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FUEL SYSTEM
TEMPERATURE / MANIFOLD ABSOLUTE PRESSURE (T-MAP)
T-MAP OVERVIEW
Mounted on the throttle body intake manifold, the T-MAP
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.
4.24
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 is 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 retaining bolt
w
from the intake boot.
5. Use a light coating of soapy water on the grommet
to aid installation of the new sensor.
w
6. Install the sensor
motion to properly seat the grommet
7. Install the retaining bolt and torque to specification.
TORQUE
T-MAP Retaining Bolt:
24 in-lbs (2.8 Nm)
9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
q
and remove the sensor
by inserting it with a twisting
e
.
© Copyright Polaris Industries Inc.
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