Circuit Inspection

Item	Normal value	Prerequisite condition	(+) Probe	(-) Probe
Signal Circuit: Voltage (Short to battery) Nernst Voltage Circuit Virtual Ground Output Circuit Current Adjust Circuit Current Pump Circuit	Approx. 0V	Ignition switch: ON Sensor connector: Disconnected	Signal Terminal	Chassis ground
Signal Circuit: Resistance (Short to ground) Nernst Voltage Circuit Virtual Ground Output Circuit Current Adjust Circuit Current Pump Circuit	Infinite	Ignition switch: OFF Sensor, ECM connector: Disconnected	Signal Terminal	Chassis ground
Signal Circuit: Resistance (Open) Nernst Voltage Circuit Virtual Ground Output Circuit Current Adjust Circuit Current Pump Circuit	Approx. below 1Ω	Ignition switch: OFF Sensor, ECM connector: Disconnected	Signal Terminal Nernst Voltage Circuit Virtual Ground Output Circuit Current Adjust Circuit Current Pump Circuit (HO2S (S1) connector)	Signal Terminal Nernst Voltage Circuit Virtual Ground Output Circuit Current Adjust Circuit Current Pump Circuit (ECM connector)

Is the result within specifications?
YES
- Go to next step as below.
NO
- Repair relevant component(s) as necessary and then go to "VERIFICATION OF VEHICLE REPAIR ".