Yamaha YZ450FA Automobile User Manual


 
7-31
FUEL INJECTION SYSTEM
Fault code No. 33
Symptom Ignition system circuit signal is not received properly.
Fail-safe system Unable to start
Unable to drive
Diagnostic code No. D30
FI diagnostic tool dis-
play
Actuates the ignition coil for five times every second.
The "WARNING" LED on the FI diagnostic tool comes on each time the ig-
nition coil is actuated.
Checking method
Check the spark five times.
• Connect an ignition checker.
Item Item/components and probable cause Check or maintenance job Checking method
1 Check the connection and locking con-
dition of the ignition coil coupler.
Disconnect the coupler and check the
pins. (bent or broken terminals and
locking condition of the pins)
Poor connection Properly
connect, repair, or replace.
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.
2 Check the connection and locking con-
dition of the wire harness ECU coupler.
Disconnect the coupler and check the
pins. (bent or broken terminals and
locking condition of the pins)
Poor connection Properly
connect, repair, or replace.
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.