Frequency Solenoid Valve A

1. Proceed as follows:
a. Disconnect air hose between air control valve A and frequency solenoid valve A at the control valve, then blow air into the hose.
b. If air does not flow, proceed to step 2. If air flows, replace frequency solenoid valve and repeat test.
2. Apply battery voltage to frequency solenoid vale A green/white wire terminal, then blow air from air suction hose. Air should flow.
3. If air flows, frequency solenoid valve A is satisfactory. If air does not flow, replace frequency solenoid valve A and repeat test.
4. If air flows, replace control valve A and repeat test. If air does not flow, replace frequency solenoid valve A and repeat test.