ELECTRICAL SYSTEM 16-55

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).

•Set the hand tester [A] to the × 1 Ω range and connect it to the air switching valve terminals as shown in the figure.

Special Tool - Hand Tester: 57001-1394

Air Switching Valve Resistance

Standard: 20 24 Ω at 20°C (68°F)

If the resistance reading is out of the specified value, replace it with a new one.

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

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

•Disconnect the 12 V battery.

•Blow the air to the inlet air duct [A] again, and make sure flow the blown air from the outlet air ducts [B].

If the air switching valve dose 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 (inlet side) [C].

16-56 ELECTRICAL SYSTEM

Air Switching Valve

Air Switching Valve Circuit

1.Ignition Switch

2.Engine Stop Switch

3.Air Switching Valve

4.ECU

5.Fuel Pump

6.Fuse Box

7.Ignition Fuse 15 A

8.Frame Ground

9.Battery 12 V 8 Ah

10.Main Fuse 30 A

11.Fuel Pump Relay

12.Relay Box