Yamaha FX10X 2008, Service Manual

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7-13
FI
FUEL INJECTION SYSTEM
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Check and service the
items or components that are the probable cause of the malfunction following the order given.
After the check and service of the malfunctioning part have been completed, reset the meter display accord-
ing to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. (Refer to “Fault code
table”.)
Diagnostic code No.:
Code number to be used when the diagnostic mode is operated. (Refer to “Diagnostic mode table”.)
Fault code No. 12 Symptom No normal signals are received from the crankshaft position sensor.
Diagnostic code No. – –
Order Item/components and probable cause Check or maintenance job Reinstatement
method
1 Installed condition of crankshaft position
sensor. Check for looseness or pinching. Cranking the
engine.
2 Connections
Crankshaft position sensor coupler
Wire harness ECU coupler
Check the couplers for any pins that may have
pulled out.
Check the locking condition of the couplers.
If there is a malfunction, repair it and connect the
coupler securely.
3 Open or short circuit in wire harness. Repair or replace if there is an open or short cir-
cuit.
Between the crankshaft position sensor coupler
and ECU coupler.
Gray – Gray
Black/Blue – Black/Blue
4 Defective crankshaft position sensor. Replace if defective.
Refer to “IGNITION SYSTEM” in CHAPTER 8.