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Home >> Subaru >> 2010 >> Legacy Premium, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Mechanical (H4DOTC - 2.5L DOHC Turbo)) >> Ignition Timing >> Inspection >> Method With Timing Light

Method With Timing Light

WARNING: This page is about a different variant/trim than selected.
  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. Remove the collector cover.
  5. Disconnect the ground cable from battery.
    Fig 1: Disconnecting Ground Cable From Battery
    G06649224Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the air intake duct. Ref. to REMOVAL , Air Intake Duct.
  7. Remove the air cleaner case. Ref. to REMOVAL , Air Cleaner Case.
  8. Connect the timing light to the power wire of #1 ignition coil.
  9. Install the air cleaner case. Ref. to INSTALLATION , Air Cleaner Case.
  10. Connect the ground cable to battery.
    Fig 2: Connecting Ground Cable To Battery
    G06649225Courtesy of SUBARU OF AMERICA, INC.
  11. 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". Ref. to BASIC DIAGNOSTIC PROCEDURE .

    Ignition timing [BTDC/RPM]: 

    Standard 

    15°±10°/700 

  12. After inspection, install the related parts in the reverse order of removal.
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