1. Before checking the idle speed, check the following 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 properly.
(2) Check the malfunction indicator light does not illuminate.
2. Warm-up the engine.
3. Stop the engine, and turn the ignition switch to OFF.
4. Insert the cartridge to the Subaru Select Monitor.
5. Connect the Subaru Select Monitor to the data link connector.
6. Turn the ignition switch to ON and the Subaru Select Monitor ON.
7. Select {Each System Check} in Main Menu.
8. Select {Engine Control System} in Selection Menu.
9. Select {Current Data Display & Save} in Engine Control System Diagnosis.
10. Select {Data Display} in Data Display Menu.
11. Start the engine, and read the engine idle speed.
12. Check the idle speed when no-loaded. (Headlight, heater fan, rear defroster, radiator fan, A/C, etc. are OFF.)
Idle speed (No load and gears in neutral, or “N” or “P” range):
DOHC Non-turbo model
650±50 rpm (MT model)
670±50 rpm (AT model)
DOHC Turbo model
700±100 rpm
13. Check the idle speed when loaded. (Turn the air conditioning switch “ON” and operate the compressor for at least one minute before measurement.)
Idle speed (A/C ON and gears in neutral, or “N” or “P” range):
DOHC Non-turbo model
800±50 rpm
DOHC Turbo model
When A/C refrigerant pressure is low.
MT: 725±100 rpm
AT: 750±100 rpm
When A/C refrigerant pressure is high.
MT: 800±100 rpm
AT: 825±100 rpm
NOTE:
Idle speed cannot be adjusted manually, because the idle speed is automatically adjusted. If the prescribed idle speed cannot be maintained, refer to General On-board Diagnosis Table under “Engine Control System”. 