Temperature / Barometric Air Pressure Sensor (T-Bap); Operation Overview; Temperature And Barometric Air Pressure Sensor Test; Temperature And Barometric Air Pressure Sensor Replacement - Polaris 2008 sportsman 800efi Service Manual

TEMPERATURE / BAROMETRIC AIR
PRESSURE SENSOR (T-BAP)

Operation Overview

Mounted on the throttle body intake, the temperature and
barometric air pressure sensor (T-BAP) performs two functions
in one unit.
Air passing through the intake is measured by the T-BAP and
relayed to the ECU. These signals, comprised of separate air
temperature and barometric air pressure readings, are processed
by the ECU and compared to it's programming for determining
the fuel and ignition requirements during operation.
Temperature and Barometric Air Pressure
Sensor Test
The temperature and barometric air pressure sensor (T-BAP) is
a non-serviceable item. If it is faulty, it must be replaced. This
sensor requires a 5 Vdc input to operate, therefore the T-BAP
sensor should only be tested using the Polaris Diagnostic
Software (dealer only). Refer to the EFI Diagnostic Software
Manual for more information.
Temperature and Barometric Air Pressure
Sensor Replacement
1. Disconnect sensor from engine harness.
2. Using a 10mm wrench, remove the retaining bolt and
replace the sensor, using a light coating of oil on the o-ring
to aid installation.
3. Torque the retaining bolt to specification.
T-BAP Retaining Bolt Torque:
29 in. lbs. (3.3 Nm)
= T

THROTTLE POSITION SENSOR (TPS)

Operation Overview
The throttle position sensor (TPS) is used to indicate throttle
plate angle to the ECU.
Mounted on the throttle body and operated directly off the end
of the throttle shaft, the TPS works like a rheostat, varying the
voltage signal to the ECU in direct correlation to the angle of the
throttle plate. This signal is processed by the ECU and compared
to the internal pre-programmed maps to determine the required
fuel and ignition settings for the amount of engine load.
NOTE: The correct position
established and set at the factory. Do not loosen the
TPS or alter the mounting position. If the TPS is
repositioned, replaced or loosened it must be re-
calibrated.

Throttle Position Sensor Replacement

The correct position of the TPS is established and set at the
factory. If the TPS is repositioned, replaced or loosened it must
be re-calibrated.
1. Remove the side panel assembly and air box.
2. Disconnect sensor (A) from the harness.
3. Loosen and rotate the throttle body (B) to gain access to the
retaining screw.
4. Remove the retaining screw and replace the sensor.
5. Refer to "TPS Initialization" for setting the TPS voltage.
FUEL INJECTION
of the TPS
B
A
4.15
is
4