RX400h rear brake problem
06-02-17, 05:12 AM
#1
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RX400h rear brake problem
Hello,
I have a 2006 RX400h. I was evaluating the work involved to replace the rear wheel bearing, so remove the rear disc, I removed the rear caliper, to get the caliper off the disc I pushed back the pads just enough, then removed the caliper, then removed the disc to check my tools to remove the rear wheel bearing, then put it all back together. I then started the engine, pressed the brake pedal and the dashboard lit up with Check VSC System as well as red and amber brake lights, red warning triangle etc.
I pressed the brake pedal a few times and felt the pressure build and thought brake pressure is ok, maybe the lights will go out, so I went for a test drive and did some forceful brake tests, all seemed fine except the dash lights didn't go out and are still on.
I went round the car checking the brakes, both front brakes are warm/hot and the rear right is warm/hot, suggesting the brake force on the discs are fine, except, the rear left is cold so no brake force by the pads on the disc.
So, I have previously changed the pads all round by winding back the piston, replacing the pads, starting the engine, depressing the brake pedal a few times, feel the pressure build and all is ok, I have also recently changed the discs and pads all round in the same manner and no problems at all.
The problem seems to have arisen from only pushing the pads back enough to get the caliper off over the disc and now there is no pad pressure on the rear left disc when the brake pedal is pressed.
Any thoughts/ideas on resolving this is appreciated.
Kind regards
SamHello,
I have a 2006 RX400h. I was evaluating the work involved to replace the rear wheel bearing, so remove the rear disc, I removed the rear caliper, to get the caliper off the disc I pushed back the pads just enough, then removed the caliper, then removed the disc to check my tools to remove the rear wheel bearing, then put it all back together. I then started the engine, pressed the brake pedal and the dashboard lit up with Check VSC System as well as red and amber brake lights, red warning triangle etc.
I pressed the brake pedal a few times and felt the pressure build and thought brake pressure is ok, maybe the lights will go out, so I went for a test drive and did some forceful brake tests, all seemed fine except the dash lights didn't go out and are still on.
I went round the car checking the brakes, both front brakes are warm/hot and the rear right is warm/hot, suggesting the brake force on the discs are fine, except, the rear left is cold so no brake force by the pads on the disc.
So, I have previously changed the pads all round by winding back the piston, replacing the pads, starting the engine, depressing the brake pedal a few times, feel the pressure build and all is ok, I have also recently changed the discs and pads all round in the same manner and no problems at all.
The problem seems to have arisen from only pushing the pads back enough to get the caliper off over the disc and now there is no pad pressure on the rear left disc when the brake pedal is pressed.
Any thoughts/ideas on resolving this is appreciated.
Kind regards
SamHello,
06-02-17, 08:21 PM
#2
Weird, that should not have caused any problems. What are you using to measure the temps? If you did hard braking and LR was not grabbing you would probably notice. Anyway, look to see if the pads are seated. Push them back and have someone press on the brake and see if the pad pushes them back against the rotor.
06-03-17, 05:56 AM
#3
Check the wiring to the speed sensor of that wheel. Did you unplug anything when you were taking things apart? Scan for codes. The code will tell you what the car thinks is wrong.
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