4
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
4.31
TEMP / MANIFOLD ABSOLUTE PRESSURE SENSOR (T-MAP)
T-MAP OVERVIEW
Mounted on the intake plenum, the T-MAP
q
sensor
performs two functions in one unit
Air passing through the intake is measured by the T-MAP
and relayed to the ECU. These signals, comprised of
separate air temperature and manifold absolute pressure
readings, are processed by the ECU and compared to its
programming for determining the fuel and ignition
requirements during operation. The T-MAP sensor
provides the ECU with engine load data.
T-MAP SENSOR TEST
The T-MAP sensor should be tested using Digital
Wrench. When connected to Digital Wrench, observe the
Intake Air Temperature reading and the Manifold
Absolute Pressure reading. Intake Air Temperature and
Manifold Absolute Pressure should be close to what the
temperature and pressure are in your environment when
the key is turned on, engine not running. When the
vehicle is started, manifold absolute pressure will be
around 9 PSI (cold engine) and drop to around 6 PSI
(warm engine). If unsure about the readings, compare to
a known good unit.
Wiring harness issues are more likely to be the cause of
a poor running condition than a faulty T-MAP.
The T-MAP sensor is a non-serviceable item. If it is
faulty, it must be replaced.
T-MAP SENSOR REPLACEMENT
1. Remove the seat and disconnect the negative (-)
battery cable.
2. Remove the cargo box access panel.
3. Disconnect vehicle harness from T-MAP sensor.
4. Remove the T-MAP sensor retaining bolt
q
and
remove the sensor
w
from the intake plenum.
5. Apply lubricant to the new sensor o-ring and install
the new T-MAP sensor into intake plenum.
6. Install the T-MAP sensor retaining bolt and torque to
specification.
TORQUE
T-MAP Retaining Bolt:
7 ft-lbs (10 Nm)
FUEL SYSTEM
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