GS300 Brake booster abs malfuncion c1322

[Joker]

Hello fellow lexus owners

Im having a bad time with my mk2 gs300. 

The brake booster started playing up, making squeaky noises then eventually stopped working. 

So i found a replacement online (secondhand) and fitted it. 

Now heres where the problem starts:

I can hear the brake booster working, making buzzing noise but the brakes are still bad, meaning the pedal is still going down and i have to double press the pedal to get the brakes working.

VSC, ABS, VSC OFF is still on

 

i did unplug the Battery when i changed the booster

i also bled the brakes

i connected it to obd, gave me a fault code

C1322 ABS MALFUNCTION 

 

im literally out of ideas now, please can anyone help me

[ColinBarber]

does the booster actually stop running once the vacuum has been built up? I suspect the replacement is faulty - it is a common issue on the series II GS pre-facelift (1998-2000).

 

[Joker]

When i press the brake pedal the booster starts buzzing then stops after a minute or so. I didnt have how to test the booster i just took the guys word for it

[ColinBarber]

Given that the pump stops it suggests it is working correctly. Normally they continuously run if they cannot create a vacuum until the system gives up and the alarm/warning lights come up.

It may not be bled properly.

BLEE.PDF

[TigerFish]

I agree with Colin, it does sound like it needs re-bleeding.


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