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PGM - FI SYSTEM
PGM
-
FI SYMPTOM TROUBLESHOOTING
When the motorcycle has one of these symptoms , check the DTC or
MIL blinking
,
refer to the DTC
index (
page 4
-
10 ) and begin the
appropriate troubleshooting procedure . If there are no DTC/
MIL blinking
stored in the
ECM /PCM memory ,
do the diagnostic
procedure for
the symptom
, in sequence listed below , until you find cause
.
Symptom
Diagnosis procedure
Also check for
Engine
cranks
but won ' t start
( No DTC and MIL blinking )
1
.
Inspect the spark plug condition
( page 3
-
6 )
.
2
. Inspect the
ignition system ( page 5
-
6 )
.
3
.
Inspect the cylinder compression
( page 10
-
5 )
.
4
. Inspect
the IACV (
page 7
-
20 )
.
5
.
Inspect the fuel supply system ( page 7
-
10 )
.
•
No
fuel to fuel injector
-
Clogged fuel filter
-
Pinched
or clogged fuel feed
hose
-
Faulty fuel pump
-
Faulty fuel
pump circuits
•
Intake air leak
•
Contaminated
/ deteriorated fuel
•
Faulty fuel injector
Engine
cranks
but won
'
t start
( No fuel pump operation sound
when the turning the ignition
ON )
1
.
ECM/ PCM power / ground circuits
malfunction ( page 4
-
35 )
.
2
.
Inspect
the fuel supply system ( page 7
-
10 )
.
•
Open circuit in the power input
and
/ or
ground wire of the ECM/
PCM
• Blown main fuse
( 30 A )
Blown
sub fuse 15
A ( FI )
•
Blown sub fuse 7.5 A ( ENG STOP )
Engine
stalls , hard
to start ,
rough idling
1
. Inspect the
engine idle speed ( page 3
-
11 )
.
2
.
Inspect the IACV ( page 7
-
20 ) .
3
. Inspect the
fuel supply system ( page 7
-
4 )
.
4
.
Inspect the battery charging system
( page 21
-
6 )
.
5
.
Inspect the ignition system ( page 5
-
6 )
.
•
Restricted fuel
feed hose
Contaminated
/ deteriorated fuel
•
Intake air leak
• Faulty
MAP sensor
Restricted fuel tank breather hose
Afterburn when engine braking
is used
Inspect the ignition system ( page 5
-
6 )
.
Backfiring or misfiring during
acceleration
Inspect the ignition system ( page 5
-
6 ) .
Poor performance ( driveability )
and poor fuel economy
1 . Inspect the fuel supply system ( page 7
-
4 )
.
2
.
Inspect the air cleaner element ( page 3
-
5 )
.
3
. Inspect
the ignition system ( page 5
-
6 )
.
Faulty pressure regulator ( fuel
pump )
Faulty fuel injector
• Faulty
MAP sensor
Idle speed is below
specifications or fast idle too low
( No DTC and MIL blinking )
1 . Inspect the engine idle speed ( page 3
-
11 )
.
2
. Inspect the
IACV ( page 7
-
20 )
.
3
. Inspect the
ignition system ( page 5
-
6 )
.
Idle speed is above
specifications or fast idle
too
high ( No DTC and MIL blinking )
1
. Inspect the
engine
idle
speed ( page 3
-
11 )
.
2
.
Inspect the throttle operation and freeplay
( page 3
-
4 )
.
3
. Inspect the
IACV ( page 7
-
20 )
.
4
.
Inspect the ignition system ( page 5
-
6 )
.
Intake
air leak
*
Engine top
-
end problem
•
Air cleaner element condition
MIL
stays ON but no DTCs set ,
or
MIL never
comes ON at all
Inspect the MIL circuit ( page 4
-
32 )
.
PGM
-
FI TROUBLESHOOTING INFORMATION
GENERAL TROUBLESHOOTING
Intermittent Failure
The term
"
intermittent failure
"
means a system may have had a failure
,
but it checks OK now
.
If the MIL does not come on , check
for
poor contact
or loose
pins
at all connectors
related to the circuit that of the troubleshooting
.
If the MIL was on
,
but then went out ,
the original problem may be intermittent
.
Opens and Shorts
"
Opens " and " Shorts " are common
electrical terms .
An open is a break in a wire or at a connection
.
A short is
an accidental
connection
of a wire to ground or to another wire
.
In simple
electronics
, this usually means something will not work at all
. With
ECM /
PCMs this can something mean something work
,
but not the way it ' s supposed
to
.
If the MIL has come on
Refer to DTC READOUT ( page 4
-
9 )
.
If the MIL did not stay on
If the MIL did not
stay
on
,
but there is a driveability problem , do the SYMPTOM
TROUBLESHOOTING
( page 4
-
7 ) .
4 - 7
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Troubleshooting
