Component Inspection

Component Inspection

1. Check the condition of HO2S
(1) Check HO2S for poor connection or loose terminal.
(2) Check if HO2S is surely installed.
(3) Is the conditions of HO2S normal ?





2. Check the Signal waveform of HO2S
(1) IG "OFF" and connect HO2S connector.
(2) Engine start.
(3) After warming-up, monitor signal waveform of HO2S with scantool.




Fig. 1) Signal waveforms of front HO2S (the upper) and rear HO2S (the lower)
(4) Is the sensor switching properly ?