Connect GDS to Data Link Connector (DLC).

Ignition switch "ON"

Monitor "Diagnostic Trouble Codes(DTC)" with GDS.

Is any the DTCs that can affect the lambda sensor signal displayed such as injectors or air leak related?

	▶ Inspect and repair the fault that can affect lambda sensor signal first, and then re-do this troubleshooting guide steps.
	▶ Go to "Wiring Inspection" procedure.