Page 212 - Manual Oficina Polaris RZR 570 13-18

FUEL SYSTEM

IDLE AIR CONTROL (IAC)

OPERATION OVERVIEW IAC Resistance Readings
The Idle Air Control (IAC) q is used to stabilize the idle
quality of the engine at cold start-up and after warm-up PINS RESISTANCE
operations.
q - w ≈ 26 Ω ± 10%

IAC REPLACEMENT
1. Remove the drivers seat and disconnect the
negative (-) battery cable.
2. Remove the cargo box access panel.
3. Disconnect the vehicle harness from the IAC motor.

4. Remove the three Phillips-head mounting screws
and remove the IAC from the throttle body. The
screws can also be accessed from the RH rear
wheel well area.

Mounted on the throttle body, the IAC contains 1 stepper
motor which receives varying voltage signal pulses from
the ECU. These pulses determine the IAC plunger
setting, thereby controlling the amount of air bypassing
the closed throttle body for idle control. If the IAC is
disconnected or inoperative, it will remain at it’s last
operated position.

IAC TEST
The IAC is a non-serviceable item. If it is faulty, it must be
replaced. It can be ‘bench tested’ using the following
method:
Set your meter to read Ohms. Check the resistance
values at each of the following pin locations of the IAC. If 5. Install the new IAC and torque the mounting screws
any of the readings are out of specification, replace the to specification.
IAC. Always test sensor at a room temperature of 70° F
(21.1 C). TORQUE

IAC Mounting Screw:
18 in-lbs (2 Nm)

6. Reconnect the vehicle harness to the IAC motor.
7. Reinstall the cargo box access panel, connect the
negative (-) battery cable and install the drivers seat.

4.26 9926813 R06 - 2013-2016 RZR 570 Service Manual
© Copyright Polaris Industries Inc.