Component Inspection

Check HO2S (B1/S2) Heater resistance
1. IG "OFF" and disconnect HO2S (B1/S2) connector
2. Measure resistance between terminal 1 and 2 of HO2S (B1/S2) (Component Side)
  Specification: 8.1-11.1 Ω at 21°C (69.8°F)
  
  Fig 1: Measuring Resistance Between Terminals 1 And 2 Of HO2S (B1/S2)
  Courtesy of KIA MOTORS AMERICA, INC.
3. Is the measured resistance within specification?
  YES
  - Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: There is a memory reset function on scan tool that can erase optional parts automatically detected and memorized by ECM. Before or after testing ECM on the vehicle, use this function before reusing the ECM
  
  NO
  - Substitute with a known-good HO2S (B1/S2) and check for proper operation. If the problem is corrected, replace HO2S (B1/S2) and go to "VERIFICATION OF VEHICLE REPAIR " procedure.