2016 YAMAHA WR 450F Owners Manual

TROUBLESHOOTING
10-4
7. Wheel (s)• Incorrect wheel balance
• Broken or loose spoke
• Damaged wheel bearing
• Bent or loose wheel axle
• Excessive wheel runout
8. Frame • Bent frame
• Damaged steering head pipe
• Improperly installed bearing race
EAS2GC1422HEADLIGHT DOES NOT COME ON
Electrical system
1. Headlight• Fuse open circuit
• Wrong headlight bulb
• Too many electrical accessories
• Hard charging
• Incorrect connection
• Improperly grounded circuit
• Poor contacts (start switch)
• Burnt-out headlight bulb
EAS2GC1423HEADLIGHT BULB BURNT OUT
Electrical system
1. Headlight
• Wrong headlight bulb
• Faulty battery
• Faulty rectifier/regulator
• Improperly grounded circuit
• Faulty start switch
• Headlight bulb life expired
EAS2GC1424TAILLIGHT DOES NOT COME ON
Electrical system
1. Taillight• Wrong taillight LED
• Too many electrical accessories
• Incorrect connection
• Faulty battery

LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
10-5
EAS2GC1425
LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
LIST OF DIAGNOSTIC CODES
COMMUNICATION ERROR WITH YAMAHA DIAGNOSTIC TOOLFault
code Item Page
12 Crankshaft position sensor: no normal signals are received from the crankshaft position sensor. 9-35
13 Intake air pressure sensor: open or short circuit detected. 9-37
14 Intake air pressure sensor: hose system malfunction (clogged or de- tached hose) 9-38
15 Throttle position sensor: open or short circuit detected. 9-39
16 Throttle position sensor: stuck throttle position sensor is detected. 9-41
21 Coolant temperature sensor: open or short circuit detected. 9-42
22 Intake air temperature sensor: open or short circuit detected. 9-43
30 Latch up detected. 9-44
33 Ignition coil: open or short circuit detected in the primary lead of the ignition coil. 9-45
39 Injector: open or short circuit detected. 9-47
41 Lean angle sensor: open or short circuit detected. 9-48
43 Fuel system voltage: incorrect voltage supplied to the fuel injector and fuel pump. 9-49
44 EEPROM fault code number: an error is detected while reading or writing on EEPROM. 9-50
46 Charging voltage is abnormal. 9-51
50 Faulty ECU memory. (When this malfunction is detected in the ECU, the fault code number might not appear on the meter.) 9-52
Fault code Item Page
Waiting
for con-
nection No communication signal is received from the ECU.
9-52
Er-2 Signals from the ECU cannot be re ceived within the specified period
of time. 9-53
Er-3 Data from the ECU cannot be received correctly. 9-54
Er-4 Registered data cannot be received from the Yamaha diagnostic tool. 9-55

LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
10-6
SENSOR OPERATION TABLEDiag-
nostic code No. Item Display Procedure
01 Throttle position sensor sig- nal
• Fully closed position
• Fully opened position • 11–14
• 109–116 • Check with throttle valve
fully closed.
• Check with throttle valve fully open.
03 Intake air pressure Displays the intake air pres- sure.Operate the throttle while
pushing the start switch. (If
the display value changes,
the performance is OK.)
05 Intake air temperature Displays the intake air tem- perature.Compare the actually mea-
sured intake air tempera-
ture with the Yamaha
diagnostic tool display val-
ue.
06 Coolant temperature When engine is cold: Dis- plays temperature closer to
air temperature.
When engine is hot: Displays
current coolant temperature.Compare the actually mea-
sured coolant temperature
with the Yamaha diagnostic
tool display value.
07 Vehicle speed pulses Vehicle speed pulse 0–999Check that the number in-
creases when the front
wheel is rotated. The num-
ber is cumulative and does
not reset each time the
wheel is stopped.
08 Lean angle sensor • Upright
• Overturned Displays the output voltage.
• 0.4–1.4
• 3.7–4.4 Remove the lean angle
sensor, and incline it more
than 45 degrees.
09 Monitor voltage Displays the fuel system volt- age.
• Approximately 12.0 (V)—
21 Neutral switch • Gear in neutral
• Gear not in neutral •ON
•OFF Operate the shift pedal.
60 EEPROM fault code display • No fault
• CO adjustment value
• Setting tool adjustment values 0–8 for fuel injec-
tion amount or ignition tim-
ing •00
•01
•07
—
61 Malfunction history ( ) code No. display *1
• There is no history.
• There is some history. •00
• Other: Displays the fault
code of ( ). —

LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
10-7
*1: Symbols used in the explanations of the malfunction history: Normal
: There is currently a malfunction or abnormal condition. : A malfunction or abnormal condition occurred prev iously, but the affected system or component
is currently operating normally. 62 Malfunction history ( )
code No. erasure *1
• There is no history.
• There is some history. •00
• Other: Displays the total
number of ( ) and ( ). Replace all ( ) with ( )
by the operation start pro-
cessing.
64 Setting history display • There is no history.
• There is some history.
• History is unknown (Histo-ry data is damaged). Displays the presence or ab-
sence of the setting history by
Power Tuner.
•00
•01
•02
—
65 Setting map erasure • There is no setting.
• There is some setting. Displays the presence or ab-
sence of the setting history by
Power Tuner.
•00
•01 Erase all setting maps by
the operation start process-
ing.
70 Program version number Displays a program version No.—
Diag-
nostic code No. Item Display Procedure

LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
10-8
ACTUATOR OPERATION TABLEDiag-
nostic code No. Item Actuation Procedure
30 Ignition coil Actuates the ignition coil five times at one-second inter-
vals.
“WARNING” on the Yamaha
diagnostic tool blinks five
times when the ignition coil is
actuated.Check that a spark is gener-
ated five times.
• Connect an ignition
checker.
36 Injector Actuates the injector five times at one-second inter-
vals.
“WARNING” on the Yamaha
diagnostic tool blinks five
times when the radiator fan
motor relay is actuated.TIP: Before performing
this operation, be sure to
disconnect the fuel pump
coupler.
Check that injector is actu-
ated five times by listening
for the operating sound.
51 Radiator fan motor relay Actuates the radiator fan mo- tor relay five times at five-sec-
ond intervals.
“WARNING” on the Yamaha
diagnostic tool blinks five
times when the radiator fan
motor relay is actuated.Check that the radiator fan
motor relay is actuated five
times by listening for the op-
erating sound.
52 Headlight relay Actuates the headlight relay five times at five-second in-
tervals.
“WARNING” on the Yamaha
diagnostic tool blinks five
times when the headlight re-
lay is actuated.Check that the headlight re-
lay is actuated five times by
listening for the operating
sound.

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

PRINTED IN JAPAN(E)PRINTED ON RECYCLED PAPER