Idle Speed - Subaru 2009 IMPREZA Service Manual

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3. Idle Speed

A: INSPECTION

1) Before checking the idle speed, check the fol-

lowing item:

(1) Check the air cleaner element is free from

clogging, ignition timing is correct, spark plugs

are in good condition, and hoses are connected

(2) Check the malfunction indicator light does

not illuminate.

2) Warm up the engine.

3) Read the engine idle speed using Subaru Select

Monitor. <Ref. to EN(H4SO)(diag)-35, READ CUR-

RENT DATA FOR ENGINE (NORMAL MODE),

OPERATION, Subaru Select Monitor.>

4) Check the idle speed when no-loaded. (Head-

light, heater fan, rear defroster, radiator fan, A/C

and etc. are OFF)

Idle speed (No load and at "P" or "N" position

on AT model, or neutral position on MT model):

700 100 rpm (AT model)

650 100 rpm (MT model)

5) Check the idle speed when loaded. (Turn the A/

C switch to "ON" and operate the compressor for at

least one minute before measurement.)

Idle speed (A/C "ON" and at "P" or "N" position

on AT model, or neutral position on MT model):

Idle speed cannot be adjusted manually, because

the idle speed is automatically adjusted. If the pre-

scribed idle speed cannot be maintained, refer to

the General On-board Diagnosis Table under "En-

gine Control System". <Ref. to EN(H4SO)(diag)-2,

Basic Diagnostic Procedure.>