Weird Active Handling Problem
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Weird Active Handling Problem
I'm having an issue with my Active Handling System applying the right or left front brake when it is not needed. This occurs when I am cruising down the highway at steady speeds, traveling in a straight line.
When it occurs, you can feel either the right or left brake being applied momentarily, and the car will witch in one direction or the other. The DIC will flash "Active Handling" as it occurs.
I had the car into the shop, and they said they found a bad connection, which they repaired. Sure enough, 50 miles out on the road, the problem reoccurs.
My Actron is showing that no codes have been set. Referring to my chassis service manual, I would have expected any one of the variety of yaw sensor errors (C1281 through C1288).
Has anyone experienced this before? If so, how was it resolved?
When it occurs, you can feel either the right or left brake being applied momentarily, and the car will witch in one direction or the other. The DIC will flash "Active Handling" as it occurs.
I had the car into the shop, and they said they found a bad connection, which they repaired. Sure enough, 50 miles out on the road, the problem reoccurs.
My Actron is showing that no codes have been set. Referring to my chassis service manual, I would have expected any one of the variety of yaw sensor errors (C1281 through C1288).
Has anyone experienced this before? If so, how was it resolved?
Race Director
Joined: Mar 2005
Posts: 10,019
Likes: 17
Originally Posted by jwg2
I'm having an issue with my Active Handling System applying the right or left front brake when it is not needed. This occurs when I am cruising down the highway at steady speeds, traveling in a straight line.
When it occurs, you can feel either the right or left brake being applied momentarily, and the car will witch in one direction or the other. The DIC will flash "Active Handling" as it occurs.
I had the car into the shop, and they said they found a bad connection, which they repaired. Sure enough, 50 miles out on the road, the problem reoccurs.
My Actron is showing that no codes have been set. Referring to my chassis service manual, I would have expected any one of the variety of yaw sensor errors (C1281 through C1288).
Has anyone experienced this before? If so, how was it resolved?
When it occurs, you can feel either the right or left brake being applied momentarily, and the car will witch in one direction or the other. The DIC will flash "Active Handling" as it occurs.
I had the car into the shop, and they said they found a bad connection, which they repaired. Sure enough, 50 miles out on the road, the problem reoccurs.
My Actron is showing that no codes have been set. Referring to my chassis service manual, I would have expected any one of the variety of yaw sensor errors (C1281 through C1288).
Has anyone experienced this before? If so, how was it resolved?
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Originally Posted by 2000BSME
sounds to me like you have unequal tire diameters or inflation pressures. Just a guess, but I would look into it.
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Your AH issue is one I've not had on any of my C5s.
But I'd suspect a bad sensor or a loose wire to a sensor.
I'd take the car in to the dealer.
You'll need to prep the service advisor and tech that the problem is intermittent, so that they won't return the car as is, with the ticket marked "unable to duplicate the problem."
Ranger
But I'd suspect a bad sensor or a loose wire to a sensor.
I'd take the car in to the dealer.
You'll need to prep the service advisor and tech that the problem is intermittent, so that they won't return the car as is, with the ticket marked "unable to duplicate the problem."
Ranger
Le Mans Master
Joined: Sep 1999
Posts: 7,393
Likes: 7
From: Los Angeles CA
Take it to the dealer and indicate that this is a serious matter. I have a friend who had the AH lock one of the front wheels on a freeway offramp at around 50pmh and the car was totalled when it hit the wall.
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Originally Posted by allanlaw
Take it to the dealer and indicate that this is a serious matter. I have a friend who had the AH lock one of the front wheels on a freeway offramp at around 50pmh and the car was totalled when it hit the wall.
I do plan on taking it back to the dealer again, but I'm hoping the combined brain power of the forum can solve this, because the dealer obviously needs some help diagnosing this.
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Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Originally Posted by jwg2
I do plan on taking it back to the dealer again, but I'm hoping the combined brain power of the forum can solve this, because the dealer obviously needs some help diagnosing this.
A GM release on Active Handling
I took a few minutes to find the relevant passages in the Corvette Service Manual. You want Vol 1 of 3; page 5-190 and 5-191, entitled "Vehicle Stability Enhancement System Unwanted Activation (w/JL4)."
Read that, and if you can understand the details, it will poop you up for a conversation with dealer personnel.
If someone has the manual and a scanner, perhaps they can email him a pdf.
Ranger
Last edited by Ranger; May 19, 2005 at 07:34 PM.
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Originally Posted by Ranger
Here is a start.
A GM release on Active Handling
I took a few minutes to find the relevant passages in the Corvette Service Manual. You want Vol 1 of 3; page 5-190 and 5-191, entitled "Vehicle Stability Enhancement System Unwanted Activation (w/JL4)."
Read that, and if you can understand the details, it will poop you up for a conversation with dealer personnel.
If someone has the manual and a scanner, perhaps they can email him a pdf.
