Using Suzuki Scan Tool

1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
2) Warm up engine to normal operating temperature and keep it idle speed.
3) Check that "IAC DUTY" value displayed on SUZUKI scan tool increases when idle air adjusting screw is tightened and reduces when loosened.
If check result is as described above, idle air adjusting screw and its passage are in good condition.
If not, idle air adjusting screw is faulty or air passage is clogged.