Yamaha YZF-R1S, Service Manual

Page: 435 / 457

8-42
SIGNALING SYSTEM
ELEC
YES NO
2. Voltage
S
Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness side)
as shown.
The wiring circuit
from the main switch
to the meter assem-
bly coupler is faulty
and must be re-
paired.
Positive tester probe
!
green / white
Negative tester probe
!
black / white
1
2
S
Turn the main switch to “ON”.
S
Measure the voltage (DC 12 V) of
green / white
and black / white at the
meter assembly coupler.
S
Is the voltage within specification?
This circuit is OK.
1
2
Replace the multi-
function meter.
NO
1. Multi-function meter bulb socket
S
Check the multi-function meter bulb socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
S
Is the multi-function meter bulb socket OK?
YES
EAS00806
7. The speedometer fails to come on.
2. Speed sensor
S
Connect the pocket tester (DC 20 V) to the
speed sensor coupler (wire harness side)
as shown.
Replace the speed
sensor.
NO YES
Positive tester probe
!
white / yellow
Negative tester probe
!
black / blue
1
2
S
Set the main switch to “ON”.
S
Elevate the rear wheel and slowly rotate it.
S
Measure the voltage (DC 5 V) of white / yel-
low and blue. 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.
S
Does the voltage reading cycle correctly?
This circuit is OK.