Reference - Sym ATTILA RS-21 EFi 150 Service Manual

4. FUEL INJECTION SYSTEM
¡ · As the fig 23 (5/8) shown, the menu provides with 4-set dynamic values of engine rpm, initial
position voltage of throttle valve idle speed, idle speed target value, and idle speed CO
corrective value.
Description:
initial position voltage of throttle valve idle speed: It means that the ECU memorizes the idle
speed voltage from the first time of throttle position sensor. This value can be a reference
for the throttle position sensor damaged.
idle speed target value: It means that the idle speed target value set by the ECU based on
current engine temperature and intake temperature.
idle speed CO corrective value: Based on CO value of the engine emission, it corrects the
air-flow of idle speed air by-pass valve.
¡ · As the fig 24 (6/8) shown, the menu provides with 4-set dynamic values of engine rpm,
accumulated running time, PWM output of temperature gauge, and idle speed valve opening.
Description:
accumulated running time: It means that the ECU's inner timer starts to count the ECU
operation time at every time to turn on the ignition switch, even the engine does not start,
and until turn off the ignition switch.
PWM output of temperature gauge: this model does not has this function.
idle speed valve opening.: It means that the opening of air by-pass valve at current idle
speed.
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This chapter Contents
Fig 23
Fig 24