Troubleshooting Details - Yamaha YZF-R15 Service Manual

TROUBLESHOOTING DETAILS

This section describes the measures per fault code number displayed on the FI diagnostic tool. 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 has been completed, reset the FI diagnostic tool
display according to the reinstatement method.
Fault code No.:
Fault code number displayed on the FI diagnostic tool when the engine failed to work normally. Refer
to "Diagnostic code table".
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to"Sensor operation
table" and "Actuator operation table".
Fault code No. 12
Diagnostic code No.
Order Item/components and probable
cause
1 Installed condition of crankshaft posi-
tion sensor.
2 Connections
• Crankshaft position sensor coupler
• Main wire harness ECU coupler
3 Open or short circuit in wire harness.
4 Defective crankshaft position sensor.
Symptom No normal signals are received from the crankshaft posi-
tion sensor.
— —
Check or maintenance job
Check for looseness or pinching. Cranking the
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between the crankshaft position
• Replace if defective.
8-41
FUEL INJECTION SYSTEM
that may be pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
sensor coupler and ECU cou-
pler.
(red–red)
(black/blue–black/blue)
Refer to "CHECKING THE
CRANKSHAFT POSITION
SENSOR" on page 8-68.
Reinstatement
method
engine.