ME(H6DO)-20
MECHANICAL
IDLE SPEED
3. Idle Speed
A: INSPECTION
1) Before checking idle speed, check the following:
(1) Ensure that air cleaner element is free from
clogging, ignition timing is correct, spark plugs
are in good condition, and that hoses are con-
nected properly.
(2) Ensure that malfunction indicator light
(CHECK ENGINE light) does not illuminate.
2) Warm-up the engine.
3) Stop the engine, and turn ignition switch to OFF.
4) When using SUBARU SELECT MONITOR
<Ref. to ME(H6DO)-14, SPECIAL TOOLS, PREP-
ARATION TOOL, General Description.>
(1) Insert the cartridge to SUBARU SELECT
MONITOR.
(2) Connect SUBARU SELECT MONITOR to
the data link connector.
(3) Turn ignition switch to ON, and SUBARU
SELECT MONITOR switch to ON.
(4) Select {2. Each System Check} in Main
Menu.
(5) Select {Engine Control System} in Selection
Menu.
(6) Select {1. Current Data Display & Save} in
Engine Control System Diagnosis.
(7) Select {1.12 Data Display} in Data Display
Menu.
(8) Start the engine, and read engine idle
speed.
NOTE:
• When using the OBD-II general scan tool, care-
fully read its operation manual.
• This ignition system provides simultaneous igni-
tion for #1 and #2 plugs. It must be noted that some
tachometers may register twice that of actual en-
gine speed.
5) Check idle speed when unloaded. (With head-
lights, heater fan, rear defroster, radiator fan, air
conditioning, etc. OFF)
Idle speed (No load and gears in N or P posi-
tion):
600
±±±±
50 rpm
6) Check idle speed when loaded. (Turn air condi-
tioning switch to “ON” and operate compressor for
at least one minute before measurement.)
Idle speed [A/C “ON”, no load and gears in N or
P position]:
700
±±±±
50 rpm
NOTE:
Idle speed cannot be adjusted manually because it
is controlled automatically. If idle speed is out of
specifications, refer to General On-board Diagno-
sis Table under “Engine Control System”. <Ref. to
EN(H6DO)-2, Basic Diagnostic Procedure.>
ME-00447