Road Test: Notes

For an overview of a road test, refer to NOISE, VIBRATION & HARSHNESS .

Avoid locking the brakes. Locked brakes are not an indication of braking efficiency.

MECHANICAL AND ELECTRICAL VISUAL INSPECTION

Mechanical	Electrical
Brake master cylinder Brake caliper piston Brake discs Wheel bearings Brake pads Power brake booster Brake pedal linkage Booster vacuum hose Tires Foreign material	Parking brake switch Damaged or corroded wiring harness Brake master cylinder fluid level switch

For low or spongy brake pedal concerns:

check and, if necessary, refill the brake master cylinder reservoir.
bleed the brake system and retest the brake pedal feel.
if the brake pedal is still low or spongy, check the wheel bearings. Refer to DISC (4x2) or FRONT - 4WD COIL SPRING (4x4) for front wheel bearings, and to REAR DRIVE AXLE/DIFFERENTIAL-8.8IN. or REAR DRIVE AXLE/DIFFERENTIAL-9.75IN. for rear wheel bearings.

For a slow or incomplete brake pedal return concern:

inspect for binding, damage, correct installation or interference at the brake pedal.
check the power brake booster for binding, damage and correct installation.

For vibration concerns when brakes are applied: