Air Bag Light - LH Pre-tensioner (B1089)

[mikelbeebe]

Hi,

I have a 2007 Nissan Frontier. I have an air bag light coming on that I used to be able to reset using the documented process. I can no longer turn it off and the on-board diagnostic service (based upon flash pattern) is telling me LH Pre-tensioner problem. With fault code reader, I'm getting a "B1089, Pre-Ten Fron Left Hand Short".

I had already replaced the seat belt and pre-tensioner with genuine Nissan part. This seemed to temporarily fix the problem; however it has returned. I checked the pre-tensioner with an ohm meter and according to research, it's working properly because I got a 2.3/2.4 reading. I have also checked continuity of the harness between pre-tensioner and DSU and all seems fine. Those two steps were 1 and 2 for this fault code in the SRS Manual. The 3rd recommended step is to replace the DSU itself. I'm loath to spend $300 for a replacement on a truck that I only use from time to time. There are reset services, but I don't know that that's my problem. I do know the vehicle was wrecked prior to me owning it, but I was not getting a air bag warning light when I bought it. The DSU does not appear to be damaged in anyway.

Is there any way to do some testing on the DSU to see if that's really the problem?

[centralcoaster33]

Are you using a Factory Service Manual? No dianoses procedure for the DSU? It looks like it can be tested with a Consult-II (which I think is a dealership type computer). I too would want to make sure a $300 part has failed before replacing it. Maybe get a quote for dealership diagnoses of the SRS system.

Here's a link to the manual I looked at:
http://www.nicoclub.com/service-manual? ... ontier/srs

I found this video. They guy seems angry. He goes about finding a bad sensor I guess, part of a recall. It might help:
https://www.youtube.com/watch?v=RS1zPRqxkDU

[centralcoaster33]

I almost forgot, Welcome to NICO Club!