2005 YAMAHA VX110 sensor

E
–+ELEC
FUEL CONTROL SYSTEM ........................................................................... 7-31
WIRING DIAGRAM ................................................................................. 7-31
ELECTRIC FUEL PUMP ......................................................................... 7-33
FUEL SENDER ....................................................................................... 7-33
FUEL INJECTOR .................................................................................... 7-34
MAIN AND FUEL PUMP RELAY............................................................. 7-34
OIL PRESSURE SWITCH ....................................................................... 7-34
THERMOSWITCH (ENGINE).................................................................. 7-34
THERMOSWITCH (EXHAUST) .............................................................. 7-34
SLANT DETECTION SWITCH ................................................................ 7-34
REMOTE CONTROL UNIT (DELUXE MODEL ONLY) ........................... 7-34
THROTTLE POSITION SENSOR ........................................................... 7-34
ACCELERATOR POSITION SENSOR ................................................... 7-34
STARTING SYSTEM ..................................................................................... 7-35
WIRING DIAGRAM ................................................................................. 7-35
BATTERY ................................................................................................ 7-37
WIRING CONNECTIONS........................................................................ 7-37
FUSES..................................................................................................... 7-37
START SWITCH...................................................................................... 7-37
STARTER RELAY ................................................................................... 7-38
REMOTE CONTROL UNIT (DELUXE MODEL ONLY) ........................... 7-38
THROTTLE POSITION SENSOR ........................................................... 7-38
ACCELERATOR POSITION SENSOR ................................................... 7-38
STARTER MOTOR ........................................................................................ 7-39
EXPLODED DIAGRAM ........................................................................... 7-39
REMOVAL AND INSTALLATION CHART ............................................. 7-39
SERVICE POINTS .................................................................................. 7-41
Armature inspection .......................................................................... 7-41
Brush holder inspection..................................................................... 7-42
Starter motor front cover inspection .................................................. 7-42
CHARGING SYSTEM .................................................................................... 7-43
WIRING DIAGRAM ................................................................................. 7-43
FUSE ....................................................................................................... 7-44
BATTERY ................................................................................................ 7-44
LIGHTING COIL ...................................................................................... 7-44
RECTIFIER/REGULATOR ...................................................................... 7-44
OFF THROTTLE STEERING SYSTEM......................................................... 7-45
WIRING DIAGRAM ................................................................................. 7-45
STEERING SENSOR .............................................................................. 7-47
ECM......................................................................................................... 7-47
PICKUP COIL .......................................................................................... 7-47
THROTTLE POSITION SENSOR ........................................................... 7-47
ACCELERATOR POSITION SENSOR ................................................... 7-47
ProCarManuals.com

E
–+ELEC
INDICATION SYSTEM .................................................................................. 7-48
WIRING DIAGRAM ................................................................................. 7-48
FUSE ....................................................................................................... 7-50
BATTERY ................................................................................................ 7-50
MAIN AND FUEL PUMP RELAY............................................................. 7-50
ECM......................................................................................................... 7-50
ENGINE TEMPERATURE SENSOR ...................................................... 7-50
THERMOSWITCH (ENGINE).................................................................. 7-50
