Hyundai GENESIS COUPE BK 2010 Manual page 765

Fig.1) Normal waveforms of front HO2S(the upper) and rear HO2S(the lower). (Waveform between HIGH signal line of
HO2S and chassis ground)
Fig.2) Normal graph of front HO2S and rear HO2S at idle.
After warming-up, if accelerator pedal is released suddenly around 4000rpm, the HO2S signal reading will be lower
than 200mV resulting from Fuel cut-off for the moment. Conversely, if suddenly accelerator pedal is depressed, HO2S
signal reading will be around 0.6V ~1.0V. At idle, Normally HO2S signal will switch from lean to rich with 3 Hz. And as
racing, Its frequency rises.
Monitor GDS Data
1. Connect GDS to Data Link Connector(DLC).
2. IG "ON".
3. Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu.
4. Read "DTC Status" parameter.