Yamaha YZF-R1S Service Manual - Elec
8-39
SIGNALING SYSTEM
ELEC
C
YES
NO
The wiring circuit
from the turn signal
switch to the turn sig-
nal light connector is
faulty and must be
repaired.
Left turn signal / position light
Positive tester probe
! chocolate
Negative tester probe
! ground
Right turn signal / position light
Positive tester probe
! dark green
Negative tester probe
! ground
1
2
S Turn the main switch to “ON”.
S Set the turn signal switch to “
” or “
”.
S Measure the voltage (DC 12 V) of the choco-
late
or dark green
at the turn signal light
connector (wire harness side).
S Is the voltage within specification?
1
2
This circuit is OK.
A
B
1. Neutral indicator light (LEDs)
S Check the neutral indicator light for continu-
ity.
Refer to “CHECKING THE LEDs”.
S Are the neutral indicator light OK?
EAS00801
4. The neutral indicator light fails to come on.
YES
NO
Replace the meter
assembly.
YES
NO
2. Neutral switch
S Check the neutral switch for continuity.
Refer to “CHECKING THE SWITCHES”.
S Is the neutral switch OK?
Replace the neutral
switch.
3. Starting circuit cut-off relay (diode)
S Disconnect the starting circuit cut-off relay
coupler from the wire harness.
S Connect the pocket tester (Ω 1) to the
starting circuit cut-off relay coupler as
shown.
S Check the starting circuit cut-off relay for
continuity.
Positive tester probe
!
blue / yellow
Negative tester probe
!
sky blue
Continuity
Positive tester probe
!
sky blue
Negative tester probe
!
blue / yellow
No
continuity
1
2
2
1
EAS00753
5. Voltage
S Connect the pocket tester (DC 20 V) to the
turn signal light connector or meter assem-
bly coupler (wire harness side) as shown.
Left turn signal light
Right turn signal light
Turn signal indicator light
A
B
C