Component Inspection
- Ignition "OFF".
- Measure resistance between terminals 3 and 4 of the sensor connector (Component side)
Specification
TEMPERATURE AND RESISTANCE SPECIFICATIONTemp.(°C) Temp.(°F) Rear HO2S Heater Resistance(Ω) 20 68 9.2 100 212 10.7 200 392 13.1 300 572 14.6 400 752 17.7 500 932 19.2 600 1,112 20.7 700 1,292 22.5 800 1,472 25.1 900 1,652 26.5 - 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.