16-56 ELECTRICAL SYSTEM
Air Switching Valve
Air Switching Valve Operation Test
Remove the fuel tank (see Fuel Tank Removal in the Fuel
System (DFI) chapter).
Pull the air switching valve hose [A] out of the air cleaner
Take the air switching valve hose end outside of the
Reinstall the fuel tank (see Fuel Tank Installation in the
Fuel System (DFI) chapter).
Start the engine and run it at idle speed.
Plug [A] the air switching valve hose [B] end with your
finger and feel vacuum pulsing in the hose.
If there is no vacuum pulsation, check the hose line for
leak. If there is no leak, check the air switching valve (see
Air Switching Valve Unit Test).
Apply a soap and water solution or rubber lubricant to the
end of the air switching hose and install the hose on the
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 × Ω range and connect it to
the air switching valve terminals as shown.
Special Tool - Hand Tester: 57001-1394
Air Switching Valve Resistance
18 ∼ 22 Ω at 20°C (68°F)
If the resistance reading is except the specified value, re-
place it with a new one.
Connect the 12 V battery [A] to the air switching valve
terminals as shown.