B250 3/4 Ton Van V8-318 5.2L VIN T FI (1992)
Oxygen Sensor: Testing and Inspection
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.
