FUEL INJECTION SYSTEM
8-21
TIP
Make sure that the machine is completely cold before checking the intake air temperature sensor.
Fault code
22
Symptom
Intake air temperature sensor: open or short circuit detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No.
05
Diagnostic tool display
Displays the intake air temperature.
Procedure
Compare the actually measured intake air temperature with the
Yamaha diagnostic tool display value.
Or-
der
Probable cause of malfunc-
tion and check
Maintenance job
Reinstatement method
1
Connection of intake air tem-
perature sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler, and
check the pins (for bent or
broken terminals and locking
condition of the pins).
Improperly connected
Connect the coupler secure-
ly, or repair/replace the wire
harness.
Turn “ON” the switch on the
FI diagnostic tool sub-lead.
Fault code No. is not dis-
played
Repair is finished.
Fault code No. is displayed
Go to next order.
2
Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler, and
check the pins (for bent or
broken terminals and locking
condition of the pins).
Improperly connected
Connect the coupler secure-
ly, or repair/replace the wire
harness.
Turn “ON” the switch on the
FI diagnostic tool sub-lead.
Fault code No. is not dis-
played
Repair is finished.
Fault code No. is displayed
Go to next order.
3
Wire harness continuity.
Open or short circuit
Re-
place the wire harness.
Between intake air tempera-
ture sensor coupler and ECU
coupler.
brown/white–brown/white
black/blue–black/blue
Turn “ON” the switch on the
FI diagnostic tool sub-lead.
Fault code No. is not dis-
played
Repair is finished.
Fault code No. is displayed
Go to next order.
4
Mounted condition of intake
air temperature sensor.
Check for looseness or
pinching.
Check the mounted condition
for correctness.
Improperly mounted sensor
Remount or replace the
sensor.
Turn “ON” the switch on the
FI diagnostic tool sub-lead.
Fault code No. is not dis-
played
Repair is finished.
Fault code No. is displayed
Go to next order.
5
Defective intake air tempera-
ture sensor.
Execute the diagnostic mode.
(Code No. 05)
When the machine is cold,
displayed temperature is
close to the ambient temper-
ature.
Improper display
Replace
the intake air temperature
sensor.
Turn “ON” the switch on the
FI diagnostic tool sub-lead.
Fault code No. is not dis-
played
Repair is finished.
Fault code No. is displayed
Go to next order.
6
Faulty ECU
Replace the ECU.
Содержание YZ250F(E)
Страница 4: ......
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Страница 16: ...LOCATION OF IMPORTANT LABELS 1 2 EUR...
Страница 17: ...LOCATION OF IMPORTANT LABELS 1 3 AUS NZL ZAF...
Страница 42: ...CLEANING AND STORAGE 1 28...
Страница 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25...
Страница 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Страница 71: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 28 1 Exhaust camshaft 2 Intake camshaft 3 Oil filter element 4 Oil pump...
Страница 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29...
Страница 73: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 30 1 Camshaft 2 Oil pressure check bolt 3 Oil filter element 4 Oil pump...
Страница 74: ...CABLE ROUTING DIAGRAM 2 31 EAS1SM1064 CABLE ROUTING DIAGRAM...
Страница 76: ...CABLE ROUTING DIAGRAM 2 33...
Страница 78: ...CABLE ROUTING DIAGRAM 2 35...
Страница 80: ...CABLE ROUTING DIAGRAM 2 37...
Страница 82: ...CABLE ROUTING DIAGRAM 2 39...
Страница 84: ...CABLE ROUTING DIAGRAM 2 41...
Страница 190: ...CHAIN DRIVE 4 66...
Страница 250: ...OIL PUMP AND BALANCER GEAR 5 57 c d 6 6 7 8 8 b...
Страница 286: ......
Страница 293: ...CHARGING SYSTEM 8 7 EAS1SM1325 2 AC magneto 3 Rectifier regulator 4 Joint connector 5 Condenser...
Страница 295: ...CHARGING SYSTEM 8 9 EAS1SM1326...
Страница 321: ...FUEL PUMP SYSTEM 8 35 EAS1SM1333...
Страница 322: ...ELECTRICAL COMPONENTS 8 36 ELECTRICAL COMPONENTS EAS1SM1334 9 10 1 2 3 4 5 6 7 8...
Страница 324: ...ELECTRICAL COMPONENTS 8 38 CHECKING THE SWITCHES B Y P Sb 2 1...
Страница 325: ...ELECTRICAL COMPONENTS 8 39 1 Engine stop switch 2 Neutral switch...
Страница 334: ...ELECTRICAL COMPONENTS 8 48...
Страница 342: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7...
Страница 353: ......
Страница 354: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER...