Re-occurring issue

Dax Technician Colorado Posted   Latest   Edited  
Resolved
Safety
2018 Ford F-250 Super Duty XL 6.2L (6) 6-spd (6R140)
B0001-11
Airbag Light

Hello all, I'd like to preface this question by stating the vehicle has b0001:11 Driver side airbag deployment circuit short to ground.

This code has not gone away after replacing the clockspring, and the airbag. the original codes the vehicle had was B0001-2B - Driver frontal stage 1 deployment control signal cross coupled. I replaced the clockspring and the code changed to the current b0001:11, when doing pin point tests the code changed when the airbag was disconnected to B0001:13, and back when reconnected so i moved forward with replacing the airbag to no prevail. 

This truck has some major issues with wiring, and the wiring diagrams that Alldata, and identifix provides are not completely correct. the circuit shows that the driver stage 1 and stage 2 deployment circuits are yel/grn. and ppl/brn. this is true, however the wiring diagrams do not show that the yel/grn circuit also splits off into another connector near the RCM. I have no idea what that connector goes to. I assume the passenger side deployment. however the wiring diagrams say otherwise. This connector also has 2 non insulated ground wires. that could be caused by someone tampering. the entire wiring harness splitting off the main harness to the unknown connector is wrapped with basic electrical tape. and a lot of the pins in the harness have a lot of play. I'm presuming the harness is killing the YEL/GRN circuit aka as deployment circuit 1. and shorting it to the ground at the harness. however i am not 100% sure, and would like to know if any ford techs have any idea whats up with this. any information is useful, and appreciated. THANK YOU IN ADVANCE.

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Gary Owner/Technician
California
Gary
 

If the code description is “drivers side” it’s referrin to the side airbag in the seat, I would be looking at the connector under the seat. Try unplugging and plugging back in a few times and I bet your problem goes away.

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Steven Owner/Technician
Illinois
Steven
 

Have to agree 100 percent. Usually the seat plug gets kicked around and even though it looks plugged in it’s shorted. I’ve fixed many by disconnecting and reconnecting.

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Andrew Owner/Technician
Iowa
Andrew
 

B0001:11 Driver Frontal Stage 1 Deployment Control: Circuit Short to Ground B0001:2B Driver Frontal Stage 1 Deployment Control: Signal Cross Coupled These will be the steering wheel airbag. OP is on the right track. Just incorrect descriptions posted. B0001:11 is indicated when there is a short to ground. Considering you replaced clockspring and airbag it would stand to seem that you most…

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Dax Technician
Colorado
Dax
 

I have the kit and just attempted this. At the air bag and at the connector for the clock spring both times the code did not change it is still shorted to ground.

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Andrew Owner/Technician
Iowa
Andrew
 

Can you de-pin the connector at the airbag module and input the resistance at the module? If you aren't comfortable doing that then please don't. Looking at the wiring diagram, I do not see any other connectors between the airbag module and the clock spring. De-pinning those two wires from the airbag connector and substituting the resistance value would allow us to confirm the module is good and…

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Dax Technician
Colorado
Dax
 

Yes I added the resistor in place of the circuit at the connector. And I tested resistance throughout the circuit. The circuit has .45ohms of resistance on both circuits between the clockspring and the RCM. And after adding a 3 ohm resistor at the RCM the pid shows 0ohms. I’m pretty sure it’s a safe bet that the RCM isn’t functioning

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Andrew Owner/Technician
Iowa
Andrew
   

Wouldn't be a terrible idea to disconnect the two wires from the clock spring and from the RCM and load test the wiring, make sure its ok as well that voltage isn't shorting to the other wire. Good job though! Hindsight 20/20, do you feel better prepared to test for this code and find the failure on the first try?

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Dax Technician
Colorado
Dax
 

Well unfortunately After replacing the RCM I’m still not receiving a resistance reading. Even when adding an in line resistor. I opened the harness for the RCM 218B and couldn’t even find what I would think a shorting bar would be. It’s all just plastic. Something is definitely up with the wiring but I can’t figure it out for the life of me

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Dean Technical Support Specialist
New Zealand
Dean
 

Also, Just because it says "Drivers Side" don't blindly assume that it IS the Drivers side! Sometimes Scantools are written for LHD/RHD markets and the Data could be wrong.

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Mike Mobile Technician
South Carolina
Mike
 

There is most likely a tab on the connector at the airbag that is not seated correctly, or damaged. The airbag has a shorting bar that will short the circuits together. When the tab on the connector is locked in it will open the circuit. If you can't find it post some photos of the connector connected, amd disconnected from all angles.

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Dax Technician
Colorado
Dax Resolution
   

I found that the owners of the fleet company runs aftermarket tooling on the passenger footwell and drilled the mounting brackets into the main harness and the green / yel wire was grounding there. Thanks all that helped!

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