Ranger
A GM release on Active Handling
I took a few minutes to find the relevant passages in the Corvette Service Manual. You want Vol 1 of 3; page 5-190 and 5-191, entitled "Vehicle Stability Enhancement System Unwanted Activation (w/JL4)."
Read that, and if you can understand the details, it will poop you up for a conversation with dealer personnel.
If someone has the manual and a scanner, perhaps they can email him a pdf.
Ranger
no need to scan, I have the manual. I've read the section, just puzzled why its not throwing codes.
Safety Car
Joined: Sep 2000
Posts: 3,517
Likes: 528
From: Tampa, FL
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by jwg2
I'm having an issue with my Active Handling System applying the right or left front brake when it is not needed. This occurs when I am cruising down the highway at steady speeds, traveling in a straight line.
When it occurs, you can feel either the right or left brake being applied momentarily, and the car will witch in one direction or the other. The DIC will flash "Active Handling" as it occurs.
I had the car into the shop, and they said they found a bad connection, which they repaired. Sure enough, 50 miles out on the road, the problem reoccurs.
My Actron is showing that no codes have been set. Referring to my chassis service manual, I would have expected any one of the variety of yaw sensor errors (C1281 through C1288).
Has anyone experienced this before? If so, how was it resolved?
When it occurs, you can feel either the right or left brake being applied momentarily, and the car will witch in one direction or the other. The DIC will flash "Active Handling" as it occurs.
I had the car into the shop, and they said they found a bad connection, which they repaired. Sure enough, 50 miles out on the road, the problem reoccurs.
My Actron is showing that no codes have been set. Referring to my chassis service manual, I would have expected any one of the variety of yaw sensor errors (C1281 through C1288).
Has anyone experienced this before? If so, how was it resolved?
Cecil
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Originally Posted by Snake Slayer
I had the same issue on my 02. Dont walk but run to your dealer the problem is with the Yaw rate sensor. This is very dangerous condition that can cause you to lose control on the car. I am 100 % sure the Yaw rate sensor which control the active handling is bad or malfunctioning.
Cecil
Cecil
that was my sense as well. were you getting error codes however? I suggested this to the dealer on my first trip and they said it was ok, but they may have been just looking at the codes and not actually testing the sensor.
Safety Car
Joined: Sep 2000
Posts: 3,517
Likes: 528
From: Tampa, FL
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by jwg2
that was my sense as well. were you getting error codes however? I suggested this to the dealer on my first trip and they said it was ok, but they may have been just looking at the codes and not actually testing the sensor.
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Originally Posted by Snake Slayer
Yes I did have codes.
heh, I was afraid you were going to say that. Mine has never thrown a code (for all the complaining I did about OBD II, I sure do lean on it now). I took the advice of 2000BSME and adjusted tire pressures, and it did not act up on a very short test run. Who knows, maybe that was it, but I tend not to trust inexpensive solutions on my complicated car
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
sigh. the problem persists.
I've taken the car back to the dealer. they replaced a second, different connector and said I was all set. 5 miles down the road, the same problem again. I think they are helpless/hopeless without an error code.
I'm ready to unload this car and by my C4 back.
I've taken the car back to the dealer. they replaced a second, different connector and said I was all set. 5 miles down the road, the same problem again. I think they are helpless/hopeless without an error code.
I'm ready to unload this car and by my C4 back.
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Originally Posted by jwg2
sigh. the problem persists.
I've taken the car back to the dealer. they replaced a second, different connector and said I was all set. 5 miles down the road, the same problem again. I think they are helpless/hopeless without an error code.
I'm ready to unload this car and by my C4 back.
I've taken the car back to the dealer. they replaced a second, different connector and said I was all set. 5 miles down the road, the same problem again. I think they are helpless/hopeless without an error code.
I'm ready to unload this car and by my C4 back.
Ranger
Thread Starter
Racer
Joined: Aug 2000
Posts: 460
Likes: 12
From: Gulf Shores AL
Originally Posted by Ranger
Which dealer are you using?
Ranger
Ranger
I've used Bob Peck. They don't do a lot of vettes from what I can tell, but they've done a good job thus far. This is the first time I've been unhappy with results. I'm betting Criswell or Koons are more likely to have seen this problem, but I've had extremely unpleasant experiences at both and just as soon not take my business there.
I'd do all the work myself if I didn't have the warranty. When using the dealer requires more effort than noodling through it myself, we have a problem.
Team Owner
Joined: Jun 2004
Posts: 96,209
Likes: 75
From: Houston Texas
St. Jude Donor '09
Originally Posted by jwg2
I'm ready to unload this car and by my C4 back.
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
I'd suggest calling Criswell and asking to speak with Bob Wisman who is the Service shop foreman. Bob also is an accomplished road racer that knows C5s very well. Tell him your symptoms and ask if he thinks Criswell can solve the issue. If he says "yes," believe him.
Ranger
Ranger