Airbag light on

Tiny
BDAB68
  • MEMBER
  • 2005 HYUNDAI TUCSON
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 210,000 MILES
Okay I’m stumped at what to do next. My vehicle listed above GL model has been having an airbag light on for over 5 years. I have finally decided to try and fix the issue. When I scanned the vehicle I received 2 codes. B1334 and B1331. (B1334 PFIS to SRSCM communication error) B1331 PFIS short to ground). I started by by replacing the front passenger side impact sensor. I replace it with a used one in hopes to fix the problem. After replacement the B1331 code disappeared and I was only left with the B1334 code. I inspected all the wiring and see no issues at all. So I decided to replace the SRSCM. After replacing that the B1334 code disappeared and the B1331 was back. I removed the PFIS again cleaned it up to no avail. I replaced it again using the old sensor and both codes were back. So I put the other one back on and currently just seeing the B1331 code. I am stumped. Where are these sensors grounded? I assumed they grounded themselves when bolted to the chassis. Am I wrong? I guess the sensor I got from the junkyard could be defective as well but I’m just not convinced that’s the issue. My next day off I’m thinking of swapping the driver side with the passenger side to see if the code switches to the driver side. Than I can assume the sensor is bad. Any other advice or ideas on what the problem might be? Thank you for your help.
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Monday, March 9th, 2020 AT 10:31 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Did you have the replacement module reset? It could be the issue due to not being reset.

You would need to send it out to have this done as there is no procedure for this on the car.

The 1331 is a wiring issue, not a component issue. I attached the possibilities below.

The 1334 is also related to the harness as well.

Roy
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Tuesday, March 10th, 2020 AT 2:51 AM
Tiny
BDAB68
  • MEMBER
  • 30 POSTS
Yes the new SRSCM was reset according to the company I purchased it from. I’m new to detecting electrical issues so please bear with me as I attempt trying to learn and fix this issue. When I look at the wiring diagram it looks like the wire for the PFIS goes from the sensor, along the side fender, behind the glove box, down the center instrument panel than into the SRSCM. When I’m looking under the hood I see that the cable is joined by several other wires. This includes wire for headlight, alarm horn, the ABS module and a thick black box with a yellow release lever attached to it. (See photo I attached). I’m not sure what this is but assume it’s part of the ABS. I saw yellow and at first thought it had something to do with the SRS as they usually always use yellow. The yellow lever that was on it was broken off. If I was to attempt to replace the harness for the sensor would it be one continuous harness I would need to fish from the sensor to the SRSCM or is their a break in the wire with another connector? The wire looks great inside the vehicle. The connector that connects to the PFIS looks a bit rough compared to the driver side. The driver side wire and sensor looks as if they are brand knew they are so clean but the passenger side looked dirty and rusty. I cleaned it all off and it looks a lot better. Thank you so much for all your help. I really appreciate it. I’m hoping to give this car to my son and talk my wife into getting a new car. But I want this car to be safe for him so I really want this fixed.
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Tuesday, March 10th, 2020 AT 7:46 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You have a harness issue. The harness is one piece from beginning to end.

Roy
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Tuesday, March 10th, 2020 AT 1:42 PM
Tiny
BDAB68
  • MEMBER
  • 30 POSTS
Thank you. So you think it has a pinch or slice somewhere in the line causing it to groundout? Or even possibly a bad connector at one of the 2 ends? I’m going to swap the driver side and passenger side sensors tomorrow. If the code switches to the driver side than I’ll at least know it’s the sensor. If it doesn’t than I guess I’ll be pulling the dash and fender. Really hope I don’t have to go that route. Thanks for the help.
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Tuesday, March 10th, 2020 AT 7:43 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Keep me updated.

Always glad to help.

Roy
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Tuesday, March 10th, 2020 AT 8:05 PM

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