Terminal And Connector Inspection
- Ignition "ON" & Engine "OFF".
- Monitor the O2 SNSR VOL.-B1/S2 parameter on the Scantool data list while wiggling the wiring harness and related connectors. Refer to "SIGNAL WAVEFORM & DATA " procedure.
- The value should remain more or less unchanged. If not, check for the following conditions:
- Check for corrosion on terminals
- Check for terminal tension (at the HO2S and at the PCM)
- Check for damaged wiring
- Check the HO2S ground circuit for a good connection
- Check the 15A sensor 2 fuse
- Check front and rear HO2S for connections being reversed
- Was a problem found in any of the above areas?
YES
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Go to next step as indicated below.