Idle Control Solenoid Valve

1987 Prelude
1. Disconnect 6 pin connector from control box.
2. Disconnect upper vacuum hose of solenoid valve from intake manifold and apply vacuum to hose.
3. If vacuum is not held, replace valve and repeat test.
4. Attach battery positive terminal to black/yellow terminal of solenoid valve and battery negative terminal to green/black terminal.
5. Apply vacuum to hose.
6. If vacuum is held, replace valve and repeat test.