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All antilock brake systems control tire slip by monitoring the relative deceleration rates of the wheels during braking. If one wheel starts to slow at a faster rate than the others, or at a faster rate than that which is programmed into the antilock control module, it indicates the wheel is starting to slip and is in danger of breaking traction and locking up. The ABS system responds by momentarily reducing hydraulic pressure to the brake on the affected wheel or wheels. Electrically operated solenoid valves are used to hold, release and reapply hydraulic pressure to the brakes. This produces a pulsating effect, which can usually be felt in the brake pedal during hard braking. You may also hear a buzzing or chattering noise from the ABS hydraulic unit. The rapid modulation of brake pressure in the brake circuit reduces the braking load on the slipping wheel and allows it to regain traction, thus preventing lockup. It is the same as pumping the brakes, except that the ABS system does it automatically for each brake circuit, and at speeds that would be humanly impossible, up to dozens of times per second depending on the system (some are faster than others). Once the rate of deceleration for the affected wheel comes back in line with the others, normal braking function and pressure resume, and antilock reverts to a passive mode.
Darian Altenwerth
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1993 Chevy corsica which the abs modulator valve was replaced now the abs unit just clicks and will not work how do you reinstall the abs motor pack to the abs modulator valve?
thats easy you just ....... get a life thats easy you just ....... get a life
How to find abs relay 1996 s10 pickup?
The ABS pump motor relay is not serviceable. It is part of the ABS modulator valve.
What abs component receives input signals and determines hydraulic modulator action?
The ABS Control Module.
What could be the cause when a Honda civic abs light stays on?
HAVE A MECHANIC SCAN YOUR ABS SYSTEM THROUGH THE ECM. IT IS MOST LIKELY A FAULTY WHEEL SPEED SENSOR OR MAY BE THE ABS HYDRAULIC MODULATOR ITSELF. HAVE A MECHANIC SCAN YOUR ABS SYSTEM THROUGH THE ECM. IT IS MOST LIKELY A FAULTY WHEEL SPEED SENSOR OR MAY BE THE ABS HYDRAULIC MODULATOR ITSELF.
How do you turn off the ABS light on 1994 Nissan 300zx?
Take the fuse out or just unhook it from the modulator.
ABS and handbrake light stay on permanently. Is this a damaged ECU or what?
My dealer says the ABS modulator is bad. He is ordering this $1100 part and it should fix the problems. Fortunately it is under warrenty. Without the fix, the ABS will not work.
Which ABS can have up to 2700 psi abailbale at the wheels even when the engine is off?
An ABS hydraulic modulator systems can contain over 2700 psi. the accumulator must be depressurized.
Where is the front wheel modulator located on a 1995 S-10 Blazer?
Never heard of a "front wheel modulator" on a S-10 Blazer. If you mean hub, it is the wheel bearing assembly. If you meant 4x4 shift solenoid then depends if it is shift on the fly or not. The ABS has a modulator, but not sure what you mean.
What would cause brake fluid to transfer from the master cylinder to the ABS during normal use On a 1989 Acura Legend?
the abs modulator has a proportioning valve inside for normal braking.its an internal leak
What would cause the abs light on the dash to stay on all the time on a 1999 ford f150?
The ABS computer has detected a fault in the Antilock Braking System. Often it is a wheel speed detector or a modulator.
2000 GMC truck JH-H ABS light on is there a brake failure?
Was a recall for wheel sensors-abs modulator common Mounted on frame, and difficult to change due to brake line removal. read ecm- get codes.
What is a diode modulator?
A diode modulator is a type of AM modulator constructed using diodes. One type of diode modulator is the ring modulator shown in the image.
