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Fast Idle Control Solenoid Valve

NOTE: The fast idle control solenoid valve is open when coolant temperature is less than 5°F (-15°C). If coolant temperature is less than 104°F (40°C), solenoid is open only when atmospheric pressure is less than 26 in. Hg. Vacuum is supplied to vacuum hose between solenoid valve and air flow tube.
  1. When the valve is open, 9 volts or more should be available between Black/Yellow (A) and Blue/Black (B) terminals on CRX Si) of control box No.1 wiring harness.
  2. Disconnect wiring harness from No. 1 control box. Disconnect vacuum hose No. 18 from air flow tube. Apply vacuum to the hose. It should hold vacuum. See Fig 1 .
    Fig 1: Testing Fast Idle Control Solenoid Valve Civic CRX Si models shown.
    G42704
  3. Connect battery positive terminal to Black terminal of No. 1 control box coupler, and battery negative terminal to Orange terminal. Disconnect vacuum hose No. 23 from intake manifold. Apply vacuum. It SHOULD NOT hold vacuum.
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