Component Inspection

WARNING: This page is about a different variant/trim than selected.

■ Check HO2S (B1/S1) Heater resistance

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

Specification:

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

Is the measured 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.