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ABS kicking in at low speed 2000 Chevy Astro Van AWD

Tiny
JKI
  • MEMBER
  • 2000 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 61,000 MILES
Have put on new brake pads and rotors, and a new Hydro Booster, also new tires and alignment. Still doing.
Monday, June 13th, 2011 AT 3:40 PM

5 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
For the ABS to kick in at low speed, the most likely causes are the sensors or control unit. You would need appropriate scan tools to monitor and diagnose the problem.

Have you tried to check for trouble codes?
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Monday, June 13th, 2011 AT 4:04 PM
Tiny
JKI
  • MEMBER
  • 3 POSTS
I was told they checked the sensors when I had new brakes, rotors, tires, alignment and Hydro Booster installed.
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Monday, June 13th, 2011 AT 6:30 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Sensors could be good but if the sensing gears are dirty/covered with dirt, it can result in improper readings and cause the ABS to activate.
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Monday, June 13th, 2011 AT 8:33 PM
Tiny
JKI
  • MEMBER
  • 3 POSTS
What are the sensing gears? Where are they located?
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Tuesday, June 14th, 2011 AT 1:45 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
They are located on the axle shaft and wheel hubs, behind the rotors/ brake drums. They are for telling the wheel sensors that the wheel is turning or stopped.
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Tuesday, June 14th, 2011 AT 5:46 PM

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