THERMOSWITCH (EXHAUST) .............................................................. 7-50
REMOTE CONTROL UNIT (DELUXE MODEL ONLY) ........................... 7-50
BUZZER .................................................................................................. 7-50
OIL PRESSURE SWITCH ....................................................................... 7-51
MULTIFUNCTION METER...................................................................... 7-51
Multifunction meter ............................................................................ 7-51
MULTIFUNCTION METER REMOVAL ................................................... 7-51
Display function (Sport model only) .................................................. 7-52
Display function (Deluxe model only) ................................................ 7-53
Speedometer display ........................................................................ 7-54
Tachometer display ........................................................................... 7-55
Hour meter display ............................................................................ 7-55
Voltage meter display........................................................................ 7-55
Low oil pressure warning indicator .................................................... 7-55
Fuel level meter display and fuel warning indicator .......................... 7-55
Overheat warning indicator ............................................................... 7-56
Check engine warning indicator ........................................................ 7-56
Diagnostic display ............................................................................. 7-57
REMOTE CONTROL SYSTEM (DELUXE MODEL ONLY) .......................... 7-58
WIRING DIAGRAM ................................................................................. 7-58
REMOTE CONTROL SYSTEM ............................................................... 7-59
Yamaha Security System indicator ................................................... 7-59
Low-rpm mode indicator.................................................................... 7-59
Checking the remote control transmitter ........................................... 7-60
Transmitter registration ..................................................................... 7-62
Replacing of the transmitter battery .................................................. 7-63
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7-1
E
–+ELECELECTRICAL COMPONENTS
ELECTRICAL COMPONENTS
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
0
91
2
3
4
5
6
7
8
1Thermoswitch (engine)
2Fuse box
3Slant detection switch
4Starter motor
5Engine temperature sensor
6Spark plugs and ignition coils
7Cam position sensor
8Battery
9Speed sensor
0Sensor assembly (intake air
pressure and intake air tem-
perature)AOil pressure switch
BFuel injectors
CThermoswitch (exhaust)
DRectifier/regulator
EECM
FThrottle body assembly
GLighting coil and pickup coil
HEngine stop switch, engine
shut-off switch, and start
switch
ISteering sensor
JBuzzerKAccelerator position sensor
LElectric fuel pump
MFuel sender
NMultifunction meter
ORemote control unit (Deluxe
model only)
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7-12
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–+ELECIGNITION SYSTEM
IGNITION SYSTEM
WIRING DIAGRAM
10A
10A
3A
30A20A
WBrBRFREE
PUSHBWFREE
PUSH
Br BrFREE
PUSH
BW
W
BrBrBrBrR
W
B/W
B/O
B/O
B/O
B/R
P/R
P/R
W/B
P/W
P/W
B/O
L/B
B/WB/R
B/OP/W
P/R
W
W
WLR
Y
G
O
O
W
GG
BW
GG
O
OLG
W
Y
W
G/O
W/BR/Y
Y/G
BL
PBWP/W
B/GB/Y
Y/WL/RB/RB/W
B
B
BBP
P
P
BBP
RR
BBR
R/Y
B/OL/BB/OL/B
B/G
G/OB/OG/O
P/W
B/OB/YB/YR/Y
R/Y
R/Y
R/YB/YR/Y
R/Y
B/O
B/RR/Y
R/Y
R/YY/W
Y/GL/R
Y
P
P
O
O R
R
R
BB
BrRB/O
BBr
B/W
Y BrL R B
R
GB
R/YBBr
4
0 98
B
B B
B
H
I JK LM NOQ
PR
3
5
67 2 1
A
A A
A
C
D
E
F
G
1Battery
2Fuse (30 A)
3Fuse (20 A)
4Fuse (3 A)
5Fuse (10 A)
6Fuse (10 A)
7Starter relay
8Main and fuel pump
relay9Electronic control
throttle valve relay
0Slant detection switch
AIgnition coil
BSpark plug
CCam position sensor
DEngine temperature
sensor
EThermoswitch
(engine)FThermoswitch
(exhaust)
GOil pressure switch
HRemote control unit
(Deluxe model only)
IAntenna
(Deluxe model only)
JECM
KRectifier/regulatorLThrottle body assem-
bly
MAccelerator position
sensor
NPickup coil
OLighting coil
PStart switch
QEngine stop switch
REngine shut-off switch
ProCarManuals.com

7-19
E
–+ELECIGNITION SYSTEM
ENGINE TEMPERATURE SENSOR
1. Measure:
Engine temperature sensor resistance
(at the specified temperature)
Out of specification →
Replace.
Engine temperature sensor
resistance:
20 °C (68 °F): 54.2–69.0 k
Ω
100 °C (212 °F): 3.12–3.48 k
Ω
Measurement steps:
Suspend the engine temperature sensor
in a container filled with water.
Place a thermometer in the water.
Slowly heat the water.
Measure the resistance when the speci-
fied temperature is reached.
SENSOR ASSEMBLY
1. Check:
Intake air temperature sensor
Out of specification →
Replace the sen-
sor assembly.
