Active Handling System

[rproulx]

Periodically I get the message "Active Handling System Warming up". This occurs after the car has been run for a while, shut down for a short period. Does not happen all the time.

 

[Tuna]

It's a normal information message. While it is warming up, you will not get active handling.

I've seen this message on initial start up on a cold day and on a restart in humid and cool conditions after only a short stop.

It's nothing to be concerned about except that you shouldn't demand maximum performance from the car will this message is on as the car will not help you out.

 

[modman]

I see the same thing after I shutdown and go away for awhile (an hour) and then I get the warming up message. Only seems to happen once in a while and always seems to "time in" after a short period.
(2 minutes)

 

[rproulx]

Mine acts as modman indicates. I cannot believe that a sometimes event is normal. Especially after the car has been driven and all systems are indeed warmed up.

This is very much like the erratic fuel gauge readings and tire pressure readings I had on my 00 Vette.

I'm guessing that GM has no real answers on the internal computers.

 

[Skull One]

Mine acts as modman indicates. I cannot believe that a sometimes event is normal. Especially after the car has been driven and all systems are indeed warmed up.

This is very much like the erratic fuel gauge readings and tire pressure readings I had on my 00 Vette.

I'm guessing that GM has no real answers on the internal computers.

Ok, maybe a little lesson in what the system is and why it has to be at the proper temp to work before you go bashing GM.

There is a g-force sensor (accelerometer) package behind the ashtray.
The sensor package is made of solid state components. IE: Plastic, Ceramic and Silicon.
This sensor measures the yaw rate, wheel speed/spin, accelerator position and steering input to determine if the back end is comming around faster than it should be.

For a solid state g-force sensor to work properly it must come up to a certain tempature that is within so much of the overall package (IE mounting and other components) tempature around it. Since plastic/ceramic/silicon cools faster than the rest of the overall package, it can takes a few mins to stabilize the temp of the sensor to the package. When everything is at the same temp to begin with, IE in the morning, then the system can calibrate and do proper g-force detection right off the bat. Tunnel heat is the single biggest issue for making the overall package temp differ from the one very sensitive component (accelerometer) inside the package.

Hope that helps clear part of this up. And yes, this is a VERY basic explanation and I did cut a few corners. But I don't think you want the long drawn out explanation

 

[eccm]

Hello all,
is the message "Active Handling System Warming up" appear at each starting?
I have 2001 ( with as like as all 2001: RPO JL4) since 6 month I never see it ...
sorry for my english I'm French

 

[DRTH VTR]

sorry for my english I'm French

Your English is MUCH better than my French!