Checking The Indicator Light - Yamaha YZ450FP 2023 Owner's Service Manual

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CHECKING THE INDICATOR LIGHT

If the indicator light flashes orange, check and service the items or components that are the possible
cause of the malfunction.
1
1. Orange
2. Approx. 1 second
Indicator light flashes orange fast
Fail-safe system
Unable to start engine
Unable to cranking engine
Indicator light flashes orange slow
Fail-safe system
Able to drive vehicle
2
Possible cause
Throttle position sensor failure
Intake air pressure sensor failure
Ignition coil failure
Injector failure
Vehicle has overturned
ECU failure
Possible cause
Defective gear position switch
Defective intake air pressure sen-
sor
Defective throttle position sensor
Defective intake air temperature
sensor
Defective coolant temperature
sensor
Defective vehicle system power
supply
Defective fuel system power sup-
ply
Defective writing on EEPROM
Defective ECU
8-56
ELECTRICAL COMPONENTS
1
3
3. 1 second
Replace the throttle position sen-
sor.
Replace the intake air pressure
sensor.
Replace the ignition coil.
Replace the injector.
Raise the vehicle upright.
Replace the ECU.
Replace the gear position switch.
Replace the intake air pressure
sensor.
Replace the throttle position sen-
sor.
Replace the intake air tempera-
ture sensor.
Replace the coolant temperature
sensor.
Replace the wire harness.
Replace the ECU.
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