4.28
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
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
operations.
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
any of the readings are out of specification, replace the
IAC.
IAC Resistance Readings
PINS
RESISTANCE
PINS
RESISTANCE
1 - 2
30 Ω ± 1.2 Ω
4 - 5
30 Ω ± 1.2 Ω
2 - 3
30 Ω ± 1.2 Ω
5 - 6
30 Ω ± 1.2 Ω
1 - 3
60 Ω ± 2.4 Ω
4 - 6
60 Ω ± 2.4 Ω
IAC Replacement
1.
Remove the right side panel and disconnect the
negative (-) battery cable.
2.
Disconnect the vehicle harness from the IAC motor.
3.
Remove the (3) 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.
4.
Install the new IAC and torque the mounting screws
to specification.
IAC Mounting Screw:
17.7 in-lbs (2 ± 0.5 Nm)
5.
Reconnect the vehicle harness to the IAC motor.
6.
Reinstall the right side panel, connect the negative
(-) battery cable and install the drivers seat.
FUEL SYSTEM - GENERAL
Содержание 2014 Sportsman 570 EF
Страница 4: ......
Страница 226: ...5 32 9924871 R03 2014 Polaris Sportsman 570 EFI Service Manual Copyright 2013 Polaris Sales Inc BODY STEERING SUSPENSION...
Страница 282: ...6 48 9924871 R03 2014 Polaris Sportsman 570 EFI Service Manual Copyright 2013 Polaris Sales Inc NOTES CLUTCHING...
Страница 398: ...10 18 9924871 R03 2014 Polaris Sportsman 570 EFI Service Manual Copyright 2013 Polaris Sales Inc ELECTRICAL...
Страница 432: ...10 52 9924871 R03 2014 Polaris Sportsman 570 EFI Service Manual Copyright 2013 Polaris Sales Inc Fuel Pump ELECTRICAL...
Страница 434: ...10 54 9924871 R03 2014 Polaris Sportsman 570 EFI Service Manual Copyright 2013 Polaris Sales Inc Fan Control ELECTRICAL...
Страница 436: ...10 56 9924871 R03 2014 Polaris Sportsman 570 EFI Service Manual Copyright 2013 Polaris Sales Inc NOTES ELECTRICAL...
Страница 443: ......
Страница 444: ......
Страница 445: ......
Страница 446: ......
Страница 447: ......
Страница 448: ......
Страница 449: ......
Страница 450: ......
Страница 451: ......
Страница 452: ......
Страница 453: ......
Страница 454: ......
Страница 455: ......
Страница 456: ......