Ignition switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual" and remove lambda sensor unit.

Refer to "Shop Manual" and inspect for following conditions:

- Corrosion and water influx in terminal

- Damaged wiring protection tube, and open in wiring

- Proper installation of the sensor

- Damaged, deformed, or melted sensing element of the sensor

Refer to "Shop Manual" and inspect following conditions on catalyst system;

- Crack or damaged catalyst.

Are the result of the inspection items normal?

	▶ Carefully re-do this troubleshooting guide steps. ▶ If no problems were found with the circuits, connectors and problem is not fixed, replace the downstream lambda sensor and go to "Verification of Vehicle Repair" procedure. ▶ If downstream lambda sensor is replaced and problem is not fixed, replace the Catalyst and go to "Verification of Vehicle Repair" procedure.
	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Ignition switch "OFF"

Connect GDS to Data Link Connector (DLC).

Ignition switch "ON" & Engine "OFF"

Perform "Essential Work After Component Replacement" in "Vehicle S/W Management" with GDS.

Select "Lambda Sensor(LSU) Change"

Fig.1) Vehicle S/W Management list of U2 engine

Fig.2) "Essential Work After Component Replacement"

Fig.3) Lambda Sensor(LSU) Change

Fig.4) Complete

Ignition switch "OFF"

Connect GDS to Data Link Connector (DLC).

Ignition switch "ON" & Engine "OFF"

Perform "Essential Work After Component Replacement" in "Vehicle S/W Management" with GDS.

Select "Converter ASSY(LNT+DPF) Change"

Fig.1) Vehicle S/W Management list of U2 engine

Fig.2) "Essential Work After Component Replacement"

Fig.3) Converter ASSY(LNT+DPF) Change

Fig.4) Complete