All 4 calipers locking up any ideas? (5 Viewers)

[Sandroad]

I am going to take a look at the cap and see if that cpuld be the issue before spending $1300 on a master cylinder and brake booster. I was watching videos online so just bench bleed the master, remove the 4 bolts and few houses for the brake booster install the master and brake booster then bleed the brake lines like normal?

If there is a write up could someone provide a link please.

MC and booster failures are apparently rare in the 200. I couldn’t easily find a Mud write up on replacement. There is a lot of great brake info in the beginning of this thread, so that may help with a bleeding.

Post in thread 'Scored 2011 LC W/79K OMG CLEAN (2012 missing link)'

Oct 13, 2018

Testing brake system:

Does brake pedal feel firm, that’s first test.

We activated ABS hearing and feeling ABS pulse the brakes on and off, so that's working.

No alarm with key on, so that's good. Don't freak out if CEL or ABS light on. If you set off a DTC it may need clearing, which happens often while flushing. I use my BT OBDII or mini VCI cable to clear DTC. In the past, I would to drive to a parts store where I’d get them to hook then I push the clear button, they aren’t allowed to.

Next we test accumulator pump function and for air in system. This is done by evacuating...

• 2001LC

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[05ls430518]

Just ordered a master cylinder brake booster from bell lexus they had there 15% off, so saved $200 was only $1100 should be here wensday. I will do a write up on how to replace the master brake booster.

 

[05ls430518]

So update I tried bench bleeding it, spoke to bell lexus was told you have to use tech stream to bleed the master cylinder. Can I just pump the brakes and bleed using the calipers bleed screws.

 

[linuxgod]

So update I tried bench bleeding it, spoke to bell lexus was told you have to use tech stream to bleed the master cylinder. Can I just pump the brakes and bleed using the calipers bleed screws.

The FSM does say you need to use tech stream. You can get a mini VCI cable and a copy of the software for $50 off ebay

 

[05ls430518]

The FSM does say you need to use tech stream. You can get a mini VCI cable and a copy of the software for $50 off ebay

I do have a scantool arriving tomorrow that does have the ability to bleed abs systems, I hope that will be able to take care of the issue. If not I will go online and get tech stream as you suggested. Thank you for your help.

 

[fjc-man]

Only time I saw something like this was someone bled the brakes with, as it turns out, diesel fuel that was in a brake fluid can …. Swelled up all the seals and locked up the brakes. Dumb stuff happens.

 

[05ls430518]

Only time I saw something like this was someone bled the brakes with, as it turns out, diesel fuel that was in a brake fluid can …. Swelled up all the seals and locked up the brakes. Dumb stuff happens.

I totally agree mistakes happen but, I only use unopened bottles of brake fluid when doing brake stuff. I was told that it collects moisture once open, so any bottles thats over a couple months old is s***. Dk if its true but its something I always follow same as never using never-sieze on wheel studs, or spark plugs.

This was also doing it before I even touched the master cylinder/brake booster, unfortunately.