Principles of Operation: Notes

The anti-lock brake system (ABS) module manages anti-lock braking.

When the ignition switch is placed in the RUN position, the ABS module carries out a preliminary electrical check. At approximately 20 km/h (12 mph), the hydraulic pump motor is turned on for approximately 0.5 second. Any malfunction of the ABS disables the ABS and the yellow ABS warning indicator illuminates; however, the power-assist braking system still functions normally.