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FUEL INJECTION SYSTEM
8-30
3
Connection of sub wire harness
coupler.
Check the locking condition of
the coupler.
Disconnect the coupler, and
check the pins (for bent or bro-
ken terminals and locking condi-
tion of the pins).
Improperly connected
Con-
nect the coupler securely, or
repair/replace the sub wire har-
ness.
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 8 and finish the service.
Condition is “Detected”
Go to
item 4.
4
Wire harness continuity.
Open or short circuit
Replace
the wire harness.
Between ignition coil coupler
and ECU coupler.
orange–orange
red–red
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 8 and finish the service.
Condition is “Detected”
Go to
item 5.
5
Mounted condition of ignition
coil.
Check for looseness or pinch-
ing.
Check the mounted condition
for correctness.
Improperly mounted sensor
Remount or replace the ignition
coil.
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 8 and finish the service.
Condition is “Detected”
Go to
item 6.
6
Defective ignition coil. (test the
primary coils for continuity)
Check the primary resistance of
the ignition coil.
Refer to “CHECKING THE
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 8 and finish the service.
Condition is “Detected”
Go to
item 7.
7
Faulty ECU.
Execute the diagnostic mode.
(Code No. 30)
No spark
Replace the ECU.
Service is finished.
8
Delete the fault code.
Confirm that the fault code has
a condition of “Recovered”
using the Yamaha diagnostic
tool, and then delete the fault
code.
Fault code No.
33
Item
Ignition coil: open or short circuit detected in the primary lead of
the ignition coil.
Summary of Contents for YZ450FN 2022
Page 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Page 10: ......
Page 44: ...MOTORCYCLE CARE AND STORAGE 1 32...
Page 61: ...TIGHTENING TORQUES 2 16...
Page 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view...
Page 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view...
Page 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view...
Page 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view...
Page 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view...
Page 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view...
Page 74: ...CABLE ROUTING DIAGRAM 2 29...
Page 112: ...ELECTRICAL SYSTEM 3 36...
Page 148: ...REAR BRAKE 4 34 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 25...
Page 189: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Connecting rod 2 Oil nozzle 3 Crankshaft...
Page 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Oil filter element 2 Oil pump 3 Oil strainer...
Page 270: ...WATER PUMP 6 9...
Page 280: ...THROTTLE BODY 7 9...
Page 287: ...IGNITION SYSTEM 8 6...
Page 288: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Page 292: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Page 295: ...CHARGING SYSTEM 8 14...
Page 296: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM Sb P Y W...
Page 319: ...FUEL INJECTION SYSTEM 8 38...
Page 320: ...FUEL PUMP SYSTEM 8 39 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Page 350: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Page 360: ...CHASSIS 10 9...
Page 362: ......
Page 364: ......
Page 366: ...YZ450FN 2022 WIRING DIAGRAM B2W 2819U 12_W D indd 2 2021 01 26 11 09 29...