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Home >> Toyota >> 1990 >> Tercel DX, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 4-CYL CARBURETED >> Ignition System Testing >> Spark Test
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Spark Test

  1. On Corolla and Tercel with integral ignition coil, disconnect spark plug wires. Remove spark plugs. Install spark plugs to each spark plug wire. Ground spark plugs.
  2. On Pickup with external ignition coil, disconnect high-tension (coil) wire from distributor. Hold wire about 1/2" away from ground.
  3. On all models, crank engine and check for spark. If spark does not occur, check ignition coil, ignitor and distributor connections.
  4. If connections are good, check high-tension wire resistance. If resistance is not 25,000 ohms maximum per wire, replace wires. If wires are okay, go to next step.
  5. Check power supply to ignition coil and ignitor. Place ignition switch in the "ON" position. Check for voltage at ignition coil positive terminal. If voltage is not present, check wiring between ignition switch, coil, and ignitor. If voltage is present, go to step next step.
  6. Check ignition coil resistance. See IGNITION COIL RESISTANCE TESTS in this article. If ignition coil resistance is not as specified, replace coil. If coil resistance is within specification, go to next step.
  7. Check pick-up coil resistance. See PICK-UP COIL RESISTANCE TEST in this article. If pick-up coil resistance is not according to specification, replace pick-up coil. If resistance is within specification, go to next step.
  8. Check air gap between reluctor and pick-up coil. See PICK-UP COIL AIR GAP CHECK in this article. On all models, if air gap is incorrect, replace pick-up coil.
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