GENERAL INFORMATION



The 4ABS ensures directional stability and control during hard braking.
This ABS uses a 4-sensor system that controls all four wheels independently of each other.

note
  • *1: EBD (Electronic Brake-force Distribution)
  • *2: For more details about CAN (Controller Area Network), refer to GROUP 54C .



Specifications
Item
Specifications
ABS control type
4 sensors
Wheel speed sensor
Magnetic encoder
Front
86 (N pole: 43, S pole: 43)
Rear
96 (N pole: 48, S pole: 48)
Type
Semiconductor

CONSTRUCTION DIAGRAM






MAIN COMPONENTS AND FUNCTIONS
Name of part
Number
Outline of function
Sensor
Wheel speed sensor
1
Outputs the frequency signal in proportion to the rotation speed of each wheel to ABS-ECU.
Magnetic encoder for wheel speed detection
2
When the magnetic encoder for wheel speed detection (a plate on which north and south pole sides of the magnets are arranged alternately) rotates, the wheel speed sensor outputs frequency pulse signal in proportion to each wheel speed.
Stop lamp switch
3
Outputs the signal indicating whether the brake pedal is depressed or not to ABS-ECU.
G sensor <4WD>
4
Incorporated in ABS-ECU, and detects the longitudinal acceleration of the vehicle.
Actuator
Hydraulic unit
5
Drives the solenoid valve using the signal from ABS-ECU, and controls the brake fluid pressure for each wheel.
ABS warning lamp
6
Informs the driver of the system status by illuminating, flashing, or turning off the warning lamp according to the signal from ABS-ECU.
ABS warning display
7
Informs the driver of the system status by illuminating or turning off the warning display according to the signal from ABS-ECU.
Brake warning lamp
8
Used as the warning lamp for the parking brake, brake fluid level, and EBD control. Informs the driver of the system status by illuminating or turning off the warning lamp according to the signal from ABS-ECU.
Brake warning display
9
Used as the warning display for brake fluid level, and EBD control. Informs the driver of the system status by illuminating or turning off the warning display according to the signal from ABS-ECU.
Diagnosis connector
10
Outputs the diagnosis code and establishes the communication with M.U.T.-III.
ABS-ECU
11
Controls actuators (described above) based on the signals coming from each sensor.
Controls the self-diagnosis and fail-safe functions.
Controls the diagnosis function (M.U.T.-III compatible).

SCHEMATIC DIAGRAM




note Dashed lines indicate the CAN bus communication lines.

ABS ELECTRICAL DIAGRAM