TESTING

Air Suction Valve

1. Remove the air suction valve assembly.
2. Blow air through the air inlet to see if air flows smoothly through the outlet while emitting a hissing sound. If air does not flow smoothly, the read valve could be stuck closed. Replace the reed valve.
3. Blow air through the outlet side of the valve to see if air flows through the inlet. If air flows, the reed valve is broken or stuck open. Replace the reed valve.
4. Check the valve after it has been disassembled. To disassemble, proceed as follows:
   1. Check the inlet and outlet case for cracks or damage.
   2. Check the gasket for cracks or damage.
   3. Clean the reed valve thoroughly.
   4. Check for check for waves, cracks or dents in the seat.
   5. Check the reed for cracks or a broken point.
   6. Check the valve for a rusty stopper.
   7. Replace any broken or damaged part.

Air Suction Solenoid

1. Remove the solenoid electrical harness.
2. Check the resistance between the positive and negative terminals. Resistance should be 33–40 ohms.
3. Check the resistance between the positive or negative terminals, and the solenoid body. Resistance should be at least 1M ohm.
4. Check the vacuum passage for opening and closing operation while applying battery voltage to the positive and negative terminals.
5. If the solenoid does not function as specified, replace the solenoid.