4.8
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
ECU REPLACEMENT
Although the need for ECU replacement is unlikely, a
specific replacement procedure is required to ensure that
all essential data contained within the original ECU is
transferred to the replacement ECU.
NOTICE
Refer to procedure and carefully follow all instructions
provided in Digital Wrench®.
1. Carefully follow the ECU replacement instructions
provided in Digital Wrench® to ensure that all
essential data contained within the original ECU is
transferred to the replacement ECU.
2. Remove the seat and engine access panel.
3. Remove the push rivet securing the top of the ECU
bracket to the chassis. Carefully remove the ECU and
bracket from the chassis.
4. Remove the ECU cover
5. Remove the screws that attach the ECU to the
chassis.
6. With the ignition turned off, disconnect the wire
harness from the ECU. Lift the connector locking
lever and rotate it up until the connector is free from
the ECU.
NOTICE
Upon removing the ECU connector, you should hear a
“click” when the connector is fully open.
7. To install, reverse the procedure and tighten the
mounting screws to specification.
NOTICE
Upon installing the ECU connector, you should hear a
“click” when the connector is fully closed.
TORQUE
ECU Retaining Screws:
24 in-lb (3 Nm)
FUEL SYSTEM
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