Yamaha YZ450FA 2011 Owner's Service Manual page 296

Fault code No.
Symptom
Fail-safe system
Diagnostic code No.
FI diagnostic tool dis-
play
Checking method
Item Item/components and probable cause Check or maintenance job
1 Check the connection and locking con-
dition of the fuel injector coupler.
Disconnect the coupler and check the
pins. (bent or broken terminals and
locking condition of the pins)
2 Faulty injector
39
Injection system circuit signal is not received properly.
Unable to start
Unable to drive
D36
Actuates the injector for five times every second.
The "WARNING" LED on the FI diagnostic tool comes on each time the
fuel injector is actuated.
Check the operating sound of the injector five times.
Poor connection → Properly
connect, repair, or replace.
Defective → Replace.
Refer to "CHECKING THE
FUEL INJECTORS"
7-34
FUEL INJECTION SYSTEM
Checking method
Start the engine and
let it idle for approxi-
mately 5 seconds.
After completing the
above operation,
check whether a fault
code number is dis-
played.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 2.
Start the engine and
let it idle for approxi-
mately 5 seconds.
After completing the
above operation,
check whether a fault
code number is dis-
played.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 3.