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4.11
ELECTRONIC FUEL INJECTION
4
9923142 - 2011 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2010 Polaris Sales Inc.
RANGER RZR 800 EFI RPM Limit:
Max RPM Limit - Injector and ignition suppression.
• RZR: 6600 RPM (All Gears)
• RZR S / RZR 4: 6750 RPM (All Gears)
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, the TPS must be adjusted.
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 procedure and tighten screws to
specification.
TEMP / MANIFOLD ABSOLUTE
PRESSURE SENSOR (T-MAP)
Operation 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.
T-MAP Sensor Test
The T-MAP sensor is a non-serviceable item. If it is faulty, it
must be replaced.
IMPORTANT: This sensor should only be tested using
the Digital Wrench™ Diagnostic Software (dealer
only).
T-MAP Sensor Replacement
1. Remove the seats and rear service panel. (see chapter 5).
2. Remove the rear cargo box (see chapter 5).
3. Remove the cable tie from the sensor connector.
4. Disconnect vehicle harness from T-MAP sensor.
5. Remove the retaining bolt and remove the sensor from the
intake boot.
6. Use a light coating of soapy water on the grommet to aid
installation of the new sensor.
= T
ECU Retaining Screws
10 in. lbs. (1.1 Nm)
T-MAP