2016 YAMAHA WR 450F diagram

FUEL PUMP SYSTEM
9-56
EAS2GC1379
FUEL PUMP SYSTEM
EAS2GC1380CIRCUIT DIAGRAM
ONOFF
ONOFF
BBB
BBB
RRR
RRR/L
Br Br BrBr Br
(Gy)
(Gy)B/LGyWW W BGy
BR
WW W
BR
R,R/Y
G
R
Y/B
R,R/W
Br
RL/R
(B)R/YR/WBr/WL/G
Br/W,BrL/W
(B)
(B) Br BrL/Y
Y/R
G/YBrBB
BrBrL/YY/W
(B) (B)B BGG/Y
RR/L
RLg
W/B
(B)
BGyBr RW/BB/LLYP
G/WB/Y
R/BLgG/YW
Br/W
OL/RY/BB/OL/BSbY/R
L/Y P/L
Y/G
(Gy)R/L R/BR/LB/Y
R/WR/L
R/W,BrP/L
R/L R/L
(B)
(B) (B)
(L)
(L) (B)
BR/LLBR/L R/L R/L R/L R/L B/L B/L B/L B/L B/L B/L B/LLLLLBBBB
Br Br Br Br
B/LBr/W
B/LG/WLYB/L
B/LPLB/LY/GL
(B)
(B)B/OBBBSbW/B
Sb
SbG/B
L/G,L/WL/BBrG/BG/BB
BB
(B)
(B)L/BBBB
Br Br
Br BrBr
BB
LY
(B)
(B)
(B)
(B)
(B)
GB
ChDg YB
BRW
BrRBW
B/WRW
Ch DgYBBrR/WBW
R
O
OR/L
BB
B
B
BBBBBB
RRRRRR/L
BrBrBrBrBr
Br
Br
BrBrBrBrR/LR/LR/LR/LR/L
B
LLLP
PL
Y
Y
RR
Br
R/LR/L
R/L
P/L
P/L
R/L
R/L
R/LR/B
R/B
L/RL/Y
L/Y
Y/R
Y/R
G/Y
G/YG/Y
G/Y
B/Y
B/Y
R/LB/LB/L
B/LB/LB/LY/G
Y/GB/L
B/OL/BY/BW/B
W/B
G/B
L/B
W/BW/B
L/BL/BL/GL/W
L/W
L/R
Br/W
Br/W
R/W
R/W
R/Y
R/Y
G/BG/B
G/B
B/O
B/LB/LB/LB/LB/LB/LB/L
G/W
G/W
Br/W
Br/W
R/WR/WBr
O
O
RGy
LLLLBBBB
B
B
B
B
BB
B
B
RRWW
Y
Y
Dg
Dg
Ch
Ch
RW
BrBrBrBr
Br
B
W
Sb
SbSb
SbBr
Br
B
Br
Lg
Lg
R/L
R
R
RR
Gy
BB
WWWWWW
R
RRGGBB
B
Y/B
BB
Br
Br
Br
L/G
B/L
B/WB/W
OR
OR
RBBB
B
BBBBB

FUEL PUMP SYSTEM
9-58
EAS2GC1381TROUBLESHOOTING
The fuel pump fails to operate.
TIP
Before troubleshooting, remove the following part(s):
1. Seat
2. Side cover (left/right)
3. Air scoop (left/right)
4. Fuel tank1. Check the fuse. Refer to “CHECKING THE FUSES”
on page 9-68. NG

Replace the fuse(s).
OK 
2. Check the battery. Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 9-69. NG

• Clean the battery terminals.
• Recharge or replace the battery.
OK 
3. Check the engine stop switch. Refer to “CHECKING THE
SWITCHES” on page 9-64. NG

Replace the engine stop switch.
OK 
4. Check fuel pressure. Refer to “CHECKING THE FUEL
PRESSURE” on page 8-5. NG

Replace the fuel pump.
OK 
5. Check the fuel pump system wire harness connections.
Refer to “CIRCUIT DIAGRAM” on
page 9-56. NG

Properly connect or repair the fuel pump
system’s wiring.
OK 
Replace the ECU.

ELECTRICAL COMPONENTS
9-66
Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, check
the wiring connections and if necessary, replace the switch.
ECA
NOTICE
Never insert the tester probes into the coupler terminal slots “1”. Always insert the probes
from the opposite end of the coupler, taking care not to loosen or damage the leads.
TIP
• Before checking for continuity, set the pocket tester range to “  1” to make a “0” adjustment.
• When checking for continuity, switch back and forth between the switch positions a few times.
Terminal connections of the switch are shown in the terminal connection diagram below.
The switch positions “a” are shown in the far left column and the switch lead colors are shown in the
top row in the switch illustration.
TIP
“ ” indicates continuity between switch termin als (i.e., a closed circuit at each switch posi-
tion).
The example illustration below shows that:
There is continuity between red and brown when the switch is “ON”.Pocket tester
90890-03112
Analog pocket tester YU-03112-C
a

