Yamaha NEOS 50 YN50 (2002) [155/161] Signalling system

Yamaha NEOS 50 YN50 (2002) [155/161] Signalling system
ELEC
SIGNALLING SYSTEM
7-25
2. Speed sensor
Connect the pocket tester (DC 20 V) to the
speed sensor coupler (wire harness side)
as shown.
Positive tester probe

blue/green
Negative tester probe

black/yellow
LB
R
B
Y
/
R
Y
/
L
G
/
Set the main switch to “ON”.
• Elevate the front wheel and slowly rotate it.
Measure the voltage (DC 12 V) of
red/yellow and black/yellow. With each full
rotation of the front wheel, the voltage rea-
ding should cycle from 0 V to 5 ~ 11V to 0
V to 5 ~ 11V, etc.
Does the voltage reading cycle correctly?
Replace the speed
sensor.
YES
NO
The circuit is OK.

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