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Were about to bleed the rear wheel cylinders--using the 2 person method. the car has power breaks, so DOES THE CAR NEED TO BE RUNNING to do this correctly?

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Nope

Posted on May 19, 2011

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I have 2012 Corolla, brake pedal is goes floor and very low brake also. I have changed Brake vacuum and master cylinder. but the problem still not solve.


You didn't say so I'll ask. Did you bleed the brake lines? Any time you deal with brake fluid replacement you need to do this. Air gets trapped in the system and causes exactly what you are describing.

There are several methods to drain fluid and air from system. I have used both the vacuum method and assistant / friend method. Here is a video on YouTube which shows the methods. You can search for more detailed videos if you want.

Make sure you have the correct fluid for you system, Dot 3 or 4 most likely, and make sure you have plenty of it since you don't want to get half way through and run out. You can always return unopened bottles for refund.

Hope this helps.

Apr 02, 2015 | 2012 Toyota Corolla

1 Answer

1990 jeep wrangler bleeding breaks


Hi there:
I suggest to check this procedure, when the hydraulic brake system must be bled whenever a fluid line has been disconnected because air gets into the system.

A leak in the system may sometimes be indicated by a spongy brake pedal. Air trapped in the system is compressible and does not permit the pressure applied to the brake pedal to be transmitted solidly through the brakes. The system must be absolutely free from air at all times. If the master cylinder has been overhauled or a new cylinder has been installed, bleed the cylinder on a bench before installation. When bleeding brakes, bleed at the wheel most distant from the master cylinder first, the next most distant second, and so on. During the bleeding operation the master cylinder must be kept at least 3 / 4 full of brake fluid.


The ABS bleeding procedure is different from the conventional method. It consists of the following three steps:
Step 1: Conventional manual brake bleed.
Step 2: Bleeding the system using the DRB scan tool.
Step 3: An additional conventional manual brake bleed.

The recommended ABS bleeding procedure is as follows:
  1. To bleed the brakes, first carefully clean all dirt from around the master cylinder filler cap. Remove the filler cap and fill the master cylinder with DOT 3 brake fluid to the lower edge of the filler neck.
  2. Bleed the master cylinder first. Have a helper operate the brake pedal while bleeding each master cylinder fluid outlet line. Do not allow the master cylinder to to run out of fluid,as this will allow additional air to be drawn into the cylinder.
  3. Bleed the brake system in the following sequence:
    1. Master cylinder
    2. HCU valve body (at fluid lines)
    3. Right rear wheel
    4. Left rear wheel
    5. Right front wheel
    6. Left front wheel
  4. Clean off the bleeder connections at all four wheel cylinders. Attach the bleeder hose to the right rear wheel cylinder bleeder screw and place the end of the tube in a glass jar, submerged in brake fluid.
  5. Open the bleeder valve 1/2 - 3/4 of a turn.
  6. Have an assistant depress the brake pedal slowly and allow it to return. Continue this pumping action to force any air out of the system. When bubbles cease to appear at the end of the bleeder hose, close the bleeder valve and remove the hose.
  7. Check the level of fluid in the master cylinder reservoir and replenish as necessary.
  8. After the bleeding operation at each wheel cylinder has been completed, fill the master cylinder reservoir and replace the filler plug.

Do not reuse the fluid which has been removed from the lines through the bleeding process because it contains air bubbles and dirt.


  1. Perform the "Bleed Brake'' procedure with the DRB II scan tool. This procedure is described in the DRB II software information and diagnostic guide.
    1. Attach the DRB II scan tool to the diagnostic connector.
    2. Run the Bleed Brake procedure as described in the DRB II tester guide.
  2. Repeat the conventional bleeding procedure as previously outlined.
  3. Fill the master cylinder reservoir to the proper level.
  4. Check the brake operation.


Hope this helps.

Apr 21, 2013 | Jeep Wrangler Cars & Trucks

2 Answers

1998 Bonneville SSEi brake system cant bleed


this is best way i know is to fill resevoire with fluid open all bleeders up let it start dripping out of them keeping fluid full in resivoire do this until bleeders leaking real good then shut all bleeders put cap on master cylinder crank car check feel of brakes now if pedal still soft then bleed brakes with car not running check again with car running still soft bleed again with car running

Sep 06, 2012 | 1998 Pontiac Bonneville

1 Answer

Brakes are spongy


Did you also bleed the rear brakes? Also try the gravity bleed method working from the right rear wheel, then left rear, right front, then left front. Be SURE to keep the master cylinder full at all times while bleeding.

