4ABS

GENERAL DESCRIPTION

FEATURES





ABS has been adopted as standard or options equipment in vehicles with L, M and SPORT to maintain directional stability and steering performance during sudden braking. The ABS control method used is a 4-sensor, 4-channel method which provides independent control for all wheels. The system has the following features.

EBD CONTROL
In ABS, electronic control method is used whereby the rear wheel brake hydraulic pressure during braking is regulated by rear wheel control solenoid valves in accordance with the vehicle's rate of deceleration and the front and rear wheel slippage which are calculated from the signals received from the various wheel sensors. EBD control is a control system which provides a high level of control for both vehicle braking force and vehicle stability. The system has the following features:
- Electronic Brake-Force Distribution System (EBD) control has been added to provide the ideal braking force for the rear wheels.
- Fail-safe function which ensures that safety is maintained
- Diagnostic function which provides improved serviceability
- Because the system provides the optimum rear wheel braking force regardless of the vehicle laden condition and the condition of the road surface, the system reduces the required pedal depression force, particularly when the vehicle is heavily laden or driving on road surfaces with high frictional coefficients.
- Because the duty placed on the front brakes has been reduced, the increases in pad temperature can be controlled during front brakes applying to improve the wear resistance characteristics of the pad.
- Control valves such as the proportioning valve are no longer required.





CONSTRUCTION DIAGRAM





SYSTEM CONFIGURATION DIAGRAM





ABS ELECTRICAL CIRCUIT DIAGRAM