Air Bag Control Module: Service and Repair

Air Bag Diagnostic Monitor

CAUTION: When servicing the air bag diagnostic monitor with a blown Internal fuse (diagnostic trouble code 51), find and repair all wire damage or shorts. A blown air bag diagnostic monitor can be used to find electrical faults without replacing components unnecessarily. The Diagnosis and Testing portion of this section is written to give safety first priority.

The following steps may be taken to find the cause that initiated a blown fuse:
1. Verify the system using the old air bag diagnostic monitor and verify the wiring repairs success before proceeding. Repeat as many times as required.
2. Replace the air bag diagnostic monitor when all wire repairs are complete.
3. If the diagnostic trouble code returns after making all wiring repairs, then replace the indicated component.

Removal and Installation

WARNING: THE ELECTRICAL CIRCUIT NECESSARY FOR SYSTEM DEPLOYMENT IS POWERED DIRECTLY FROM THE BATTERY AND BACKUP POWER SUPPLY. TO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE POSITIVE BATTERY CABLE MUST BE DISCONNECTED FOR ONE MINUTE PRIOR TO SERVICING OR REPLACING ANY SYSTEM COMPONENTS.

1. Disconnect positive battery cable and wait one minute for backup power supply energy to be depleted.
2. Locate air bag diagnostic monitor beneath and to the left of the steering column and disconnect the two connectors.
3. Depress tabs retaining air bag diagnostic monitor to air bag monitor bracket. Slide air bag diagnostic monitor off air bag monitor bracket.
4. Disconnect wiring connectors on air bag diagnostic monitor. Remove air bag diagnostic monitor.

For installation, follow removal procedures in reverse order.
- Run system prove-out check.