Check the Signal waveform of HO2S
WARNING: This page is about a different variant/trim than selected.
- IG "OFF". Connect HO2S connector.
- Connect probe to HO2S to measure signal waveform using oscilloscope function. Start engine.
- After warming-up, monitor signal waveform of HO2S with GDS.
- Is the sensor switching properly?
YES
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.