2005 YAMAHA VX110 light

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

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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7-11
E
–+ELECELECTRICAL ANALYSIS
Peak voltage adapter
NOTE:
Throughout this chapter the part numbers of
the specified peak voltage adapters have
been omitted. Refer to the following part
numbers.
The peak voltage adapter should be used
with a digital tester.
When measuring the peak voltage, connect
the peak voltage adapter to the digital circuit
tester and switch the selector to the DC volt-
age mode.
NOTE:
Make sure that the adapter leads are prop-
erly installed in the digital circuit tester.
Make sure that the positive pin (the “+” mark
facing up as shown) on the adapter is
installed into the positive terminal of the
tester.
The test harness is needed for the following
tests.
È Voltage measurement
É Peak voltage measurement
Test harness
NOTE:
If the lighting coil and pickup coil(s) are mea-
sured unloaded, disconnect the test harness
on the output side coupler.
Peak voltage adapter:
YU-39991
Peak voltage adapter B:
90890-03172
Checking steps:
Disconnect the coupler connections.
Connect the test harness between the
couplers.
Connect the tester terminals to the termi-
nals which are being checked.
Run the engine and observe the mea-
surement.È
É
ProCarManuals.com

7-12
E
–+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

7-16
E
–+ELECIGNITION SYSTEM
2. Measure:
Pickup coil output peak voltage
Below specification →
Replace the
pickup coil.
Above specification →
Replace the
ECM.
NOTE:
To crank the engine, connect the engine shut-
off cord (lanyard) to the engine shut-off switch,
and then press the start switch and engine
stop switch simultaneously.
Test harness (3 pins):
New: YB-06877
Current: YB-06777
Test harness HM090-3 (3 pins):
New: 90890-06877
Current: 90890-06777
Pickup coil output peak voltage:
White/black (W/B) –
Black/orange (B/O)
r/minUnloaded Loaded
Cranking 2,000 3,500
V 8.0 6.9 19.4 25.1
3. Measure:
Lighting coil output peak voltage
Below specification →
Replace the light-
ing coil.
Test harness (3 pins):
New: YB-06870
Current: YB-06770
Test harness SMT250-3 (3 pins):
New: 90890-06870
Current: 90890-06770
Lighting coil output peak voltage:
Green (G) – Green (G)
r/minUnloaded
Cranking 2,000 3,500
V 7.8 24.5 41.6
ProCarManuals.com

7-43
E
–+ELECCHARGING SYSTEM
CHARGING SYSTEM
WIRING DIAGRAM
10A
10A
3A
30A20A
RR
BBRGGGGGG
RGGGB
R
B
4 5
32 1
1Battery
2Fuse (30 A)
3Fuse (20 A)
4Rectifier/regulator
5Lighting coilB: Black
G : Green
R: Red
ProCarManuals.com

7-44
E
–+ELECCHARGING SYSTEM
FUSE
Refer to “STARTING SYSTEM”.
BATTERY
Refer to “ELECTRICAL” in Chapter 3.
LIGHTING COIL
Refer to “IGNITION SYSTEM”.
RECTIFIER/REGULATOR
Refer to “IGNITION SYSTEM”.
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7-56
E
–+ELECINDICATION SYSTEM
Overheat warning indicator
1. Check:
Overheat warning indicator
Does not come on → Replace the multi-
function meter.
Checking steps:
Start the engine.
Disconnect the thermoswitch (engine)
connector 1 (blue), engine temperature
sensor connector 2 (black), or ther-
moswitch (exhaust) 3 connector.
Connect the jumper lead to the female
terminal of the disconnected connector.
Check that the multifunction meter over-
heat warning indicator blinks, then comes
on. The buzzer also begins to sound
intermittently, then sounds continuously.
3
12
Check engine warning indicator
1. Check:
Check engine warning indicator
Does not come on → Replace the multi-
function meter.
Checking steps:
Start the engine.
Disconnect the coupler of a sensor (e.g.,
engine temperature sensor) that normally
activates the check engine warning indi-
cator when a malfunction occurs.
Check that the warning light and check
engine warning indicator begin to blink
and the buzzer sounds intermittently.
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