Yamaha FJR1300A(D) - Page 504

FUEL INJECTION SYSTEM
8-55
Fault code No. 24
Item
O
2
sensor: no normal signals are received from the O
2
sensor.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. —
Meter display —
Procedure —
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Installed condition of O
2
sen-
sor.
Improperly installed sensor
→ Reinstall or replace the
sensor.
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 2.
2 Connection of O
2
sensor
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, 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 3.
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).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
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.
4 Wire harness continuity. Open or short circuit → Re-
place the wire harness.
Between O
2
sensor coupler
and ECU coupler.
gray–gray
pink–pink
Between O
2
sensor coupler
and joint coupler.
black–black
red–red/blue
Between joint coupler and
ECU coupler.
black/blue–black/blue
red/blue–red/blue
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.