Yamaha YZF-R1S Service Manual - Elec
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.