FUEL INJECTION SYSTEM
8-21
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 to turn
on the engine trouble warning light comes on while the start switch is being pushed.
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. 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
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