Page 385 of 457
7-41
THROTTLE BODIESFI
NOTE:
Increase the vacuum pressure
Fuel pressure is decreased
Decrease the vacuum pressure
Fuel pressure is increased
Faulty Replace the pressure regulator.
EAS00916
CHECKING AND ADJUSTING THE
THROTTLE POSITION SENSOR
Before adjusting the throttle position sensor, the
engine idling speed should be properly ad-
justed.
1. Check:
throttle position sensor
a. Disconnect the throttle position sensor cou-
pler.
b. Remove the throttle position sensor from the
throttle body.
c. Connect the pocket tester (Ω 1k) to the
throttle position sensor.
Positive tester probe blue terminal
1
Negative tester probe
black / blue terminal
2
d. Measure the maximum throttle position sen-
sor resistance.
Out of specification Replace the throttle
position sensor.
Maximum throttle position
sensor resistance
4 6 kΩ at 20C (68F)
(blue – black / blue)
e. Connect the pocket tester (Ω 1k) to the
throttle position sensor.
Positive tester probe yellow terminal
3
Negative tester probe
black / blue terminal
2
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Page 386 of 457
7-42
THROTTLE BODIESFI
NOTE:
Tester positive probe
yellow terminal
Tester negative probe
black / blue terminal
1
2
f. While slowly opening the throttle, check that
the throttle position sensor resistance is with-
in the specified range.
The resistance does not change or it
changes abruptly Replace the throttle
position sensor.
The slot is worn or broken Replace the
throttle position sensor.
Check mainly that the resistance changes grad-
ually when turning the throttle, since the read-
ings (from closed to wide-open throttle) may dif-
fer slightly from those specified.
Throttle position sensor
resistance
0 6 kΩ at 20C (68F)
(yellow – black)
2. Adjust:
throttle position sensor angle
a. Connect the throttle position sensor coupler
to the wire harness.
b. Connect the digital circuit tester to the throttle
position sensor.
Digital circuit tester
90890-03174
c. Measure the throttle position sensor voltage.
d. Adjust the throttle position sensor angle so
the measured voltage is within the specified
range.
Throttle position sensor voltage
0.63 0.73 V
(yellow – black / blue)
e. After adjusting the throttle position sensor
angle, tighten the throttle position sensor
screws.
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Page 387 of 457
7-43
THROTTLE BODIESFI
NOTE:
CHECKING AND ADJUSTING THE
SUB-THROTTLE POSITION SENSOR
1. Check:
sub-throttle position sensor
a. Disconnect the sub-throttle position sensor
coupler.
b. Remove the sub-throttle position sensor
from the sub-throttle servo motor.
c. Connect the pocket tester (Ω 1k) to the
sub-throttle position sensor.
Positive tester probe blue terminal
1
Negative tester probe
black / blue terminal
2
d. Measure the maximum sub-throttle position
sensor resistance.
Out of specification Replace the sub-
throttle position sensor.
Maximum sub-throttle position
sensor resistance
4 6 kΩ at 20C (68F)
(blue – black / blue)
e. Connect the pocket tester (Ω 1k) to the
sub-throttle position sensor.
Positive tester probe
green / yellow terminal
3
Negative tester probe
black / blue terminal
2
f. While slowly opening the sub-throttle worm
nut, check that the sub-throttle position sen-
sor resistance is within the specified range.
The resistance does not change or it changes
abruptly Replace the sub-throttle position
sensor.
Check mainly that the resistance changes grad-
ually when turning the sub-throttle worm nut,
since the readings (from closed to wide-open
sub-throttle) may differ slightly from those spe-
cified.
Sub-throttle position sensor
resistance
0 6 kΩ at 20C (68F)
(black / blue – green / yellow)
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Page 389 of 457
7-45
A
THROTTLE BODIESFI
NOTE:
NOTE:
b. After performing the step a, move the sub-
throttle position sensor to adjust to be in a
range from 0.97 to 1.07 V
Sub-throttle position sensor
voltage
0.97 1.07 V
(green / yellow – blue)
After setting up the sub-throttle position sen-
sor, check that the sub-throttle position sensor
output voltage is 0.4 V or more with the nut of
worm shaft turned to the full close side until it
stops.
When the sub-throttle position sensor output
voltage is 0.4 V or more, check that the sub-
throttle position sensor output voltage is 4.6 V
or less with the nut of worm shaft turned to the
full open side until it stops.
CHECKING AND ADJUSTING THE THERMO
WA X
1. Check:
thermo wax
1
Damege Replace the thermo wax.
2. Adjust:
thermo wax the end face distance
a
a. Before adjusting the distance, push the rod
b in order to be fitted in several times by
hand.
b. Measure the outside air temperature, and
adjust the distance
a by turning the adjust-
ing screw
2. Refer to the thermo wax toler-
ance table based on the measured outside
air temperature for correct adjustment.
Setup tolerance of the longitudinal axis should
be 0.2 mm ( 0.008 in).
After adjusting the thermo wax, check that the
first idling is released at the coolant tempera-
ture around 60C (140F) by idling.
If the first idling is not released around 60C
(140F), make sure to set it again. (When the
coolant temperature is low, adjust the distance
between the end faces longer or adjust it short-
er when the coolant temperature is high.)
