Yamaha XT660X(S) Automobile User Manual


 
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ELEC
SIGNALING SYSTEM
YES
NO
7. The coolant temperature warning light fails
to come on.
YES
NO
YES
NO
2. Speed sensor
Connect the pocket tester (DC 20 V) to the
speed sensor coupler as shown.
Positive tester probe
pink
1
Negative tester probe
black/white
2
Set the main switch to ON.
Elevate the rear wheel and slowly rotate it.
Measure the voltage (DC 5 V) of pink and
black/white. With each full rotation of the
rear wheel, the voltage reading should
cycle from 0.6 V to 4.8 V to 0.6 V to 4.8 V.
Does the voltage reading cycle correctly?
This circuit is OK. Replace the speed
sensor.
P
O/R
B/W
L
W
B/L
1
2
1. Coolant temperature warning light LED
Check the LED of the coolant temperature
warning light.
Refer to CHECKING THE BULBS AND
BULB SOCKETS.
Is the coolant temperature warning light
LED OK?
Replace the meter
assembly.
2. Voltage
Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness
end) as shown.
Positive tester probe
yellow/blue
1
Negative tester probe
black/white
2
Set the main switch to ON.
Measure the voltage (DC 5 V) of yellow/
blue 1 on the meter assembly coupler
(wire harness end).
Is the voltage within specification?
The wiring circuit
from the ECU to the
meter assembly cou-
pler is faulty and
must be repaired.
Dg
G/L
R/W
Ch
R/G
Y
B/W
Lg
G/W
Y/L
Ch R/G
Y
G
G/L
R/W
G/W
Y/L
B/W
Lg
1
2