Preparation For Checks

WARNING: This page is about a different car, the 1984 Volvo 760, 1984 Volvo 245, 1984 Volvo 244, and 1984 Volvo 242. However, it is still accessible from the selected car via links, so may be relevant.

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.

Connect dwell meter to testing connector. Connector is located on right side shock tower (Red wire).
Set meter on 4-cyl. scale.
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.