In case of turning the adjusting bolt two-third
turn, the temperature varies about 10C
(50F).
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8-3
CHECKING SWITCH CONTINUITYELEC
CAUTION:
NOTE:
NOTE:
EAS00730
CHECKING SWITCH CONTINUITY
Check each switch for continuity with the pocket
tester. If the continuity reading is incorrect,
check the wiring connections and if necessary,
replace the switch.
Never insert the tester probes into the cou-
pler terminal slots. Always insert the probes
from the opposite end of the coupler
1 tak-
ing care not to loosen or damage the leads.
Pocket tester
90890-03112, YU-3112
Before checking for continuity, set the pocket
tester to “0” and to the “Ω 1” range.
When checking for continuity, switch back and
forth between the switch positions a few times.
The terminal connections for switches (e.g.,
main switch, engine stop switch) are shown in
an illustration similar to the one on the left.
The switch positions
a are shown in the far left
column and the switch lead colors
b are shown
in the top row in the switch illustration.
“
” indicates a continuity of electricity
between switch terminals (i.e., a closed circuit
at the respective switch position).
The example illustration on the left shows
that:
There is continuity between red and brown / red
when the switch is set to “P”.
There is continuity between red, brown / blue
and brown / red when the switch is set to “ON”.
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8-13
IGNITION SYSTEMELEC
12. Starting circuit cut-off relay (diode)
Disconnect the starting circuit cut-off relay
coupler from the wire harness.
Connect the pocket tester (Ω 1) to the
starting circuit cut-off relay coupler as
shown.
Check the starting circuit cut-off relay for
continuity.
Positive tester probe
blue / yellow
Negative tester probe
sky blue
1
2
EAS00753
Positive tester probe
blue / yellow
Negative tester probe
blue / black Continuity
1
3
Positive tester probe
sky blue
Negative tester probe
blue / yellow
2
1
Positive tester probe
blue / black
Negative tester probe
blue / yellow No
continuity
3
1
YESNO
Replace the starting
circuit cut-off relay. When you switch the positive and negative
tester probes, the readings in the above chart
will be reversed.
Are the tester readings correct?
NOTE:
13. Lean angle cut-off switch
Check the lean angle cut-off switch.
Refer to “FUEL INJECTION SYSTEM” in
chapter 7.
Is the lean angle cut-off switch OK?
YESNO
Replace the lean
angle cut-off switch.
EAS00754
14. Wiring
Check the entire ignition system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
Is the ignition system’s wiring properly con-
nected and without defects?
YESNO
Properly connect or
repair the ignition
system’s wiring.
Replace the ECU.
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Page 410 of 457
8-17
4. Starting circuit cut-off relay
Disconnect the starting circuit cut-off relay
coupler from the wire harness.
Connect the pocket tester (Ω 1) and bat-
tery (12 V) to the starting circuit cut-off relay
coupler as shown.
YESNO
Replace the starting
circuit cut-off relay.
Positive tester probe blue / white
Negative tester probe blue / white
Does the starting circuit cut-off relay have
continuity between blue / white and
blue / white ?
1
2
3
4
EAS00759
Positive battery terminal red / black
Negative battery terminal
black / yellow
EAS00761
5. Starter relay
Disconnect the starter relay coupler from the
coupler.
Connect the pocket tester (Ω 1) and battery
(12 V) to the starter relay coupler as shown.
YESNO
Replace the starter
relay.
Positive battery terminal blue / white
Negative battery terminal red / white
Positive tester probe red
Negative tester probe black
1
2
3
4
Does the starter relay have continuity be-
tween red and black?
EAS00749
6. Main switch
Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the main switch OK?
YESNO
Replace the main
switch.
EAS00750
7. Engine stop switch
Check the engine stop switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the engine stop switch OK?
YESNO
Replace the right
handlebar switch.
EAS00751
8. Neutral switch
Check the neutral switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the neutral switch OK?
YESNO
Replace the neutral
switch.
3
4
ELECTRIC STARTING SYSTEMELEC
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8-32
LIGHTING SYSTEMELEC
YESNO 1. License plate light bulb and socket
Check the license plate light bulb and socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
Are the license plate light bulb and socket
OK?
Replace the license
plate light bulb, sock-
et or both.
EAS007922. The license plate light fails to come on.
YESNO 2. Voltage
Connect the pocket tester (DC 20 V) to the
license plate light coupler (wire harness light
side) as shown.
The wiring circuit
from the main switch
to the license plate
light coupler is faulty
and must be re-
paired. Positive tester probe blue / red
Negative tester probe black
1
2
Turn the main switch to “ON”.
Measure the voltage (DC 12 V) of blue / red
on the license plate light coupler (wire
harness side).
Is the voltage within specification?
1
This circuit is OK.
EAS00790
3. The tail / brake light fails to come on.
YESNO 1. Voltage
Connect the pocket tester (DC 20 V) to the
tail / brake light coupler (wire harness side)
as shown.
Wiring circuit from
the main switch to
the tail / brake light
coupler is faulty and
must be repaired. Positive tester probe blue / red
Negative tester probe black
1
2
Turn the main switch to “ON”.
Measure the voltage (DC 12 V) of blue / red
on the tail / brake light coupler (wire har-
ness side).
Is the voltage within specification?
1
This circuit is OK.
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