GENERAL INFORMATION

FEATURES

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.

EBD ^* (Electronic Brake-force Distribution system) control can obtain ideal rear wheel brake force.
Hydraulic unit function is integrated into the hydraulic brake booster (HBB).
Hydraulic unit function is integrated into the hydraulic brake booster (HBB).
Switching solenoid valve is adopted to improve operation feeling by reducing the pedal kickback when the ABS operates.
The system to control the four wheels independently is adopted for cornering to improve braking force.

note

^*: EBD (Electronic Brake-force Distribution)

Specifications

Item		Specifications
ABS control type		4 sensors
No. of rotor teeth	Front	43
No. of rotor teeth	Rear	43
Wheel speed sensor	Type	Magnet coil type

CONSTRUCTION DIAGRAM

Component		Number	Outline of functions
Sensor	Wheel speed sensor	1	Sends alternating voltage 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	3	Detects the acceleration level of the vehicle in the forward/reverse direction to send signals converted into a voltage value to the ABS-ECU. It detects the longitudinal acceleration of the vehicle. Then it sends a signal to the ABS-ECU.
	Centre differential lock detection switch	4	Detects the transfer driving mode.
	Rear differential lock switch^*	5^*	Sends the rear differential lock state to ABS-ECU.
Actuator	Hydraulic brake booster (HBB)	6	Drives the solenoid valves according to signals from the ABS-ECU in order to control the brake hydraulic pressure for each wheel.
	Valve relay	7	It is turned on/off by the signal from the ABS-ECU. The ABS-ECU shuts down the solenoid valves by this relay, when malfunction is detected.
	HBB motor relay	8	Is turned on by the signal from the ABS-ECU, and energizes the motor in the HBB.
	ABS warning lamp	9	Illuminates in response to signals from the ABS-ECU when a problem develops in the system.
	Brake warning lamp	10	Illuminates in response to signals from the ABS-ECU when a problem develops in the system.
Diagnosis connector		11	Sets the diagnosis codes and allows communication with the M.U.T.-III.
ABS control unit (ABS-ECU)		12	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).

note

^*:Vehicles with rear differential lock (Option).

SYSTEM CONFIGURATION DIAGRAM

note

^*:Vehicles with rear differential lock (Option).