Engine oil YAMAHA VX110 2005 Workshop Manual

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
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7-18
E
–+ELEC
IGNITION COIL
1. Measure:
Primary coil resistance
Out of specification →
Replace.
NOTE:
When measuring a resistance of 10 Ω
or less
using a digital tester, the correct measurement
cannot be obtained because of the tester’s
internal resistance.
Refer to “Low resistance measurement”.
Primary coil resistance:
1.19–1.61
Ω at 20 °C (68 °F)
2. Measure:
Secondary coil resistance
Out of specification →
Replace.
Secondary coil resistance:
8.5–11.5 k
Ω at 20 °C (68 °F)
ENGINE STOP SWITCH
1. Check:
Engine stop switch continuity
Out of specification →
Replace.
Engine stop switch continuity
(black coupler)
Clip PositionLead color
White Black
InstalledFree
Push
RemovedFree
Push
IGNITION SYSTEM
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7-31
E
–+ELECFUEL CONTROL SYSTEM
FUEL CONTROL SYSTEM
WIRING DIAGRAM
10A
10A
3A
30A20A
RR
BBR
B/W
B/O
B/O
B/R
P/R
P/R
P/W
P/W
B/O
L/B
B/WB/R
B/O
P/RP/W
G
O
W
O
OLG
WR/YP/GY/G
B
OL
PB
Pu/RPu/B
Pu/GPu/Y
P/W
R/Y
W/B
Y/WL/R
B
BBP
P
P
BBP
R/Y
B/OL/BB/OL/B
P/G
P/W
B/O
B/O
B/YB/YR/Y
R/Y
R/Y
R/YPu/G
Pu/Y
Pu/B
Pu/RR/Y
R/Y
R/Y
R/Y
R/YY/W
Y/GL/R
O
P
P
O
R
R
L
R
R
B
BLBL
B
B/GPPB
W/BR/YB RW
9 87
E
E E E FGH I3
4
56 2 1
0
A
B
C
D J
K
1Battery
2Fuse (30 A)
3Fuse (20 A)
4Fuse (10 A)
5Fuse (10 A)
6Starter relay
7Main and fuel pump relay
8Electronic control throttle valve
relay9Slant detection switch
0Sensor assembly
(intake air pressure and intake
air temperature)
AEngine temperature sensor
BThermoswitch (engine)
CThermoswitch (exhaust)
DOil pressure switch
EFuel injectorFECM
GThrottle body assembly
HAccelerator position sensor
IElectric fuel pump
JFuel sender
KMultifunction meter
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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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7-47
E
–+ELECOFF THROTTLE STEERING SYSTEM
STEERING SENSOR
1. Check:
Steering sensor
Malfunction → Replace the steering
sensor.
Checking steps:
Turn the handlebar all the way to the left
or right, and then release it.
Install a plastic tie 1 loosely around the
center of the handlebar grip as shown.
Hook a spring gauge 2 onto the plastic
tie.
Hold the spring gauge at a 90° angle
from the handlebar, and then pull the
spring gauge with a force of 10 kgf
(22 lb).
When handlebar
pulledWhen handlebar
not pulled
ON OFF
Check that the following is displayed in
the “Engine Monitor” window of the
Yamaha Diagnostic System.
Use the same procedure to check that
the steering sensor operates correctly
when the handlebar is turned to both the
left and right. Replace the steering sen-
sor if it is a malfunction.
1
2
ECM
Refer to “IGNITION SYSTEM”.
PICKUP COIL
Refer to “IGNITION SYSTEM”.
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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7-51
E
–+ELECINDICATION SYSTEM
OIL PRESSURE SWITCH
1. Measure:
Oil pressure switch continuity
Out of specification → Replace.
Lower unit pressure/vacuum
tester:
YB-35956-A
Vacuum/pressure pump gauge
set:
90890-06756
Oil pressure switch continuity
pressure:
128 kPa (1.28 kgf/cm
2, 18.6 psi) –
167 kPa (1.67 kgf/cm2, 24.2 psi)
MULTIFUNCTION METER
Multifunction meter
1. Check:
Multifunction meter
Cracked meter housing → Replace the
multifunction meter.
Meter is fogged/shows signs of water
intrusion → Replace the multifunction
meter.
MULTIFUNCTION METER REMOVAL
Refer to “ENGINE HATCH COVER” in
Chapter 8.
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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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9-5
E
TRBL
ANLS
TROUBLE ANALYSIS
POWER UNIT
Compression 5
Cylinder head gaskets 5
Cylinder block 5
Crankcase 5
Piston rings 5
Pistons 5
Bearings 5
Valve(s) and valve seat(s) 5
Valve clearance adjusting
pad(s)3
Camshaft(s) 5
Timing chain 5
Oil pump 5
Engine oil 3
Oil filter 3
Oil pressure switch 7
Bearing housing 5
Drive couplings 5
Rubber coupling 5
Pilot water hose 5
Water hose 5
Water passage 5 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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