Jul 25, 2012 | 1998 Volkswagen Golf

1 Answer

I changed a weel cylinder on the drivers side and changed the breaks and the drums got fluide out of the new cylinder but the breaks will not come up when i start up the car


have you bled the brakes after you changed that wheel cylinder? if not, then that's your problem. you need 2 people to bleed the brakes, and start at rear drivers side. then rear passenger side and then drivers front wheel. make sure you have a large container of brake fluid before you start.you will find the bleeder valves on the rear wheel on the inside of rear wheel at the top of wheel, jack it up, use jackstands for safety, crawl under the car and look at the top of wheel for a small bleeder valve. have someone inside the car pump up the brake pedal until they feel the pedal come up with pressure applied.hold pressure on pedal,open bleeder valve on wheel.you will see a small ammount of fluid come out, tighten the valve back and repeat the process again until you see a steadt stream come out. when you see that move to other rear wheel and repeat that process again. after you get that one bled, move to passenger front wheel and repeat that again,remember to tell your helper to keep pressure on brakes until youtighten the bleeders,if not you're wasting time. you helper will have to pump the brakes up on each time and hold pressure on pedal until you have each bleeder tight or else it will **** air into the brake and thats the reason you'll have to bleed them,because when you replaced that wheel cylinder,you let air into the whole braking system. if this doe'nt help,please repost you question on process of bleeding brakes and fixya.com will be happy to assist.

Dec 30, 2010 | 1997 Saturn SL

1 Answer

Need to know location of the bleed valve


bleeder valves are used to extract air from hydraulic systems, such as brake and clutch actuators. The bleeder nut is always located high on the slave cylinder. There is one on each wheel of your car. For disk brakes, it's near the top of the brake caliper. For drum barkes, it's behind the wheel hub.
For a clutch, it's on the top of the transmission at the slave cylinder. To bleed, one person must depress the padal while another person opens and then closes the bleeder. The person in the car pumps up and then holds the pedal down, then tells the other person to open and then close the bleeder. This must be done repeatedly for each line that might have air in it until no air comes out during the bleed cycle. If air got in at the master cylinder, start bleeding at the slave furthest from the master cylinder (right rear) and work your way to the closest (left front). Brake fluid is corrosive, so use a catch pan and clean up afterwards.

Sep 03, 2010 | 2001 Pontiac Sunfire

2 Answers

How do you bleed brakes on 2002 toyota camray. should the car be running


Engine should be off.
Take off one wheel at a time.
Connect a Mity Vacuum pump to the bleed valve.
Start to pump.
The air bubbles can be seen wen the fluid flowing out.
Constantly check the level in the master container to fill in with the new brake fluid so air doesn't get in the master cylinder.
Keep pumping until the clear liquid come out without any air bubbles.
Repeat for all the wheels.c8e6ff4.jpg

Aug 06, 2010 | 2002 Toyota Camry

4 Answers

How to air bleeding in break system by step by


you need two persons
open the bleeder screw on the wheel that is furthest from the master cylinder and do the nearest last.
have a person pump on the brake pedal and hold firm while you open the screw, then close it before tell the person pump again
repeat until you see no more air come out
make sure you fill up the master cylinder, do not let it run out of fluid

Feb 26, 2010 | 1998 Toyota Camry

1 Answer

No brake fluid to the rear wheel cylinders


You'll need to start bleeding the brake system at the Master cylinder to determine where the problem lies.

The lines coming out of the master cylinder will need to be loosened & bled there, initially you can just do the back ones to identify the problem, but once fixed, the system will have to be bled from the Master cylinder first, then the farthest wheel from it, then next farthest, then next, until you do the drivers wheel last.

This method of bleeding the brakes prevents air from crossing from one line to another, causing air to be left in the system.

Back to bleeding the rear brakes first: As someone pumps up the brake pressure, making sure the resivoir stays full, with the cap on between bleeding, and have the person pressing the pedal to do these thngs.
1. Always move the pedal slowly, pressing and releasing.
2. Never release the pressure on the pedal after bleeding a brake, until the line is tightened, then release slowly to prevent air from getting into the fluid.

You should of course get fluid at the master cylinder when you bleed it (or just replace it), then you'll need to bleed the line at the right rear wheel (first) a few times to get fluid if it's been leaking, then the left rear wheel. If you get pressure but no fluid to the rear and the master cyliinder did have pressure released when you bled it, there is either a restriction in the line itself, or the porportioning valve could be damaged. (unusual for the valve to go bad actually, inspect lines for damage such as being pinched if you're getting pressure but no fluid.

Final test if it hasn't been resolved-remove lines at porportioning valve & make sure fluid is leaving/entering there as it should. If you find it defective, a good replacement can come from a salvage yard, or you can buy them new.

Brake fluid on the floorboard under the dash near the brake pedal=bad Master Cylinder.

good luck

Feb 21, 2010 | 1996 GMC Jimmy

2 Answers

Brake bleeding audi 80 1992


right rear, left rear, right front, left front. (left hand drivers side)

Dec 31, 2008 | 1992 Audi 80

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