Question about 2010 Suzuki Grand Vitara

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Abs control module

Master cylinder need hydraulic control unit module

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What is the question?, the above is a statement.?

Posted on May 18, 2013


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What is the correct brake bleeding order for 05 Buick rendezvous?

You need a special tool to bleed the ABS hydraulic control module first, if you have that then you start by bleeding the wheel farthest from the master cylinder, that is the left rear, then the right rear and then the right front and then the left front. The master cylinder must be bench bled before installing and all air purged...

Mar 24, 2017 | Buick Rendezvous Cars & Trucks

1 Answer

I removed my abs system on my 95 gt mustang and now no brakes

You can not remove the ABS hydraulic control module from cars that come with it. Cars without ABS have a device called a proportioning valve. This valve is designed to supply 70% of the stopping power to the front brakes and the remaining 30% to the rear. Without this valve, the rear brakes would constantly be locking up. On cars with ABS, that valve is built into the ABS unit. Your only other option is to obtain and install the master cylinder and proportioning valve from the version of your car that came without ABS. FYI, some cars come with ABS as standard equipment, so there would be no variant without ABS. It's to late for your current ABS unit, however you need to know that you are supposed to flush your brake fluid every two years. Failure to do this causes a build up of moisture in the fluid. Automotive brake fluids absorb moisture from the air. The system is not totally sealed. The cap on the fluid reservoir has a tiny vent hole in it, needed for the fluid to flow into and out of the master cylinder. This is how the moisture gets absorbed. This moisture corrodes the inside of all the hydraulic parts of the system. Brake fluid when new is either clear or the color of ginger ale [pale yellow] as it ages, it darkens. After two years, it starts to turn brown. It will be totally black after 4 to 5 years. Failure to flush the fluid every two years damages your brake's hydraulic system components. Flush the fluid every two years and NONE of the hydraulic components will go bad.

Apr 20, 2014 | 1995 Ford Mustang

2 Answers

Troubleshoot master cylinder on 1999 kia sportage

This is not a master cylinder problem, it an ABS hydraulic control sticking, the ABS in this is what we call "Active ABS", this means it can provide brake activation with bo driver pedal input. 1st have the system scanned for fault codes, if none are found I would be suspect of the ABS unit.

Jan 27, 2012 | 1999 Kia Sportage

2 Answers

Abs light and brake come on and pedal goes to the floor easily could not find any leaks

you could have a master cylinder leaking that won`t always show an external may also have an internal abs hydraulic module leak,you can check the master cylinder by having someone push on the pedal and cracking the lines loose and the fluid should spray out under alot of force,if not then the seals internal of the master are not doing their job.also by unbolting it from the brake booster and pulling it away from the booster and look at the rear of the unit to see if it is damp or wet if it is then it should be don`t have to remove the brake lines to check this.if the master checks out good then i would say you have a bad abs module.

Mar 17, 2011 | 1998 Dodge Ram 1500 4WD

4 Answers

I have the same problem with my 2000 v70 glt a not only does the break, abs, and check engine lights come on and the speedometer and odometer don't work but the arrow starts flashing and the vehicle seems...

The most common problem is with the ABS control unit. You will most likely have to replace it. It is located under the brake hydraulic unit (not the master cylinder). This part can be purchaced from a Volvo dealer, or sent to one of the many places that repair them. If you choose to fix it yourself, and would like the name of one of the companys that repair them, let me know.

Nov 23, 2010 | 1999 Volvo V70

1 Answer

How to trouble shoot the brake system?

To trouble shoot the brake system you have to check:AntiLock Brake System ABS:
Hydraulic Modulator
Basically this unit holds steady or bleeds off pressure in brake line, as necessary, when the Electronic Brake Control Module (EBCM) detects an abnormal deceleration in the speed of the wheel. On 2000 and later models the EBCM and Brake Pressure Modulator Valve (BPMV) are mounted on a bracket attached on the left strut tower.
Wheel Speed Sensors, brake fluid level, brake hoses and lines, inspect and replacement, Brake hydraulic system-bleeding, Brake light switch, check, adjustment and replacement.
Disk brake caliper, disk brake pads, drum brake shoes, master cylinder, master cylinder reservoir, O-rings replacement, parking brake adjustment, parking brake cables inspect and replacement, parking brake shoes-replacement, power brake booster, check or replacement, wheel cylinder inspect and replace.

Oct 10, 2010 | 2000 Chevrolet Venture

2 Answers

I replaced the brake master cylinder on my 91 Lincoln Mark 7 with a non high pressure master cylinder and the rear brakes do not hold. Do I need to change the cal. on the rear also?

