Testing The Controller - E-Wheels EW-46 Service & Repair Manual

Testing the Controller:

To test that the controller is working properly,
checking the output voltage for the throttles
positioning sensor will be necessary. Leave the
scooter power turned on while testing, but Do Not
cross the throttle wires or a short may occur
which can cause damage, personal injury, or
death.
Use the two outside wires of the three prong
throttle wires on the harness, shown in the picture,
to obtain a voltage reading. Set the multimeter to
DC 20 (or closest setting higher than 20). If the
controller is working properly, it should be
emitting approximately 3.48 volts while plugged
into the harness with the scooter power turned on,
or approximately 4.99 volts with the harness
connection unplugged. If there is no voltage under
load, this means the controller has failed and needs
to be replaced.
To test that the controller is emitting the proper voltage to the motor, connect your multimeter to
any color combination on the motor phase wires where they connect at the yellow junction box.
Set your meter at DC 50 or higher, and test under load (with the scooter power turned on, while
pulling the throttle). The voltage should start at 0 and increase between 2.5-3.6 volts while under
full load (holding the throttle pulled at the way).
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