Reading and Clearing Diagnostic Trouble Codes

The diagnostic monitor is responsible for monitoring the air bag system components and connections. A fault code will be displayed when the ignition switch is in the RUN position and the diagnostic monitor detects a system fault. Certain faults may not be displayed until approximately 30 seconds after the ignition has been switched to the RUN position. This is the amount of time required for the diagnostic monitor to test and verify any and all system faults. The codes are produced by a series of air bag indicator flashes. The fault codes are represented by a two digit decimal number. The two digit fault code will be displayed in the following manner: Flash tens digit, one second pause, flash ones digit, three second pause, repeat cycle. For example, a fault code 32 will be displayed according to:

flash flash flash, one second pause, flash flash, three second pause,
flash flash flash, one second pause, flash flash, three second pause...

The coded fault feature is prioritized so that if two or more different faults occur at the same time, the highest priority fault indication will be shown until corrected. The fault codes and their associated priorities are listed in the Fault Code Priority Table. The codes are ranked from top to bottom with the fault at the top of the list having the highest priority and the fault at the bottom of the list having the lowest priority. This listing is for information only and should not be used for system diagnosis or troubleshooting. The following deactivation procedure and diagnostic charts should be used to safely diagnose and service the system.

NOTE: If a system fault exists and the indicator is malfunctioning, an audible tone will be heard indicating the need for service. The tone produced is a series of five sets of five beeps. The number of beeps does not indicate the fault code, it means the indicator is out and a fault is present.

Diagnostic Procedures
Rotunda Air Bag Simulator 105-00008 or equivalent is required to perform diagnosis and testing of the air bag system. The Air Bag Simulator is a 1 ohm resistor used to simulate an air bag connection to the system. It is not acceptable to jump out the air bag connection with a zero ohm jumper wire. If a zero ohm jumper wire is used to jumper out the air bag connection, a system fault will be displayed (Fault Code 34 or 35) according to the priority scheme.
Deactivation Procedure
1. Disconnect positive battery cable.
2. Wait one minute. This is the time required for backup power supply in diagnostic monitor to deplete its stored energy.
3. Remove four nut and washer assemblies retaining driver air bag module to steering wheel. Disconnect driver air bag connector. Connect Rotunda Air Bag Simulator 105-00008 or equivalent to vehicle harness at top of steering wheel.
4. Connect positive battery cable.

Reactivation Procedure
1. Disconnect positive battery cable.
2. Wait one minute for backup power supply to deplete stored energy.
3. Remove air bag simulator from vehicle harness connector at top of steering column. Reconnect driver air bag connector. Position driver air bag on steering wheel and secure with four nut and washer assemblies (10 mm). Tighten nut and washer assemblies to 2.7-3.7 N.m (24-32 lb-in).
4. Connect positive battery cable.
5. Prove-out system.

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

Air Bag System Reconnect Check List

1. Are all crash sensors connected and mounted to vehicle?
2. Is LH kick panel safing sensor connected and mounted to vehicle?
3. Is gray 3-way connector at base of steering column connected?
4. Are air bag or air bag simulator connected?
5. Is diagnostic monitor connected?
6. Is vehicle battery connected?