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Home >> Toyota >> 1998 >> Avalon XLS >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Basic Testing - V6 & V8 >> Ignition Checks >> Ignition Coil Resistance >> Avalon, Camry, Sienna, Tacoma, T100 & 4Runner

Avalon, Camry, Sienna, Tacoma, T100 & 4Runner

  1. To check ignition coil primary resistance, remove necessary components for access to ignition coil. Disconnect electrical connector at ignition coil.
  2. To disconnect spark plug wire at ignition coil, use screwdriver to lift upward on lock claw. See Figure. Disconnect holder at ignition coil. Pull upward on grommet to disconnect spark plug wire from ignition coil. See Figure. DO NOT pull on spark plug wire.
  3. Using ohmmeter, check ignition coil primary resistance between positive (+) and negative (-) electrical terminals on ignition coil. See Figure. These are the electrical terminals on ignition coil that electrical connector was installed on. Replace ignition coil if ignition coil primary resistance is not within specification. See IGNITION COIL RESISTANCE  table.
  4. To check ignition coil secondary resistance, remove ignition coil. See REMOVE/INSTALL/OVERHAUL article. Using ohmmeter, check ignition coil secondary resistance. See Figure. Replace ignition coil if ignition coil secondary resistance is not within specification. See IGNITION COIL RESISTANCE  table.
  5. Reinstall ignition coil. When installing spark plug wire on ignition coil, ensure spline on ignition coil aligns with spline on holder and install spark plug wire. Ensure holder is properly positioned on grommet and ignition coil. See Figure. Lightly pull upward on holder to ensure lock claw is securely locked in place.
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