Kawasaki Z400 - Service manual > Air Switching Valve

Air Switching Valve Operation Test

• Refer to the Air Suction System Damage Inspection in the Periodic Maintenance chapter

Air Switching Valve Unit Test

• Remove the air switching valve (see Air Switching Valve Removal in the Engine Top End chapter).
• Connect a digital meter [A] to the air witching valve terminals as shown.

Air Switching Valve Resistance Standard: 20 - 24 0 m0.C (68ºF)

*If the digital meter does not read as specified value, replace it with a new one.

• Connect the 12 V battery [A] to the air switching valve terminals as shown.

• Blow the air to the intake air dud [A], and make sure does not flow the blown air from the outlet air duct [B].

• Disconnect the 12 V battery.
• Blow the air to the intake air duct [A] again, and make sure flow the blown air from the outlet air duct [B].

*If the air switching valve does not operate as described, replace it with a new one.

NOTE

To check air flow through the air switching valve, just blow through the air switching valve hose (intake side).

Air Switching Valve Circuit

1. Ignition Switch
2. Air Switching Valve
3. ECU
4. Engine Ground
5. Battery
6. Main Fuse 30 A
7. Starter Relay
8. Frame Ground (2)
9. Fuse Box (1)
10. Ignition Fuse 10 A
11. ECU Fuse 15 A
12. Relay Box
13. ECU Main Relay

Radiator Fan System

Fan Motor Inspection

• Remove the right middle fairing (see Middle Fairing Removal in the Frame chapter).
• Disconnect the connector [A].
•  Using an auxiliary leads, supply battery power to the fan motor.

*If the fan does not rotate, the fan motor is defective and must be replaced.

Radiator Fan Circuit

1. Ignition Switch
2. Fan Motor
3. Water Temperature Sensor
4. ECU
5. Engine Ground
6. Battery
7. Main Fuse 30 A
8. Starter Relay
9. Frame Ground (8)
10.  Frame Ground (1)
11. Fuse Box (1)
12. Ignition Fuse 10 A
13. Fan Fuse 15 A
14. Relay Box
15. Radiator Fan Relay

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