ANTI-LOCK BRAKE SYSTEM (and HCU-Hydraulic Control Unit)
General Information The 4-Wheel Anti-lock Brake System (ABS) is an electronically operated, all wheel brake control system. Major components include the power brake booster, master cylinder, the wheel speed sensors, and the Hydraulic Control Unit (HCU) which contains the control module, a relay, and the pressure control valves. The system is designed to ****** wheel lockup during periods of high wheel slip when braking. Retarding wheel lockup is accomplished by modulating fluid pressure to the wheel brake units. When the control module detects a variation in voltage across the wheel speed sensors, the ABS is activated. The control module opens and closes various valves located inside the HCU. These valves, called dump and isolation valves, modulate the hydraulic pressure to the wheels by applying and venting the pressure to the brake fluid circuits. Some models are equipped with a Traction Assist (TA) system. The TA system senses wheel spin upon acceleration, turns on the Hydraulic Control Unit (HCU) pump and applies fluid pressure to the appropriate rear wheel. Two additional isolation valves in the HCU will also close to permit fluid to flow only to the rear wheels. The TA system monitors TA usage to avoid overheating the rear brakes. If the system does sense brake overheating, the ABS module will inhibit TA operation until the rear brakes are permitted to cool down.
SYSTEM COMPONENTS The anti-lock brake system consists of the following components:
  • Vacuum booster and master cylinder assembly
  • Hydraulic Control Unit (HCU)
  • ABS module
  • Wheel sensors
  • Pedal travel switch
On 1992-1994 and 1995-00 a scanner is used to perform the brake bleed. But on yours, I think it's different according to the manual.
What do you mean change the cal. on the rear also? Do you mean Caliper?

Jul 26, 2010 | 1991 Lincoln Mark VII

1 Answer

ABS light stays on sounds like a abs pump is staying on. Is there a pump for the abs system?

There is no seperate pump. The following lines will give you more details

Braking force and the tendency of the wheels to lock up are affected by a combination of factors such as the friction coefficient of the road surface, and the difference between the vehicle speed and the road wheel speed. The ABS prevents the road wheels from locking up during heavy braking by controlling the vehicle's brake system hydraulic pressure.
During normal braking, as the rotational speed of the wheel falls, no electric current flows from the ECU to the hydraulic unit. The solenoid valve is not energized. The brake master cylinder hydraulic pressure is applied to the brake unit, and the ABS is not involved. However, even though the ABS is passive during normal braking, its control module is constantly monitoring for rapid deceleration of any of the wheels.
If a wheel-speed sensor signals severe wheel deceleration - which means the wheel is likely to lock up - the ECU sends a current to the hydraulic unit. This energizes the solenoid valve. The action of the valve isolates the brake circuit from the master cylinder. This stops the braking pressure at that wheel from rising, and keeps it constant.
If the sensors signal the wheel is still decelerating too rapidly, the ECU sends a larger current to the hydraulic unit. The armature moves even further and opens the valve. It opens a passage from the brake circuit. Brake fluid is sent from the brake circuit back to the master cylinder. Pressure in the brake caliper circuit is reduced so that the wheel is braked less heavily.
If the wheel sensors indicate that lowering the brake pressure is letting the wheel accelerate again, the ECU stops sending current to the hydraulic unit and de-energizes the solenoid valve. This lets the pressure increase, so that the wheel is again decelerated.
This cycle repeats itself about four to six times per second.
It is normal in an ABS for the valves in the hydraulic control unit to keep changing position as they change the brake pressure that’s being applied. These changes in position may cause rapid pulsations to be felt through the brake pedal.

Jun 06, 2010 | 2003 Chevrolet Silverado 1500

2 Answers

Where is the ABS control module located on a dodge caravan

Below the Brake Master Cylinder and slightly back towards the Fire Wall. Should have multiple brake lines running into it.
Hint: Most people want to replace these. Alot of times the connections are merely corroded or have build up on the conductors or in the conductor "pits". Clean both and check before going to the expense of replacing. I did and it worked and saved me $$ not having to replace.

Nov 19, 2009 | 2001 Dodge Grand Caravan

1 Answer

Where is the ABS modulator on my 1995 Accord. If under the hood what does it look like?

There will be a unit on the opposite side of the firewall of your master cylinder with hydraulic lines coming to it from the master cylinder. That is the modulator.

i hope this helps,

Oct 23, 2009 | 1995 Honda Accord

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