Yamaha YZ450FA 2011 Owner's Service Manual page 298

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 Malfunction in ECU.
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 Determine the area of the problem
41
Lean angle sensor malfunction. (the sensor is built into the ECU)
Unable to start
Unable to drive
D08
Lean angle sensor
• 1.0 V (Upright)
• 4.0 V (Overturned)
Remove the ECU and incline it 45° or more.
Replace the ECU.
44
Error is detected while reading or writing on EEPROM.
Able to start engine (depending on circumstances)
Able to drive vehicle (depending on circumstances)
D60
00: No fault
01: CO adjustment valve
07: Power Tuner adjustment values 0–8 for fuel injection amount or ignition
timing
—
Execute the diagnostic
mode (diagnostic code No.
D60).
7-36
FUEL INJECTION SYSTEM
00 is displayed: Refer to
item 4.
01 is displayed: Refer to
item 2.
07 is displayed: Refer to
item 3.
Checking method
Checking method
Set the switch on the
FI diagnostic tool sub-
wire harness to "ON",
and then check the
fault code display.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
peat item 1. If the
fault code number is
still displayed, refer
to item 3.