Yamaha XVS950CU 2014, Service Manual, Page: 456 / 580

FUEL INJECTION SYSTEM
7-65
TIP
• Do not remove the ISC (idle speed control) valve.
• If fault code numbers “37” and “46” are both indicated, take the actions specified for fault code number
“46” first.
• If fault code numbers “37” and “42” are both indicated, take the actions specified for fault code number
“42” first.
8 Delete the fault code. Start the engine and let it idle
for approximately 10 sec-
onds.
Check that the fault code
number is not displayed.
Fault code No. 39
Item Injector: open or short circuit detected.
Fail-safe system
Able to start engine (depending on the number of faulty cylinders)
Able to drive vehicle (depending on the number of faulty cylinders)
Diagnostic code No. 36, 37
36
Actuation
Actuates the front cylinder injector five times at one-second inter-
vals.
The “CHECK” indicator and “
” on the Yamaha diagnostic tool
screen come on each time the fuel injector is actuated.
Procedure
Check that front cylinder injector is actuated five times by listening
for the operating sound.
37
Actuation
Actuates the rear cylinder injector five times at one-second inter-
vals.
The “CHECK” indicator and “
” on the Yamaha diagnostic tool
screen come on each time the fuel injector is actuated.
Procedure
Check that rear cylinder injector is actuated five times by listening
for the operating sound.
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Identify the malfunctioning
injector. Execute the diagnostic
mode. (Code Nos. 36, 37)
Identify the injector that does
not produce an operating
sound.
Perform the following proce-
dures for the defective injec-
tor.
Refer to “CHECKING THE
FUEL INJECTORS” on page
7-169. —
Fault code No. 37
Item
A
Component other than ISC (idle speed control) unit is defective
(ISC operating sound is heard).
B
Defective ISC (idle speed control) unit (ISC operating
sound is not heard).