Inspect the brake system components listed. Repair or replace any parts that
are leaking or damaged.
Component Inspections:
Component |
Procedure |
Also check for |
Master Cylinder |
Look for damage or signs of fluid leakage at:
|
Bulging seal at reservoir cap. This
is a sign of fluid contamination. |
Brake Hoses |
Look for damage or signs of fluid leakage at:
|
Bulging, twisted, or bent lines. |
Caliper |
Look for damage or signs of fluid leakage at:
Piston seal. Banjo bolt connections. Bleed screw.
|
Seized or sticking caliper pins. |
VSA Modulator-Control Unit |
Look for damage or signs of fluid leakage at:
Line joints. Modulator-control unit.
|
|
Brake pedal sinks/fades when braking
Set the parking brake, and start the engine, then turn
off the A/C. Allow the engine to warm up to normal operating temperature
(radiator fan comes on twice).
Make sure the steering column lock lever is in the locked
position. Attach a 50 mm (1.97 in) piece of masking tape along the bottom of
the steering wheel, and draw a horizontal reference mark across it.
With the transmission in P or N, press and hold the brake
pedal lightly (about the same pressure needed to keep an A/T-equipped
vehicle from creeping), then release the parking brake.
While still holding the brake pedal, hook the end of the
tape measure behind the brake pedal, then pull the tape up to the steering
wheel. Note the measurement between the brake pedal and the reference mark
on the steering wheel.
Apply steady pressure to the brake pedal for 3 minutes.
-
Watch the tape measure.
If the measurement increases 10 mm (0.39 in) or less, the master cylinder
is OK. If the measurement increases more than 10 mm (0.39 in), replace the
master cylinder.
|
