Active Handling: Death Trap
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 835
Likes: 21
From: Mooresville NC
Active Handling: Death Trap
Hey everyone,
Has anyone else had the issue of active handling engaging @ high speeds? I was doing a quick run in my car about a week ago, got up to the 120-130 mark and the car immediately pulled left, barking the tires and everything. Scared the bejeezus out of me.
The "Active Handling" light came on for a moment when this happened as well...
WTF is going on with?! Have you guys had this issue and determined a fix? I do have aftermarket wheels / tires on the car as well.
Thanks!
Has anyone else had the issue of active handling engaging @ high speeds? I was doing a quick run in my car about a week ago, got up to the 120-130 mark and the car immediately pulled left, barking the tires and everything. Scared the bejeezus out of me.
The "Active Handling" light came on for a moment when this happened as well...WTF is going on with?! Have you guys had this issue and determined a fix? I do have aftermarket wheels / tires on the car as well.
Thanks!
Safety Car
Joined: Jul 2009
Posts: 3,755
Likes: 190
From: Baton Rouge LA
St. Jude Donor '14, '16
Are your aftermarket tires in the same proportion front to back as stock, as in are your rear tires taller than your front tires larger by the same amount as stock?
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 835
Likes: 21
From: Mooresville NC
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 835
Likes: 21
From: Mooresville NC
Safety Car
Joined: Jul 2009
Posts: 3,755
Likes: 190
From: Baton Rouge LA
St. Jude Donor '14, '16
Safety Car
Joined: Jul 2009
Posts: 3,755
Likes: 190
From: Baton Rouge LA
St. Jude Donor '14, '16
Just as an fyi, the height difference between the heights of stock tires (285/35/19 and 245/40/18) is 1.2" and the difference between the heights of your tires are 1.5"
Some cars have been reported to be more picky about the tire size difference than others, and the difference in size can certainly make active handling think you're having an issue, so I wouldn't rule it out as the cause of your problem (even with the size differences being so close).
Some cars have been reported to be more picky about the tire size difference than others, and the difference in size can certainly make active handling think you're having an issue, so I wouldn't rule it out as the cause of your problem (even with the size differences being so close).
Burning Brakes
Joined: May 2008
Posts: 752
Likes: 28
From: Ottawa, Ontario
Just as an fyi, the height difference between the heights of stock tires (285/35/19 and 245/40/18) is 1.2" and the difference between the heights of your tires are 1.5"
Some cars have been reported to be more picky about the tire size difference than others, and the difference in size can certainly make active handling think you're having an issue, so I wouldn't rule it out as the cause of your problem (even with the size differences being so close).
Some cars have been reported to be more picky about the tire size difference than others, and the difference in size can certainly make active handling think you're having an issue, so I wouldn't rule it out as the cause of your problem (even with the size differences being so close).
The recall had to do with 2005's and early 2006's as I recall. The problem was with a connector at the base of the steering column getting pulled every time the telescoping column moved out. The fix was to place a "comb" on the connector to better support it when it got pulled by the wiring harness.
I have a 2005 that has not had the active handling issue......but then again, I do not use the exit feature (to save wear and tear on the connector) and I have had the comb installed.
There is a sticky on this topic at the top of this forum page.
Burning Brakes
Joined: Jun 2004
Posts: 1,200
Likes: 14
From: Playa Vista CA
I would look into the tire sizing first. That said, my buddies 2013 GS would do that new al stock. It would happen in curves but did not have to be going fast. When he went fast and it happened car got out of line. In his case it was the wheel/steering position sensor.
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Race Director
Joined: Aug 1999
Posts: 13,280
Likes: 2,509
From: Bluffton SC via Canton Oh
I've nevr had that issue but when I tend to track the car the AH is off. BUT I have a Cadi and on the Cadi forum those who have switch tires have had this issue so I do agree with the above......... might be the tires. But just switch off AH. At 130 something goes wrong AH will not be your friend.
Tech Contributor
Joined: Oct 1999
Posts: 41,042
Likes: 9,804
From: Charlotte, NC (formerly Endicott, NY)
What year is your car?
I doubt it is the tires. You have to separate the items that are triggered by differing tire sizes from the items that aren't. Traction Control and Engine Drag Control are triggered by rear tire being too small in relation to the front tire or too large in relation to the front tire. Active handling isn't triggered by the tires. It is triggered by a combination of inputs from the steering wheel position sensor, lateral G sensor and yaw rate sensor. Tire size and type could affect how the car reacts once AH is triggered since it is calibrated for the characteristics of the stock tires.
