DR-22A Sensor Calibrations Engine Coolant

This test must be performed with engine cold.

1. Connect voltmeter between terminal No. 23 of logic module blue electrical connector and ground.
2. Place ignition switch in Run position.
3. Voltmeter should indicate 3 to 5 volts at temperatures below 60°F and 1 to 3 volts at temperature between 60° 120°F.
4. If voltage readings are satisfactory, proceed to Test 22 step B.
5. If voltage readings are not satisfactory, replace coolant sensor.