Yamaha MBK XMAX 2014 Service Manual page 372

Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of mal-
Item
function and check
1 Installed condition of O
sor.
2 Connection of O
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).
3 Connection of wire harness
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.
24
O sensor: no normal signals are received from the O
2
Able to start engine
Able to drive vehicle
—
—
—
Maintenance job
sen- Improperly installed sensor
2
→ Reinstall or replace the
sensor.
Improperly connected →
sensor
2
Connect the coupler secure-
ly or replace the wire har-
ness.
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Open or short circuit → Re-
place the wire harness.
Between O
and ECU coupler.
gray/green–gray/green
black/red–black/red
black/blue–black/blue
red/black–red/black
Refer to "CHECKING THE
FUEL PRESSURE" on page
7-3.
FUEL INJECTION SYSTEM
sensor coupler
2
8-55
2
Confirmation of service
completion
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. D63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 2.
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. D63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 3.
Start the engine, warm it up,
and then race it, or execute
the diagnostic mode. (Code
No. D63)
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. D63)
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. D63)
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 6.
sensor.