Checking steps:
Measure the ambient temperature.
Connect a computer to the watercraft and
use the Yamaha Diagnostic System to
display the intake air temperature.
If the ambient temperature and the dis-
played intake air temperature differ by
more than ±
5 °C (±
9 °F), replace the
sensor assembly.
ProCarManuals.com

7-24
E
–+ELECIGNITION SYSTEM
THROTTLE POSITION SENSOR
1. Measure:
Throttle position sensor output voltage
Out of specification →
Replace the
throttle body assembly.
Checking steps:
CAUTION:
Do not loosen the throttle stop screw nut
and do not turn the throttle stop screw.
Connect a computer to the watercraft and
use the Yamaha Diagnostic System to
display the “throttle position sensor 1 out-
put voltage”, “throttle valve opening
angle”, and “throttle position sensor 2
output voltage”.
Release the throttle lever to the fully
closed position.
Check the output voltage of throttle posi-
tion sensor 1 and the throttle valve open-
ing angle.
1Throttle position sensor 1
2Throttle position sensor 2
ÈThrottle position sensor output voltage
ÉThrottle valve opening angle
ÊFully closed
ËFully open
NOTE:
The actual throttle position sensor output
voltage and throttle valve opening angle
may vary according to environmental condi-
tions.
Throttle position sensor 1 output
voltage with throttle lever fully
closed:
0.45–0.95 V (reference data)
Throttle valve opening angle with
throttle lever fully closed:
–1.1–9.4° (reference data)
2 ± 0.1 V
0.5 ± 0.05 V 4.65
± 0.05 V
(4.5 V)
(10˚)
É
ÊË È1 2
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7-25
E
–+ELECIGNITION SYSTEM
Squeeze the throttle lever to the fully
open position and hold it.
Check the output voltage of throttle posi-
tion sensor 2 and the throttle valve open-
ing angle.
Throttle position sensor 2 output
voltage with throttle lever fully
open:
4.60–4.70 V
Throttle valve opening angle with
throttle lever fully open:
above 80° (reference data)
Release the throttle lever from the fully
open position to the fully closed position
slowly and check the output voltage of
throttle position sensor 2 and the throttle
valve opening angle.
Hold the throttle lever when the output
voltage of throttle position sensor 2 is
below 4.5 V and the throttle valve open-
ing angle is above 10°.
Calculate the difference of the output
voltage of throttle position sensor 1 and
the output voltage of throttle position sen-
sor 2.
Throttle position sensor 2 output
voltage – throttle position sensor
1 output voltage = 1.9–2.1 V
Example:
If the output voltage of throttle position sen-
sor 1 is 2.5 V and the output voltage of
throttle position sensor 2 is 4.5 V, then
4.5 – 2.5 = 2.0 V
Operate the throttle lever and check that
the output voltage of throttle position sen-
sors 1 and 2 changes continuously.
NOTE:
The maximum output voltage of throttle
position sensor 2 is 4.65 ±
0.05 V at the half
open position.
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7-26
E
–+ELECIGNITION SYSTEM
ACCELERATOR POSITION SENSOR
1. Measure:
Accelerator position sensor output volt-
age
Out of specification →
Replace the
accelerator position sensor.
Checking steps:
Connect a computer to the watercraft and
use the Yamaha Diagnostic System to
display the “accelerator position sensor
1” and “accelerator position sensor 2”.
Release the throttle lever to the fully
closed position.
Check that the accelerator position sen-
sor 1 and 2 output voltage.
NOTE:
The actual accelerator position sensor out-
put voltage and throttle valve opening angle
may vary according to environmental condi-
tions.
Accelerator position sensor 1
output voltage at throttle lever
fully closed position:
0.50–0.90 V
Accelerator position sensor 2
output voltage at throttle lever
fully closed position:
0.35–1.05 V
Throttle valve opening angle at
throttle lever fully closed
position:
2.7–4.8°
Squeeze the throttle lever to the fully
open position and hold it.
Check that the accelerator position sen-
sor 1 and 2 output voltage.
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