Honda TRX500FM Service Manual page 102

PGM -FI SYSTEM
Symptom Diagnosis procedure Also check for
h ''' dI'' e-: s::C pe : :: e d -"C"he"c"k," , l!:he = 'idle speed (page
3-
f5 ) ' , -+-,--O s p : :: a ::: " = p''::: g-: co:Cn3dilio"n""==- - --
specifications or fast Idle too 2. Check the spark plug (page 3-8). air cleaner condition
low (No DIG and Mil blinking ) 3. Check the air cleaner (page 3-5). IACV stuck closed
4. Check the IACV (page 7-26). Faulty fuel supply system
5. Inspect the fuel supply system. Faulty ignition system
- fuel pressure/flow (page 7-11)
- fuel pump (page 7-13)
6. Inspect the ignition system
I-
"';;-;;==== ___
5-5).
-c;;===="".-f-: - ====------ -
Idle speed is above 1. Checktheidle speed (page 3-15). IACVSluck opened
specifications or fas t idle too 2. Check the throttle operation and Faulty ignition system
high (No DTC and MIL lever freeplay (page 3-4). Intake air leak
blinkmg) 3. Check the tACV (page 7-26). Engine top end problem
4. Inspect the ignition system
__
Mil stays on but no OTCs
set.
Inspect the Mil circuit (page Faulty MI L circuit
or MIL never comes ON at all
(page
Circuit
in
the
OlC
(No
OTC sel)
4-6