PGM-FI SYSTEM
When the scooter has one of these symptoms, check the
OTC
or MIL blinking, refer to the
OTC
index (page 4-15) and begin the
appropriate troubleshooting procedure. If there are
no
OTC/MIL blinking stored
in
the ECM memory, do the diagnostic procedure
for the symptom,
in
sequence listed below, until you find cause.
Symptom
Diagnosis procedure
Also check for
Engine does not crank
1.
ECM power/ground circuits
.
Open
c_ircuit
in
the power input and/or ground
(No fuel pump operation
malfunction (page 4-50). wire
of
the ECM
sound when turning ignition
2.
Sensor unit power/ground circuits
.
Blown MAIN 2 fuse (30 A)
switch ON and engine stop
malfunction (page 4-50).
.
Faulty engine stop switch
switch
"O".)
Engine cranks but won't start
1.
Crank the engine for more than
.
No fuel
to
fuel injector
(No MIL blinking)
ten seconds and check the MIL
- Clogged fuel filter
(page 4-10) and execute the - Clogged fuel tank cap breather hole
troubleshooting according to the
- Pinched or clogged fuel feed hose
MIL. - Faulty fuel pump
2.
Inspect the fuel supply system - Faulty fuel pump circuits
(page 7-6).
.
Intake air leak
.
Contaminated/deteriorated.fuel
.
Faulty fuel injector
.
IACV stuck
.
Faulty ignition system
Engine stalls, hard to start,
1.
Check the idle speed (page 3-13).
.
Restricted fuel feed hose
rough idling
2.
Check the IACV (page 7-23).
.
Contaminated/deteriorated fuel
3.
Inspect the fuel supply system
.
Intake air leak
(page 7-6).
.
Restricted fuel tank cap breather
.
Faulty ignition system
Backfiring
or
misfiring during
Check the ignition system
acceleration
(page 5-5).
Poor performance
Inspect the fuel supply system
.
Air cleaner element contaminated
(driveability) and poor fuel
(page 7-6).
.
Pinched or clogged fuel feed hose
economy
.
Faulty pressure regulator (fuel pump)
.
Faulty fuel injector
.
Faulty ignition system
Idle speed is below
1.
Check the idle speed (page 3-13).
.
Faulty fuel supply system
specifications (No MIL
2.
Check the IACV (page 7-23).
.
Faulty ignition system
blinking)
Idle speed is above
1.
Check the idle speed (page 3-13).
.
Faulty ignition system
specifications (No MIL
2.
Check the throttle operation and
.
Intake air leak
blinking)
freeplay (page 3-6).
.
Engine top-end problem
3.
Check the IACV (page 7-23).
.
Air cleaner condition
MIL stays ON
or
MIL never
Inspect the MIL circuit (page 4-47).
comes ON at all (Engine
operates normally)
MIL stays ON
Inspect the OLC circuit (page 4-47).
(Engine operates normally
and No MIL code set)
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