For it to activate when driving in a straight line the EBCM has to receive a signal from the steering sensor that the steering wheel was being turned in a certain direction. The other two sensors would have also reported there was no change in lateral Gs or in yaw rate. Then using the sensor data the EBCM would calculate how much braking had to be done on one of the front wheels to get the car to respond to the imagined turning of the steering wheel. In some cases the EBCM will react to the erroneous signal then after the brake is applied detect the signal is in error, set a code, turn off the system and display the Service Active Handling message. Once the message is displayed the system is shut off and will not turn on again until after the next engine start.
I would be looking for a steering sensor code or history code using a scanner that can read ABS codes. Secondarily I would be looking for lateral G or yaw sensor errors.
Bill
I doubt it is the tires. You have to separate the items that are triggered by differing tire sizes from the items that aren't. Traction Control and Engine Drag Control are triggered by rear tire being too small in relation to the front tire or too large in relation to the front tire. Active handling isn't triggered by the tires. It is triggered by a combination of inputs from the steering wheel position sensor, lateral G sensor and yaw rate sensor. Tire size and type could affect how the car reacts once AH is triggered since it is calibrated for the characteristics of the stock tires.
For it to activate when driving in a straight line the EBCM has to receive a signal from the steering sensor that the steering wheel was being turned in a certain direction. The other two sensors would have also reported there was no change in lateral Gs or in yaw rate. Then using the sensor data the EBCM would calculate how much braking had to be done on one of the front wheels to get the car to respond to the imagined turning of the steering wheel. In some cases the EBCM will react to the erroneous signal then after the brake is applied detect the signal is in error, set a code, turn off the system and display the Service Active Handling message. Once the message is displayed the system is shut off and will not turn on again until after the next engine start.
I would be looking for a steering sensor code or history code using a scanner that can read ABS codes. Secondarily I would be looking for lateral G or yaw sensor errors.
Bill
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 835
Likes: 21
From: Mooresville NC
My car is a 2005 WITHOUT telescopic steering wheel.
What year is your car?
I doubt it is the tires. You have to separate the items that are triggered by differing tire sizes from the items that aren't. Traction Control and Engine Drag Control are triggered by rear tire being too small in relation to the front tire or too large in relation to the front tire. Active handling isn't triggered by the tires. It is triggered by a combination of inputs from the steering wheel position sensor, lateral G sensor and yaw rate sensor. Tire size and type could affect how the car reacts once AH is triggered since it is calibrated for the characteristics of the stock tires.
For it to activate when driving in a straight line the EBCM has to receive a signal from the steering sensor that the steering wheel was being turned in a certain direction. The other two sensors would have also reported there was no change in lateral Gs or in yaw rate. Then using the sensor data the EBCM would calculate how much braking had to be done on one of the front wheels to get the car to respond to the imagined turning of the steering wheel. In some cases the EBCM will react to the erroneous signal then after the brake is applied detect the signal is in error, set a code, turn off the system and display the Service Active Handling message. Once the message is displayed the system is shut off and will not turn on again until after the next engine start.
I would be looking for a steering sensor code or history code using a scanner that can read ABS codes. Secondarily I would be looking for lateral G or yaw sensor errors.
Bill
I doubt it is the tires. You have to separate the items that are triggered by differing tire sizes from the items that aren't. Traction Control and Engine Drag Control are triggered by rear tire being too small in relation to the front tire or too large in relation to the front tire. Active handling isn't triggered by the tires. It is triggered by a combination of inputs from the steering wheel position sensor, lateral G sensor and yaw rate sensor. Tire size and type could affect how the car reacts once AH is triggered since it is calibrated for the characteristics of the stock tires.
For it to activate when driving in a straight line the EBCM has to receive a signal from the steering sensor that the steering wheel was being turned in a certain direction. The other two sensors would have also reported there was no change in lateral Gs or in yaw rate. Then using the sensor data the EBCM would calculate how much braking had to be done on one of the front wheels to get the car to respond to the imagined turning of the steering wheel. In some cases the EBCM will react to the erroneous signal then after the brake is applied detect the signal is in error, set a code, turn off the system and display the Service Active Handling message. Once the message is displayed the system is shut off and will not turn on again until after the next engine start.
I would be looking for a steering sensor code or history code using a scanner that can read ABS codes. Secondarily I would be looking for lateral G or yaw sensor errors.
Bill