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Ignition Coil Test

  1. Turn ignition off. Disconnect ignition coil 4-pin connector. Measure primary winding resistance between ignition coil connector terminals No. 2 (Black/Yellow wire) and No. 3 (Green wire). Resistance should be .36-.44 ohm at 68°F (20°C). See Fig 1.
  2. Measure secondary winding resistance between ignition coil connector middle terminal No. 2 (Black/Yellow wire) and secondary terminal (coil tower). Resistance should be 10,800-16,200 ohms at 68°F (20°C).
  3. Measure resistance between ignition coil connector terminals No. 3 (Green wire) and No. 4 (Blue wire). Replace coil if resistance is not within specification. If resistance is as specified, check for continuity between ignition coil terminals No. 1 (Black/Yellow wire) and No. 2 (Black/Yellow wire). If continuity does not exist, replace ignition coil.
    Fig 1: Testing Ignition Coil (2.5TL)
    G95G31175Courtesy of AMERICAN HONDA MOTOR CO., INC.
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