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Old 09-14-2013, 12:06 AM   #1
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Default Service Stability System-no DTC codes

My 01 SSEi started randomly showing the SSS message in DIC. Traction control is not being disabled, nor is there any ABS warning...just the DIC message.

I am leaning towards the SWPS after graphing its output even though as said, no DTC is present. I use Autoenginuity with GM enhanced so I can access and clear DTCs from all modules. That'* also how I graphed the position sensor A and B inputs. The B side does respond to steering activity, but it hovers at a much lower voltage than the A side. I read a document last night that will tell you all you ever want to know about this style SWPS and then some.

Sensors - Articles

Also read another page with some good info about the workings of the Stabilitrak system.

Without having a graph of a known good sensor for a baseline, I'm not sure if that low output on the B side is the issue or not.

The Yaw and lateral acceleration sensor outputs are normal. They have a 0 to 5 volt output and put out about 2.5 volts when there is no force applied to the sensor.

I've had a failed WSS before on an aftermarket hub, and it will disable TCS and ABS as indicated on the dash cluster, so I don't think a WSS is the issue. Besides, as I understand from reading up on it, the WSS does not play a part in the Stabilitrak operation. The VSS from the transaxle provides the vehicle speed for VSES purposes.

Has anyone with a Tech II ever watched the A and B inputs as the steering wheel was turned through its range?

Any help is greatly appreciated.

Thanks,

Greg
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Old 09-14-2013, 12:39 AM   #2
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My 08 SRX did the same thing about a year ago. Input a didn't sense any movent. I cleared the codes and was going to order a new sensor but the indicator hasn't came back on in a year now so I haven't worried about it.
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Old 09-14-2013, 12:40 AM   #3
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I can't remember the DTC number sorry
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Old 09-14-2013, 01:35 AM   #4
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Originally Posted by 75 racer View Post
My 08 SRX did the same thing about a year ago. Input a didn't sense any movent. I cleared the codes and was going to order a new sensor but the indicator hasn't came back on in a year now so I haven't worried about it.
Thanks for the info, I just wish I had a code to clear. At least that would point me in the right direction. The codes associated with a failed SWPS and the GM troubleshooting steps are posted in several forums. I'm going to proceed with the troubleshooting steps and see what I come up with... code or no code.

Regards,

Greg
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Old 09-14-2013, 02:46 AM   #5
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In the back of my mind there was a TSB on the SWPS from back in my dealership days but that was many beers and 2 kids ago. I so miss having access to the GM service website to look things like this up.
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Old 09-14-2013, 03:04 AM   #6
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In the back of my mind there was a TSB on the SWPS from back in my dealership days but that was many beers and 2 kids ago. I so miss having access to the GM service website to look things like this up.
I've seen that TSB. It is for 'rare' occurrences of the SSS on the DIC. Mine is fairly frequent.. ie at some point during a drive of any reasonable length. It does involve reprogramming the EBTCM due to being overly sensitive to SWPS inputs.

I'm going to do some checks to make sure all the wiring harness and connectors are good. I've had more than my share of faulty connections on this car. One of them was right at the driver'* airbag. I would have guessed clock spring and I gave that a thorough test... but nope, the flaky connection was right on the dang plug for the airbag. This is my spouse'* daily driver and I try to keep it free of ding dong noises and idiot lights cuz that makes her nervous.

Greg
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Old 09-14-2013, 09:10 AM   #7
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at least it makes her nervous, there are alot who dont pay attention
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Old 09-14-2013, 02:33 PM   #8
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at least it makes her nervous, there are alot who dont pay attention
It required a bit of training and encouragement. I used to get very delayed notifications like, "oh by the way, the service engine light came on a few days ago."
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