Control Circuit Inspection

Check Short in control circuit
1. IG "OFF" & Disconnect HO2S (S2) connector.
2. IG "ON".
3. Measure the voltage between heater control terminal of HO2S (S2) harness connector and chassis ground.
  Specification: Approx. 3.5V
  
  Fig 1: Measuring Voltage Between Heater Control Terminal Of HO2S (S2) Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR AMERICA
4. Is the measured voltage within specification?
  YES
  
  Go to "COMPONENT INSPECTION " procedure.
  
  NO
  
  Repair Short to ground in control circuit and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.