Troubleshooting - Sym Wolf SB 250 Ni Service Manual

14. Electrical system

Troubleshooting

Charging system
No power supply
Disconnected battery cable

Battery over discharging

The fuse is blown

Improper operation of the main switch

Low voltage
The battery is not fully charged

Poor contact

Poor charging system

Poor regulator rectifier

Intermittent power supply
Loosened charging system connector

Poor battery cable connection

Poor connection or short-circuit of the

charging system
Poor connection or short-circuit of the power

generation system
Faulty charging system
The fuse is blown

Connector poor contact, short, or open

Poor regulator rectifier

Poor ACG

Starting system
Starter motor does not work
The fuse is blown

The battery is not fully charged

Poor main switch

Poor starter switch

The front or 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

14-4
Ignition system
No spark
Poor spark plug

The cable is poorly connected, open or

short-circuited
- Between ACG and ECU
- Between ignition coil and ECU
- Between main switch and ECU
Poor main switch and relay

Faulty ECU

Faulty ACG

Engine does not crank smoothly
Primary coil circuit

- Poor ignition coil
- Cables, wire, ,connector poor contact
- Main switch poor contact
Ignition circuit

- Poor ignition coil
- Poor spark plug
- Faulty ignition coil wire
- Current leakage in the spark plug cap
Incorrect ignition timing

- Faulty ACG
- Improper installation of CPS
- Faulty 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

Poor starter clutch

The starter motor run in reverse direction

Poor battery
