10.59
ELECTRICAL
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9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
Speed Control Diagram
The speed control system utilizes the ECU, Speed Sensor, Solenoid Valve, and engine vacuum from the throttle body
to operate. The ECU powers the system through the ECU/IGN/FUEL Relay. When the speed sensor signal rises over
40 Kph (25 Mph), the ECU triggers the solenoid valve to open, allowing atmospheric pressure on top of the air control
body diaphragm which limits the amount of air entering the engine. Once the vehicle speed drops below 37-40 Kph (23-
25 Mph), the solenoid valve is closed by the ECU and the operation repeats. Should the vehicle speed reach 67 Kph
(42 Mph), the ‘check engine’ light will illuminate on the LCD gauge to indicate there is a problem with the system.
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