Monitor GDS Data
- Connect GDS to DLC (Data Link Cable).
- Warm up the engine to normal operating temperature.
- Monitor "HO2S (S1)" parameter on the "Current Data" with GDS.
- Monitor "Parameters related to Ignition and Misfire" parameter on the "Current Data" with GDS.
- Are the parameters displayed correctly?
YES
- Fault is intermittent caused by poor contact in the sensor's and/or ECM connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Go to "TERMINAL AND CONNECTOR INSPECTION " procedure.
- When there is a misfire, check the fuel inflow and repair it (i.e. injector leak).