FUEL INJECTION SYSTEM
8-40
TIP
Disconnect the fuel pump coupler when this diagnostic tool is used.
Fault code No.
39
Item
Injector: open or short circuit detected.
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No.
36
Actuation
Actuates injector five times at one-second intervals.
The engine trouble warning light and the “WARNING” on the
Yamaha diagnostic tool screen come on each time the injector is
actuated.
Procedure
Check that injector is actuated five times by listening for the oper-
ating sound.
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service
completion
1
Connection of injector cou-
pler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected
Connect the coupler securely
or repair/replace the wire har-
ness.
Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 2.
Operating sound
Go to
item 6.
2
Defective injector.
Measure the fuel injector re-
sistance.
Replace if out of specifica-
tion.
Refer to “CHECKING THE
FUEL INJECTOR” on page 8-
72.
Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 3.
Operating sound
Go to
item 6.
3
Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected
Connect the coupler securely
or repair/replace the wire har-
ness.
Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 4.
Operating sound
Go to
item 6.
4
Wire harness continuity.
Open or short circuit
Re-
place the wire harness.
Between injector coupler and
ECU coupler.
red/black–red/black
red–red/blue
Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 5.
Operating sound
Go to
item 6.
5
Malfunction in ECU.
Replace the ECU.
—
6
Delete the fault code.
—
Start the engine and let it idle
for approximately 5 seconds.
Check that the fault code
number is not displayed.
Содержание YZ 2018 Series
Страница 6: ...EASB916006 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Страница 10: ......
Страница 40: ...MOTORCYCLE CARE AND STORAGE 1 28...
Страница 51: ...ELECTRICAL SPECIFICATIONS 2 10 Fuse s Main fuse 15 0 A Spare fuse 15 0 A Radiator fan motor fuse 5 0 A...
Страница 64: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23...
Страница 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25...
Страница 67: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 26 1 Exhaust camshaft 2 Intake camshaft 3 Oil filter element 4 Oil pump...
Страница 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Страница 69: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 28 1 Camshaft 2 Oil pressure check bolt 3 Oil filter element 4 Oil pump...
Страница 70: ...CABLE ROUTING DIAGRAM 2 29 EASB29B065 CABLE ROUTING DIAGRAM...
Страница 72: ...CABLE ROUTING DIAGRAM 2 31...
Страница 74: ...CABLE ROUTING DIAGRAM 2 33...
Страница 76: ...CABLE ROUTING DIAGRAM 2 35...
Страница 78: ...CABLE ROUTING DIAGRAM 2 37...
Страница 80: ...CABLE ROUTING DIAGRAM 2 39...
Страница 82: ...CABLE ROUTING DIAGRAM 2 41...
Страница 84: ...CABLE ROUTING DIAGRAM 2 43...
Страница 235: ...ELECTRIC STARTER 5 38 5 Install Bolt 1 O ring 2 TIP Apply the lithium soap based grease on the O ring New...
Страница 255: ...OIL PUMP AND BALANCER GEAR 5 58 a 2 10 b 2 9 1 b 5 3 a 4 10 5 9 3 E c d 6 7 8 8 b 6...
Страница 276: ...TRANSMISSION 5 79...
Страница 290: ...FUEL TANK 7 5 A Left B Right 1 1 A 0 mm 0 in B 1 1 15 mm 0 59 in...
Страница 296: ...THROTTLE BODY 7 11...
Страница 299: ......
Страница 313: ...CHARGING SYSTEM 8 14...
Страница 321: ...COOLING SYSTEM For JPN 8 22...
Страница 351: ...FUEL PUMP SYSTEM 8 52 EASB29B345...
Страница 352: ...ELECTRICAL COMPONENTS 8 53 ELECTRICAL COMPONENTS EASB29B346 9 10 11 1 3 2 4 5 6 7 8...
Страница 354: ...ELECTRICAL COMPONENTS 8 55 11 10 9 2 3 1 6 7 8 4 5...
Страница 356: ...ELECTRICAL COMPONENTS 8 57 EASB29B347 CHECKING THE SWITCHES 4 1 3 2 B B Sb B B B B B B B B...
Страница 357: ...ELECTRICAL COMPONENTS 8 58 1 Engine stop switch 2 Neutral switch 3 Clutch switch 4 Start switch...
Страница 372: ...ELECTRICAL COMPONENTS 8 73 c Measure the fuel injector resistance...