Pinpoint Test A: The Air Bag Warning Indicator Is Illuminated Continuously - RCM Disconnected, Inoperative Or Lost/Low Ignition Feed

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.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.

A1 CHECK FOR ON-DEMAND AND CONTINUOUS DTCs
WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.

WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.

NOTE: After diagnosing or repairing a supplemental restraint system SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve/Record On-Demand DTCs.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve/Record Continuous DTCs.
- Were any on-demand or continuous DTCs retrieved?
- Yes : If continuous DTCs were retrieved, GO to A2. If on-demand DTCs were retrieved, GO to the RESTRAINTS CONTROL MODULE (RCM) DIAGNOSTIC TROUBLE CODE (DTC) TABLE in this article for pinpoint test direction.
- No : GO to A2.
A2 CHECK THE RCM CONNECTION
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING in this article.
- Make sure RCM C2041 is fully connected and the locking tab is engaged.
- Is RCM C2041 fully connected and the connector locking tab engaged?
- Yes : GO to A3.
- No : CONNECT C2041 and ENGAGE the locking tab. GO to A6.
A3 CHECK THE RCM
- Disconnect: RCM C2041.
- Inspect RCM C2041 component side for damaged camming beams.
  
  Fig 1: Inspecting RCM C2041
  Courtesy of FORD MOTOR CO.
- Inspect RCM C2041 harness side for worn, damaged or dislodged shorting bars. Inspect for foreign material. Inspect for pushed out connector terminals.
- Were any RCM connector concerns found?
- Yes : CORRECT the connector concerns. GO to A6.
- No : GO to A4.
A4 CHECK CIRCUIT 608 (BK/YE) FOR A SHORT TO GROUND
- Connect: RCM C2041.
- Disconnect: Instrument Cluster Module C220a.
- Measure the resistance between instrument cluster module C220a pin 14, circuit 608 (BK/YE), harness side and ground.
  
  Fig 3: Measuring Resistance Between Instrument Cluster Module C220A Pin 14 Circuit 608 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : REPAIR or INSTALL a new instrument cluster module. REFER to INSTRUMENT CLUSTER . GO to A6.
- No : GO to A5.
A5 CHECK THE RCM
- Disconnect: RCM C2041.
- Measure the resistance between the RCM C2041 pin 20, component side and ground.
  
  Fig 4: Measuring Resistance Between RCM C2041 Pin 20 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : REPAIR circuit 608 (BK/YE). GO to A6.
- No : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) in this article. GO to A6.
A6 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous DTCs recorded during Step A1.
- Were any continuous DTCs retrieved during Step A1 ?
- Yes : Do not clear any DTCs until all DTCs have been resolved. GO to the RESTRAINTS CONTROL MODULE (RCM) DIAGNOSTIC TROUBLE CODE (DTC) TABLE in this article for pinpoint test direction.
- No : RECONNECT the system. If previously directed to deactivate the system, REACTIVATE the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION in this article. REPOWER the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING in this article. PROVE OUT the system. CLEAR all DTCs.