Diagnosis and Testing

Most air bag system diagnostic procedures will require the use of the System Deactivation and System Reactivation Procedures outlined in this Section. These procedures allow the removal of the driver side air bag module (043B13) and passenger side air bag module (044A74) from the vehicle thereby removing the risk of air bag deployment while diagnostics are performed.

Rotunda Air Bag Simulator 105-00010 or equivalent is required to perform diagnosis and testing of the air bag system. The air bag simulator is a 2 ohm resistor used to simulate an air bag connection to the system. It is not acceptable to short circuit the air bag connection with a zero ohm jumper wire. If a zero ohm jumper wire is used to short circuit the air bag connection, an appropriate diagnostic trouble code will be displayed according to the priority scheme.

NOTE: The air bag simulators 105-00010 for 1994 vehicles have a different connector than previous simulators. The new simulator will only mate with 1993 vehicles and beyond. Likewise, the old simulator 105-00008 will only mate with 1992 and previous model year vehicles.

Deactivation Procedure

1. Disconnect battery ground cable (14301).

2. Disconnect positive battery cable.

3. Wait one minute. This is the time required for backup power supply in air bag diagnostic monitor to deplete its stored energy.

4. Remove two back cover plugs and remove screw and washer assemblies retaining driver side air bag module to steering wheel (3600) . Disconnect driver air bag connector. Remove driver side air bag module from vehicle.

    WARNING: PLACE AIR BAG MODULE ON BENCH WITH TRIM COVER FACING UP.

   Connect Rotunda Air Bag Simulator 105-00010 or equivalent to vehicle harness at top of steering column.
   
   
   
   

5. Remove passenger side air bag module as outlined. Install Rotunda Air Bag Simulator 105-00010 or equivalent on vehicle harness connector in place of passenger side air bag module .

6. Reconnect positive battery cable.

7. Reconnect battery ground cable.

   Reactivation Procedure

    WARNING: THE AIR BAG SIMULATOR MUST BE REMOVED AND THE AIR BAG RECONNECTED WHEN THE SYSTEM IS REACTIVATED.

8. Disconnect battery ground cable.

9. Disconnect positive battery cable.

10. Wait one minute for backup power supply in air bag diagnostic monitor to deplete stored energy.

11. Remove Rotunda Air Bag Simulator 105-00010 or equivalent from vehicle harness connector at top of steering column.

12. Reconnect driver side air bag module .

13. Position driver side air bag module on steering wheel and secure with two screw and washer assemblies (8 mm). Tighten screw and washer assemblies to 10.2-13.8 Nm (8-10 lb-ft). Install two back cover plugs.

14. Remove air bag simulator from vehicle harness connector on passenger side. Reconnect and install passenger side air bag module as outlined.

15. Reconnect positive battery cable.

16. Reconnect battery ground cable.

17. Prove out system.