Throttle Position Sensor; Self-Diagnosis - Yamaha YZF-R1 98 Service Manual

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, rem ove the
follow ing part(-s):
1) rider seat
2) fuel tank
3) air filter case
• Troubleshoot w ith the follow ing spe-
cial tool(-s).
Pocket tester
90890-03112
EB812020
1. Throttle position sensor
CIRCUIT DIAGRAM
B/ L B/ R B
G/ Y Sb B/ Y R/ W
Gy W
W/ R Y
B/ R L Y/ L B/ R
B/ Y B/ L W/ B B/ Y
E
B/ L
F
L
Y
L Y B/ L
B/ L
F Throttle position sensor
G Ignitor unit
B
R/ B R/ B
Y/ B O
R/ W
L/ R Gy
B
O
L
L/ R
G/ Y
B/ Y
Gy
B/ R
G
L L
W/ R
B/ L
Y Gy
B Y/ B Sb
W B

SELF-DIAGNOSIS

1.Wire harness
• Check the w ire harness for continuity.
Refer to " CIRCUIT DIAGRAM " .
• Is the w ire harness OK?
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?
Replace the ignitor
unit.
R/ B
B
O
R/ B
B
Gy
Gy
B/ L
8 - 58
ELEC
YES
Repair or
the w ire harness.
YES
Replace the throt-
tle position sensor.
– +
NO
replace
NO