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# How to Diagnose a Faulty MainBoard/Speed Controller

### The most common symptoms of a faulty MainBoard/Speed Controller are:

* Vehicle turns on but does not drive. 
* Vehicle does not turn left/right via remote.
* Vehicle does not pair to parental remote.
* Vehicle goes backward but not forward.
* Vehicle is turning on and displays full voltage but does not drive.
* Vehicle works with the Pedal but not Parental Remote. 

### Depending on the symptoms above, here are a few ways you can troubleshoot a faulty MainBoard/Speed Controller

* Test the Ride on with the Remote Control first.  
* Check the battery Voltage to confirm it is not the battery.
* Check the all clips are plugged into the MainBoard/Speed Controller and no wires are hanging out.
* If the car is not turning left or right first check the bolt on the steering rod, then check the steering motor is connected properly, if both checks pass then the chances are, the MainBoard/Speed Controller is faulty.


${youtube}[RiiRoo Help - How to Diagnose a Faulty MainBoard/Speed Controller?](96zhYbC2bY0)