Method With Timing Light

WARNING: This page is about a different car, the 2013 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

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.
Warm up the engine.
Stop the engine, and turn the ignition switch to OFF.
Disconnect the ground cable from battery.

Fig 1: Disconnecting/Connecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Remove the air intake duct. < Refer to REMOVAL , Air Intake Duct. >
Remove the air cleaner case. < Refer to REMOVAL , Air Cleaner Case. >
Connect the timing light to the power wire of #1 ignition coil.
Install the air cleaner case. < Refer to INSTALLATION , Air Cleaner Case. >
Connect the battery ground terminal.

Fig 2: Disconnecting/Connecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Start the engine, turn the timing light to the crank pulley, and check the ignition timing through the timing belt cover gauge.
NOTE: If ignition timing is out of standard, check the ignition control system. Refer to "Engine Control System". < Refer to BASIC DIAGNOSTIC PROCEDURE . >

Ignition timing [BTDC/rpm]:

Standard

12°±10°/700
After inspection, install the related parts in the reverse order of removal.