Yamaha STAR XVS95CE 2DX1 2014 Service Manual page 354

Fault code No.
Item
3 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).
4 Wire harness continuity.
5 Check fuel pressure.
6 Defective O sensor.
2
7 Malfunction in ECU.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Indicated
Procedure
24
O sensor: no normal signals are received from the O
2
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Open or short circuit → Re-
place the wire harness.
Between O sensor coupler
2
and ECU coupler.
gray/white–gray/white
gray/green–gray/green
Between O sensor coupler
2
and joint coupler.
red/white–red/white
black/blue–black/blue
Between joint coupler and
ECU coupler.
black/blue–black/blue
red/white–red/white
Refer to "CHECKING THE
PRESSURE REGULATOR
OPERATION" on page 6-10.
Check the O sensor.
2
Replace if defective.
Refer to "ENGINE REMOV-
AL" on page 5-3.
Replace the ECU.
28
Engine temperature sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
11
Displays the engine temperature.
Make sure that the display is close to the ambient temperature
during cold starting.
7-41
FUEL INJECTION SYSTEM
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. 63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 4.
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. 63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 5.
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. 63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 6.
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. 63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 7.
sensor.
2