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ECU’S SELF-DIAGNOSTIC FUNCTION
The ECU is equipped with a self-diagnostic function in order to ensure that the engine control sys-
tem is operating normally. If this function detects a malfunction in the system, it immediately operates
the engine 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 is stored in the memory of the ECU.
1 Engine trouble warning light
8 To inform the rider that the fuel injection sys-
tem is not functioning correctly, the engine
trouble warning light flashes when the start
switch is being pushed to start the engine.
8 If a malfunction is detected in the system
by the self-diagnostic function, this mode
provides an appropriate substitute charac-
teristic operation, and alerts the rider of the
detected malfunction by illuminating the en-
gine trouble warning light.
8 After the engine has been stopped, the low-
est fault code number appears on the en-
gine trouble warning light (or displayed on
the Fl diagnostic tool). It remains stored in
the memory of the ECU until it is deleted.
Engine trouble warning light fault code indication
Digit of 10: Cycles of 1 see. ON and 1.5 sec. OFF.
Digit of 1: Cycles of 0.5 sec, ON and 0.5 sec. OFF.
<Example> 42
EAS00900
Engine trouble warning light indication and Fl system operating condition
Warning light
indication
Flashing
Remains ON
Flashing
(indicate the fault code)
Engine condition
Operate
(cranking with electric
starter)
Stop
Vehicle operation
Unable
Able
_
Fl operation
Operation stopped
Operated with substitute char-
acteristics in accordance with
the description of the mal-
function
_
FUEL INJECTION SYSTEM
1
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