Question about Lexus IS 300

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Abs, brake won't go off, fluid full, just changed rear rotors and pads and rear brake line. also, trac light flashes on and off. how do i reset this now that it is fixed? car is a 2002 lexus is300

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The ABS system and TRAC system are very similar. Signals from the speed sensors in the wheel hubs and one on the output shaft of the transmission are checked against each other. If when you apply the brake a wheel is detected as running much slower than the others brake fluid is relieved from this wheel to stop it skidding. Likewise when you accelerate the speed sensors detect a wheel speeding up faster than the rest and the brake is applied to it to gain traction control. So you can see that the speed sensor operation and their signals are central to both ABS and TRAC. If you have a problem with one then you invariably have a problem with the other. You need to check that the speed sensors to the wheel hubs are intact, that the connections are good and that the wiring has continuity. Also check the speed sensor on the side of the output shaft on the transmission casing, the connection and continuity. If any part is loose this will be enough to upset the complete system.

Posted on Mar 22, 2011

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run a fault code reader to reset the abs and trac lights as the trac light uses the same sensor as the abs.. IF the pedal is still soft then there is still air in the brake system. You may have to crack the lines at the master cylinder first and bleed there first then start at the longest line and work back to the shortest

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How do you reset ABS sytem for 2005 mazda tribute rear brakes


There is a split valve on the rear brakes ensuring the correct amount of pressure build up compared to the front ones. Check the fluid is pumping through correctly.
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2006 HYUNDAI Sonata I figured I'd bleed the the rear brakes after replacing the rotors and pads. 120,000 Miles with no previous brake issues besides normal replacement of front rotors and pads. After...


Try re-bleeding ALL wheels starting with furthest away - pass rear, then driv rear, then pass front and driv front. That should get your pedal back. To reset light you need ABS reset tool and it's EXPENSIVE. Have a good competent shop reset it for you. Body shops can reset them also.

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ABS light and Trac Cont light stay on....


Check your rear brakes and inside the rear Rotors. There are ABS scanners and if Autozone or Oreillys have that type of scanner, they will scan for free.

Because the Trac Control is on the Rear axle all of your problems are probably rearward. What usually happens is the Emergency brake material and the Rotor pads wear down and blind the sensors. Sometimes the Trac Control will destroy the brake linings. The Trac Control works by applying the rear brake to the fastest spinning wheel in an effort to match each rear wheels speed.

When the sensors have debris flying in front of them, they miscount and include the debris in figuring RPM. Someone needs to disassemble and inspect the back brakes.

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I put the car in gear this morning and the abs service vehicle and trac off light came on and won't go off I also fixed a small leak on the tranny


CHECK TO SEE IF YOU HAVE TRANSMISSION FLUID ON FRONT BRAKE ROTOR OR BRAKE PADS.IF BRAKES CONTAMINATED THE TRAC LIGHT AND ABS LIGHT WILL COME ON.IF ALL LOOKS GOOD LET DEALERSHIP CHECK OUT THE ABS BRAKES AND TRAC SYSTEM.THEY HAVE TO USE DIAGNOSTIC EQUIPMENT TO FIX THE PROBLEM.

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Driver side brake not bleeding properly after bleeding left side and changing rotors, calipers, and pads?


first of all make sure master cylinder is full of brake fluid.then you crank car leave foot off brake pedal. watch abs light on dash it should turn off in 10 seconds if not have car towed to garage or dealer. they have to use a scanner to scan the abs brakes if abs light turn off in 3 seconds. then starting bleeding from master bleed the lower brake line fitting at the proportional valve followed by the upper brake line fitting. keep eye on brake fluid in mastercylinder dont let run dry.next prime the abs hydralic modulator.connect the bleeder hose to the rear bleeder valve on the modulator.place the other end into a container partially filled with cleab brake fluid.make sure the end of the hose is submerged.open the bleeder valve slowly about 1/2 to 3/4 turn have an assistant depress the brake pedal and hold it in the depressed position. when the flow of fluid ceases close the bleeder valve.repeat process until no air bubbles are present in the fluid.then tighten the bleed valve securely. start bleeding brakes. your bleeding sequence is right rear - left front - left rear - right front.WARNING IF ALL FAILS YOUR BRAKES DONT FEEL SOLID AND FEEL VERY SPONGY.DONT DRIVE CAR. HAVE IT TOWED TO DEALERSHIP.THEY WILL HAVE TO PRESSURE BLEED YOUR BRAKE SYSTEM.

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Go back around and check to make sure you didnt accidentally pinch or cut a brake pad sensor. Also the ABS modules on VAG cars are pretty crappy.

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Sounds like you have loose brake pad linings.
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Check your emergency brake pads. They can fall apart inside the drum/rotor combo on the rear. That is where your sensor is for the ABS.

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make sure that the abs connect for that side is connect properly and the right amount of brake fluid is there

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Chevy Cavalier 2001 ABS Brake problem


You don't say what brakes.

I have had many cavys and worked on them. Great cars.

Your problem sounds like a **** rear wheel cylinder and bad drums/rotors and abs sensor wire.

My car just did everything you describe, I put in new wheel cylinders, drums, brakes, rotors, and 2 new rear brake lines. For less than 200 bucks the car is like new again and has well over 100k.

You can do it yourself. Doesn't take special tools. I followed online how-to's.

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