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Hall Sending Unit Test (Without Knock Control Unit)

  1. Perform Hall sending unit appropriateVOLTAGE SUPPLY CHECK . Turn ignition off. With 3-wire connector installed at distributor, move protective cover to gain access to rear of connector.
  2. Remove distributor cap, rotor and dust cover. Connect voltmeter across terminals No. 1 and 2 at rear of 3-wire connector. Turn ignition on.
  3. Turn crankshaft until trigger wheel blade blocks Hall sender. See Figure. Voltmeter reading should be greater than 4.0 volts. Turn crankshaft until trigger wheel slot is fully aligned with Hall sending unit. Voltmeter should read 0-.5 volts.
  4. If voltmeter readings do not show a voltage difference while testing, replace Hall sending unit. If voltmeter readings are correct, check for same voltage readings at terminals No. 5 and 6 of the Hall ignition control unit (4 and 6 on models with knock control unit). If readings are not identical, check wire harness from Hall sending unit to ignition control unit.
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