Component Inspection

Check HO2S (B2/S1) Heater resistance
1. IG "OFF" and disconnect HO2S (B2/S1) connector
2. Measure resistance between power and control terminals of HO2S (B2/S1) heater (Component Side)
  Specification : 3.3 ~ 4.1 (20°C (68°F))
  
  Fig 1: Measuring Resistance Between Power & Control Terminals Of HO2S (B2/S1) Heater
  Courtesy of KIA MOTORS AMERICA, INC.
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.
    NOTE: There is a memory reset function on GDS that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.
  NO
  - Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.