Pedal Feel Characteristics

During ABS stopping or LTCS acceleration, solenoid valve clicking and pump motor operation may be heard and brake pedal vibration/pulsation may be felt. During ABS/LTCS operation, the master cylinder is isolated from wheel brakes, producing a hard pedal feel. A slight brake pedal drop may be felt when ABS/LTCS is shut off.

The system may detect wheel lock-up or slip and activate ABS/LTCS under the following conditions: braking or accelerating 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/acceleration may be experienced.

Hard pedal feel will not make warning lights come on or set fault message. When investigating a hard pedal feel or excessive system noise, inspect sensor and tone wheel teeth for chips, damaged sensor pole tips, and excessive tone wheel runout or gap.