A/C Idle Control Solenoid Valve

1986 Accord & Prelude
When valve is activated, 9 volts or more should be present between black/yellow (+) terminal and red (-) terminal on control box.
1. Open control box cover and disconnect rectangular 6 terminal electrical connector from control box.
2. Disconnect lower hose to A/C idler boost solenoid valve from check valve and apply vacuum to hose. Valve should hold vacuum.
3. Continue applying vacuum to hose and briefly energize solenoid by connecting battery positive (+) terminal to black/yellow wire terminal on control box and connect battery negative (-) terminal to red terminal. Valve should not hold vacuum when energized.
4. If A/C idle boost solenoid valve fails to operate as outlined, valve is defective.