Air Bag Control Module: Service and Repair

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

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

Removal

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 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 diagnostic monitor beneath and to the left of the steering column and disconnect the two connectors.
3. Depress tabs on diagnostic monitor retaining monitor to mounting bracket and slide monitor off bracket.





4. Disconnect diagnostic monitor electrical wiring connectors and remove monitor.


Installation
1. Connect electrical wiring connectors to the diagnostic monitor.
2. Position diagnostic monitor to mounting bracket and slide monitor into place. Make sure that tabs are locked in place.
3. Connect positive battery cable.

NOTE: On vehicles equipped with EEC, when the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Powertrain Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.

4. Verify air bag system readiness.