Technical Information - Inlet Air Pressure Sensor

 

Atmospheric pressure sensor and camshaft position sensor are not equipped with the EX650A/B. As a substitute of these sensors above, the EX650A/B recognizes atmospheric pressure and intake stroke of #1 by the signal of inlet air pressure sensor.

 

The ECU detects atmospheric pressure when the ignition is switched ON. While the engine is run-ning, the ECU also presumes atmospheric pressure by analyzing the waveform of boost pressure over fixed period. The intake stroke is recognized by waveform of boost pressure, therefore the system can recognize the difference of each stroke.

 

GENERAL INFORMATION 1-15

 

Technical Information – ABS (Anti – Lock Brake System)

 

Outline

 

ABS controls the brake caliper fluid pressure by means of mechatronics - a combination of electronic and hydraulic control technology in order to keep the friction force between the tires and the road surfaces close to the maximum value and prevent wheel lock. But it does not operate during cruising.

 

ABS Total System

 

1.	ECU	13.	Front Brake Caliper
2.	ABS Indicator Light (LED)	14.	Front Wheel Rotation Sensor
3.	Pump Motor	15.	Front Wheel Rotation Sensor Rotor
4.	Pump	16.	Rear Brake Caliper
5.	Front Reservoir	17.	Rear Wheel Rotation Sensor
6.	Front Inlet Solenoid Valve	18.	Rear Wheel Rotation Sensor Rotor
7.	Front Outlet Solenoid Valve	19.	ABS Kawasaki Self-diagnosis System Con-
8.	Rear Inlet Solenoid Valve		nector
9.	Rear Outlet Solenoid Valve	20.	ABS Solenoid Valve Relay
10.	Brake Lever	21.	ABS Motor Relay
11.	Brake Pedal	22.	Rear Reservoir
12.	ABS Hydraulic Unit

 

GENERAL INFORMATION

 

Technical Information – ABS (Anti – Lock Brake System)

 

ABS System Block Diagram

 

1.	Power Source	12.	Inlet Solenoid Valve
2.	Ignition Power Source	13.	ABS Motor Relay
3. Battery Power Source	14.	Pump Motor
4.	Indicator Light Output	15.	Hydraulic Unit
5.	ABS Indicator Light (LED)	16.	ABS Controller
6.	ECU	17.	ABS Hydraulic Unit
7.	ABS Solenoid Valve Relay	18.	ABS Kawasaki Self-diagnosis System Con-
8.	Output		nector
9.	Monitor Input	19.	Wheel Rotation Input
10.	Valve Output	20.	Wheel Rotation Sensor
11.	Outlet Solenoid Valve

 

GENERAL INFORMATION 1-17

 

Technical Information – ABS (Anti – Lock Brake System)

 

Related Parts and Function

 

 

1. Front Wheel Rotation Sensor

 

2. Front Wheel Rotation Sensor Rotor

 

3. Rear Wheel Rotation Sensor

 

4. Rear Wheel Rotation Sensor Rotor

 

5. ABS Indicator Light (LED)

 

6. ABS Hydraulic Unit

 

7. ABS Fuse Box

 

8. ABS Kawasaki Self-diagnosis System Connector

 

Wheel Rotation Sensor

 

The wheel rotation sensors output the rotation speed of each wheel to the ECU in the ABS hydraulic unit. The wheel rotation sensor is installed to the front fork and rear caliper bracket, and the sensor rotor is pressed into the brake disc. The number of teeth on the front and rear sensor rotor is 50.

 

ABS Indicator Light (LED)

 

The condition or the failure of the ABS system is indicated by various patterns of the ABS indicator light (LED) blinking.

 

GENERAL INFORMATION

 

Technical Information – ABS (Anti – Lock Brake System)

 

ABS Hydraulic Unit

 

The outlet and inlet solenoid valves, reservoir, pump motor, solenoid valve relay, motor relay, and ECU are built in the ABS hydraulic unit.

 

1. Brake Lever

 

2. Brake Pedal

 

3. Pump Motor

 

4. Rear Inlet Solenoid Valve

 

5. Rear Outlet Solenoid Valve

 

6. Rear Reservoir

 

7. Rear Caliper

 

8. Front Inlet Solenoid Valve

 

9. Front Outlet Solenoid Valve

 

10. Front Caliper

 

11. Front Reservoir

 

12. Orifice

 

13. Filter

 

14. Check Valve

 

GENERAL INFORMATION 1-19

 

Technical Information – ABS (Anti – Lock Brake System)

 

Inlet Solenoid Valve

 

Inlet solenoid valves control the brake pressure of each wheel by combining the operation of the outlet solenoid valve. The ECU changes the electric current in the solenoids of the inlet solenoid valve (2 way, 2 position electromagnetic valve) to move the tappet and change the fluid pressure to “Increase Mode”, “Hold Mode”, or “Decrease Mode”.

 

1. Increase Mode

 

2. Hold and Decrease Mode

 

3. Tappet

 

4. Valve Body

 

5. From Master Cylinder

 

Outlet Solenoid Valve

 

Outlet solenoid valves control the brake pressure of each wheel by combining the operation of the inlet solenoid valve. The ECU changes the electric current in the solenoids of the outlet solenoid valve (2 way, 2 position electromagnetic valve) to move the armature and change the fluid pressure to “Increase Mode”, “Hold Mode”, or “Decrease Mode”.

 

1. Decrease Mode

 

2. Increase and Hold Mode

 

3. Armature

 

4. Valve

 

5. To Reservoir

 

GENERAL INFORMATION