On-Vehicle Inspection

2GR-FE EMISSION CONTROL: AIR FUEL RATIO SENSOR: ON-VEHICLE INSPECTION

1. INSPECT AIR FUEL RATIO SENSOR

(a) Connect Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Select the following menu items: Powertrain / Engine and ECT / Data List / AFS B1 S1 and O2S B1 S2.

(d) Warm up the A/F sensor with the engine speed at 2500 rpm for approximately 2 minutes.

(e) Maintain the engine speed at 2500 rpm and confirm that the displays of "A/FS B1 S1" and "A/FS B2 S1" are as shown in the illustration.





HINT
* The illustration may differ slightly from the display on Techstream.
* Only the Techstream displays the waveform of the A/F sensor.

(f) Confirm that the display of "O2S B1 S2" changes between 0 to 1 V with the engine speed at 2500 rpm.