Active Handling.. comes on... randomly
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,107
Likes: 7
From: Sandy Ego Ca.
Active Handling.. comes on... randomly
Ok.. I commute in the vette everyday.. and always on the way home, in the evening.. never on the trip to work ... My Active handling indicator will just come on and engage for a second then trip off.
What I can understand is this.. why only in the evening.. nearly always in the same place along my route
Now.. I have recenltly replaced the front pads.... but if they were having problems, something sticking.. w/n they have problems in the morning as well?
*** EDIT ****
Thought Id add more information... all of the above happens at normal freeway speeds 65-70mph...
I happened today while moving at about 40 mph.. ad the good news waa I was on a street vs freeway.. But the road I was on paralleles the freeway and seperated by two miles... this is strange
What I can understand is this.. why only in the evening.. nearly always in the same place along my route
Now.. I have recenltly replaced the front pads.... but if they were having problems, something sticking.. w/n they have problems in the morning as well?
*** EDIT ****
Thought Id add more information... all of the above happens at normal freeway speeds 65-70mph...
I happened today while moving at about 40 mph.. ad the good news waa I was on a street vs freeway.. But the road I was on paralleles the freeway and seperated by two miles... this is strange
Last edited by BitViper; Dec 1, 2009 at 09:44 PM.
Le Mans Master
Joined: Jun 2002
Posts: 9,220
Likes: 17
From: San Diego California
Interesting problem. I wish i was an expert in Active Handling to give you an articulate answer. My first thought would be road conditions and that you are in fact slipping in that general part of your route. But it couldn't be that simple.
Melting Slicks
Joined: Oct 2007
Posts: 2,798
Likes: 8
From: It's true money can't buy happiness, but it is more comfortable crying in a Corvette than on a bicyc
St. Jude Donor '13
I fixed mine by cleaning all the ground connectors under the hood. Once cleaned then I coated all the contacts and ground connectors with dielectric grease. Problem solved.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You need to repair this IMMEDIATELY! It can cause an accident! Recommend that you run in the OFF mode until repairs can be made.
The issue revolves around erroneous signals or error outputs coming from one or more of the sensors that supply the EBTCM information.
The sensors that can cause this are:
Steering Wheel Position Sensor (SWPS)
Lateral Accelerometer
Yaw Accelerometer
Wheel Speed Sensor
EBTCM is bad.
The most common cause of this issue is a bad SWPS. The EBTCM gets input telling it that the car is going XXX direction and the BAD SWAPS is telling it, Hey,,,the driver wants the car to go in the XYX direction.
So, the EBTCM applies the brakes to one or more of the wheels and the car reacts by pulling right or left of you feel pulsations in the braking system.
The easy way to figure this out is to get a GM TECH II and check all the sensors and drive the car and see which sensor is causing the issue.
The EBTCM in my 02 ZO6 was actually BAD and caused the issue. My car had the pulsations and it would also error out at exactly 42 MPH and shut down.
Bill
The issue revolves around erroneous signals or error outputs coming from one or more of the sensors that supply the EBTCM information.
The sensors that can cause this are:
Steering Wheel Position Sensor (SWPS)
Lateral Accelerometer
Yaw Accelerometer
Wheel Speed Sensor
EBTCM is bad.
The most common cause of this issue is a bad SWPS. The EBTCM gets input telling it that the car is going XXX direction and the BAD SWAPS is telling it, Hey,,,the driver wants the car to go in the XYX direction.
So, the EBTCM applies the brakes to one or more of the wheels and the car reacts by pulling right or left of you feel pulsations in the braking system.
The easy way to figure this out is to get a GM TECH II and check all the sensors and drive the car and see which sensor is causing the issue.
The EBTCM in my 02 ZO6 was actually BAD and caused the issue. My car had the pulsations and it would also error out at exactly 42 MPH and shut down.
Bill
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
NO! When the active handling message is on,,,the pump is running and the solenoids in the EBTCM are pulsating to control braking to the correct wheel/s
If you had a dragging caliper, the ACTIVE Handling system wouldn't care "unless it was causing the car to pull to one side or the other during normal driving
If the car moves in a YAW direction and the steering wheel does not correspond to the movement, it will trigger an active handling event.
Thats why the SWPS is normally the cause of the problem. It gives false signals to the EBTCM
BC
If you had a dragging caliper, the ACTIVE Handling system wouldn't care "unless it was causing the car to pull to one side or the other during normal driving
If the car moves in a YAW direction and the steering wheel does not correspond to the movement, it will trigger an active handling event.
Thats why the SWPS is normally the cause of the problem. It gives false signals to the EBTCM
BC
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Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,107
Likes: 7
From: Sandy Ego Ca.
Straight outta the blue... It comes... i get the system engaging.. then it goes away... it happens uphill and down (both slight inclines) and on the flat... and like I said... nearly always along the same strech of road on teh way home... evenning.. Its never happend onteh same commute in the am
Burning Brakes
Joined: Jun 2005
Posts: 782
Likes: 45
From: Toronto Ontario
Straight outta the blue... It comes... i get the system engaging.. then it goes away... it happens uphill and down (both slight inclines) and on the flat... and like I said... nearly always along the same strech of road on teh way home... evenning.. Its never happend onteh same commute in the am
Racer
Joined: Aug 2005
Posts: 465
Likes: 16
I just started having this issue on my '04 Z last night. Driving along at 70MPH active handling lights up and I can feel front brakes kicking in and pulling the car left & right. I have also gotten active handling warming up at times in the past when everything was warm. No codes of any kind. I did have the presence of mind to turn active handling off after the 2nd time it happened.
