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post #1 of 11 (permalink) Old 03-18-2017, 05:10 PM Thread Starter
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Exclamation Air Bag Light On

Hello all. I have joined this fourm as a proud new owner of a 2005 Hyundai Accent GLS that needs some TLC.

So here is the situation when I got the car the person dropping it off said the airbag light came on on their way. I went out today and got an OBDII Scanner capable of reading ABS And SRS as well.

Upon Plugging it in and doing a read i got a B1352 - Passenger Airbag Resistance too High (1st Stage) Present

So after reading it seemed there was a lot of problems with a passenger seat occupancy sensor, I took the seat out and there is no sensor in the seat. There is however a yellow wire running over to the bottom of the seat belt (assuming this is for airbag).

As well car had an aftermarket CD player professionally installed by connect pro at future shop years ago. I took glove box out, center console, and cd player etc. I can now see all airbag wiring/ connectors from the cd player over on passenger side. All wiring looks great no tears etc. All connectors are nice and clean, without corrosion or rust.

Any ideas of what may be going on here? I am assuming not a clock spring as it would show a DAB no PAB? Would an impact sensor cause this code?

Any other ideas? Car only has 125k on it and no rust etc, so I am really at a loss of ideas here.
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post #2 of 11 (permalink) Old 03-18-2017, 09:48 PM Thread Starter
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I may have found the issue. The srs unit has sever corrosion in the top side and bottom that looks like it has gone inside the unit. Going to take apart and check for internal corossion.
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post #3 of 11 (permalink) Old 03-18-2017, 10:06 PM
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check the connectors at the back of the passenger side airbag. There should be 2. One for the first stage, and one for the second
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post #4 of 11 (permalink) Old 03-19-2017, 09:42 AM Thread Starter
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Originally Posted by ASE Hyundai Tech View Post
check the connectors at the back of the passenger side airbag. There should be 2. One for the first stage, and one for the second
That was the second thing i did after looking at the seat to find it did not have a sensor cushion.

The connector looked fine no sign of corrosion etc, looked brand new.

As far as i can tell there is only 2 wires running from srs module to passenger airbag, and connected in between. I took out srs module and man is it cheesy, the connector side is clean, but the opposite side looks like a battery exploded on it. Underneath where the cover is the corrosion appears to go right into the unit, it has anti tampers so i am trying to find a set to borrow so i can see if there is board corrosion inside.

Will update progress as i go. car doesn't even have 150k on it, so why it is having random airbag issues like this is beyond me. Lets alone why the srs module which is affixed in cabin looks like someone went boating with it.
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post #5 of 11 (permalink) Old 03-19-2017, 10:17 AM
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Any way you can get your hands on a "known good" unit from a salvage yard or something to swap it out with? Resistance High codes usually mean there is a open between the Srs module and the airbag igniter. But it could also be internal if the unit looks as bad as you say
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post #6 of 11 (permalink) Old 03-19-2017, 10:46 AM
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What I'd suggest is, switch the ignition off and disconnect the passenger airbag on the dash. Use a short link wire to bridge the two terminals of the airbag harness connector together

Switch the ignition back on and use your scan tool and recheck your trouble code. With the terminals of the connector linked you should have a resistance too low code logged rather than the original resistance too high code (although the original code might still be displayed as historic/intermittent). If you do indeed get a resistance too low code logged your airbag control module and wiring is OK and it's the airbag itself that's faulty.

Good luck!

Scottie.
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post #7 of 11 (permalink) Old 03-19-2017, 04:16 PM Thread Starter
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No way of getting a known good unit. Will crossing the 2 wires for the pab not deploy the system? And no worries about history codes i can clear them.

Would just disconnecting the airbag and turning ignition on show any difference? I got the srs module apart. There was no corossion at all on the inside so that doesnt appear to be the issue.
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post #8 of 11 (permalink) Old 03-19-2017, 05:52 PM
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Quote:
Originally Posted by Dugie33 View Post
No way of getting a known good unit. Will crossing the 2 wires for the pab not deploy the system? And no worries about history codes i can clear them.

Would just disconnecting the airbag and turning ignition on show any difference? I got the srs module apart. There was no corossion at all on the inside so that doesnt appear to be the issue.
SRSCM has determined there be an open circuit in the PAB squib circuit, be it poor connect/loss of connect exploder ignitor.. most likely is poor connect at PAB Stage 1 connector..

You can inspect circuit as noted by brother Autospark,, SRSCM should add a "LOW" resistance DTC as ACTIVE if circuit shorted via connector,, SRSCM knows there should be 2.x ohm on circuit if ignitor intact,, less than 2 ohm give us a "LOW" resist, open circuit give us a "HIGH" resist.. this is what SRSCM is constantly checking on all the "exploders",, DAB 1 & 2, PAB 1 & 2, seat belt tensioners both side, buckle tensioner both side, curtain bags both side.

Need to be aware of the lock tab in middle of connector that pull part way out to allow connector removal from squib.. places have replaced parts, and lost the lock device,, that operates a short bar within the connector,, so you need to be aware when you assemble connector back,, seat connector firmly, then push tab into place..

Shorting harness to verify circuit will not blow off system.. need real heavy impact to close an impact sensor and the "G" sensor in the SRSCM to fire off the squibs as determined by SRSCM..

DO NOT USE DVOM TO TEST IGNITOR ON SQUIB !!!! IT'll go "BOOOOM"...... I have set off scrap squibs prior to disposal with a simple "AA" battery.

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post #9 of 11 (permalink) Old 03-20-2017, 03:47 PM Thread Starter
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Alright so since the unit was heavily corroded i opened it up cleaned all the corrosion off the unit with a rotary tool and treated the corroded board within with my secret liquid damage repair technique. I then reassembled the srs unit (without those pesky antitampers i had to drill out. I also took apart all the connectors pulling each wire out and individually cleaning every single connector into the main unit, the squib at passenger side, and the airbag connector on the passenger seat belt.... I reassembled it and got a history code, cleared srs shut vehicle down started and tested again and no more code...
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post #10 of 11 (permalink) Old 03-20-2017, 05:50 PM
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I reassembled it and got a history code, cleared srs shut vehicle down started and tested again and no more code...
That's great news. Glad it was a cheap repair.

Thanks for taking the time to post back and let us know the outcome.

Scottie.
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