Component Inspection

■ Check HO2S (B1/S1) Heater Resistance 

1. IG "OFF" and disconnect HO2S (B1/S1) connector
2. Measure resistance between power and control terminals of HO2S (B1/S1) heater (Component Side)

   Specification:  3.3 ~ 4.1 [20°C (68°F)]

   Fig 1: Measuring Resistance Between Power And Control Terminals Of HO2S (B1/S1) Heater (Component Side)

   Courtesy of HYUNDAI MOTOR AMERICA
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.