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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 103 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES)IGNITION CHECKSIGNITION COIL RESISTANCEGS300 & IS300
2004 Toyota Matrix XR, FWD, Standard

GS300 & Is300

2004 Toyota Matrix XR, FWD, StandardSECTION GS300 & Is300
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove ignition coil. See IGNITION SYSTEM in REMOVAL & INSTALLATION - EXCEPT GX470 article.
  2. Using ohmmeter, check ignition coil primary resistance between positive (+) and negative (-) electrical terminals on ignition coil. See Fig 1. Replace ignition coil if ignition coil primary resistance is not within specification. See IGNITION COIL RESISTANCE (OHMS)  table.
  3. Using ohmmeter, check ignition coil secondary resistance between electrical terminal and spark plug terminal on ignition coil. See Fig 2. Replace ignition coil if ignition coil secondary resistance is not within specification. See IGNITION COIL RESISTANCE (OHMS)  table. Reinstall ignition coil.
    IGNITION COIL RESISTANCE (OHMS)

    Application Primary Secondary
    GS300 & IS300
    Cold (1) .33-.52 8500-14,700
    Hot (2) .42-.61 10,800-17,200
    (1) Cold is with coolant temperature of 14-122°F (-10-50°C).
    (2) Hot is with coolant temperature of 123-212°F (51-100°C).
    Fig 1: Checking Ignition Coil Primary Resistance (GS300 & IS300)
    G98C11231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.