Yamaha YZF-R1K Service Manual page 388

EB812010
TROUBLESHOOTING
The tachometer starts to display the self-
diagnosis sequence.
Check:
1. throttle position sensor
2. Exup
3. fuel level indicator light
NOTE:
• Before troubleshooting, remove the
following part(-s):
1) rider seat
2) fuel tank
3) air filter case
• Troubleshoot with the following spe-
cial tool(-s).
Pocket tester
YU-03112
EB812020
1. Throttle position sensor
CIRCUIT DIAGRAM
B/L B/R B Y/B O
G/Y Sb B/Y R/W L/R Gy
Gy W L/B
W/R Y L
L/R
G/Y
B/R L Y/L B/R
B/Y
B/Y B/L W/B B/Y
B/R
E
L L
W/R W/R
B/L
B/L
F
Y
L
Y
L Y B/L
B/L
F Throttle position sensor
G Ignitor unit
B
R/B R/B
R/W
B
O O
R/B
B
Gy Gy
G
Gy Gy
B/L
L/B Y/B Sb
W B
8 - 59
SELF-DIAGNOSIS
1.Wire harness
• Check the wire harness for continuity.
Refer to "CIRCUIT DIAGRAM".
• Is the wire harness OK?
YES
EB812401
2.Throttle position sensor
• Check the throttle position sensor for
continuity.
Refer to "CHECKING AND ADJUSTING
THE THROTTLE POSITION SENSOR" in
chapter 6.
• Is the throttle position sensor OK?
YES
Replace the ignitor
unit.
– +
ELEC
NO
Repair or replace
the wire harness.
NO
Replace the throt-
tle position sensor.
8