Pinpoint Test B: Restraint Control Module (RCM) Does Not Respond To The Diagnostic Tool

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK THE RCM C2041 FOR DAMAGE
- Key in OFF position.
- Deactivate the air bag system. Refer to AIR BAG RESTRAINT SYSTEMS .
- Disconnect: RCM C2041.
- Inspect the RCM C2041 for damage.
- Is the RCM C2041 OK?
1. Yes : GO to B2.
2. No : REPAIR the RCM C2041. CARRY OUT the data link diagnostics test.
B2 CHECK CIRCUIT 70 (LB/WH) BETWEEN THE DLC C251 AND THE RCM C2041 FOR AN OPEN
- Measure the resistance between the RCM C2041 pin 5, circuit 70 (LB/WH), harness side and the DLC C251 pin 7, circuit 70 (LB/WH), harness side.
  
  Fig 1: Checking Circuit 70 (LB/WH) Between DLC C251 And RCM C2041 For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : GO to B3.
2. No : REPAIR the circuit. CARRY OUT the data link diagnostics test.
B3 CHECK FOR CORRECT RCM OPERATION
- Disconnect all the RCM connectors.
- Check for:
  - Corrosion
  - Push-out pins
- Connect all the RCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. Yes : INSTALL a new RCM. REFER to AIR BAG RESTRAINT SYSTEMS . CARRY OUT the data link diagnostics test.
2. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self -test. CARRY OUT the data link diagnostics test.