Fuel Cut Control System - Miata
- To check system operation, connect New Generation Star (49 T088 0A0) scan tool to DLC-2. DLC-2 is located under left side of instrument panel, behind fuse block cover. Ensure engine is at normal operating temperature. Allow engine to idle. Turn A/C switch off.
- Using scan tool, access DIAGNOSTIC DATA LINK menu, and select PCM. Highlight and select PID/DATA MONITOR AND RECORD. Select RPM and INJ. Scan tool will measure and display fuel injector pulse width. Increase engine speed to 2500 RPM, then quickly close throttle valve.
- Fuel injection pulse width should be zero milliseconds until engine speeds drops below 1000 RPM, then pulse width should be 2-5 milliseconds. If pulse width is as specified, Fuel cutoff system is functioning properly.