Air Bag System - Diagnostics: Overview
Group: ELECTRICALNumber: 00-90-008
Date: DECEMBER, 2000
Model: ALL
Subject:
AIR BAG SYSTEM DIAGNOSTICS
DESCRIPTION:
This TSB provides general instructions for diagnosing the Supplemental Restraint System (SRS), also known as the Air Bag System.
GENERAL INFORMATION
The following acronyms and terms are commonly used for the air bag system:
^ DAB Driver Air Bag (in the steering wheel)
^ PAB Passenger Air Bag (in the dash in front of the passenger seat)
^ DSAB Driver Side Air Bag (in the left front seat)
^ PSAB Passenger Side Air Bag (in the right front seat)
^ SAB Side Air Bag
^ SBP Driver Seat Belt Pretensioner
^ PSBPT Passenger Seat Belt Pretensioner
^ PPD Passenger Presence Detector
^ Squib The firing circuit in the airbag/pretensioner.
^ SRSCM Supplemental Restraint System Control Module
^ Shorting Bar "Shorting Bars" are spring-loaded contacts which purposely short the air
bag or pretensioner contacts together when the SRSCM connector is
removed to prevent inadvertent deployment.
GENERAL SAFETY PRECAUTIONS WHEN SERVICING A VEHICLE EQUIPPED WITH AIR BAGS:
The following are general safety rules for working on a vehicle equipped with an Air Bag System. Be sure to review the specific safety instructions in the correct shop manual for the vehicle being serviced.
1. Before performing service on any component in the Air Bag System, turn the ignition key off and disconnect the negative battery terminal. Wait at least 30 seconds for the back-up power in the SRSCM to dissipate before resuming work.
2. Always install new parts when making replacements. (Never install air bag parts from another vehicle.)
3. Never attempt to disassemble the parts from an air bag system.
4. If any air bag system component has been dropped, or if there are any cracks, dents, or other visible defects, replace that component with a new one.
5. Disconnect the negative battery terminal before performing any welding on the vehicle.
6. Do not make any sharp blows or impacts on the vehicle, especially near the SRSCM or the satellite sensors, until after the battery negative terminal has been disconnected for at least 30 seconds.
7. After completing the diagnosis and repair, always check for SRS codes generated during the repair of the system. Verify there are no new codes indicating items requiring service. Clear all codes after repairs have been completed.