2005 YAMAHA VX110 fuel pressure

7-33
E
–+ELECFUEL CONTROL SYSTEM
ELECTRIC FUEL PUMP
1. Check:
Fuel pump operating sound
Fuel pump does not sound →
Measure
the fuel pressure.
Refer to “FUEL INJECTION SYSTEM”
in Chapter 4.
FUEL SENDER
1. Measure:
Fuel sender resistance
Out of specification →
Replace.
Float
positionResistance (
Ω)
A 133.5–136.5
B5–7
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7-34
E
–+ELECFUEL CONTROL SYSTEM
FUEL INJECTOR
Refer to “FUEL INJECTION SYSTEM”
in Chapter 4.
MAIN AND FUEL PUMP RELAY
Refer to “IGNITION SYSTEM”.
OIL PRESSURE SWITCH
Refer to “INDICATION SYSTEM”.
THERMOSWITCH (ENGINE)
Refer to “IGNITION SYSTEM”.
THERMOSWITCH (EXHAUST)
Refer to “IGNITION SYSTEM”.
SLANT DETECTION SWITCH
Refer to “IGNITION SYSTEM”.
REMOTE CONTROL UNIT
(DELUXE MODEL ONLY)
Refer to “REMOTE CONTROL SYS-
TEM (DELUXE MODEL ONLY)”.
THROTTLE POSITION SENSOR
Refer to “IGNITION SYSTEM”.
ACCELERATOR POSITION SENSOR
Refer to “IGNITION SYSTEM”.
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7-48
E
–+ELECINDICATION SYSTEM
INDICATION SYSTEM
WIRING DIAGRAM
10A
10A
3A
30A20A
RR
BBR
BBr
BBr
B/OW/B
B/O
B/O
WR
Y
G
O
BW
Y
W
G/OW/B
Y/GR/Y
B
PB
Pu/RPu/B
Pu/GPu/Y
P/W
B/G
R/Y
W/B
B/Y
Y/WL/R
B/RB/W
B
B
BBP
P
PBBP
R/Y
B/G
G/OB/OG/O
P/W
B/OB/YB/YR/Y
R/Y
R/Y
B/LL/YL/B
R/YPu/G
Pu/Y
Pu/B
Pu/RR/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
B
G
BR
Y
B/YR/W
BRW
P
PB
B/LL/R
L/RL/B
B/WR
BW/BR/YL/RL/YL/B Gy B/G
YB/YR/Y
98
A
A A
A
G
G GG
H IJ K4 3
5
67 2 1
0
0 0
0
B
C
D
E
F LM
N
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
0Ignition coil
ASpark plug
BCam position sensor
CEngine temperature sensor
DThermoswitch (engine)
EThermoswitch (exhaust)
FOil pressure switchGFuel injector
HRemote control unit
(Deluxe model only)
IECM
JPickup coil
KBuzzer
LFuel sender
MSpeed sensor
NMultifunction meter
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7-55
E
–+ELECINDICATION SYSTEM
Tachometer display
1. Check:
Tachometer display
Does not display → Check the engine
speed using the “Engine monitor” of the
Yamaha Diagnostic System.
Replace the multifunction meter.
Hour meter display
1. Check:
Hour meter display
Does not display → Replace the multi-
function meter.
Voltage meter display
1. Check:
Voltage meter display
Does not display → Check the battery
voltage using the “Engine monitor” of
the Yamaha Diagnostic System.
Replace the multifunction meter.
Low oil pressure warning indicator
1. Check:
Low oil pressure warning indicator
Does not come on → Check the oil pres-
sure switch using the “Engine monitor”
of the Yamaha Diagnostic System.
Replace the multifunction meter.
Fuel level meter display and fuel warning
indicator
1. Check:
Fuel level meter display and fuel warn-
ing indicator
Do not display → Measure the fuel
sender resistance.
If the fuel sender resistance is within
specification, replace the multifunction
meter.
2. Measure:
Fuel sender resistance
Refer to “FUEL CONTROL SYSTEM”.
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9-4
E
TRBL
ANLS
TROUBLE ANALYSIS
TROUBLE ANALYSIS
NOTE:
Before consulting the “TROUBLE ANALYSIS CHART,” check the following items.
