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Home >> Audi >> 1993 >> S4 2.2 P >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Idle Control Systems >> Idle Air Control Valve >> Idle Air Control Valve Resistance
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Idle Air Control Valve Resistance

  1. Checking IAC valve electrically. Disconnect harness connector from IAC. See Fig 1.
  2. Using a DVOM, switch to resistance range (mode). Measure resistance across IAC terminals. See Fig 2.
  3. IAC resistance must be 7-11 ohms. If resistance is out of specification, replace IAC.
Fig 1: Identifying Idle Air Control Valve Harness Connector
G00160046Courtesy of AUDI OF AMERICA, INC.
Fig 2: Testing Idle Air Control Valve Resistance
G00160047Courtesy of AUDI OF AMERICA, INC.
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