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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different car >> Section 164 (Engine Controls - System/Component Tests - EEC-IV (4.9L)) >> Relays & Solenoids >> Solenoids >> Idle Air Control (IAC) Solenoid

Idle Air Control (IAC) Solenoid

WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford Econoline, 1995 Ford Club Wagon, and 1995 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Solenoid is by-pass air type. Ensure ignition is off. Disconnect IAC solenoid harness connector. Set DVOM to 200-ohm scale. Measure resistance between IAC solenoid connector terminals. Solenoid has diode. See Fig 1 . Connect DVOM (+) test lead to terminal VPWR and DVOM (-) lead to terminal IAC.
  2. Resistance should be 6-13 ohms. If resistance is not as specified, replace solenoid. Faults in IAC solenoid or circuit should set a diagnostic trouble code. See QUICK TEST in TESTS W/CODES - EEC-IV (4.9L) article. If no diagnostic trouble code has been set, proceed to CIRCUIT TEST KE in the appropriate TESTS W/CODES - EEC-IV (4.9L) article for additional testing and specifications.
Fig 1: Identifying IAC Solenoid Connector Terminals (4.9L)
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