Coleman 400UTV-3 Owner's Manual page 115

8-10 Periodic Maintenance and Adjustment
Air damper
For the purpose of adjustment of air intake
volume.
Idle speed stepper motor
To stabilize the idle speed
Fuel injector
Inject the fuel into the cylinder
Intake air temperature sensor
Inspect engine intake air
according to the temperature, ECU will
automatically adjust the fuel injection volume.
Air intake pipe pressure sensor
For testing the negative pressure of the air
intake pipe, engine has the different working
conditions, the 2 parameters- opening of air
damper and pressure of air intake determine
the engine's working condition, ECU will
adjust the fuel injection volume according to
different negative pressure and opening of
air damper. Adjust the engine fuel injection
volume can adjust the output power and
output torque.
Water temperature sensor
For testing cooling water temperature,
according to the temperature difference,
ECU will automatically revise fuel injection
volume, to ensure the smooth operation of
the engine all the time.
Ignition signal
temperature,
Ignition signal arising from the magneto to
provide the ECU with correct ignition timing signal.
ECU
It is the core of EFI system, it used a
specially designed micro computer chip as a
controller，according to the information from
sensors, has been calculated to ensure
accurate control in different conditions from
the nozzle of the fuel injection volume. To