Air Fuel Ratio Sensor On-Vehicle Inspection

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
2Gr-Fe Emission Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM

Air Fuel Ratio Sensor -- On-Vehicle Inspection



1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Select the following menu items: Data List / AFS B1 S1, AFS B2 S1, O2S B1 S2 and O2S B2 S2.

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



    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Gr-Fe Emission Control.Emission Control System.Air Fuel Ratio Sensor On-Vehicle Inspection

  1. Maintain the engine speed at 2500 rpm and confirm that the displays of "AFS B1 S1" and "AFS B2 S1" are as shown in the illustration.

    HINT:
    1. The illustration may slightly differ from the display on the intelligent tester.
    2. Only the intelligent tester displays the waveform of the A/F sensor.

  1. Confirm that the displays of "O2S B1 S2" and "O2S B2 S2" change between 0 and 1 V with the engine speed at 2500 rpm.

    OK:
    The voltage output oscillates more than 8 times in 10 seconds.
    NOTICE:
    1. Perform the check immediately after warming the engine up.
    2. If the voltage output does not oscillate as specified, warm up the A/F sensor again. If the output is not as specified even after warming up the sensor again, check for DTCs (RAV4_ACA30 RM000000PDK0AIX.html).