Component Tests and General Diagnostics

Service Information

Brake System Inspection and Test

Inspection

1. Brake System - Inspection

Inspect the brake system components listed. Repair or replace any parts that are leaking or damaged.






Test

1. Brake System - Test

Brake pedal sinks/fades when braking

1. Turn the ignition switch to LOCK (0).

2. Press the brake pedal several times until there is a hard brake pedal.

3. 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.

4. Holding the brake pedal, with about 98 N (10.0 kgf, 22.0 lbf), 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 reference mark on the steering wheel.

5. Apply steady pressure to the brake pedal for 3 minutes.

6. 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), check the advanced hydraulic booster system.