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

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

E1 CHECK THE RCM C2041 FOR DAMAGE
- Key in OFF position.
- Depower the supplemental restraint system (SRS). Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
- Disconnect: RCM C2041.
- Inspect the RCM C2041 for damage.
- Is the RCM C2041 OK?
- Yes : GO to E2.
- No : REPAIR the RCM C2041 as necessary. CONNECT the RCM C2041. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the data link diagnostics test.
E2 CHECK CIRCUIT 70 (LB/WH) FOR AN OPEN BETWEEN THE DATA LINK CONNECTOR (DLC) C251 AND THE RCM C2041
- 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: Measuring Resistance Between RCM C2041 Pin 5 Circuit 70 (LB/WH) & DLC C251 Pin 7, Circuit 70 (LB/WH)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to E3.
- No : REPAIR the circuit. CONNECT the RCM C2041. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the data link diagnostics test.
E3 CHECK FOR CORRECT RCM OPERATION
- Disconnect all the RCM connectors.
- Check for:
  - corrosion
  - pushed-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?
- Yes ; INSTALL a new RCM. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the data link diagnostics test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test.