Idle Air Control Valve

NOTE: Only component testing procedure is covered. For Idle Air Control (IAC) valve system and circuit testing procedure, see appropriate SELF-DIAGNOSTICS article.

Turn ignition off. Disconnect Idle Air Control (IAC) valve 3-pin harness connector for Optima & Magentis (Canadian), Rio, Spectra and Sportage, and 6-pin harness connector for Sedona. For IAC valve location, see Figure-Figure . Check resistance between IAC valve terminals. For IAC valve terminal identification and resistance specification. See Fig 1. See IDLE AIR CONTROL VALVE RESISTANCES table. If resistances are not as specified, replace IAC valve. For IAC valve removal and installation, see IDLE AIR CONTROL VALVE under AIR INDUCTION SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article.

Fig 1: Identifying Idle Air Control Valve Connector Terminals

Courtesy of KIA MOTORS AMERICA, INC.

IDLE AIR CONTROL VALVE RESISTANCES

Measure Between Terminals No.

⁽¹⁾ Resistance - Ohms

Optima & Magentis (Canadian)

1 & 2

17-18

2 & 3

15-16

Rio

1 & 2

16.5-18.5

2 & 3

14.5-16.5

Sedona

1 & 2

29-38

2 & 3

29-38

4 & 5

29-38

5 & 6

29-38

Spectra

1 & 2

16.5-18.5

2 & 3)

14.5-16.5

Sportage

1 & 2

16.5-18.5

2 & 3

14.5-16.5

⁽¹⁾	At 68° F (20° C).