Doohan iTango Service Manual page 27

plug and transfer the multimeter to the buzzer. When the ignition lock is in the open state, the measurement of electricity if the red
line and the black line of the ignition lock are "ON", if it does not pass, it means that the lock is burned and needs to be replaced.
③ DC converter burnout
A. The battery output is normal, the speed meter, light or speaker does not work, the vehicle does not have forward gear and can not
move forward, only reverses gear, the DC converter is burnout, need to be replaced or repair the DC converter.
B. The battery output is normal, the speed meter, light or speaker do not work, but the vehicle can run normally, it means the DC
converter is burnout, they need to be replaced or repaired.
④ Speed meter burnout
A. Speed meter does not work (the screen does not light), the vehicle can be normal driving, lights and speakers are normal, the
speed meter is burnout, need to replace.
B. Speed meter working (screen is lighted), but no gear and power display, no speed show while the vehicle is running, to check
whether the VCU is working or not
⑴ if the VCU power supply is normal:
VCU and anti-theft device share same power supply, turn off the ignition lock at this time, to press the key of lock, unlock or searching
with the remote control, whether it can be worked properly, if yes, it is means that power supply is normal, and go ahead for next step
⑵ disconnect the battery more than 2 minutes, then connect the battery, open the ignition lock to observe whether the speed meter
is normal, if the speed meter shows normal, it means VCU is abnormal, contact the service supporter to upgrade the VCU software
by remote control.
⑶ If you disconnect the battery and still abnormal, check whether the connector is well connected and reliable for VCU and speed
meter, the battery plug whether is well inserted, and reinsert.
⑷ Check whether the communication of speed meter is burnout, if burnout, you need to replace it.
Chart of indicator flashing of LED on the Controller
Times of LED
flashing Fault type
1 Over
protection
2
Undervoltage
protection
3 Over current
protection
4
Locked-rotor
protection
5
Hall protection
6
Power
protection
Fault description
voltage
The input voltage is too high after
checked by controller
The input voltage is too low after
checked by controller
The phase line of the motor is short
circuit or it is short circuit between the
phase line and power supply
Motor is locked-rotor, couldn't running
well.
Motor HALL input is abnormal
tube Power tube
abnormal
① Please use the battery supplied by our company
② The controller is faulty and need to be replaced
① charge the battery to ensure that the battery is
normal
② To check whether the wiring of the controller is
normal connected.
③ The controller is abnormal and the controller need
to be replaced
① Check,whether the motor is normal, or, replace
the motor
②
replace the controller
The battery load is too large or uphill, the motor can
not running properly
① Check,whether it is well connected for the motor
HALL plug-in and controller.
② Check,whether the motor Hall is burnout, replace
the motor
Turn off the ignition lock and disconnect the battery
self-inspection is plug to confirm, then to replace the controller
solution
Check, whether the controller is burnout, or