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Home >> Isuzu >> 1996 >> Trooper LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Controls - System/Component Tests) >> Fuel System >> Idle Control System >> Idle Air Control (IAC) Valve
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Idle Air Control (IAC) Valve

WARNING: This page is about a different car, the 1996 Acura SLX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect harness connector to motor. Check resistance across IAC coil terminals "A" to "B" and "C" to "D". Resistance should be 40-80 ohms. If okay, go to next step. If resistance is not as specified, replace IAC valve.
  2. Check resistance between IAC terminals "B" to "C" and "A" to "D". Resistance should be infinite. If resistance is not as specified, replace IAC valve.
    NOTE: Functional testing of Idle Air Control (IAC) valve requires a bidirectional scan tool capable of cycling PCM output devices or a special IAC Driver and Noid Light Set (222L or J-37027 ).
    Fig 1: Identifying Idle Air Control (IAC) Connector Terminals
    G96B10109Courtesy of ISUZU MOTOR CO.
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