FUEL INJECTION SYSTEM
EA$27$1
ECU SELF-DIAGNOSTIC FUNCTION
The ECU is equipped with a self-diagnostic function
in
order to ensure that the fuel
in
jection system is
operat
in
g normally. If this function detects a malfunction in the system, it immediately operates the en-
g
in
e under substitute char
ac
teri
st
ics and illuminates t
he
engine trouble wa
rni
ng
li
ght to alert t
he
ri
der
that a
ma
lfunction has occurred in the system. Once a malfunction has been detect
ed,
a fault code
number is stored
in
the memory
of
the ECU.
•To
in
fonm
the
ri
der that t
he
fuel injection system
is
not fun
ct
ioning, the engine
tr
ouble warning light
flashes wh
il
e the
"(i)"
side
of
the start/engine st
op
switch is being pushed to start the engine.
• If a
ma
lfunction is detected in the system by t
he
self-diagnostic function, the ECU pr
ov
id
es an appro-
priate substi
tu
te characteri
st
ic operatio
n,
and ale
rts
the
ri
de
r of t
he
detected
ma
lfunction
by
illuminat-
ing the engine trouble wa
rn
ing ligh
t.
• After the engine h
as
been stopped, t
he
lowest fault code number appears on t
he
meter display. Once
a fault code has been displayed, it remains stored in the memory
of
the ECU until it is deleted.
Engine
trouble
warning
light
indication
and
fuel
injection
system
operation
Warning
light
ECU
operation
Fuel
injection
Vehicle
operation
indi
cat
ion
operation
Warning provided
F
la
shing•
when unable to sta
rt
Op
eration stopped Cannot
be
operated
engine
Ope
ra
ted with substi-
tute characteri
st
ic
s in Can
or
cannot
be
oper-
Remains on Malfunction detected accordance with the ated depending on the
description of
th
e mal-
fault code
fu
nc
tion
• The warning light flashes when any one of the following conditions is present and the
"&>"
side
of
the starVen-
gine stop switch
is
pushed:
12: Crankshaft position
se
nsor
19:
Sidestand switch
(open circuit in the wi
re
to the ECU)
Lean angle sensor
(latch up detected)
30:
Checking
th
e
eng
i
ne
trouble
warning
l
igh
t
41:
50:
Lean angle se
ns
or
(open
or
short ci
rc
uit)
ECU internal malfunction
(faulty ECU memory)
The engine trouble warning light comes on for around 2 seconds after the main
sw
itch has been set to
"ON" and it comes on while t
he
"
<ll
" side of the start/engine stop
sw
itch is being pushed. If the warning
light does not come on under these conditions, the warni
ng
light (LED) may be defective.
a b
c
a. Main switch "O
FP'
b. Main switch "ON"
c. Engine trouble
war
ning li
ght
off
d. Engine trouble warning li
ght
on for around 2
seconds
c
8-33
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