may result in air bag deployment and personal injury. See SERVICE PRECAUTIONS. After component replacement, perform a system operational check to ensure proper system operation. See SYSTEM OPERATION CHECK. AIR BAG MODULE Removal 1) Before proceeding, follow air bag service precautions. See SERVICE PRECAUTIONS. Disable air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM. 2) Air bag module is located in steering wheel. See Fig. 1. Remove air bag module Torx head screws from rear of steering wheel. Lift off air bag module from steering wheel, and tilt air bag module downward. Disconnect air bag module connector. AIR BAG RESTRAINT SYSTEM – 1995 AIR BAG RESTRAINT SYSTEM – 1996

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WARNING: Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment. WARNING: Carry a live air bag module with the air bag and trim cover pointed away from your body. This will reduce the risk of injury in the event of an accidental deployment. WARNING: Do not set a live air bag module down with the trim cover face down. This will reduce the risk of injury in the event of an accidental deployment. WARNING: After deployment, the air bag surface can contain deposits of sodium hydroxide, a product of the gas generant combustion that is irritating to the skin. Wash your hands with soap and water afterwards. WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury. WARNING: Air bag modules with discolored or damaged trim covers must be installed new, not repainted. WARNING: Vehicle sensor orientation is critical for correct system operation. If a vehicle equipped with an air bag supplemental restraint system (SRS) is involved in a collision, inspect the sensor mounting bracket and wiring pigtail for deformation. Replace and properly position the sensor or any other damaged supplemental restraint system (SRS) components whether or not the air bag is deployed. WARNING: To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or striking components near the front or side air bag sensors, such as doors, instrument panel, console, door latches, strikers, seats and hood latches. Please refer to the appropriate vehicle shop manual to determine location of the front air bag sensors. The side air bag sensors are located at or near the base of the B-pillar. To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if equipped). NOTE: Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and perform the diagnostic procedure again. 1. Disconnect the battery ground cable (14301) and wait at least one minute. For additional information, refer to Section 414-01. 2. Remove the driver air bag module. For additional information, refer to Module — Driver Air Bag in this section. 3. NOTE: Make sure the wheels (1007) are in the straight-ahead position. Remove the steering wheel (3600). For additional information, refer to Section 211-04. 4. Apply two strips of masking tape across the air bag sliding contact (14A664) to prevent accidental rotation when the air bag sliding contact is removed. 5. Place the steering column in the full down tilt position, then remove the tilt wheel handle and shank (3F609). 6. Remove the lower steering column cover. 1. Remove the two bolts. 2. Position the parking brake release aside. 3. Remove the lower steering column cover.

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Depowering Procedure WARNING: Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment. WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury. WARNING: To reduce the risk of personal injury, do not use any memory saver devices. NOTE: If a seat equipped with a seat mounted side air bag and/or a safety belt pretensioner (if equipped) system is being serviced, the supplemental restraint system (SRS) must be depowered. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. 1. Turn all vehicle accessories OFF. 2. Turn the ignition switch to OFF. 3. Remove the RH kick panel cover and remove the restraints control module fuse F2.14 (10A) from the central junction box (CJB). For additional information, refer to the Wiring Diagram Manual. 4. Turn the ignition ON and visually monitor the air bag indicator for at least 30 seconds. The air bag indicator will remain lit continuously (no flashing) if the correct RCM fuse has been removed. If the air bag indicator does not remain lit continuously, remove the correct RCM fuse before proceeding. 5. Turn the ignition OFF. 6. WARNING: To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or striking components near the front or side air bag sensors, such as doors, instrument panel, console, door latches, strikers, seats and hood latches. The first row side impact sensors are located at or near the base of the B-pillars. To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if equipped). Disconnect the battery ground cable (14301) and wait at least one minute. For additional information, refer to Section 414-01. Repowering Procedure 1. WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. Make sure all restraint system diagnostic tool(s) installed during the repair have been removed from the vehicle and all SRS components are connected. 2. Turn the ignition switch from OFF to ON. 3. Install the restraints control module fuse F2.14 (10A) to the CJB and install the RH kick panel cover. 4. WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. 5. Prove out the supplemental restraint system (SRS) as follows: Turn the ignition key from ON to OFF. Wait 10 seconds, then turn the key back to ON and visually monitor the air bag indicator with the air bag modules installed. The air bag indicator will light continuously for approximately six seconds and then turn off. If an air bag supplemental restraint system (SRS) fault is present, the air bag indicator will either: — fail to light. — remain lit continuously. — flash. The flashing might not occur until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required for the restraints control module (RCM) to complete the testing of the SRS. If the air bag indicator is inoperative and a SRS fault exists, a chime will sound in a pattern of five sets of five beeps. If this occurs, the air bag indicator and any SRS fault discovered must be diagnosed and repaired. Clear all continuous DTCs from the restraints control module using a scan tool.

