Yamaha Waverunner 3 Manual

E
–+ELEC
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CHAPTER  7
ELECTRICAL SYSTEM
ELECTRICAL COMPONENTS........................................................................ 7-1
ELECTRICAL BOX AND IGNITION COIL BOX ............................................. 7-2
EXPLODED DIAGRAM ............................................................................. 7-2
REMOVAL AND INSTALLATION CHART ................................................ 7-2
ELECTRICAL ANALYSIS...

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–+ELEC
FUEL CONTROL SYSTEM ........................................................................... 7-28
WIRING DIAGRAM ................................................................................. 7-28
FUEL PUMP ............................................................................................ 7-30
FUEL SENDER ....................................................................................... 7-30
FUEL INJECTOR...

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–+ELEC
INDICATION SYSTEM .................................................................................. 7-44
WIRING DIAGRAM ................................................................................. 7-44
FUSE ....................................................................................................... 7-45
BATTERY ................................................................................................ 7-45
LIGHTING COIL...

7-1
E
–+ELECELECTRICAL COMPONENTS
ELECTRICAL COMPONENTS
L
K
J
I
H
G
F
E
D
C
B
A
0
9
87 6 5 4 3 2
1
1Thermoswitch (engine)
2Starter motor
3Engine temperature sensor
4Spark plugs
5Ignition coils
6Electrical box
7Battery
8Speed sensor
9Electric bilge pump0Cam position sensor
AFuel injectors
BThermoswitch (exhaust)
COil pressure switch
DIntake air pressure sensor
EIntake air temperature sensor
FThrottle position sensor
GLighting coil and pulser coil
HEngine stop switch, engine
shut-off switch and start...

7-2
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–+ELECELECTRICAL BOX AND IGNITION COIL BOX
ELECTRICAL BOX AND IGNITION COIL BOX
EXPLODED DIAGRAM 
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
ELECTRICAL BOX REMOVAL
Follow the left “Step” for removal.
1 Battery negative lead 1
2 Battery positive lead 1
3 Clip/breather hose 1/1
4 Band 2
5 Battery 1
6 Damper 1
7Bolt 2
8Bolt 2
AA
AA
22
2311
14
13 121516
21
20
19
23 23
23
23
2317
1823
101 9 7
86 5
2 3 4
(VENT)
LT
572
LT
LT
271
LT
LT
572
LT
AA
LT
572
LT
E
7.6 N •
 m (0.76...

7-3
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–+ELECELECTRICAL BOX AND IGNITION COIL BOX
EXPLODED DIAGRAM 
Step Procedure/Part name Q’ty Service points
9 Battery box 1
10 Spacer 2
11 Bolt 4
12 Screw 4
13 Terminal cover 1
14 Gasket 1
15 Screw 1
16 Starter motor lead 1
17 Bolt 3
18 Cover 1
AA
AA
22
2311
14
13 121516
21
20
19
23 23
23
23
2317
1823
101 9 7
86 5
2 3 4
(VENT)
LT
572
LT
LT
271
LT
LT
572
LT
AA
LT
572
LT
E
7.6 N •
 m (0.76 kgf • m, 5.5 ft • Ib)
6 × 12 mm
7.6 N •
 m (0.76 kgf • m, 5.5 ft • Ib)
6 × 16 mm
7.6 N •
 m (0.76 kgf • m, 5.5 ft...

7-4
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–+ELECELECTRICAL BOX AND IGNITION COIL BOX
EXPLODED DIAGRAM 
Step Procedure/Part name Q’ty Service points
19 Gasket 1
20 Bolt 2
21 Ground lead 2
22 Holder 1
23 Coupler 15
NOTE:
Disconnect all couplers.
Reverse the removal steps for installation.
AA
AA
22
2311
14
13 121516
21
20
19
23 23
23
23
2317
1823
101 9 7
86 5
2 3 4
(VENT)
LT
572
LT
LT
271
LT
LT
572
LT
AA
LT
572
LT
E
7.6 N •
 m (0.76 kgf • m, 5.5 ft • Ib)
6 × 12 mm
7.6 N •
 m (0.76 kgf • m, 5.5 ft • Ib)
6 × 16 mm
7.6 N •
 m (0.76 kgf • m, 5.5...

7-5
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–+ELECELECTRICAL BOX AND IGNITION COIL BOX
EXPLODED DIAGRAM 
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
ELECTRICAL BOX 
DISASSEMBLYFollow the left “Step” for disassembly.
1 Tapping screw 18
2 Cover 1
3Gasket 1
4Clamp 3
5Screw 4
6 Terminal cover 1
7Gasket 1
8Screw 2
2
31
24
25
232221
19
16
20
18
1712
13
14
15
9
11
4 7
6
5810 27 26
6 × 20 mm
3.9 N • m (0.39 kgf 
• m, 2.8 ft 
• Ib)
6 × 30 mm
3.9 N • m (0.39 kgf 
• m, 2.8 ft 
• Ib)
4.9 N •
 m (0.49 kgf • m, 3.5 ft •...

7-6
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–+ELECELECTRICAL BOX AND IGNITION COIL BOX
EXPLODED DIAGRAM 
Step Procedure/Part name Q’ty Service points
9 Battery positive lead 1
10 Starter motor lead 1
11 Wire harness 1
12 Tapping screw 1
13 Fuse holder stay 1
14 Screw 1
15 Starter relay 1
16 Clamp 2
17 Tapping screw/washer 4/4
18 ECM 1
2
31
24
25
232221
19
16
20
18
1712
13
14
15
9
11
4 7
6
5810 27 26
6 × 20 mm
3.9 N • m (0.39 kgf 
• m, 2.8 ft 
• Ib)
6 × 30 mm
3.9 N • m (0.39 kgf 
• m, 2.8 ft 
• Ib)
4.9 N •
 m (0.49 kgf • m, 3.5 ft • Ib)
5 ×...

7-7
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–+ELECELECTRICAL BOX AND IGNITION COIL BOX
EXPLODED DIAGRAM 
Step Procedure/Part name Q’ty Service points
19 Tapping screw 1
20 Bracket 1
21 Joint connector 2
22 Tapping screw 2
23 Slant detection switch 1
24 Tapping screw 1
25 Main and fuel pump relay 1
26 Tapping screw 2
27 Rectifier/regulator 1
Reverse the disassembly steps for 
assembly.
2
31
24
25
232221
19
16
20
18
1712
13
14
15
9
11
4 7
6
5810 27 26
6 × 20 mm
3.9 N • m (0.39 kgf 
• m, 2.8 ft 
• Ib)
6 × 30 mm
3.9 N • m (0.39 kgf 
• m, 2.8 ft...