Manifold Air Quality Sensor (Maqs); Maqs Test Ireplacement - Polaris Ranger RZR XP 900 2011 Service Manual

ELECTRONIC FUEL INJECTION
3. With the ignition turned off, disconnect the wire harness
from the ECU. Lift the connector locking lever and rotate
it up until the connector is free from the ECU.
NOTE: Upon removing the ECU connector, you
should hear a "click" when the connector is fully
open.
4. To install, reverse the procedure and tighten the mounting
screws to specification.
NOTE: Upon installing the ECU connector, you
should hear a "click" when the connector is fully
closed.
C
=T
ECU Retaining Screws
10 in. Ibs. (1.1 Nm)
4.14
MANIFOLD AIR QUALITY SENSOR
{MAQS)
Operation Overview
Mounted on the end of the dual throttle body assembly, the
MAQS performs three functions in one unit. The MAQS detects
intake air temperature, manifold absolute pressure and throttle
position.
These sensor signals, comprised of separate intake air
temperature, manifold absolute pressure readings and throttle
plate position are processed by the ECU and compared to its
programming for determining the fuel and ignition
requirements during engine operation. The MAQS provides the
ECU with engine load data.
MAQS Test I Replacement
The MAQS is a non-serviceable item and can only be tested
using Digital Wrench™. lfthe sensor is faulty, the dual throttle
body assembly must be replaced. Refer to "Throttle Body
Removal" procedure.
IMPORTANT: Thissensorshould only be tested using
Digital Wrench™ Diagnostic Software (dealer only).
9923144 - 2011 RANGER RZR XP 900 Service Manual
© Copyright 2011 Polaris Sales Inc.