FUEL INJECTION SYSTEM
7-1
EAM20145
FUEL INJECTION SYSTEM
EAM30352
ECU SELF-DIAGNOSTIC FUNCTION
The ECU is equipped with a self-diagnostic function in order to ensure that the fuel injection system is
operating normally. If this function detects a malfunction in the system, it immediately operates the en-
gine under substitute characteristics and illuminates the engine trouble warning light to alert the rider
that a malfunction has occurred in the system. Once a malfunction has been detected, a fault code
number is stored in the memory of the ECU.
•
To inform the rider that the fuel injection system is not functioning, the engine trouble warning light
flashes while the start switch is being pushed to start the engine.
•
If a malfunction is detected in the system by the self-diagnostic function, the ECU provides an appro-
priate substitute characteristic operation, and alerts the rider of the detected malfunction by illuminat-
ing the engine trouble warning light.
Engine trouble warning light indication and fuel injection system operation
* The engine trouble warning light flashes when any one of the following conditions is present and the
start switch is pushed:
Checking the engine trouble warning light
The engine trouble warning light comes on for around 2 seconds when pushing the start switch.
Warning light indica-
tion
ECU operation
Fuel injection operation
Vehicle operation
Flashing*
Warning provided when
unable to start engine
Operation stopped
Cannot be operated
Remains on
Malfunction detected
Operated with substitute
characteristics in accor-
dance with the descrip-
tion of the malfunction
Can or cannot be oper-
ated depending on the
fault code
12:
Crankshaft position sensor
41:
Lean angle sensor
(open or short circuit)
30:
Lean angle sensor
(latch up detected)
50:
ECU internal malfunction
(faulty ECU memory)
33:
Ignition coil
(Malfunction detected in the primary wire of
the ignition coil)
a
b
c
d
c
a. Start switch is not being pushed.
b. Start switch is being pushed.
c. Engine trouble warning light goes off
d. Engine trouble warning light comes on for
around 2 seconds
Summary of Contents for WR450F 2022
Page 8: ......
Page 15: ...LOCATION OF IMPORTANT LABELS 1 5...
Page 16: ...LOCATION OF IMPORTANT LABELS 1 6 AUS NZL ZAF EUR...
Page 90: ...ELECTRICAL SYSTEM 3 32...
Page 134: ...CLUTCH 5 7...
Page 138: ...FUEL TANK 6 3...
Page 146: ...ELECTRICAL COMPONENTS 7 7...
Page 160: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 8 13...
Page 170: ...CHASSIS 9 9...
Page 172: ...PRINTED IN JAPAN E...