How To Test Motor Sensors - X-TREME XB-700Li Owner's Manual

Throttle measurement: Leave connector connected while measuring.
3. Locate the throttle connector on the controller, it will be a red connector with 3 wires coming
out of it of RED, BLACK & GREEN. Put you Black meter probe in on the black wire. Insert
Red probe in on the red wire and turn the scooter in the ON position. These wires are the 5v
supply to the throttle, and should be within this range ( 4.9 - 5.5)
Now remove the red probe from the Red wire and put it on the Green wire and need 2
recorded readings one @ no throttle and other @ 100% throttle. Should be about .2vdc @ 0
Throttle and 4.9vdc @ 100% Throttle.
4. Ignition Check:
Place Black meter probe on main BLACK battery wire on the controller. Locate the 2 wire
connector with Orange and Blue wire from controller. Insert Red meter probe on Orange wire
and should have +50vdc. Insert Red meter probe on the Blue wire and should only have
+50vdc when the ignition key switch is in the ON position.
5. DC/DC controller check. This is the smaller silver box under the headlight assembly and has 3
wires coming out of it. Red & Black wire should have 48vdc with the key on, and Yellow and
Black should have 12vdc before and after the Glass Fuse. The DC/DC Controller powers
accessories like the lights, horn etc.

How To Test Motor Sensors

Sort out the motor's wiring. There is eight wires total, or leads, running from the motor to the
controller. Three larger wires power the motor and are larger (16 AWG): Green, Blue, and Yellow.
Two wires power the sensors and are smaller: Red and Black. And three wires connect the sensors
to the controller: Green, Blue, and Yellow. All 5 small wires are connected to one white quick
disconnect. For this project, we are concerned only with the smaller wires of Green, Yellow and
Blue.
Now, there are two methods used to determine a bad connection or which of the three sensors have
failed. Both require the motor to be fully assembled.
The first is to simply run the motor while one sensor lead is disconnected, "refer to section-A
below on how to do this", then again for the second lead, and a third time for the last lead. If one
sensor is dead (and that's your only problem), you'll see that disconnecting one or the other of the
good sensors prevents the motor from turning altogether, while disconnecting the bad one has no
effect at all--it still sputters.
If that didn't work, try this second method. It is more complex, but useful to identify a bad
controller vs. the motor, and more nuanced issues or problems stemming from multiple failures.
Remove the 3 small wires from the 5 wire connector leaving the red and black wire attached.
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