Yamaha XVS950CU 2014, Service Manual

Page: 435 / 580

FUEL INJECTION SYSTEM
7-44
EAS30580
TROUBLESHOOTING METHOD
The engine operation is not normal and the
engine trouble warning light comes on.
1. Check:
• Fault code number
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a. Check the fault code number displayed on
the multi-function meter display.
b. Identify the faulty system with the fault code
number.
c. Identify the probable cause of the malfunc-
tion.
▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲
2. Check and repair the probable cause of the
malfunction.
3. Perform the reinstatement action for the fuel
injection system.
Refer to “Confirmation of service completion”
in the appropriate table in “TROUBLE-
SHOOTING DETAILS” on page 7-48.
4. Turn the main switch to “OFF”, and back to
“ON”, and then check that no fault code num-
ber is displayed.
TIP
If another fault code number is displayed, repeat
steps (1) to (4) until no fault code number is dis-
played.
5. Erase the malfunction history in the diagnos-
tic mode (code No. 62). Refer to “SELF-DI-
AGNOSTIC FUNCTION AND DIAGNOSTIC
CODE TABLE” on page 8-5.
TIP
Turning the main switch to “OFF” will not erase
the malfunction history.
The engine operation is not normal, but the
engine trouble warning light does not come
on.
1. Check the operation of the following sensors
and actuators in the diagnostic mode.
If a malfunction is detected in the sensors or
actuators, repair or replace all faulty parts.
If no malfunction is detected in the sensors
and actuators, check and repair the inner
parts of the engine.
Fault code No. No fault code No.
Check and repair.
Refer to “TROUBLE-
SHOOTING DE-
TAILS” on page 7-48.
Monitor the opera-
tion of the sensors
and actuators in the
diagnostic mode. Check and repair.
01: Throttle position sensor signal (throttle
angle)
30: Front cylinder ignition coil
31: Rear cylinder ignition coil
36: Front cylinder injector
37: Rear cylinder injector