Pinpoint Test 1: Vibration When Brakes Are Applied

PINPOINT TEST 1: VIBRATION WHEN BRAKES ARE APPLIED

Normal Operation

During moderate to heavy braking, noise from the hydraulic control unit (HCU) and pulsation in the brake pedal can be observed. Pedal pulsation coupled with noise during heavy braking or on loose gravel, bumps, or wet or snowy surfaces is acceptable and indicates correct functioning of the ABS system. Pedal pulsation alone or steering wheel nibble (frequency is proportional to the vehicle speed) indicates a concern with a brake or suspension component.

Possible Causes
- Uneven brake pad wear
- Brake disc pad transfer
- Brake disc
- Brake drum
- Suspension components

Diagnostic Procedure

Step 1-Step 5:

Step 6-Step 7: