1995 Lexus LS 400 I don't know what to do now!

SHANAYE

MEMBER
1995 LEXUS LS 400
V8
2WD
AUTOMATIC
180,000 MILES

I bought a 95 Lexus Ls 400 used. The breaks were going to the floor when I bought it, but the previous owner had just got it checked and told me I needed a mastercylinder. Well since then I have replaced the master cylinder, and bleed the breaks. What do you think it could be if there was no air in the lines? ABS needs to be blead or replaced? Please help!

1 Reply

DAVE H

MECHANIC
13,383 POSTS

Brake System
ABS bleeding procedure is the same for all systems. On models without TRAC, if master cylinder reservoir is empty or is suspected of containing air, bleed master cylinder first. On models with TRAC, bleed TRAC system first. See appropriate TRACTION CONTROL SYSTEM under BLEEDING PROCEDURES.
Ensure master cylinder reservoir is full of brake fluid. Connect vinyl tube to caliper bleeder screw and insert other end of tube in a clear container 1/4 full of brake fluid.
Slowly pump brake pedal several times. While depressing brake pedal, loosen bleeder screw until fluid starts to flow out, and then close bleeder screw. Repeat operation until no bubbles are present in fluid. Tighten bleeder screw to 96 INCH lbs. (11 N.M). See BRAKELINE BLEEDING SEQUENCE.
NOTE:If master cylinder has been disassembled, is new or reservoir becomes empty, bleed master cylinder before bleeding wheels.

Traction Control (TRAC) System
Ensure master cylinder reservoir is full of brake fluid. Disconnect harness connector from pump. Connect auxiliary test harness to pump. See Fig. 2. Remove battery cover and air cleaner inlet. Remove air cleaner assembly with hose.
Connect tube to bleeder screw on TRAC actuator. See Fig. 3. Loosen bleeder screw. Connect auxiliary test harness to battery. Bleed fluid with pump operating. See Fig. 4. Tighten bleeder screw. Operate pump for additional 30 seconds. Fill reservoir. Remove test harness. Clear diagnostic trouble codes. See CLEARING CODES.