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Ignition Unit & Pick-Up Coil Check

  1. If power supply circuit, primary circuit and high tension cables test okay, either the ignition unit or pick-up coil is malfunctioning. Turn ignition off.
  2. Remove distributor cap and rotor. Set ohmmeter to x100 scale and with all wires attached, touch both ohmmeter leads to pick-up coil terminals. Reverse probes on terminals.
  3. Reading should be approximately 400 ohms. If so, pick-up coil is okay. Replace ignition unit. If reading is NOT approximately 400 ohms, go to next step.
  4. Ensure 2-pin ignition unit connector is securely connected to unit. Turn ignition on. Connect negative lead of voltmeter to ground and positive lead to ignition coil negative terminal. Measure voltage and turn ignition off.
  5. If no voltage (0 volts) is indicated, ignition unit is defective and must be replaced. However, pick-up coil condition is still unknown. Proceed to PICK-UP COIL CHECK .
  6. If battery voltage is indicated, remove ignition unit. Using an ohmmeter set to x100 range, touch both ohmmeter leads to pick-up coil terminals. If ohmmeter reading is approximately 400 ohms, pickup coil is okay and ignition unit is defective. If reading is not to specifications, pick-up coil is defective but condition of ignition unit is still unknown.
  7. Replace faulty pick-up coil with a new one. Install original ignition unit and repeat SYSTEM SPARK CHECK. If spark occurs, ignition unit is okay. If no spark occurs, replace faulty ignition unit.
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