2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 142Get this manual

2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 142

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calculate the engine RPM and among other things, control the maximum engine RPM to compute and select the proper parameters accordinglyThe VSS (vehicle speed sensor) supplies the MPEM with the vehicle