Yamaha YZ450FA 2011, Owner'S Service Manual

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7-32
FUEL INJECTION SYSTEM
3 Continuity of harness Open or short circuit
→
Re-
place.
Between Ignition coil cou-
pler and ECU coupler.
(Orange–Orange)
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 4.
4 Installed condition of ignition coil Check that the sensor is in-
stalled securely and that
there are no pinched
leads.Check that the ECU is
installed securely and that
there are no pinched leads.
Incorrect installation
→
Re-
install or repair.
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 5.
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