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Air bag light on. Yes another.

 
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Old 04 Feb 2018, 08:55 pm
Young Cruiser
 
Join Date: Nov 2016
Posts: 59
Default Air bag light on. Yes another.

2009 NA, automatic.

SRS light is on. Codes say that the drivers side seat position sensor is not working. Low voltage.
The passenger side is not throwing a code, but it is not working either. Moving the seat makes no difference in the readings. The passenger side weight sensors are working.

So I switched the position sensor from each seat with the other. No change in reading.

Seems hard to believe that both seat position sensors have failed.

Using this logic, I'm guessing its the SDM control module. Or the ORC module, or the OCM module. Near as I can tell this is the module under the console with the big yellow connectors.


I don't have wiring diagram so I'm kind of flying blind here. And the cheapest new SDM I've found is a couple of hundred bucks, plus it has to be synced the cars computer.

Thoughts? Am i missing something? j
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Old 04 Feb 2018, 09:54 pm
Obsessed Cruiser
 
Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,337
Default Re: Air bag light on. Yes another.

Quote:
Originally Posted by JohnPT View Post
2009 NA, automatic.

SRS light is on. Codes say that the drivers side seat position sensor is not working. Low voltage.
The passenger side is not throwing a code, but it is not working either. Moving the seat makes no difference in the readings. The passenger side weight sensors are working.

So I switched the position sensor from each seat with the other. No change in reading.

Seems hard to believe that both seat position sensors have failed.

Using this logic, I'm guessing its the SDM control module. Or the ORC module, or the OCM module. Near as I can tell this is the module under the console with the big yellow connectors.


I don't have wiring diagram so I'm kind of flying blind here. And the cheapest new SDM I've found is a couple of hundred bucks, plus it has to be synced the cars computer.

Thoughts? Am i missing something? j
Can you post the codes that you got?
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Old 04 Feb 2018, 10:16 pm
Young Cruiser
 
Join Date: Nov 2016
Posts: 59
Default Re: Air bag light on. Yes another.

B223D Occupant classification module

B1B8D seat track

B1BA3 active DTC in occupant classification module
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Old 05 Feb 2018, 12:38 am
Young Cruiser
 
Join Date: Nov 2016
Posts: 59
Default Re: Air bag light on. Yes another.

For my own and maybe others clarification. There are 2 separate modules. OCM, occupant classification module (located under passenger seat). ORC, Occupant Restraint Control Module (located under the console on the tunnel).

The OCM gathers info from the seat sensors. Seat position and passenger yes/no.
The OCM sends this info to the ORC. The ORC, sometimes called the airbag module then decides if and how forcefully to deploy the airbags.

Still not sure about my issue but I'm getting more educated anyway!
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Old 05 Feb 2018, 12:49 am
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Location: Texas
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Default Re: Air bag light on. Yes another.

Quote:
Originally Posted by JohnPT View Post
2009 NA, automatic.

SRS light is on. Codes say that the drivers side seat position sensor is not working. Low voltage.
The passenger side is not throwing a code, but it is not working either. Moving the seat makes no difference in the readings. The passenger side weight sensors are working.

So I switched the position sensor from each seat with the other. No change in reading.

Seems hard to believe that both seat position sensors have failed.

Using this logic, I'm guessing its the SDM control module. Or the ORC module, or the OCM module. Near as I can tell this is the module under the console with the big yellow connectors.


I don't have wiring diagram so I'm kind of flying blind here. And the cheapest new SDM I've found is a couple of hundred bucks, plus it has to be synced the cars computer.

Thoughts? Am i missing something? j
I sent you a PM with a link to download a copy of the Service Manual from my DropBox.
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Old 05 Feb 2018, 12:58 am
Young Cruiser
 
Join Date: Nov 2016
Posts: 59
Default Re: Air bag light on. Yes another.

Thanks!
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Old 05 Feb 2018, 04:42 am
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Join Date: Jun 2014
Location: southeastern PA
Posts: 314
Default Re: Air bag light on. Yes another.

Could be a wiring problem. I had a persistent low voltage code on a TPS (throttle position sensor). Replaced the sensor, didn't fix it. Checked the resistance on all the wiring between the TPS and computer. The +5V feed wire had very very high resistance, broken deep in the wiring loom. I spliced in a wire to bypass the loom and it's been fine since.
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Old 05 Feb 2018, 05:33 pm
Young Cruiser
 
Join Date: Nov 2016
Posts: 59
Default Re: Air bag light on. Yes another.

Thanks everyone the problem is solved.

the connector at the front left of the drivers seat had two pins pushed out. The very two pins that go to the seat position sensor.

Why both of those pins were out is anyone's guess.

Pushed back in, no more srs light.

If you look close at the pic you can see the offending pins.

j
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Old 05 Feb 2018, 05:56 pm
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Default Re: Air bag light on. Yes another.

Quote:
Originally Posted by JohnPT View Post
Thanks everyone the problem is solved.

the connector at the front left of the drivers seat had two pins pushed out. The very two pins that go to the seat position sensor.

Why both of those pins were out is anyone's guess.

Pushed back in, no more srs light.

If you look close at the pic you can see the offending pins.

j
That's crazy

Had you recently had your vehicle worked on at any shop?
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Old 05 Feb 2018, 06:08 pm
Young Cruiser
 
Join Date: Nov 2016
Posts: 59
Default Re: Air bag light on. Yes another.

No shop work that I know of. The car is a repo I've been trying to resurrect.
who knows what its past has been. j
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