1. Check that the battery is charged and that its specified gravity is within specification.
2. Check that there are no incorrect wiring connections.
3. Check that all wiring connections are properly secured and that they are not rusty.
4. Check that the engine shut-off cord (lanyard) is connect to the engine shut-off switch.
5. Check that fuel is reaching the fuel rail.
TROUBLE ANALYSIS CHART
Trouble mode Check elements
ENGINE WILL NOT START
HARD STARTING
ROUGH IDLING
HIGH IDLING
ENGINE STALLS
POOR ACCELERATION
ENGINE WILL NOT STOP
POOR PERFORMANCE
LIMITED ENGINE SPEED
OVERHEATING
LOW OIL PRESSURE
LOOSE STEERING
BILGE INCREASE
IRREGULAR WARNING INDICATION
POOR BATTERY CHARGING
Relative partReference
chapter
FUEL SYSTEM
Fuel tank 4
Fuel tank breather hose 4
Fuel hose 4
Fuel filter 4
Fuel pump 4
Fuel rail 4
Fuel injectors 4
Trolling speed 3
Air filter 3
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9-6
E
TRBL
ANLS
TROUBLE ANALYSIS
JET PUMP UNIT
Duct 6
Impeller 6
Intake grate 6
Bearings 6
Water inlet hose 6
Bilge hose 6
Bilge strainer 3
Bilge hose joint 6
ELECTRICAL
Ignition system, fuel control system
Pickup coils 7
ECM 7
Ignition coils 7
Slant detection switch 7
Engine stop switch 7
Engine shut-off switch 7
Spark plugs 3
Main and fuel pump relay 7
Electronic control throttle
valve relay7
Thermoswitch 7
Sensor assembly 7
Engine temperature
sensor7
Throttle body assembly
(throttle position sensor)7
Accelerator position
sensor7
Cam position sensor 7 Trouble mode Check elements
ENGINE WILL NOT START
HARD STARTING
ROUGH IDLING
HIGH IDLING
ENGINE STALLS
POOR ACCELERATION
ENGINE WILL NOT STOP
POOR PERFORMANCE
LIMITED ENGINE SPEED
OVERHEATING
LOW OIL PRESSURE
LOOSE STEERING
BILGE INCREASE
IRREGULAR WARNING INDICATION
POOR BATTERY CHARGING
Relative partReference
chapter
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WIRING DIAGRAM
VX110 Sport
1Battery
2Starter motor
3Fuse (30 A)
4Fuse (20 A)
5Fuse (3 A)
6Fuse (10 A)
7Fuse (10 A)
8Starter relay
9Main and fuel pump relay
0Electronic control throttle valve relay
ASlant detection switch
BIgnition coil
CSpark plug
DCam position sensor
ESensor assembly
(intake air pressure and intake air tempera-
ture)
FEngine temperature sensor
GThermoswitch (engine)
HThermoswitch (exhaust)
IOil pressure switch
JFuel injector
KECM
LRectifier/regulator
MThrottle body assembly
NAccelerator position sensor
OPickup coil
PLighting coil
QBuzzer
RElectric fuel pump
SSteering sensor
TFuel sender
USpeed sensor
VMultifunction meter
WStart switch
XEngine stop switch
YEngine shut-off switch
ÈTo tachometerColor code
B: Black
Br : Brown
G: Green
Gy : Gray
L: Blue
O : Orange
P: Pink
R: Red
W: White
Y : Yellow
B/G : Black/green
B/O : Black/orange
B/R : Black/red
B/W : Black/white
B/Y : Black/yellow
G/B : Green/black
G/O : Green/orange
G/R : Green/red
G/Y : Green/yellow
L/R : Blue/red
P/G : Pink/green
P/W : Pink/white
Pu/B : Purple/black
Pu/G : Purple/green
Pu/R : Purple/red
Pu/Y : Purple/yellow
R/W : Red/white
R/Y : Red/yellow
W/B : White/black
W/L : White/blue
W/R : White/red
Y/G : Yellow/green
Y/W : Yellow/white
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WIRING DIAGRAM
VX110 Deluxe
1Battery
2Starter motor
3Fuse (30 A)
4Fuse (20 A)
5Fuse (3 A)
6Fuse (10 A)
7Fuse (10 A)
8Starter relay
9Main and fuel pump relay
0Electronic control throttle valve relay
ASlant detection switch
BIgnition coil
CSpark plug
DCam position sensor
ESensor assembly
(intake air pressure and intake air tempera-
ture)
FEngine temperature sensor
GThermoswitch (engine)
HThermoswitch (exhaust)
IOil pressure switch
JFuel injector
KRemote control unit
LAntenna
MECM
NRectifier/regulator
OThrottle body assembly
PAccelerator position sensor
QPickup coil
RLighting coil
SBuzzer
TElectric fuel pump
USteering sensor
VFuel sender
WSpeed sensor
XMultifunction meter
YStart switch
ZEngine stop switch
[Engine shut-off switch
ÈTo entry box
ÉTo tachometerColor code
B: Black
Br : Brown
G: Green
Gy : Gray
L: Blue
O : Orange
P: Pink
R: Red
W: White
Y : Yellow
B/G : Black/green
B/O : Black/orange
B/R : Black/red
B/W : Black/white
B/Y : Black/yellow
G/B : Green/black
G/O : Green/orange
G/R : Green/red
G/Y : Green/yellow
L/B : Blue/black
L/R : Blue/red
L/Y : Blue/yellow
P/G : Pink/green
P/W : Pink/white
Pu/B : Purple/black
Pu/G : Purple/green
Pu/R : Purple/red
Pu/Y : Purple/yellow
R/W : Red/white
R/Y : Red/yellow
W/B : White/black
W/L : White/blue
W/R : White/red
Y/G : Yellow/green
Y/W : Yellow/white
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