Yamaha 2005 BT1100 Supplementary Service Manual page 72

EASB0044
TROUBLESHOOTING
The tachometer displays the throttle posi-
tion sensor/speed sensor error code.
Check:
1. Throttle position sensor
2. Speed sensor
3. Ignition coil N. 1 and 2
4. Fuel-cut solenoid N. 1 and 2
NOTE:
• Before troubleshooting, remove the following
part(-s):
1) Seat
2) Side cover (left)
3) Fuel tank (lift)
4) Air filter case
• Troubleshoot with the following special tool(-s).
Pocket tester
90890-03112
EAS00836
1. Throttle position sensor
CIRCUIT DIAGRAM
Lg LR YB Y L Gy1 LY RB RW B Br Or
YL WB
9
B LB
LB
B
(BLACK)
(BLACK)
L L Y
Y
B
BL
13
0 Ignitor unit
e Throttle position sensor
W RL BL G Gy2
Sb
Or
10
Gy2
LR
PUMP
Gy1
PU
L
L
VCC
Y
Y Sb
TPS NS
B
BL
Br
SL1
S.GND
G
SL2
LY
SS
WB
HD
RL
+B
SP RPM GND
SELF-DIAGNOSIS DEVICE
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 conti-
nuity.
Refer to "CHECKING AND ADJUSTING THE
THROTTLE
Chapter 5.
• Is the throttle position sensor OK?
YES
Replace the ignitor
unit.
64
ELEC
Repair or replace the
wire harness.
POSITION SENSOR"
Replace the throttle
position sensor.
NO
in
NO