CAUTION:
After warming-up, engine becomes very hot. Be careful not to burn yourself at measurement.
1. METHOD WITH SUBARU SELECT MONITOR
1. Before checking the ignition timing, check the following item:
(1) Check the air cleaner element is free from clogging, 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 check the ignition timing at idle speed.
Ignition timing [BTDC/rpm]:
DOHC Non-turbo model
15°±10°/650 (MT Model)
15°±10°/670 (AT Model)
DOHC Turbo model
17°±10°/700
If the timing is not correct, check the ignition control system. Refer to “Engine Control System”. 
1. Before checking the ignition timing, check the following item:
(1) Check the air cleaner element is free from clogging, spark plugs are in good condition, and hoses are connected properly.
(2) Make sure that the malfunction indicator light does not illuminate.
2. Warm-up the engine.
3. Stop the engine, and turn the ignition switch to OFF.
4. Remove the air intake duct.
5. Disconnect the connector from the mass air flow and intake air temperature sensor.
6. Remove the air cleaner cover and element.
7. Connect the timing light to the power wire of #1 ignition coil.
8. Connect the connectors of air cleaner cover, element, and the mass air flow and intake air temperature sensor.
9. Start the engine, turn the timing light to the crank pulley, and check the ignition timing by means of crank pulley indicator.
Ignition timing [BTDC/rpm]:
DOHC non-turbo model
15°±10°/650 (MT model)
15°±10°/670 (AT model)
DOHC turbo model
17°±10°/700
If the timing is not correct, check the ignition control system. Refer to “Engine Control System”.