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Brake pedal fault

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Brake pedal fault

PostPosted by rayyzfr1 » Wed Aug 30, 2017 9:55 pm

Hi, just got my 2001 gen 2 today, it is a 2.0 vvti auto lwb model
Driving home today every now again, about 15 times during a 50 mile trip the brake pedal pulsed once with a squeeling noise, this happened both when i was stopped at traffic lights, junctions etc and a few times while actually braking to stop or slow down. This would only last for a second, one pulse of the pedal.
Would anyone know if this is a common fault or not, i have no warning lights on the dash
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Re: Brake pedal fault

PostPosted by Uncle bob » Thu Aug 31, 2017 8:46 am

New one on me :s_scratchhead just a possibility that the abs sensors on the wheel hubs have a rust build up and need to be cleaned.
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Re: Brake pedal fault

PostPosted by nickcc » Thu Aug 31, 2017 7:37 pm

After fitting new calipers and pads I still get the squeal from the front brakes. Fitting anti vibration shims would probably help but, to be honest, I've just learned to live with it.
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Re: Brake pedal fault

PostPosted by rayyzfr1 » Fri Sep 01, 2017 8:03 pm

Thanks, the discs and pads have just been replaced but this is not brake squeel, this is a noise coming from what sounds like in the cabin and the brake pedal moves up and down very quickly just once, no noise from the brakes themselves
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Re: Brake pedal fault

PostPosted by anchorman » Fri Sep 01, 2017 11:25 pm

Correct. Probably the reason why your car was sold. It's the ABS pump modulating. It's probably a broken exciter ring or faulty sensor. It thinks a wheel is locked up.
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Re: Brake pedal fault

PostPosted by rayyzfr1 » Sun Sep 03, 2017 3:58 pm

Thanks anchorman, i have just bought an icarsoft i950 to check for any fault codes, the car does not have any after checking. The brake pads and discs have just been replaced so i am thinking you are right about a broken or damaged abs ring, will check those out next
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Re: Brake pedal fault

PostPosted by anchorman » Sun Sep 03, 2017 5:38 pm

rayyzfr1 wrote:Thanks anchorman, i have just bought an icarsoft i950 to check for any fault codes, the car does not have any after checking. The brake pads and discs have just been replaced so i am thinking you are right about a broken or damaged abs ring, will check those out next

You won't get fault codes out of the ABS on an early RAV. It's messy to be honest. It might involve all the hubs down to check the rings. If one is particularly dirty, look at that first and check all the leads and connections for anything obvious.
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Re: Brake pedal fault

PostPosted by rayyzfr1 » Tue Sep 05, 2017 11:42 pm

Many thanks anchorman, how can i get access to a workshop manual to check on how to do it, when i click on the forum to see that particular bit i cannot see a link to any manuals
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Re: Brake pedal fault

PostPosted by anchorman » Wed Sep 06, 2017 11:49 am

The manuals don’t tell you much. You can visibly check the exited rings although its a proper ball ache to get at them. However, if you pay somebody else to do it the it gets expensive. As for the sensors, try googling but some will give off a small voltage if you spin the wheel and some might show up a value if you do a resistance check or even continuity. They are all a bit different and as its a rare fault, I don’t know which is on the RAV. If there is a crack or a tooth missing off an exciter it will cause your problem.
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