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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different car >> Section 158 (Engine Controls - System/Component Tests - EEC-IV (4.0L)) >> Relays & Solenoids >> Solenoids >> Idle Air Control (IAC) Solenoid

Idle Air Control (IAC) Solenoid

WARNING: This page is about a different car, the 1995 Ford Explorer and 1995 Ford Aerostar. 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 the appropriate TESTS W/CODES - EEC-IV (4.0L) article. If no diagnostic trouble code has been set, see CIRCUIT TEST KE in the appropriate TESTS W/CODES - EEC-IV (4.0L) article for additional testing and specifications.
Fig 1: IAC Solenoid Connector Terminal ID (Aerostar & Explorer)
G93A76497
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