Component Inspection

Check HO2S (B2/S2) Heater resistance
1. IG "OFF". Disconnect HO2S (B2/S2) connector.
2. Measure resistance between power and control terminals of HO2S (B2/S2) heater (Component Side)
  Specification : 3.3 ~ 4.1[20°C (68°F)]
3. Is the measured resistance within specification?
  YES
  - Substitute with a known - good PCM and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.