Component Inspection
- Ignition "OFF"
- Disconnect HO2S connector.
- Measure resistance between Heater Control terminal (Pin No. 5) and Heater Power terminal (Pin No. 4) of the HO2S connector. (Component side)BANK 1 SENSOR 1 SPECIFICATIONS
HO2S Heater Normal Parameter HO2S(S1) Heater Resistance (Ω) 2.5~4.0 [20°C(68°F)] - Is HO2S heater resistance display near the specified value?
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.