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2009 Pontiac G6 Airbag light

Tiny
ZELLERDEREK4
  • MEMBER
  • 2009 PONTIAC G6
I've been having a problem with my airbag light coming on intermittently wen I turn left and when I turn right it will got off the dic says service airbag and I can't get any codes I printed out a few schematics and I've checked the harnesses under the seats to make sure none were loose or broken so I have come to the conclusion that it must be a wire somewhere in the column I'm Hoping it's not the clock spring and was wondering if anyone knew exactly where the connectors are located in the dash so I don't have to pull the whole thing out wen looking for it or if anyone has had this problem
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Wednesday, March 5th, 2014 AT 5:15 PM

10 Replies

Tiny
TY ANDERSON
  • MECHANIC
  • 684 POSTS
Any failures will be stored in the air bag computer and if the warning is currently off the computer will store the failure as a history code. There should be a code in the system. You'll need to get access to a compatible scan tool to get those code(s). With out any codes it will be extremely difficult to diagnose every single component that can cause the warning to display.
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Wednesday, March 5th, 2014 AT 5:35 PM
Tiny
ZELLERDEREK4
  • MEMBER
  • 63 POSTS
I had it hooked up to a scanner that reads engine abs and airbag modules today and there were no codes to be found the only thing I saw was that the evap wont test out and I already knew that bc I constantly have a scanner on the car while drive due to the fact it works via bluetooth may I also add that every now and then the car will die in the mornings even though I just replaced the battery alternators putting out 15.2 volts and the codes it was throwing before the airbag kept coming on was u 2105 u2107 and for a week it had I believe c0899
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Wednesday, March 5th, 2014 AT 6:02 PM
Tiny
TY ANDERSON
  • MECHANIC
  • 684 POSTS
A factory scan tool or a high end scan tool will show past or history codes that have been flagged. Most aftermarket scan tool will only show current code meaning the warning light has to be on to catch the code before the vehicle's computer will shut it off again.

The codes you gave me have to do with the communication between computers in the vehicle. U2105 is the engine/transmission computer. U2107 is the body computer (interior lighting etc.) And C0889 is the electronic brake computer (abs/traction control) has detected low voltage. If any of these codes are still present then there is an issue but it sounds like there not any more. These codes were most likely cause by the electrical system. Changing the battery and alternator has corrected that.
15.2vts isn't that uncommon because this charging system is control by a computer and the computer will adjust the charging output as needed.

As for the air bag light, have you been able to capture a fault code with your scanner when the light comes on? Do both of these test with the key on engine running ***DO NOT disconnect any connector at this time*** Try wiggling the electrical connectors under the seat connected to the seat belt buckle (if your vehicle is a 2 door let me know because the cobalts and pontiacs have history with the seat belts triggering intermittent air bag warning light). Wiggle the electrical connector at the air bag computer (its under the center console and has a 60 pin connector).

Does your vehicle stall at idle or when driving?
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Thursday, March 6th, 2014 AT 5:23 PM
Tiny
ZELLERDEREK4
  • MEMBER
  • 63 POSTS
It is a 4 door I have tried the tap and wiggle procedure under the seats while it was running and got no light havent gotten access to the module yet and my next step on my next day off is to do the tap and wiggle test on the connectors under the dash
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Thursday, March 6th, 2014 AT 8:27 PM
Tiny
TY ANDERSON
  • MECHANIC
  • 684 POSTS
Ok, let me know what you find.
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Friday, March 7th, 2014 AT 4:50 PM
Tiny
ZELLERDEREK4
  • MEMBER
  • 63 POSTS
So as I just took apart the dashto tap and wiggle some wires the airbag light is not comming on which it hasnt since I posted this question im thinking maybe bc the car is warm maybe it has a better connection so I am running the ac for 30 mins while its 38 outside to see if that helps show some issuse all the codes are still gone and I havent cleared them and the evap sys still wont test out after over 2000 miles from what I remember I still have yet to get access to the module which im alil iffy about bc I tone wanna screw up the shifter like I have in the past bc the crome backing and collar doesnt like to fit back in place
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Sunday, March 9th, 2014 AT 7:52 AM
Tiny
ZELLERDEREK4
  • MEMBER
  • 63 POSTS
Finally got the airbag light to come on weather I was leaning on the passenger seat or moved a wire while takng out the glove box but while I was wiggling some wire connected to the bcu I believe, it was under the radio, I was simultaneously leaning on the seat where I felt a plastic box which I think is the pps the unit that reads if someone is in the seat. And not keeping pressure on it the airbag light kept going on and off so I found 2 possible spots where the problem could be coming from I also pulled the 2 airbag fuses 1 at a time to see if it would have any effect on the light and the only 1 that did was the airbag(batt) fuse prob meant nothing since the fuse prob just opened the circuit any ideas and any wiring diagrams u could possibly come up wit if I cant find any? Would be much apreciated
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Sunday, March 9th, 2014 AT 8:35 AM
Tiny
ZELLERDEREK4
  • MEMBER
  • 63 POSTS
So I have come to the final conclusion that it is the passenger sensing unit in the seat but am having trouble figuring out how to take the seat apart to get complete access to it is there any diagram or video that u no of that I can use to guide me thru this process I am knowledgeable with the function of the rest of the car but have never needed to dismember a seat and the way that the seat is designed it is difficult for me to remove it with out proper diagrams
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Sunday, March 9th, 2014 AT 10:06 AM
Tiny
SBROTHEN
  • MEMBER
  • 3 POSTS
Typically there will be a yellow connector at the base of the column for the driver airbag. There should be a history code set as to why the airbag light is on. The 'Z' body cars are known to have issues with the connectors at the seats as well, I would disconnect those connectors, apply dielectric grease to them and reinstall them. They are under the front part of the seat. If they can't be accessed with the seat in there are 2 bolts I believe 13 or 15mm holding the rear part of the seat to the floor, with them out lift the back of the seat up and pull rearwards to disengage the front retainers. Hope this helps :-)
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Monday, March 10th, 2014 AT 10:43 AM
Tiny
ZELLERDEREK4
  • MEMBER
  • 63 POSTS
I pulled the sea out yesterday and found that wires going to the module was pinched and have poor connection the mat is intacted and the dealer wants 650 for the part so I am going to try to open the module with a dremel and so on bc the module is filled with silicone is seems like
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Monday, March 10th, 2014 AT 5:24 PM

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