ABS Activating at Low Speeds Options

[Rofomet]

It's been a problem that has been progressively getting worse. A year ago, my ABS would randomly go off while braking. Last week, the ABS would kick in randomly more and more often. I checked my fluids and it's topped off at MAX. I checked each sensor to see if there was gunk on it or something. Turns out out the front two sensors were covered with gunk. Cleaned it up and put it back in. Now ABS kicks in under 10mph consistently. So I'm asking, whats the problem? I'm pretty sure I put the sensors back in correctly.

[azian_advanced]

does your ABS light stay lit on the gauge cluster?

[Batman722]

check the codes.

94-95
ignition in the ON position,
bridge E1 & TC in the diagnostics box, just like checking codes, read the code from the ABS light


Code 11
Open in solenoid relay circuit. Check actuator wiring
harness, solenoid relay, solenoid relay wiring harness and solenoid
relay connector.

Code 12
Short in solenoid relay circuit. Check actuator wiring
harness, solenoid relay, solenoid relay wiring harness and solenoid
relay connector.

Code 13
Open in pump motor relay circuit. Check actuator wiring
harness, pump motor relay, pump motor relay wiring harness and pump
motor relay connector.

Code 14
Short in pump motor relay circuit. Check actuator wiring
harness, pump motor relay, pump motor relay wiring harness and pump
motor relay connector.

Code 21
Open or short circuit in solenoid for right front wheel.
Check actuator solenoid, wiring harness and connector.

Code 22
Open or short circuit in solenoid for left front wheel. Check
actuator solenoid, wiring harness and connector.

Code 23
Open or short circuit in solenoid for right rear wheel. Check
actuator solenoid, wiring harness and connector.

Code 24
Open or short circuit in solenoid for left rear wheel. Check
actuator solenoid, wiring harness and connector.

Code 31
Malfunction of right front wheel speed sensor signal. Check
speed sensor, sensor rotor, wiring harness and connector.

Code 32
Malfunction of left front wheel speed sensor signal. Check
speed sensor, sensor rotor, wiring harness and connector.

Code 33
Malfunction of right rear wheel speed sensor signal. Check
speed sensor, sensor rotor, wiring harness and connector.

Code 34
Malfunction of left rear wheel speed sensor signal. Check
speed sensor, sensor rotor, wiring harness, and connector.

Code 35
Open in left front or right rear wheel speed sensor circuit.
Check speed sensor, sensor rotor, wiring harness and connector.

Code 36
Open in right front or left rear wheel speed sensor circuit.
Check speed sensor, sensor rotor, wiring harness and connector.

Code 37
Rear speed sensor rotor malfunction. Check rear sensor
rotors.

Code 41
Battery voltage is less than 9.5 volts or more than 16.2
volts. Check battery and voltage regulator.

Code 51
Actuator pump motor is locked or pump motor circuit open.
Check pump motor, pump motor relay, vehicle battery, actuator wiring
harness, connectors, actuator pump motor circuit and actuator ground
bolt.

ABS Light Always On
Malfunction of ABS ECU. Inspect ABS ECU connector for proper
installation and undamaged terminals. Repair as necessary. If
connector is okay, temporarily substitute known good ABS ECU. Retest
system.

[Rofomet]

ABS light used to stay on after it would randomly go off before I cleaned the sensors. ABS lights don't go off anymore now after it activates below 10mph.

I'll check codes when it's daytime again.

[hurley97]

Check the ABS speed rings around the axles, they are the part that look like gear teeth at the end of the axle where it goes into the hub. If you pull the sensor out you may be able to see a little of it through the hole, just have to turn the axle to check the whole ring. Might be easier to just pull the end of the axle out of the hub and look at the ring gear, if there are teeth broken off it could cause the ABS to think it needs to be engaged. Of course this is only if all your sensors are working properly, i.e. no ABS codes in the system.

This post has been edited by hurley97: Feb 3, 2010 - 8:55 PM