FUEL INJECTION SYSTEM
8-20
2
Connection of wire harness
ECU 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 wire harness.
Start switch to ON (no need to
start the engine), change the
gear position from neutral posi-
tion to 1st
2nd
…
5th
position. (When doing so, be
sure to hold each position for 10
seconds or more.)
And then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 3.
3
Wire harness continuity.
Open or short circuit
Replace
the wire harness.
Between gear position switch
coupler and ECU coupler.
pink–pink
white/blue–white/blue
yellow/green–yellow/green
Start switch to ON (no need to
start the engine), change the
gear position from neutral posi-
tion to 1st
2nd
…
5th
position. (When doing so, be
sure to hold each position for 10
seconds or more.)
And then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 4.
4
Mounted condition of gear posi-
tion switch.
Check for looseness or pinch-
ing.
Improperly mounted switch
Remount or replace the switch.
Refer to “ENGINE REMOVAL”
Start switch to ON (no need to
start the engine), change the
gear position from neutral posi-
tion to 1st
2nd
…
5th
position. (When doing so, be
sure to hold each position for 10
seconds or more.)
And then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 5.
5
Defective gear position switch.
Execute the diagnostic mode.
(Code No. 25)
The values are indicated
according to the gear position.
Gear in neutral: N
Gear in 1st or 2nd: 1
Gear in other than 1st or 2nd: 3
Abnormal display
Gear posi-
tion switch is defective
Replace the gear position
switch.
Start switch to ON (no need to
start the engine), change the
gear position from neutral posi-
tion to 1st
2nd
…
5th
position. (When doing so, be
sure to hold each position for 10
seconds or more.)
And then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 6.
6
Faulty ECU.
Replace the ECU.
Service is finished.
Fault code No.
8
Item
Gear position switch: open or short circuit detected.
Содержание YZ450FP 2023
Страница 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Страница 10: ......
Страница 44: ...MOTORCYCLE CARE AND STORAGE 1 32...
Страница 61: ...TIGHTENING TORQUES 2 16...
Страница 66: ...CABLE ROUTING DIAGRAM 2 21 Frame and engine right side view 1 A B 2 C 3 4 D 5 6 E 7 9 8 13 12 10 1 11...
Страница 68: ...CABLE ROUTING DIAGRAM 2 23 Handlebar front view 6 5 D 4 3 2 B 1 A 8 F H I 5 10 G 7 E 8 7 E 2 3 9 C J...
Страница 72: ...CABLE ROUTING DIAGRAM 2 27 Frame and battery top view 2 1 B 5 4 3 A 7 4 E 6 D 2 3 C...
Страница 74: ...CABLE ROUTING DIAGRAM 2 29 Rear brake right side view 8 C C C D D E E F G B H 4 3 2 1 7 6 5 A A...
Страница 76: ...CABLE ROUTING DIAGRAM 2 31...
Страница 154: ...REAR BRAKE 4 38 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 26...
Страница 194: ...CHAIN DRIVE 4 78...
Страница 254: ...SHIFT SHAFT 5 58 TIP Align the punch mark a on the shift shaft with the punch mark b in the shift pedal 1 1 1 2 2 a b...
Страница 267: ...CRANKCASE 5 71 6 45 mm 1 77 in 7 60 mm 2 36 in 8 75 mm 2 95 in 1 2 3 3 4 5 6 6 6 8 8 8 7 7 7 LT...
Страница 278: ...TRANSMISSION 5 82...
Страница 300: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Страница 305: ...IGNITION SYSTEM 8 6...
Страница 306: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Страница 310: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Страница 311: ...CHARGING SYSTEM 8 12 2 AC magneto 3 Rectifier regulator 4 Engine ground 5 Frame ground 6 Battery 7 Fuse...
Страница 313: ...CHARGING SYSTEM 8 14...
Страница 314: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM B...
Страница 339: ...FUEL INJECTION SYSTEM 8 40...
Страница 340: ...FUEL PUMP SYSTEM 8 41 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Страница 356: ...ELECTRICAL COMPONENTS 8 57...
Страница 372: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Страница 382: ...CHASSIS 10 9...
Страница 384: ......
Страница 386: ......
Страница 387: ...B YZ450FP 2023 WIRING DIAGRAM BHR 2819U 10_W D indd 1 2022 08 09 13 16 06...
Страница 388: ...ON OFF PUSH FREE PUSH FREE B YZ450FP 2023 WIRING DIAGRAM BHR 2819U 10_W D indd 2 2022 08 09 13 16 06...