Pedal Feel Characteristics

During ABS stopping, solenoid valve clicking and pump motor operation may be heard, and brake pedal vibration/pulsation may be felt. The ABS prevents complete wheel lock-up, but some tire chirping may occur, depending on road surface. The chirping sound should not be interpreted as total wheel lock-up (although wheel lock-up may occur at speeds less than 5 MPH).

During an ABS stop, the master cylinder is isolated from wheel brakes, producing a hard pedal feel. The ABS is shut off toward end of ABS stop, when speed is less than 5 MPH. A slight brake pedal drop may be felt when ABS is shut off.

The system may detect wheel lock-up and activates ABS under the following conditions: braking on bumpy surface or when sand, gravel or other loose debris is on the road. Under such conditions, hard pedal feel and loss of deceleration may be experienced.

Hard pedal feel WILL NOT illuminate warning lights or set fault code. When investigating a hard pedal feel or excessive system noise, inspect sensor and tone wheel teeth for chips, damaged sensor pole tips, excessive tone wheel runout or gap.