Crashes caused by EBCM failure?
Cruising
Joined: Jan 2014
Posts: 13
Likes: 0
Abs/tcs/ah
The ABS/TCS/AH are tied together somewhat in that if the EBCM has an issue, all three advanced safety features will be disabled. EBCM issues can be caused by all sorts of problems, wheel sensors, poor or corroded grounds, defective circuit boards, low voltage issues, etc...
Being that the car was having some sort of issue indicated by the warning lights, it would just disable those three features and it would be like driving a car without advanced safety features, but it would not cause an accident.
Being that the car was having some sort of issue indicated by the warning lights, it would just disable those three features and it would be like driving a car without advanced safety features, but it would not cause an accident.
I think you guys are mixing ABS with AH/TC. They are not the same.
ABS is antilock braking system. It has to do with only you pressing the brake pedal and any wheel locking up. It pulses the pressure to the locked wheel to allow it to turn and not skid. This system is totally independant of the others.
Traction control closes the throttle when the wheels spin.
Active Handling can apply the brakes to any wheel at any time that the computer deems necessary to keep the car going in the intended direction based on many different inputs. It just happens that it uses the abs sensors in the wheels to measure whether any of the wheels are spinning or sliding.
Lets say you turn left really hard and the front end slides....The car knows how many G's you are pulling and knows what the steering angle is and should be, and knows which wheel is spinning faster than the others. So it decides to drag the left rear wheel brakes to make you turn better. Kinda like turning brakes on a sandrail. Etc, etc.
As far as this accident, who knows. He is lucky to be alive whether it was his fault or the cars fault.
ABS is antilock braking system. It has to do with only you pressing the brake pedal and any wheel locking up. It pulses the pressure to the locked wheel to allow it to turn and not skid. This system is totally independant of the others.
Traction control closes the throttle when the wheels spin.
Active Handling can apply the brakes to any wheel at any time that the computer deems necessary to keep the car going in the intended direction based on many different inputs. It just happens that it uses the abs sensors in the wheels to measure whether any of the wheels are spinning or sliding.
Lets say you turn left really hard and the front end slides....The car knows how many G's you are pulling and knows what the steering angle is and should be, and knows which wheel is spinning faster than the others. So it decides to drag the left rear wheel brakes to make you turn better. Kinda like turning brakes on a sandrail. Etc, etc.
As far as this accident, who knows. He is lucky to be alive whether it was his fault or the cars fault.
Melting Slicks
Joined: Nov 2004
Posts: 2,275
Likes: 6
From: Lake Oswego, Near Portland Oregon
We would all be better served with these aid systems completely removed from the vehicles. Now I see the idiot politicians have passed into law a requirement that new cars made on or after 2020 will have to have automatic braking, so you can go to sleep and not run into the rear end of the car in front of you. Long about 2026 when these things start to fail, the roads will become like a carnival ride of 'Dodge-Em" ...and I don't mean the brand of Chrysler.
Racer
Joined: Jan 2016
Posts: 479
Likes: 44
From: Northern Colorado
Well, I'm a new owner and this thread scared the daylights out of me. However I do have a receipt for 4100 bucks the previous owner paid for new brakes, EBCM etc. AND it looks like (I thought I read on this novel that A/H was standard on 99) but according to forum research- I do not have it.. (I do show JL9)
If you don't have the JL4 code, you don't have active handling according to the Corvette Action Center site for 98 thru 2000 models, it became standard in 2001:
"Active Handling enhances the accident avoidance capabilities of the already nimble Corvette. It will be offered as an option (JL4) on all 1998-1/2 Corvette models. Additionally, it will be a required option on replicas of the '98 Corvette convertible Indy 500 Pace Car"
"The Active Handling System, RPO JL4, debuted on the 1998 Corvette and became standard equipment on the 2001 model."
If you don't have the JL4 code, you don't have active handling according to the Corvette Action Center site for 98 thru 2000 models, it became standard in 2001:
"Active Handling enhances the accident avoidance capabilities of the already nimble Corvette. It will be offered as an option (JL4) on all 1998-1/2 Corvette models. Additionally, it will be a required option on replicas of the '98 Corvette convertible Indy 500 Pace Car"
"The Active Handling System, RPO JL4, debuted on the 1998 Corvette and became standard equipment on the 2001 model."
Intermediate
Joined: Mar 2016
Posts: 27
Likes: 1
From: Edmonton Alberta
Perhaps he grabbed a lower gear by mistake on acceleration... and...but isn't there a system in the active handling to stop the wheels from spinning under power as well? how does that work to limit power to the wheels... brakes or, just dumps the re"0"stat throttle till no more spin?
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 160
From: Lafayette Louisiana
I have had two EBCM s failed. When they failed, diagnostics reported "TCS No Comm." With that had no Traction Control, No Anti-Lock Brakes and no Active Handling. So I figure if I had crashed during those times it could have only been blamed on my driving.
I do have a related failure that's aggravating and maybe slightly dangerous. Steering wheel position sensor is flaky and sometimes tells EBCM I'm doing something crazy when going straight down the road. I've felt it cut power, apply braking and disengage cruise control. That seems more dangerous than completely failed EBCM. But still I know that sensor is failing. I can either remember to turn it off (press the Active Handling Button) or get it fixed.
I do have a related failure that's aggravating and maybe slightly dangerous. Steering wheel position sensor is flaky and sometimes tells EBCM I'm doing something crazy when going straight down the road. I've felt it cut power, apply braking and disengage cruise control. That seems more dangerous than completely failed EBCM. But still I know that sensor is failing. I can either remember to turn it off (press the Active Handling Button) or get it fixed.
