Idle Speed - Subaru Legacy 2002 Service Manual

3. Idle Speed

S143082
A: INSPECTION
1) Before checking idle speed, check the follow-
ing:
(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(H6)-14, SPECIAL TOOLS, PREPA-
RATION 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:
¼ When using the OBD-II general scan tool, care-
fully read its operation manual.
¼ 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
engine speed.
5) Check idle speed when unloaded. (With
headlights, heater fan, rear defroster, radiator fan,
air conditioning, etc. OFF)
IDLE SPEED
S143082A10
B2M3148
ME(H6)-21
Idle speed (No load and gears in N or P posi-
tion):
600±50 rpm
6) Check idle speed when loaded. (Turn air con-
ditioning 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
CAUTION:
Idle speed cannot be adjusted manually
because it is controlled automatically. If idle
speed is out of specifications, refer to General
On-board Diagnosis Table under "Engine Con-
trol System". <Ref. to EN(H6)-2, Basic Diagnos-
tic Procedure.>
Mechanical