EAS2GC1427
WIRING DIAGRAM
WR450F/WR450FG 2016
1. Joint connector
2. Joint connector
3. Joint connector
4. AC magneto
5. Rectifier/regulator
6. Headlight relay
7. Main relay
8. Engine ground
9. Battery
10. Frame ground
11. Starter relay
12. Main fuse
13. Starter motor
14. Starter relay diode
15. Indicator light
16. Engine trouble warning light
17. Fuel level warning light
18. Resistor
19. Fuel sender
20. Diode
21. Coupler for connecting option-al part
22. ECU (engine control unit)
23. Ignition coil
24. Spark plug
25. Injector
26. Fuel pump
27. Radiator fan motor relay
28. Radiator fan motor fuse
29. Radiator fan motor
30. Joint connector
31. Intake air temperature sensor
32. Coolant temperature sensor
33. Throttle position sensor
34. Intake air pressure sensor
35. Lean angle sensor
36. Engine stop switch
37. Neutral switch
38. Diode
39. Starting circuit cut-off relay
40. Clutch switch
41. Start switch
42. Joint connector
43. Taillight
44. Headlight
45. Coupler for connecting option- al switch
46. Speed sensor
47. Multi-function display
48. Frame ground
49. Ignition coil sub-lead
50. Negative battery lead
51. Engine ground sub-lead
EAS2GC1428
COLOR CODE
BBlack
Br Brown
Ch Chocolate
Dg Dark green
G Green
Gy Gray
LBlue
Lg Light green
O Orange
PPink
RRed
Sb Sky blue
WWhite
Y Yellow
B/L Black/Blue
B/O Black/Orange
B/W Black/White
B/Y Black/Yellow
Br/W Brown/White
G/B Green/Black
G/W Green/White
G/Y Green/Yellow
L/B Blue/Black
L/G Blue/Green
L/R Blue/Red
L/W Blue/White
L/Y Blue/Yellow
P/L Pink/Blue
R/B Red/Black
R/L Red/Blue
R/W Red/White
R/Y Red/Yellow
W/B White/Black
Y/B Yellow/Black
Y/G Yellow/Green
Y/R Yellow/Red

ONOFF
ONOFF
BBBBBBRRRRRR/LBrBrBrBrBr
BrBr
BrBrBrBr
R/LR/LR/LR/LR/L
B
L
L
L
PP
L
YY
RR
Br
R/LR/LR/L
P/LP/L
R/L
R/L
R/L
R/BR/BL/R
L/YL/Y
Y/R
Y/R
G/Y
G/YG/YG/Y
B/YB/Y
R/L
B/L
B/L
B/L
B/L
B/LY/GY/G
B/L
B/O
L/B
Y/B
W/B
W/BG/BL/B
W/B
W/B
L/BL/B
L/GL/W
L/W
L/R
Br/W
Br/W
R/W
R/W
R/Y
R/Y
G/BG/B
G/B
B/O
B/LB/LB/L
B/LB/LB/LB/L
G/WG/W
Br/WBr/W
R/WR/WBr
OOO
R
O
R
R
Gy
LLLL
BBBB
B
BB
B
BB
B
B
R
R
W
W
Y
Y
Dg
Dg
Ch
Ch
RW
BrBrBrBr
Br
BWSb
SbSb
Sb
Br
BrB
Br
LgLgR/L
R
R
RR
Gy
B
BWWW
WWW
R
RR
G
G
BB
B
Y/B
R
B
BB
BB
B
BB
B
Br
Br
Br
L/G
B/L
B/W
B/W
B
B
B B B
B B BR R R
R RR/LBr Br BrBr Br
(Gy)
(Gy)B/LGy
W W W BGy
BR
W W W
B R
R,R/Y
G
R
Y/B
R,R/W
Br
R
L/R
(B)
R/YR/WBr/WL/G
Br/W,Br
L/W
(B)
(B) Br BrL/YY/R
G/YBr
B B
BrBrL/YY/W
(B)(B)B BGG/Y
RR/LRLgW/B
(B)
B Gy Br R
W/BB/LL Y PG/WB/YR/BLgG/YWBr/WOL/RY/BB/OL/BSbY/RL/Y P/LY/G
(Gy)R/L R/B
R/LB/Y
R/WR/L
R/W,BrP/L
R/L R/L(B)
(B) (B)
(L)
(L) (B)
BR/L
L B
R/L R/L R/L R/L R/L B/L B/L B/L B/L B/L B/L B/LL L L L B B B BBr Br Br Br
B/LBr/W
B/LG/W
L YB/L
B/LP L
B/LY/GL
(B)
(B)B/OB
BB
SbW/BSb
SbG/B
L/G,L/W
L/BBrG/B
G/BBB B
(B)
(B)L/BB
BBBr Br
Br Br
Br
B
B
L Y
(B)
(B)
(B)
(B)
(B)
G B
Ch\fg YBB R W
BrRBW
B/WRWCh \fgY B
BrR/WB W
R
O
OR/L
B
B
B
B
WR450F/WR450FG 2016
WIRING DIAGRAMWR450F/WR450FG 2016
SCHÉMA DE CÂBLAGE
2GC-28199-70_W.D.indd 12015/07/08 10:14:33

ONOFF
ONOFF
(Gy)
(Gy)
(B)
(B)
(B)
(B) (B)
(B)
(Gy)
(B)
(B) (B)
(L)
(L) (B)
(B)
(B)
(B)
(B)
(B)
(B)
(B)
(B)
(B)
,
,
,
,
,
WR450F/WR450FG 2016
WIRING DIAGRAMWR450F/WR450FG 2016
SCHÉMA DE CÂBLAGE
2GC-28199-70_W.D.indd 22015/07/08 10:14:33