Sym Fiddle III 50 Service Manual page 131

4. ELECTRONICALLY CONTROLLED CARBURETOR SYSTEM
Treatment of abnormal phenomena:
1.It can"t online →first, confirm whether the cassette correctly, next, check whether the electronic
controlled unit normally, then, replace a new part and recheck it
2.The engine can't be start → related parts or electronic controlled unit abnormally, replace a new part
and recheck it
3.It appears fault code → related parts or electronic controlled unit abnormally, conquer the inducement
of fault and recheck it.
Fault Code and Check Light Flashing Lighting Identification Table:
Electric control parts
TPS(Throttle position sensor)
Air compensating valves
Engine temperature sensor
O sensor
2
Diagnostic instrument using method introduce:
1.Connect the battery;
2.Connect computer and vehicle with data line;
3.Turn on computer,open the software,and turn the key to the position of "on".
Engine Temperature Sensor fault:
When engine temperature sensor problem happened, the software shows that engine temperature signal
too low (show as the above picture)
4-12
Led blinking code
1 blinking signal
2 blinking signals
3 blinking signals
4 blinking signals
Fault Description
TPS Error:signal lower than 0.5V
Air valve in short circuit
Air valve in open circuit
Engine temperature sensor in short-circuit
Engine temperature sensor in open-circuit
O sensor in short circuit
2
Sensor-default
SYM