Yamaha XVS950CU 2014, Руководство по обслуживанию

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FUEL INJECTION SYSTEM
7-83
09 Procedure
Set the engine stop switch to “ ”, and then compare the actually
measured battery voltage with the display value. (If the actually
measured battery voltage is low, recharge the battery.)
50
Actuation
Actuates the relay unit (fuel pump relay) five times at one-second
intervals.
The “CHECK” indicator and “
” on the Yamaha diagnostic tool
screen come on each time the relay is actuated.
(When the relay is on, the “CHECK” indicator and “
” on the
Yamaha diagnostic tool screen go off. When the relay is off, the
“CHECK” indicator and “
” on the Yamaha diagnostic tool
screen come on.)
Procedure
Check that the relay unit 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 Connection of relay unit cou-
pler.
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.
Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 2.
2 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.
Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 3.
3 Wire harness continuity. Open or short circuit
→
Re-
place the wire harness.
Between relay unit coupler
and ECU coupler.
red/blue–red/blue
Between starter relay cou-
pler and relay unit coupler.
red/black–red/black
Between starter relay cou-
pler and battery.
red–red
Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 4.
4 Defective relay unit. Execute the diagnostic
mode. (Code No. 50)
No operating sound
→
Re-
place the relay unit.
Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 5.
Fault code No. 43
Item
Fuel system voltage: incorrect voltage supplied to the fuel in-
jector and fuel pump.