Component Inspection

Measure resistance between power and control terminals of HO2S (B1/S1) heater (Component Side).

Specification:

TEMPERATURE/RESISTANCE SPECIFICATION

Temp. (°C)	Temp. (°F)	Heater Resistance (Ω)
18 ~ 20	64 ~ 82	3.3 ~ 4.1

Fig 1: Measuring Resistance Between Power & Control Terminals Of HO2S (B1/S1) Heater (Component Side)

Courtesy of KIA MOTORS AMERICA, INC.

Is resistance within 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