Control Circuit Inspection

Ignition "OFF"
Disconnect front HO2S harness connector.
Measure voltage between terminal 1 of the HO2S harness connector and chassis ground
Specification: Approx. 2~3V
Measure resistance between terminals 1 and 1,2,3,5,6 of the HO2S harness connector
Specification: Infinite

Fig 1: Measuring Voltage Between Terminal 1 Of HO2S Harness Connector And Chassis Ground
Courtesy of HYUNDAI MOTOR CO.

Fig 2: Measuring Resistance Between Terminals 1 And 1,2,3,5,6 Of HO2S Harness Connector
Courtesy of HYUNDAI MOTOR CO.
Is the measured data within specification?
YES
- Check for open or short circuit in HO2S harness connector. Refer to "SIGNAL WAVEFORM & DATA " procedure in "General Information". Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure