CoolblueGTP2000
New member
why isn't my (ABS) or traction control not turning off on 00 pontiac gtp
abs stays on
- Thread starter CoolblueGTP2000
- Start date
johannib
New member
The PCM on your car does not control the ABS light. The EBCM/EBTCM ( Electronic Brake Control Module/Electronic Brake Traction Control Module) Controls the ABS Light. Loss of power to the EBCM/EBTCM drops the KAM ( Keep Alive Memory ) to the EBCM/EBTCM.( No KAM = no codes) So disconect your Battery for 10 seconds.
BUT
The light is going to come right back on untill the fault is corrected. Every time you start your car the EBCM/EBTCM does a selftest. If it detects a problem the light comes on and will stay on untill the problem is no longer detected.
The EBCM does a solenoid test once you start moving. exceeding 10 mph for more than 3 seconds starts the test every ignition cycle.(every time you start the car)
If you start your car and the ABS light comes on you can rule out Wheel speed sensors(HUB assembly)and Jumper harness to the wheel speed sensors. EBCM/EBTCM can only detect a fault with those while moving.Wheel speed sensors are AC voltage generators.They generate a small AC voltage as they rotate (like your altenator generates voltage while turning).Voltage is what the EBCM/EBTCM is looking for.
Start the car with your foot OFF the brake pedal....is the light on? NO. Press the brake pedal if the light comes on you will need a brake light switch.( EBCM/EBTCM get two signals from the brake switch one is direct the other is from the BCM(body control module)). If it get one signal and not the other the ABS light illuminates.
If the ABS light come on when you start the car without your foot on the brake, you have a problem with the EBCM/EBTCM.
BUT
The light is going to come right back on untill the fault is corrected. Every time you start your car the EBCM/EBTCM does a selftest. If it detects a problem the light comes on and will stay on untill the problem is no longer detected.
The EBCM does a solenoid test once you start moving. exceeding 10 mph for more than 3 seconds starts the test every ignition cycle.(every time you start the car)
If you start your car and the ABS light comes on you can rule out Wheel speed sensors(HUB assembly)and Jumper harness to the wheel speed sensors. EBCM/EBTCM can only detect a fault with those while moving.Wheel speed sensors are AC voltage generators.They generate a small AC voltage as they rotate (like your altenator generates voltage while turning).Voltage is what the EBCM/EBTCM is looking for.
Start the car with your foot OFF the brake pedal....is the light on? NO. Press the brake pedal if the light comes on you will need a brake light switch.( EBCM/EBTCM get two signals from the brake switch one is direct the other is from the BCM(body control module)). If it get one signal and not the other the ABS light illuminates.
If the ABS light come on when you start the car without your foot on the brake, you have a problem with the EBCM/EBTCM.
@johannib, Just wanted to say thank you sir for the most invaluable information you posted here. Very helpful indeed!
Don't wish to hijack this thread but I have an ongoing thread with a ABS issue too in case anyone is interested.
http://www.grandprixforums.net/flashing-abs-tcs-light-72820.html
Don't wish to hijack this thread but I have an ongoing thread with a ABS issue too in case anyone is interested.
http://www.grandprixforums.net/flashing-abs-tcs-light-72820.html
I have a similar situation... The ABS light on my 01 GP/GT 3800 is lite all the time and makes no difference if the Remote Start is used or not. Also along with the ABS light my Trac Off light is lite and I can not engage the Trac Control... Had the codes read this afternoon and nothing is coming up.
spazzz
New member
Check out this thread started by GPF Master Guru Brandon2000!!....its all about the problems and the repair which should fix you up.
http://www.grandprixforums.net/ebcm...acement-abs-light-tcs-off-solution-50176.html