Component Inspection

Measure resistance between terminals 5 and 6 of the sensor connector (Component side).

SPECIFICATION

HEATER RESISTANCE SPECIFICATION

Fig 1: Measuring Resistance Between Terminals 5 And 6 Of Sensor Connector

Is resistance within the specification?
YES
- Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.