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Preparation For Checks

NOTE: The frequency valve is operated by pulsating voltage from the electronic control unit. By measuring this signal, certain functions of the system can be tested. A special tester (Bosch KDJE 7453) is recommended, but a high-quality dwell meter may be used instead.
  1. Connect dwell meter to testing connector. Connector is located on right side shock tower (Red wire).
  2. Set meter on 4-cyl. scale.
  3. Start engine and run until warm. Disconnect oxygen sensor and observe meter needle (should not fluctuate). Place a piece of tape on meter face to indicate 50% position.
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