Yamaha Star XVS13AA(C) 2011, Service Manual

Page: 469 / 536

FUEL INJECTION SYSTEM
8-62
EAS27460
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 has been completed, reset the meter display ac-
cording to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. Refer to “Self-Diagnostic
Function table”.
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to “DIAGNOSTIC
MODE” on page 8-53.
Fault code No. 12 Symptom No normal signals are received from the crankshaft posi-
tion sensor.
Diagnostic code No. — —
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of crankshaft posi-
tion sensor. Check for looseness or pinching. Cranking the
engine.
2 Connections
• Crankshaft position sensor coupler
• Main wire harness ECU coupler • Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
3 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between the crankshaft position
sensor coupler and ECU cou-
pler.
(gray–gray)
(black/blue–black/blue)
4 Defective crankshaft position sensor. • Replace if defective.
Refer to “CHECKING THE
CRANKSHAFT POSITION
SENSOR” on page 8-108.