KYMCO AHG5, Service Manual

Page: 244 / 363

13. Fi DIAGNOSTIC TOOL
DT X360
6
3.4. Idle Air Bypass Valve or
ISC (Idle Speed Control)
4 Pins
Power Input Grounded
Heater Signal Output
Input: DC 8~16V Battery voltage
The ISC is combined by two sets of
independent coils. The operation is
controlled by the ECU in small steps to open
and restrict the valve through timing.
3.5. Inductive Ignition Coil
2 Pins
Power Input ECU
Input: DC 8~16V from battery voltage
The ECU controls the operation of the
ignition coil through the ground terminal.
After the primary circuit forms a magnetic
field by power pass through, the power will
be cut off by the ECU. The secondary coil
will produce the high volt around 20kV for
the spark plug to create the arc.
The power of arc can be controlled by the
length of the primary coil power-on time.
The timing of the primary coil power cut off is
the ignition timing.
Ignition coil is a high conversion ratio
transformer.
3.6. ETS (Engine Temperature
Sensor)
2 Pins
Grounded ECU
Input: DC 5V from ECU
The ECU provides power and detects
resistance.