Signal Circuit Inspection

Ignition "OFF".
Disconnect HO2S connector.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 1 of the sensor harness connector and chassis ground.
Specification : Approx. 0V

Fig 1: Measuring Voltage Between Terminal 1 Of Sensor Harness Connector And Chassis Ground
Courtesy of HYUNDAI MOTOR AMERICA
Is voltage within the specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair open in the signal circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.