Honda NSS250A Reflex 2001-2007, Руководство пользователя

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FUEL SYSTEM (PGM-FI)
6-5
PGM-FI SYMPTOM TROUBLESHOOTING
When the scooter has one of these symptoms, check the DTC or MIL blinking, refer to the DTC index (page 6-19) and begin
the appropriate troubleshooting procedure. If there are no DTC/MIL blinking stored in the PCM/ECM memory, do the diag-
nostic procedure for the symptom, in sequence listed below, until you find the cause.
Symptom Diagnosis procedure Also check for
Engine cranks but won’t
start
(No fuel pump operation
sound when turning the
ignition ON) 1. PCM/ECM power/ground cir-
cuits malfunction (page 6-67)
2. Inspect the fuel pump unit (page
6-76).
• Faulty bank angle sensor or related circuit
• Faulty engine stop relay or related circuit
• Faulty engine stop switch or related circuit
• Faulty ignition switch
• Faulty sensor unit or related circuit
• Faulty PCM/ECM
• Blown main fuse B (15 A)
• Blown ECU, IGN fuse (10 A)
Engine cranks but won’t
start
(No DTC and MIL blinking) 1. Inspect the IACV (page 6-103).
2. Inspect the ignition system
(page 20-5).
• No fuel to injector
– Clogged fuel strainer screen
– Pinched or clogged fuel feed hose
– Pinched or clogged fuel filler cap
breather hole
– Faulty fuel pump unit or fuel pump unit
circuits
• Intake air leak
• Contaminated/deteriorated fuel
• Faulty sensor unit or related circuit
• Faulty fuel injector
Engine stalls, hard to start,
rough idling 1. Inspect the idle speed (page 6-
102).
2. Inspect the IACV (page 6-103).
3. Inspect the fuel supply system
(page 6-71).
4. Inspect the ignition system
(page 20-5).
• Restricted fuel feed hose
• Contaminated/deteriorated fuel
• Intake air leak
• Restricted fuel tank breather hose
Afterburn when engine
braking is used 1. Inspect the PAIR system (page 6-
105).
2. Inspect the ignition system
(page 20-5).
Backfiring or misfiring dur-
ing acceleration Inspect the ignition system (page
20-5).
Poor performance
(driveability) and poor fuel
economy 1. Inspect the fuel supply system
(page 6-71).
2. Inspect the ignition system
(page 20-5).
• Pinched or clogged fuel feed hose
• Faulty pressure regulator in the fuel pump
unit
• Faulty injector
• Clogged air cleaner element
Idle speed is below specifi-
cations or fast idle too low
(No DTC and MIL blinking) 1. Inspect the idle speed (page 6-
102).
2. Inspect the IACV (page 6-103).
3. Inspect the fuel feed hose (page
6-71).
4. Inspect the ignition system
(page 20-5).
Idle speed is above specifi-
cations or fast idle too high
(No DTC and MIL blinking) 1. Inspect the idle speed (page 6-
102).
2. Inspect the throttle operation
and freeplay.
3. Inspect the IACV (page 6-103).
• Intake air leak
• Engine top end problem
• Air cleaner condition
MIL never comes ON at all Inspect the MIL circuit (page 6-67).
MIL stays ON at all
(No DTC set) Inspect the MIL/DLC circuits (page
6-67).
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