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CAUTION When performing service around Supplemental Inflatable Restraint (SIR) system components or wiring, the SIR system must be disabled. Failure to do so could result in possible air bag deployment, personal injury, or unneeded SIR system repairs. Catera 1. Disconnect the negative battery cable. 2. Remove the steering wheel. 3. Remove the inflatable restraint steering wheel module coil. 4. Insert a small pointed awl or wire into the ignition lock cylinder release pinhole. 5. Pull out the ignition lock cylinder. Fig. Insert a pointed tool into the release pin hole To install: 6. Install the lock cylinder. 1. Look into the hole that receives the lock cylinder on the lower RH side in order to locate the locking lever. 2. Carefully push down on the locking lever using a small flat-bladed tool until an audible click is heard. 3. Place the lock cylinder into the empty hole. 7. Install the inflatable restraint steering wheel module coil. Install the steering wheel. Deville, Fleetwood, Eldorado and Seville 1. Disable the SIR system as follows: 1. Disconnect the negative battery cable. 2. Turn the ignition switch OFF . 3. Remove the SIR fuse. On 1990 Deville and Fleetwood, remove SIR fuse No. 3 from the fuse panel. On 1991-93 Deville and Fleetwood, remove SIR fuse No. 18 from the fuse panel. On 1990-91 Eldorado and Seville, remove SIR fuse No. 19 from the fuse panel. On 1992-93 Eldorado and Seville, remove SIR fuse No. All from the engine compartment fuse panel. 4. On Deville and Fleetwood, remove the left lower sound insulator. On Eldorado and Seville, remove the left side sound insulator. 5. Remove the Connector Position Assurance (CPA) and detach the yellow 2-way connector at the base of the steering column.

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1988-94 Models See Figures 1 and 2 1. Remove the steering wheel. Fig. Fig. 1: Installing the lock cylinder Fig. Fig. 2: Ignition switch 2. Remove the turn signal switch. It is not necessary to completely remove the switch from the column. Pull the switch rearward far enough to slip it over the end of the shaft, but do not pull the harness out of the column. 3. Turn the lock to Run. 4. If necessary, remove the ignition key. 5. If equipped, remove the buzzer switch assembly. 6. Remove the lock retaining screw and remove the lock cylinder. WARNING If the retaining screw is dropped on removal, it may fall into the column, requiring complete disassembly of the column to retrieve the screw. To install: 7. Rotate the key to the stop while holding onto the cylinder. 8. Push the lock all the way in. 9. Install the screw. Tighten the screw to 40 inch lbs. (5 Nm) for regular columns, 22 inch lbs. (2.5 Nm) for tilt columns. 10. Install the turn signal switch and the steering wheel. 1995-98 Models See Figures 3, 4 and 5 CAUTION When performing service around the SIR system components or wiring, the SIR system MUST be disabled. Failure to do so could result in possible air bag deployment, personal injury or unneeded SIR system repairs. When carrying a live inflator module, make sure that the bag and trim cover are pointed away from you. Never carry the inflator module by the wires or connector on the underside of the module. In case of accidental deployment, the bag will then deploy with minimal chance of injury. When placing a live inflator module on a bench or other surface, always face the bag and trim cover up, away from the surface. 1. Disconnect the negative battery cable and disable the SIR system. 2. Remove the upper and lower shroud, air bag module and the steering column.