2011 Polaris Ranger RZR ATV Service Manual, Page 141Get this manual
ELECTRONIC FUEL INJECTION IDLE AIR CONTROL (IAC)
Operation Overview
The Idle Air Control (IAC) is used to stabilize the idle quality of the engine at cold start-up and after warm-up operationsIAC
IAC Replacement
123Remove the seats, rear service panel and the rear cargo box (see Chapter 5)Loosen the hose clamps retaining the throttle bodyRemove the throttle body from the intake track and plug the intake boots with clean shop towelIAC
Mounted on the throttle body, the IAC contains stepper motor which receives varying voltage signal pulses from the ECUThese 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
Disconnect the vehicle harness from the IAC motorRemove the (3) Phillips-head mounting screws and remove the IAC from the throttle bodyInstall the new IAC and torque the mounting screws to specification