I asked the tech and he told me that for some reason the light came on after he cleared the codes in an attempt to fix the steering angle sesnor problem. I went out to the shop and got it calibrated but noticed an SRS warning lamp on. So just last Thursday, 10/25, I got a call for an 09 Tacoma that needed a steering angle sensor calibration done. By now I'm convinced there is something going on with the Snap-On software but I did'nt have a way to prove it and did'nt feel like wasting time trying to explain it to tech support. Coincidentally he had just had a Lexus the week before with exactly the problem I had described but in that case he had just assumed the shop screwed up so he did not look too deep into it. I called a fellow mobile tech and told him what I had been seeing.

I checked it out and confirmed that it does indeed need a seat cusion / OCS module. A tech had used a snap on tool to 'clear all faults' and then an SRS warning light came on with faults for OCS that were not there before. So a few weeks go by and I get another similar call with the same story. It got me thinking about what could have happened but since it was the first time I had heard of it I just noted it and kept moving. Each and every case required a new passengers seat cushion / OCS module to fix it. Several techs had suggested that possibly the snap on scanner had caused the problem. However, after doing a read all codes and clear all, the SRS warning lamp came on. I found several cases where techs had no airbag light on. They were adamant that the light was not on, so I started to research this problem. I asked what tool they were using and they said a Snap-On Modis Ultra was used. They said they had scanned it for faults and cleared those faults then the SRS warning lamp came on. I got curious so I asked specifically when they noticed the light on. The shop started telling me how the car had no airbag light on when it arrived but at some point it came on during the crash repair process. So I performed my diagnostics and found that the OCS module was bad and needed to be replaced. The zero point calibration procedure is a common thing that needs to be done on nearly every Toyota and Lexus that was in a rear-end collision. I tried to perform a zero point calibration procedure but it would fail every time. I found codes B1795-occupant classification ecu malfuntion and B1797-calibration abnormal. So rewind about 3 months ago when I got a call from a bodyshop to diagnose an airbag warning lamp on with fault codes stored on a 2011 ES350.

It's a bit of a long story but follow it to the end and I promise it'll be worth it.

I just want everyone to be aware of what I feel is a huge problem that should have been made known throughout our industry. First of all I am not trying to bad mouth Snap-on by any means. I wanted to share an issue that I have been noticing lately on some Toyota and Lexus vehicles.

Using labscope snap on modis ultra