Yamaha Waverunner 3 Manual

							7-28
E
–+ELECFUEL CONTROL SYSTEM
FUEL CONTROL SYSTEM
WIRING DIAGRAM
#4
#3
#2
#1
5
7
P/W
P/W
P/W
F
O
B/O
P/G
L/R
B/O
B/O
B/O
B/Y
P/GB/O
B/OR/Y
R/Y
R/Y
R/Y
R/Y
R/Y
Pu/G
Pu/Y
Pu/B
Pu/R
O
OP
R/YR/YR/Y
B/O
B/O
B/Y
B/O
B/GB/G
L/RBrL
Y
R/YR/Y
R B
R/Y
R/Y
B/YB/Y B/Y B/O
B/Y
B/O
B/O
B/O
B/Y
O  P
Y
P
OPu/R
Pu/GPu/B
B/O Pu/G Pu/B
Pu/R Bu/Y
B/YR/Y
B/YB/OP/G
R/Y
Pu/Y
P
B/O
R 
R R 
B/O
B/OB/O
B
BB
R/Y
B
B
L
B
L
B
B
B
63
2 1
B E
E
E
EC
D0 4
R/Y
R/Y R/YR
P
P
O R
R R O
 3  : P/W
 5  : B/Y
 7  : Y
 8  : O
17 :L/B
18 : R/Y
19 : P/G20 : P
21 : B/Y
12 : W/B
23 : Pu/Y
24 : Pu/B
25 : Pu/R
26 : Pu/G
1 2  3  4 5 6   7  8 
Pu/G
R/Y
Pu/Y
R/Y
Pu/B
R/Y
Pu/R
R/Y
R/Y R/Y
B
L
P
B
B
4321
8765
A
B/OL/B
L/B
B/O
B/O
P
P
B
P
B/O
B
P
B/O
PB
PB
8
9
P O
1ECM
2Main and fuel pump relay
3Fuse (20A)
4Battery
5Fuel pump
6Multifunction meter
7Fuel sender
8Thermoswitch (exhaust)
9Thermoswitch (engine)0Engine temperature sensor
ASlant detection switch
BIntake air temperature sensor
CIntake air pressure sensor
DThrottle position sensor
EFuel injector
FOil pressure switch 
						

							7-29
E
–+ELECFUEL CONTROL SYSTEM
WIRING DIAGRAM
#4
#3
#2
#1
5
7
P/W
P/W
P/W
F
O
B/O
P/G
L/R
B/O
B/O
B/O
B/Y
P/GB/O
B/OR/Y
R/Y
R/Y
R/Y
R/Y
R/Y
Pu/G
Pu/Y
Pu/B
Pu/R
O
OP
R/YR/YR/Y
B/O
B/O
B/Y
B/O
B/GB/G
L/RBrL
Y
R/YR/Y
R B
R/Y
R/Y
B/YB/Y B/Y B/O
B/Y
B/O
B/O
B/O
B/Y
O  P
Y
P
OPu/R
Pu/GPu/B
B/O Pu/G Pu/B
Pu/R Bu/Y
B/YR/Y
B/YB/OP/G
R/Y
Pu/Y
P
B/O
R 
R R 
B/O
B/OB/O
B
BB
R/Y
B
B
L
B
L
B
B
B
63
2 1
B E
E
E
EC
D0 4
R/Y
R/Y R/YR
P
P
O R
R R O
 3  : P/W
 5  : B/Y
 7  : Y
 8  : O
17 :L/B
18 : R/Y
19 : P/G20 : P
21 : B/Y
12 : W/B
23 : Pu/Y
24 : Pu/B
25 : Pu/R
26 : Pu/G
1 2  3  4 5 6   7  8 
Pu/G
R/Y
Pu/Y
R/Y
Pu/B
R/Y
Pu/R
R/Y
R/Y R/Y
B
L
P
B
B
4321
8765
A
B/OL/B
L/B
B/O
B/O
P
P
B
P
B/O
B
P
B/O
PB
PB
8
9
P O
B: Black
Br : Brown
G: Green
L: Blue
O : Orange
P: Pink
R: Red
W: White
Y : YellowB/O : Black/orange
B/Y : Black/yellow
G/O : Green/orange
L/B : Blue/black
L/R : Blue/red
P/G : Pink/green
P/W : Pink/white
Pu/B : Purple/black
Pu/G : Purple/greenPu/R : Purple/red
Pu/Y : Purple/yellow
R/Y : Red/yellow
W/B : White/black
W/R : White/red 
						

