Yamaha STAR XVS95CE 1TP1 2014, Service Manual

Page: 363 / 422

FUEL INJECTION SYSTEM
7-50
2 Connection of front cylinder
injector and/or rear cylinder
injector coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected
→
Connect the coupler secure-
ly or replace the wire har-
ness.
Execute the diagnostic
mode. (Code Nos. 36, 37)
No operating sound
→
Go to
item 3.
Operating sound
→
Go to
item 7.
3 Defective injector front,
and/or rear injector. Measure the injector resis-
tance.
Replace if out of specifica-
tion.
Refer to “CHECKING THE
FUEL INJECTORS” on page
7-92. Execute the diagnostic
mode. (Code Nos. 36, 37)
No operating sound
→
Go to
item 4.
Operating sound
→
Go to
item 7.
4 Connection of ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected
→
Connect the coupler secure-
ly or replace the wire har-
ness.
Execute the diagnostic
mode. (Code Nos. 36, 37)
No operating sound
→
Go to
item 5.
Operating sound
→
Go to
item 7.
5 Wire harness continuity. Open or short circuit
→
Re-
place the wire harness.
Between injector coupler and
ECU coupler.
Front cylinder injector
gray–gray
Rear cylinder injector
green–green
Between injector coupler and
relay unit coupler.
Front cylinder
white–red/blue
Rear cylinder
white–red/blue
Execute the diagnostic
mode. (Code Nos. 36, 37)
No operating sound
→
Go to
item 6.
Operating sound
→
Go to
item 7.
6 Malfunction in ECU. Replace the ECU.
7 Delete the fault code. Start the engine and let it idle
for approximately 5 seconds.
Check that the fault code
number is not displayed.
Fault code No. 41
Item Lean angle sensor: open or short circuit detected.
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No. 08
Fault code No. 39
Item Injector: open or short circuit detected.