Airbag light on, no apparent reason

[TARA-fied1]

the other day my airbag light and wrench light came on while I was driving. When I got home I hooked my laptop and checked with FORscan. The RCM can't read the DTC, the OCS has lost communication as well as ABS and instrument cluster have U0151 codes. I pulled console and the RCM is plugged in solidly and bolted down tight, etc. Does this indicate the RCM went bad?
**EDIT** my post got moved which is okay. But I should add that my car is a 2007 body but everything else is from a 2012. Interior, ALL the wiring, sensors, dash, steering column, HVAC, suspension, fuel system, engine, trans, etc. etc. and I did the swap a year or so ago. Everything has been working fine until the other day.

 

[moooosestang]

I assume you mean ecm? I thought only dealers could read airbag codes? some safety bs. Your clockspring in the steering will could have failed or failing. does the cruise still work?

 

[JC SSP]

Has your car had the air bags recall performed?

 

[yote0]

Check for water intrusion in the SJB.

 

[TARA-fied1]

I assume you mean ecm? I thought only dealers could read airbag codes? some safety bs. Your clockspring in the steering will could have failed or failing. does the cruise still work?

I am referring to the restraints control module. It's the airbag control module mounted in the console. The cruise does still work. FORscan cannot read the DTC or code. FORscan is software you can use to diagnose the codes and even change certain things.

 

[TARA-fied1]

Has your car had the air bags recall performed?

technically yes but my car is a bit different. It's a 2007 body but has everything from a 2012, and I mean everything. I did the swap a year ago.

 

[TARA-fied1]

Check for water intrusion in the SJB.

thanks for the suggestion. That has been thoroughly checked.

 

[JC SSP]

Yes I remember now that car was nicely converted. Check if the harness under the seat has been pinched. Just a suggestion…

 

[moooosestang]

technically yes but my car is a bit different. It's a 2007 body but has everything from a 2012, and I mean everything. I did the swap a year ago.

Well that complicates things.

 

[TARA-fied1]

Yes I remember now that car was nicely converted. Check if the harness under the seat has been pinched. Just a suggestion…

Thanks, I did check that and the sensors in the rocker panel as well as the module itself. all the connections and wires look okay.

 

[TARA-fied1]

Well that complicates things.

One would think so but not really, the entire 2012 "stuff" is in the 07 body just like it was in the 2012 body. It's been working fine for a year. The systems don't know what year the body is.

 

[Laga]

Play around and wiggle with the wires and connections under the seats and see if the light goes off.
My 05 airbag light would come on occasionally. After checking the connection under the seats, everything , the wires and connections looked normal. Finally, I cut the wires and spliced in new connections. No more airbag light.

 

[TARA-fied1]

Play around and wiggle with the wires and connections under the seats and see if the light goes off.
My 05 airbag light would come on occasionally. After checking the connection under the seats, everything , the wires and connections looked normal. Finally, I cut the wires and spliced in new connections. No more airbag light.

I'll give that a try but FORscan does see the OCS (occupant sensor) or at least is can tell it has lost communication with the RCM. But it's worth a try!

 

[TARA-fied1]

i pulled the fuse, tested it. I unplugged the seat harnesses, the seat belt too. visually they looked clean and were snuggly plugged in. None of this changed anything.
I am reasonably convinced it is the RCM gone bad. I just don't know how to test it to be 100% sure. They are expensive... https://www.fordpartsgiant.com/parts/ford-sensor-assy-air-bag_br3z-14b321-a.html