Idle Air Control Valve: Aerio
- Turn ignition off. Disconnect IAC valve 2-pin harness connector. Measure resistance between IAC valve terminals. Resistance should be 8.6-10.6 ohms. Also, check continuity between IAC valve terminals and valve body. No continuity should be present. If measurements are as specified, go to next step. If measurements are not as specified, replace IAC valve.
- Reconnect IAC valve harness connector. Start engine and run until it reaches normal operating temperature. Disconnect IAC valve connector and check idle RPM. Connect 12-volt battery negative terminal to IAC terminal No. 1. Connect 12-volt battery positive terminal to IAC terminal No. 2. See Fig 1
. If idle speed increases, IAC valve is okay. If idle speed does not increase, replace IAC valve.
Courtesy of SUZUKI OF AMERICA CORP.