							7-30
E
–+ELECFUEL CONTROL SYSTEM
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.
NOTE:
After the engine is stopped, the fuel pump will
operate for 10 seconds.
FUEL SENDER
1. Measure:
Fuel sender resistance
Out of specification →
 Replace.
Float 
positionResistance (
Ω)
A91–93
B6–8 
						

							7-31
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 “IGNITION SYSTEM”.
THERMOSWITCH (ENGINE)
Refer to “IGNITION SYSTEM”.
THERMOSWITCH (EXHAUST)
Refer to “IGNITION SYSTEM”.
SLANT DETECTION SWITCH
Refer to “IGNITION SYSTEM”. 
						

							7-32
E
–+ELECSTARTING SYSTEM
STARTING SYSTEM
WIRING DIAGRAM
FREE
PUSHBr
BrFREE
PUSHWBRBr
4321
8765
R/Y718R/Y
L/RBrL
Y
R/YR/Y
B
R/Y
R/Y
Y
R
Br
Br
Br
Br
R
Br
R
B
B
R
43 2 1
87
6
R/Y R/Y
R
P
P
O R
R
R R 
R 
R 
1 2  3  4 5 6   7  8 
B
BB
5
Br
BBB
1ECM
2Main and fuel pump relay
3Fuse (20A)
4Starter relay
5Starter motor
6Battery
7Start switch
8Engine shut-off switchB: Black
Br : Brown
R: Red
Y : Yellow
R/Y : Red/yellow 
						

							7-33
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–+ELECSTARTING SYSTEM
BATTERY
Refer to “ELECTRICAL” in Chapter 3.
WIRING CONNECTIONS
1. Check:
Wiring connections
Poor connections →
 Properly connect.
FUSE
1. Check:
Fuse broken
Broken →
 Replace.
NOTE:
20A fuse is for main relay, engine shut-off
switch and rectifier/regulator.
3A fuse is for multifunction meter and electric
bilge pump.
Fuse rating:
3A, 20A
START SWITCH
1. Check:
Continuity
Out of specification →
 Replace.
Start continuity
(natural color coupler)
Clip PositionLeads
Red Brown
Installed Free
Push
Removed Free
Push 
						

							7-34
E
–+ELECSTARTING SYSTEM
STARTER RELAY
1. Inspect:
Brown lead terminal
Black lead terminal
Loose →
 Tighten.
2. Check:
Starter relay
Faulty →
 Replace.
Checking steps:
Connect the tester leads between the
starter relay terminals as shown.
Connect the brown lead terminal to the
positive battery terminal.
Connect the black lead terminal to the
negative battery terminal.
Check that there is continuity between
the starter relay terminals.
Check that there is no continuity after the
brown or black lead is removed.
Br
B 
						

							7-35
E
–+ELECSTARTER MOTOR
STARTER MOTOR
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART 
*: As requiredStep Procedure/Part name Q’ty Service points
STARTER MOTOR 
DISASSEMBLYFollow the left “Step” for disassembly.
Starter motor Refer to “GENERATOR AND STARTER 
MOTOR” in Chapter 5.
1 O-ring 1
2Bolt 2
3 Starter motor front cover 1
4 O-ring 1
5 Oil seal retainer 1
6 Washer 1
7 Shim * t = 0.2 mm, 0.5 mm
Not reusable
Not reusable 
						

							7-36
E
–+ELECSTARTER MOTOR
EXPLODED DIAGRAM
*: As requiredStep Procedure/Part name Q’ty Service points
8 Starter motor rear cover 1
9 O-ring 1
10 Shim * t = 0.2 mm, 0.8 mm
11 Armature assembly 1
12 Nut/spring washer/washer 1/1/4
13 O-ring 1
14 Brush holder 1
15 Brush spring 4
16 Bolt 1
17 Brush assembly 1
Not reusable
Not reusable 
						

							7-37
E
–+ELECSTARTER MOTOR
EXPLODED DIAGRAM
Step Procedure/Part name Q’ty Service points
18 Spacer 1
19 Holder 1
20 Starter motor yoke 1
Reverse the disassembly steps for 
assembly.