2005-2007 Polaris Ranger 500 service manual, Page 144Get this manual
ELECTRONIC FUEL INJECTION 4Install the retaining bracketNOTE: Do not allow the retaining bracket to contact the MAP bodyTorque the retaining screw to 29 inlbs(3.3 Nm)
IDLE AIR CONTROL (IAC)
General Information
The Idle Air Control (IAC) is used to stabilize the idle quality of the engine at cold start-up and after warm-up operationsMounted on the throttle body, the IAC contains stepper motor which receives varying voltage signal pulses from the ECMThese pulses determine the IAC plunger setting, thereby controlling the amount of air bypassing the closed throttle body for idle controlIf the IAC is disconnected or inoperative, it will remain at it's last operated position
INTAKE AIR TEMPERATURE SENSOR (IAT)
General Information
The intake air temperature sensor (IAT) is used to indicate charge air temperatures to the ECMMounted in the air box boot, the IAT sends varying voltage signal to the ECM in direct correlation to the ambient air temperatureThis signal is processed by the ECM and compared to the internal pre-programmed maps to determine the required fuel and ignition settings for the amount of engine load