Yamaha WR450FB 2012 Owner's Service Manual page 348

FUEL INJECTION SYSTEM
Fault code No.
42
Item
Speed sensor: no normal signals are received from the speed
sensor.
3
Wire harness continuity. Open or short
circuit·~
Re- Execute the diagnostic mode.
p!ace the wire harness. (Code No. d:07)
Between rear wheel sensor
Rotate the front wheel by
coupler and ECU coupler. hand and check that the indi-
white-white cated value increases.
..
Fault code number is not dis-
played
~·
Service is finished.
Fault code number is dis-
played
~
Go to next order.
4 Defective speed sensor. Execute the diagn9stic mode. Execute the diagnostic mode.
(Code No. d:07) (Code No. d:07)
Replace if defective.
Rotate the front wheel by
Refer to "CHECKING THE hand and check that the indi-
SPEED SENSOR" on page cated value increases.
9-74 Fault code number is not dis-
played
~
Service is finished.
Fault code number is dis-
played
~
Go to next order.
5
Malfunction in ECU.
Replace the ECU.
Fault code No.
44
Item
EEPROM fault code number: an error is detected while read-
ing or writing on EEPROM.
Fail-safe system
Able/Unable to start engine
Able/Unable to drive vehicle
Diagnostic code No.
d:60
Diagnostic tool display EEPROM fault code display
• 00: No fault
• 01: CO adjustment valve
• 07: Setting tool adjustment values 0-8 for fuel injection amount or
ignition timing
Procedure
-
Or- Probable cause of malfunc-
Maintenance job
Confirmation of service
der tion and check
~
completion
1 Locate the malfunction Execute the diagnostic mode -
(Code No. d:60).
00: Perform the procedure in
order 4.
01: Perform the procedure in
order 4.
9-47