Section 01-20B: Restraints, Passive, Supplemental Air Bag System | 1996 F-150, F-250, Bronco Workshop Manual |
CAUTION: When servicing the air bag diagnostic monitor (14B056) with a blown internal fuse (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:
Verify the system using the old air bag diagnostic monitor and verify the wiring repairs success before proceeding. Repeat as many times as required.
Replace the air bag diagnostic monitor when all wire repairs are complete.
If the diagnostic trouble 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 FOR ONE MINUTE PRIOR TO SERVICING OR REPLACING ANY SYSTEM COMPONENTS.
NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) (12A650) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
Disconnect battery positive cable and wait one minute for backup power supply energy to be depleted.
Locate air bag diagnostic monitor beneath and to the left of the steering column and disconnect the two connectors.
Depress tabs retaining air bag diagnostic monitor to air bag monitor bracket (14B058). Slide air bag diagnostic monitor off air bag monitor bracket.
Disconnect electrical wiring connectors to air bag diagnostic monitor. Remove air bag diagnostic monitor.
Installation
Follow removal procedures in reverse order.
Run system prove-out check.
Air Bag Diagnostic Monitor Location
| Item | Part Number | Description |
|---|---|---|
| 1 | — | Remote Keyless Entry Programming Connector (Part of 14401) |
| 2 | 14401 | Main Wiring |
| 3 | 04320 | Instrument Panel |
| 4 | 15K602 | Remote Keyless Entry Module |
| 5 | 10D876 | Safety Belt Warning Chime Bracket |
| 6 | 14B056 | Air Bag Diagnostic Monitor |
| 7 | 14B058 | Air Bag Monitor Bracket |