Idle Air Control Valve

IDLE AIR CONTROL (IAC) VALVE RESISTANCE

Application

Ohms

LS400 ⁽³⁾

Cold ⁽¹⁾

31-61

Hot ⁽²⁾

38-71

⁽¹⁾	IAC valve temperature of 14-122°F (-10-50°C).

⁽²⁾	IAC valve temperature of 123-212°F (51-100°C).

⁽³⁾	Measure resistance between terminal B1 and terminals S1 and S3. Also, measure resistance between terminal B2 and terminals S2 and S4. See Fig 1.

Fig 1: Identifying IAC Valve Terminals