Stability control-traction active message

[68skylark455]

No its not a diesel but I need and expert-Pat said to ask Mike L.
2003 Escalade 6.0 AWD
I was using efilive to record a drive trip to see if I could find the problem with this Escalade . It throws out a "traction active" message and basically hesitates then takes off. It also sometimes says "service ride stability".
My question is this-during the log at 16mph-797rpm-14% accel pedal it dropped the gear ratio value from 3.73 to 0.14 for just a few seconds.
Where is this signal coming from? It has 4 ABS sensors and a VSS. Gm dealer said they can't even read what I am reading let alone tell me where the input comes from.
Just trying to fix it. Any ideas would help. Thanks, Larry

 

[duratothemax]

"service ride stability" is not a valid message...what does it really say? "service stability system" or "service ride control".

you need a tech 2 to diagnose VSES issues. efilive isnt going to help at all with this sort of problem...

ben

 

[68skylark455]

"service ride stability" is not a valid message...what does it really say? "service stability system" or "service ride control".

you need a tech 2 to diagnose VSES issues. efilive isnt going to help at all with this sort of problem...

ben

Its service stability system and service ride control. The ride control pump is bad this we know. I was just using efilive to record a drive log of what sensors I could. The tech 2 we used only showed a problem with the steering sensor on the column but never sets a code. When your driving with the wheel straight it sometimes shows as much as 180* and then goes back to zero. We have one ordered should be in today.I was just wondering where the gear ratio signal comes from. What sensor? Thats all. EFILive actually was giving me some information that the tech 2 couldn't. Not sure if its even valid info, just thought it was weird that at the same time it acted up we lost the gear ratio signal.

 

[duratothemax]

Its service stability system and service ride control. The ride control pump is bad this we know. I was just using efilive to record a drive log of what sensors I could. The tech 2 we used only showed a problem with the steering sensor on the column but never sets a code. When your driving with the wheel straight it sometimes shows as much as 180* and then goes back to zero. We have one ordered should be in today.I was just wondering where the gear ratio signal comes from. What sensor? Thats all. EFILive actually was giving me some information that the tech 2 couldn't. Not sure if its even valid info, just thought it was weird that at the same time it acted up we lost the gear ratio signal.

Anything that EFILIve is giving you that the tech 2 isnt is erroneous. Its not a valid reading/doesnt mean anything because on the SUV's with VSES (stabilitrak) the VSS signal that the PCM gets is basically for its own internal reference, and to drive the speedometer. The EBCM doesnt really use it because it has its own 4 discrete wheel speed sensors to reference individual wheel speeds. When a VSES event occurs the PCM bypasses its own VSS interpretations (from the xfer case mounted sensor) and starts getting VSS data from the EBCM's wheel speed sensors so it can continue to get a proper indication of wheel speed...because when a VSES event occurs, obviously the output speed sensor on the xfer case theoretically isnt actually how fast the vehicle is traveling. Once the oversteer/understeer condition is corrected by teh EBCM, the VSS signal distribution returns to normal operation/routing, so Im guessing thats why efilive is giving you weird VSS/gear ratio readings.

the steering wheel position sensor must be bad...because if its reading 180* out, then the EBCM thinks you are trying to make (have the wheels turned) a hard left or right hand turn while the yaw/lateral acceleration sensor is saying "whoa wait a minute, we're still going in a straight line even though the driver is trying to make a hard turn"

make sense?

Basically, for diagnosing this type of VSES issue, dont listen to efilive.

ben

 

[68skylark455]

Thank you, we were believing it was all in the sensor and its here so just waiting on the vehicle to get here. EFILive did help with one thing-now it will be easier to put the 6.0 in my firebird

 

[68skylark455]

We fixed it today. First "new" hub assembly sensor hole was miss bored-sensor was at an angle. New hub and all is well. Also, new speed sensor in transfer case fixed the dissappearing gear ratio problem.