Cub Cadet Challenger 500, Service Manual

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Engine Management System
7 ‐ 2
Layout of EMS Components
COMPONENTS OF EMS
1) Electronic Control Unit

The ECU continuously monitors the operating conditions of the engine through
the system sensors. It also provides the necessary computation, adaptability, and
output control in order to minimize the tailpipe emissions and fuel consumption,
while optimizing vehicle drivability for all operating conditions. The ECU also
provides diagnosis when system malfunctions occur.

Handling

This is the electrical brain for the UV. Because of this it requires special
handling. Do not subject this unit to excessive heat, water, mud or debris.
Do not clean it with solvents or corrosive liquids. Improper care or handling can
cause ECU failure and or loss of performance.

Maintenance, Service and Repairs

The ECU is a non-serviceable part. Once there are problems, it’s important to
first determine if the problem is caused by software/calibration. If it is caused by
software/calibration, please refer to the