Performance Characteristics

When ignition is turned on, a popping sound and slight brake pedal movement may be noticed. When vehicle is first driven, a humming sound may be heard and/or felt. These conditions are normal.

During an ABS stop, groaning, popping and/or ticking may be heard inside passenger compartment. If ABS operation occurs during hard braking, some pulsation may be felt in vehicle body, due to suspension movement during hard braking. After an ABS stop, ABS will turn off when vehicle speed drops to 5 MPH or less. When ABS turns off because of vehicle speed being 5 MPH or less, or ABS is no longer needed, a slight pedal drop may be felt. Stopping on a bumpy road may cause ABS to activate because of wheel hop caused by bumps.

Some rear wheel slip is desired for maximum braking performance. Rear wheel slip may be heard as a "chirping" sound, which is considered normal under most conditions, depending on road surface. Do not interpret "chirping" as total rear wheel lock-up. Light, patched tire marks may be left on pavement after an anti-lock stop.

The ABS has self-diagnostic capabilities. To enter diagnostic mode, vehicle speed must be less than 6 MPH and not in an ABS operation situation. ABS lamp will blink ON and OFF. If vehicle has stored a hard trouble code, such as CAB power failure, ABS lamp will illuminate without blinking.