Component Inspection

Measure resistance between terminals 3 and 4 of the sensor connector (Component side)

SPECIFICATION

HO2S HEATER RESISTANCE SPECIFICATIONS

Fig 1: Measuring Resistance Between Terminals 3 And 4 Of Sensor Connector

Courtesy of HYUNDAI MOTOR CO.

Is resistance within the specification?
YES
- Check for poor connection between PCM 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.