Sym SYM series, Manual, Page: 73 / 178

16. ELECTRICAL EQUIPMENT SYM
16-4
TROUBLE DIAGNOSIS
Charging System
No power supply
l
Dead battery
l
Disconnect battery cable
l
Fuse burned out
l
Faulty ignition switch
Low voltage
l
Weak battery
l
Loose battery connection
l
Charging system failure
l
Voltage-current regulator failure
Intermittent power supply
l
Loosen wire connector in charging system
l
Loose battery cables
l
Loose charging system connection
l
Loose connection in lighting system
Charging system failure
l
burn Fuse
l
Loose, broken or shorted wire or wire
connection
l
Faulty voltage-current regulator
l
Faulty alternator
Ignition
System
No spark produced by spark plug
l
The spark plug is out of work
l
The cable is poorly connected, open or
short-circuited
-
Between alternator and C.D.I.
-
Between CDI and ignition coil.
-
Between CDI and main switch
l
Poor main switch
l
Poor C.D.I.
l
alternator is out of work
Engine does not crank smoothly
l
Primary coil circuit
-
Poor ignition coil
-
Poor connection of cable and connectors
-
Poor main switch
l
Secondary coil circuit
- Poor ignition coil
- Poor spark plug
- Poor high-tension cable
- Current leakage in the spark plug cap
l
Incorrect ignition timing
-
Poor alternator
-
Improper installation of the pulse sensor
-
Poor C.D.I.
Starting System
Starter motor does not work
l
The fuse is blown
l
The battery is not fully charge
l
Poor main switch
l
Poor starter switch
l
The front and rear brake switches do not
operate correctly
l
Starter magnetic switch is out of work
l
The ignition coil is poorly connected, open or
short-circuited
l
The starter motor is out of work
Weak starter motor
l
Poor charging system
l
The battery is not fully charged
l
Poor connection in the windings
l
The motor gear is jammed by foreign material
Starter motor is working, but engine
does not crank
l
Poor starter motor pinion
l
Poor starter clutch
l
The starter motor run in reverse direction
l
Poor battery