Honda SH300I 2006, Manual

Page: 187 / 511

FUEL SYSTEM (PGM-FI)
6-77
ENGINE IDLE SPEED
IDLE SPEED INSPECTION
• Inspect the idle speed after all other engine main-
tenance items have been performed and are
within specifications.
• Before checking the idle speed, inspect the fol-
lowing items.
– No DTC and MIL blinking.
– Spark plug condition (page 4-7).
– Air cleaner condition (page 4-6).
• The engine must be warm for accurate idle speed
inspection.
• This system eliminates the need for manual idle
speed adjustment compared to previous
designs.
• Use a tachometer with graduations of 50 min
-1
(rpm) or smaller that will accurately indicate a 50
min
-1
(rpm) change.
Start the engine and warm it up to coolant tempera-
ture 80
°
C (176
°
F).
Stop the engine and connect a tachometer accord-
ing to the tachometer manufacturer’s operating
instructions.
Start the engine and let it idle. Check the idle speed.
If the idle speed is out of the specification, check the
following:
• Throttle operation and throttle grip free play
(page 4-5).
• Intake air leak or engine top-end problem (page
9-6).
• IACV operation (page 6-77).
IACV
INSPECTION
The IACV is installed on the throttle body and is
operated by the step motor. When the ignition
switch is turned "ON", the IACV operates for a few
seconds.
Check the step motor operating (beep) sound with
the ignition switch turned "ON".
ENGINE IDLE SPEED: 1,500
±
100 min
-1
(rpm)
IACV