Principles of Operation

The anti-lock brake control module with or without Advance Trac®/IVD simultaneously manages the anti-lock braking, traction control in conjunction with the engine control systems to maintain vehicle control during deceleration and acceleration.

When the ignition switch is put in the RUN position, the module will do a preliminary electrical check and, at approximately 20 km/h (12 mph), the hydraulic pump motor is turned on for approximately one half-second. Any malfunction of the anti-lock brake control system will disable the traction control and Advance Trac®/IVD and the anti-lock brake warning indicator will illuminate. However, the power-assist braking system will function normally.