Test Y: No Communication With RCM
WARNING: This page is about a different car, the 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, 2002 Ford Excursion, and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Check RCM connector & pin No. 5 for damage
Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Access RCM and disconnect harness connector. See RESTRAINTS CONTROL MODULE (RCM) under REMOVAL & INSTALLATION. Inspect component side and harness side of RCM connector, terminal No. 5 for damage. See Figure & Figure . If module pin and module harness connector terminal No. 5 are okay, go to next step. If module pin and module harness connector terminal No. 5 are damaged, repair or replace as necessary. Reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. - Check DLC for damage
Inspect Data Link Connector (DLC) and DLC connector terminal No. 7 for damage. See Fig 1. DLC is located under steering column. If DLC connector and DLC connector terminal No. 7 is okay, go to next step. If DLC connector and DLC connector terminal No. 7 is damaged, repair or replace as necessary. Reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. - Check circuit for open
Measure resistance between harness side of RCM connector terminal No. 5 and DLC connector terminal No. 7 (Light Blue/White wire, circuit No. 70). See Figure & Fig 1 . If resistance is less than 5 ohms, replace RCM. Reconnect air bag system. Activate air bag system. Clear all DTCs. See CLEARING FAULT CODES under DIAGNOSTICS. If resistance is more than 5 ohms, repair open in Light Blue/White wire. See WIRING DIAGRAMS . Reconnect air bag system. Activate air bag system. Clear all DTCs.