Pedal Assist Sensor
The biggest problems are the display being set to ‘auto’ or because the lead between the sensor
itself and the controller on the rear of the battery case have become disconnected.
A note about using Heat Shrink on cable connections.
We recommend that your installer uses heatshrink over all the cable connections at the
time of installation. This is to firstly reduce the risk of cables becoming disconnected
accidentally, and secondly to add additional protection from accidental tugging, water and
so on. Some owners prefer to do this, some don’t. This should be done by your service
agent as heat shrink requires heat to be applied to it when being installed. Overheating
can cause damage to the connection. If you suspect your cables are heatshrunk and
disconnected, please contact your service agent for advice.
Checking the pedal assist sensor connection
Step 1 Locate the Pedal Sensor!
This is the round thing that is between your crank and the pedal. Have a look on each side,
depending on the bike, it’s fitted on one side or the other. Now look for the lead that comes off it
and follow it up towards the saddle. It is supposed to connect a lead which comes out the back
of the battery case. The E90 wiring loom is simple, there is only one lead that size that will fit
together. (see diagram) Make sure that it’s connected properly, but don’t bend it or tug on it, it’s
designed to fit easily together. Look at both ends of the leads (see diagram). They only fit ONE
WAY, locate the two end and gently push together.
Test the sensor. Turn on the battery. Hold down the power on button on the display (see
diagram) until the display illuminates. Set the
mode
to ‘peddle assist’ by pressing the
blue up
arrow
until power bars appear and auto is turned off. Now get on your bike and peddle. The
motor should now kick in.
Step 2 Checking the throttle connection!
The most common problems with the throttle are.
Not setting the display mode to auto and/or a disconnected throttle cable.
Check the mode!
Locate the throttle on the handlebar. It’s the twisty thing next to the hand grip. Turn on the battery.
Turn on the display by pressing the onbutton until the display illuminates. Check the bike mode
