Honda Workshop Service and Repair Manuals

Frequency Solenoid Valve: Testing and Inspection
Frequency Solenoid Valve A

1.

Disconnect wiring harness from frequency solenoid valve A.

2.

Disconnect lower vacuum hose from valve and connect vacuum pump/gauge to valve.

3.

Apply vacuum to valve. Vacuum should hold.

4.

If vacuum does not hold, replace frequency solenoid valve A  and repeat test.

5.

If vacuum holds, connect battery positive terminal to green/black terminal of valve and negative battery terminal to black terminal. Valve should
not hold vacuum.

6.

If vacuum is held, replace frequency solenoid valve.