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Ignition Coil Resistance

  1. Disconnect distributor 3-pin connector. Using ohmmeter, measure primary resistance between terminals "A" and "B". See Fig 1 . Resistance should be as specified. See IGNITION COIL RESISTANCE  table. If resistance is not as specified, replace distributor.
  2. Remove distributor cap. Using an ohmmeter, measure secondary resistance between terminal "A" and coil tower. See Figure . Resistance should be as specified. See IGNITION COIL RESISTANCE  table. If resistance is not as specified, replace distributor.
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)

Application Primary Secondary
MPV .49-.74 (1) 20,000-31,000
(1) Remove distributor cap to measure secondary coil resistance.
Fig 1: Checking Primary Coil Winding Resistance
G95C33458Courtesy of MAZDA MOTOR CORP.
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