[35B] FOUR-WHEEL ANTI-SKID BRAKE SYSTEM (4ABS) - - GENERAL INFORMATION | PRINT PAGE / INDEX / PRIOR / NEXT

GENERAL INFORMATION
FEATURES The 4ABS ensures directional stability and controllability during hard braking. This ABS uses a 4-sensor 3-channel system that controls the right and left front wheels independently of each other and controls the rear wheels simultaneously (select low control* ). The basic system is the same as that of 2001 LANCER. NOTE: * Select low control: Control system that compares the speeds of the right and left wheels and performs the same fluid pressure control on both wheels according to the speed of the wheel that is likely to be locked EBD (Electronic Brake-force Distribution system) 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
EBD CONTROL In ABS, electronic control is used so 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 stet 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: Because the system provides the optimum rear wheel braking force regardless of vehicle load conditions and the condition of the road surface, the system reduces the required pedal depression force, particularly when the vehicle is heavily loaded or driven on road surfaces with high frictional coefficients. Because the duty placed on the front brakes is reduced, the increases in pad temperature can be controlled during brakes application to improve the wear resistance characteristics of the pad. Control valves such as the proportioning valve are no required.
SPECIFICATIONS
Item | Specification
--- | ---
ABS control method | 4-sensor, 3-channel
No. of ABS rotor teeth | Front | 43
Rear | 43
ABS speed sensor | Type | Magnet coil type
Gap between sensor and rotor mm | 0.85 <Front (Non-adjustable type)> 0.3 - 0.8 <Rear (Non-adjustable type)>
CONSTRUCTION DIAGRAM
Name of part | Number | Outline of function
--- | --- | ---
Sensor | ABS sensor | 1 | Send alternating current signals at frequencies which are proportional to the rotation speeds of each wheel to the ABS-ECU.
Stoplamp switch | 2 | Sends a signal to the ABS-ECU to indicate whether the brake pedal is depressed or not.
G sensor <4WD> | 3 | Detects acceleration in the travel direction of the vehicle and sends a signal that is converted to a voltage value to the ABS-ECU.
Actuator | Hydraulic unit | 4 | Drives the solenoid valves according to signals from the ABS-ECU in order to control the brake hydraulic pressure for each wheel.
ABS warning lamp | 5 | Illuminates in response to signals from the ABS-ECU when a problem develops in the system.
Diagnosis connector | 6 | Outputs the diagnosis codes and allows communication with the MUT-II/III.
ABS control unit (ABS-ECU) | 7 | Controls actuators (described above) based on the signals coming from each sensor.
Controls the self-diagnosis and fail-safe functions.
Controls the diagnostic function (MUT-II/III compatible).
SYSTEM CONFIGURATION DIAGRAM
ABS ELECTRICAL CIRCUIT DIAGRAM

[35B] FOUR-WHEEL ANTI-SKID BRAKE SYSTEM (4ABS) - - GENERAL INFORMATION | PRINT PAGE / INDEX / PRIOR / NEXT

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