Test Y: No Communication With RCM
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. 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.