Sym MAXSYM 400i Service Manual page 223

Troubleshooting
No voltage
Battery over discharged
The cable disconnected
The fuse is blown
Improper operation of the main switch
Low voltage
The battery is not fully charged
Poor connection.
Poor charging system
Poor voltage regulator
No spark produced by spark plug
The spark plug is out of work
The cable is poorly connected, open or
short-circuited
Poor connection between ECU and ignition coil
Poor connection between ECU and main switch
Poor main switch
Poor ECU.
A.C.G. is out of work
Starter motor does not work
The fuse is blown
The battery is not fully charged
Poor main switch
Poor starter switch
The front and rear brake switches do not
operate correctly
Starter relay is out of work
The ignition coil is poorly connected, open or
short-circuited
The starter motor is out of work
To this chapter contents
Intermittent power supply
The connector of the charging system becomes
loose
Poor connection of the battery cable
Poor connection or short-circuit of the
discharging system
Poor connection or short-circuit of the power
generation system
Charging system does not operate properly
Burnt fuse
Poor contact, open or short circuit
Poor regulator rectifier
Poor ACG
Engine does not crank smoothly
Primary winding circuit
- Poor ignition coil
- Poor connection of cable and connectors
- Poor main switch
Secondary winding circuit
- Poor ignition coil
- Poor spark plug
- Poor ignition coil cable
- Current leakage in the spark plug
Incorrect ignition timing
- Poor ACG
- Improper installation of CPS
- Poor ECU
Weak starter motor
Poor charging system
The battery is not fully charged
Poor connection in the windings
The motor gear is jammed by foreign material
Starter motor is working, but engine does not
crank
Poor starter motor pinion
The starter motor runs in reverse direction
Poor battery
17. Electrical System
17-3