IAC Valve Resistance
Disconnect IAC valve connector. Measure resistance between terminals +B (Black/Yellow wire) and RSC (Yellow/Black wire), and between terminals +B (Black/Yellow wire) and RSO (Red/White wire) at IAC valve. See Fig 2. If resistance is not 17-24.5 ohms at 14-122°F (-10-50°C), or 22-29 ohms at 122-212°F (50-100°C), replace IAC valve. If resistance is as specified, reconnect IAC valve connector. Go to next procedure.