Active Handling
Thread Starter
7th Gear
Joined: Sep 2011
Posts: 7
Likes: 0
Active Handling
When driving our 2002 Corvette yesterday, we had a couple of anomolies.
First, when driving with the Cruise Control on for several miles, all of a sudden the Cruise Control disengaged.
Second while driving, the car shifted hard to the right and released. After this, the DIC display stated Active Handling On. This shift happened a couple more times, though not as severe as the first. And the Active Handling On Display happened repeatedly throughout the ride for over an hour.
I believe these first two items are related, as I think that when the Active Handling engages, the Cruise Control may disengage. But this is just my opinion.
On a separate note, while this was happening, the headlights would dim at times while on low beam. The dimming would happen at times when the Active Handling On display came up, as well as when it didn't. I don't know if this last item is related or not.
Shut off the car, and restarted.
Turned off Active Handling with the push button near the arm rest. And turned back on.
Recent repairs that have happened, the front left headlight that is hidden when off would no longer come up. This was repaired.
First, when driving with the Cruise Control on for several miles, all of a sudden the Cruise Control disengaged.
Second while driving, the car shifted hard to the right and released. After this, the DIC display stated Active Handling On. This shift happened a couple more times, though not as severe as the first. And the Active Handling On Display happened repeatedly throughout the ride for over an hour.
I believe these first two items are related, as I think that when the Active Handling engages, the Cruise Control may disengage. But this is just my opinion.
On a separate note, while this was happening, the headlights would dim at times while on low beam. The dimming would happen at times when the Active Handling On display came up, as well as when it didn't. I don't know if this last item is related or not.
Shut off the car, and restarted.
Turned off Active Handling with the push button near the arm rest. And turned back on.
Recent repairs that have happened, the front left headlight that is hidden when off would no longer come up. This was repaired.
Tech Contributor
Joined: Oct 1999
Posts: 41,036
Likes: 9,798
From: Charlotte, NC (formerly Endicott, NY)
I believe these first two items are related, as I think that when the Active Handling engages, the Cruise Control may disengage. But this is just my opinion.
On a separate note, while this was happening, the headlights would dim at times while on low beam. The dimming would happen at times when the Active Handling On display came up, as well as when it didn't. I don't know if this last item is related or not.
Shut off the car, and restarted.
Dimming while Active Handling is active can be due to the pump motor running in the Brake Pressure Modulator Valve. Active Handling uses the pump to apply brake pressure to selected wheels to yaw the car.
As mentioned above use the DIC to read the codes. I suspect you may not find any since you don't have a Service Active Handling message. You probably have an element that is close to failing that is sending slightly faulty signals to the EBCM which the EBCM then reacts to. These signals are probably just outside the normal parameters but not far enough out to trigger a code which would shut down the system. The EBCM itself could have an issue as well. The steering wheel position sensor is the most likely culprit.
Bill
Thread Starter
7th Gear
Joined: Sep 2011
Posts: 7
Likes: 0
Reading of codes
Checked my codes and found a few. Most were of the "H" variety. One section reported seven codes but went to fast for me to write. In manual mode it did not present the individual codes.
I reset everything and drove car 30 miles and checked DIC and found no codes at all.
Is there a way to look at individual codes slowly?
With a lot of reasearch I found a safety recall for 05/06 autos, and it reads the exact problem I experienced. The recommended mech in Bowling Green said he cleaned all sensors. ( I would have thought to clean all grounds)???
Thanks in advance
I reset everything and drove car 30 miles and checked DIC and found no codes at all.
Is there a way to look at individual codes slowly?
With a lot of reasearch I found a safety recall for 05/06 autos, and it reads the exact problem I experienced. The recommended mech in Bowling Green said he cleaned all sensors. ( I would have thought to clean all grounds)???
Thanks in advance
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Hopefully you wrote down the codes before you cleared them. No codes now, you'll have to wait till the next time it fails, then pull the codes and yes, you can pull them while driving but its best to pull over and write them down.
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From: Bowie Texas
Racer
Joined: May 2009
Posts: 279
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From: Cincinnati OH
I'm with the steering sensor crowd, the active handling system is receiving a faulty input from the sensor tricking it into thinking an excessive steering manuever has occured. The system then reacts by reducing the engine power and activating certain brake calipers to help the driver maintain control. The extra electric current being used by the braking system pump is causing the headlights to dim.
Last edited by lespaulr0cker; Sep 21, 2011 at 12:30 AM.