Ecu Service / Replacement; Temperature And Barometric Air Pressure Sensor (T-Bap) - Polaris 2009 Ranger RZR 800 EFI Manual

RANGER RZR 800 EFI RPM Limit:
Hard Limit - Injector suppression occurs
• High: (6500, RZR), (6600, RZR "S")
• Low: (6500, RZR), (6600, RZR "S")
• Neutral: (6500, RZR), (6600, RZR "S")
• Reverse: (6500, RZR), (6600, RZR "S")
• Park: (6500, RZR), (6600, RZR "S")
Soft Limit - Timing suppression occurs
• High: (6375, RZR), (6550, RZR "S")
• Low: (6375, RZR), (6550, RZR "S")
• Neutral: (6375, RZR), (6550, RZR "S")
• Reverse: (6375, RZR), (6550, RZR "S")
• Park: (6375, RZR), (6550, RZR "S")
ECU Service
Never attempt to disassemble the ECU. It is sealed to prevent
damage to internal components. Warranty is void if the case is
opened or tampered with in any way.
All operating and control functions within the ECU are pre-set.
No internal servicing or readjustment may be performed. If a
problem is encountered, and you determine the ECU to be
faulty, contact the Polaris Service Department for specific
handling instructions. Do not replace the ECU without factory
authorization.
The relationship between the ECU and the throttle position
sensor (TPS) is very critical to proper system operation. If the
TPS is faulty, or the mounting position of the TPS to the throttle
body is altered in any manner, the TPS must be recalibrated
(see "TPS Adjustment" procedure if required).
For the purpose of troubleshooting, a known-good ECU from
another Polaris RANGER RZR EFI of the same model may be
used without system or engine component damage.
ECU Replacement
1. Remove the (2) retaining screws holding the ECU.
2. With the Ignition turned off, disconnect the wire harness
from the ECU.
3. To install, reverse the procedures and tighten screws to
specification.
ECU Retaining Screws
10 in. lbs. (1.1 Nm)
= T
ELECTRONIC FUEL INJECTION
TEMPERATURE AND BAROMETRIC
AIR PRESSURE SENSOR (T-BAP)
Operation Overview
Mounted in the throttle body intake boot, the T-BAP sensor
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 its programming for determining
the fuel and ignition requirements during operation.
T-BAP Test
The T-BAP sensor is a non-serviceable item. If it is faulty, it
must be replaced.
IMPORTANT: The T-BAP sensor requires a 5 VDC
input to operate, therefore the T-BAP sensor should
only be tested using the Digital Wrench™ Diagnostic
Software (dealer only). Refer to the EFI Diagnostic
Software Manual for more information.
T-BAP Replacement
1. Disconnect sensor from engine harness.
2. Using a 3/8" wrench, remove the retaining bolt and remove
the sensor from the intake boot.
4
T-BAP
4.11