Signal Circuit Inspection

Check Open or Short in signal circuit
1. IG "OFF" and disconnect HO2S (B1/S1) connector.
2. IG "ON"
3. Measure voltage between signal terminal of HO2S (B1/S1) harness connector and chassis ground.
  Specification: Approx. 0.45V
  
  Fig 1: Measuring Voltage Between Signal Terminal Of HO2S (B1/S1) And Chassis Ground
  Courtesy of HYUNDAI MOTOR AMERICA
4. Is the measured voltage within specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Repair Open or Short circuit and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.