Idle Air Control Valve (Lac); Lac Test Ireplacement - Polaris Ranger RZR XP 900 2011 Service Manual

ELECTRONIC FUEL INJECTION
IDLE AIR CONTROL VALVE (lAC) lAC Replacement
Operation Overview
1. Remove the cargo box access panel.
The Idle Air Control (lAC) is used to stabilize the idle quality of
the engine at cold start-up and after warm-up operations.
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2. Locate the lAC valve above the engine and disconnect the
vehicle harness from the lAC motor.
lAC Test
lAC Valve Connector
The lAC is a non-serviceable item. If it is faulty, it must be
replaced. It can be 'bench tested' using the following method:
4. Install the new lAC motor and torque the mounting screws
to specification.
3. Remove the (3) Phillips-head mounting screws and remove
the lAC motor from the lAC housing.
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Set your meter to read Ohms. Check the resistance values at each
ofthe following pin locations ofthe lAC. If any ofthe readings
are out of specification, replace the lAC.
The lAC contains 1 stepper motor which receives varying
voltage signal pulses from the ECD. These pulses determine the
lAC plunger setting, thereby controlling the amount of air
bypassing the closed throttle body plates for idle control. If the
lAC is disconnected or inoperative, it will remain at it's last
operated position.
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4
5
6
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NOTE: Make sure not to twist or pinch the lAC lines
upon assembly.
1
2 3
C
=T
lAC Resistance Readings
lAC Mounting Screw Torque:
17.7 in. Ibs. (2
±
0.5 Nm)
Pins Resistance Pins Resistance
1 - 2 30 o± 1.2 0
4-5 30 o± 1.20
2-3
30 o± 1.2 0
5-6 30 o± 1.20
1 - 3
60 O±2.4 0
4-6
600±2.40
5. Reconnect the vehicle harness to the lAC motor.
6. Reinstall the cargo box access panel.
4.17
9923144 - 2011 RANGER RZR XP 900 Service Manual
© Copyright 2011 Polaris Sales Inc.