Sensor Heating Element Test

SENSOR HEATING ELEMENT TEST

NOTE: This test should be performed only after basic inspection, and ignition and fuel systems inspections are passed.

NOTE: Only use a high input impedance Digital Volt Ohm Meter (DVOM) when testing components on computerized vehicles.

1. Disconnect the oxygen sensor(s) electrical connector from the wiring harness
2. Connect DVOM across terminals 3 and 4 of the sensors electrical connector. Set to read OHMS.
3. Resistance value should be between 5 and 7 ohms.
4. Replace the sensor if the resistance reading is not within the previous specifications or if the ohmmeter indicates infinite resistance.