Question about Toyota RAV4

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HI, I OWN A 2004 RAV4 D4D AND THE BRAKES ARE JUST NOT WORKING FULLY, THE PEDAL IS NEARLY GOING INTO THE FLOOR BEFORE THEY START TO WORK, IT SEEMS THEY ARE NOT HOLDING THE PRESSURE WHEN YOU PUMP THEM, THE PADS ON THEM ARE JUST HALF WORE, THE HANDBRAKE IS GOOD, THE FLUID LEVEL IS DOWN A BIT BUT DOENT SEEM TO BE LEAKING ANYWHERE, IS THERE A SOLUTION TO FIX THIS PROBLEM. CHEERS! ANDY.

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  • mandy_pat242 Sep 30, 2010

    HI. I OWN A 2004 RAV4 D4D AND THE BRAKES ARE NOT WORKING PROPERLY, WHEN I PRESS THEM IN THE PEDAL IS NEARLY GOING INTO THE FLOOR, THE PADS ARE JUST HALF WORN, THE FLUID LEVEL SEEMS TO BE DOWN A BIT. BUT THERE IS NO LEAKS IN THE LINE OR AROUND THE MASTER CYLINDER. IS THERE A SOLUTION TO THIS PROBLEM.

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  • Master
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Sounds like you have air in the line that need to be bled out as long as pads have plenty life left.

Posted on Sep 30, 2010

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  • Master
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It could be a vacuum problem to the brake booster or a faulty Master Cylinder. That the main vacuum line to the brake booster for cracks and leaks. Check the fluid level and make sure it is full. If this does not resolve the issue, bleed the brake lines to make sure you don't have air in the lines and inspect all 4 calipers to make sure your not losing fluid at the calipers. The emergency brake working really is no indicator since that is typically a direct cable activation that by passes the the brake booster system. If all of this does not turn up a problem and the brakes are still faulty check for caliper operation, make sure they are actually functioning properly. If they are functioning correctly replace the master cylinder, bleed the lines and top off with fluid.

Posted on Sep 30, 2010

  • James Young Sep 30, 2010

    If you have followed you the steps I outlined and there is no obvious leaks of fluid or vacuum leaks then the problem is the master cylinder. There are only so many areas that can cause the problem you are having. The Hand brake working is not an isolating issue since the hand brake operates on a different principle than the rest of the braking system. Since you mentioned the fluid was low it is possible that air got into the braking system and you will need to bleed the brake lines to get that out. The master Cylinder and Brake Booster are the same assembly. The fluid reservoir is attached to the master cylinder on your firewall drivers side and if the cylinder is malfunctioning or there is a vacuum leak on that line the brakes will do what you have described. The troubleshooting steps I am giving you come from the manual on the vehicle. There are several potential failure points in the brake system and in order to repair your problem we will have to go through them to isolate it to one problem so you can fix that problem without investing $200 in calipers and brake lines.

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