Air Fuel Ratio Sensor On-Vehicle Inspection

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
1Az-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


HINT:
The type of ignition switch on this model differs according to the specifications of the vehicle. For the expressions used in this section, refer to the "EXPRESSIONS OF IGNITION SWITCH" precaution (RAV4_ACA30 RM00000215G00HX.html).


1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Emission Control.Emission Control System.Air Fuel Ratio Sensor On-Vehicle Inspection

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Select the following menu items: POWERTRAIN / ENGINE AND ECT / DATA LIST / A/FS B1 S1.

  1. Warm up the A/F sensor with the engine speed at 2,500 rpm for approximately 2 minutes.

  1. Keep the engine speed at 2,500 rpm and confirm that the display of "A/FS B1 S1" is 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.


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Emission Control.Emission Control System.Air Fuel Ratio Sensor On-Vehicle Inspection

  1. Confirm that the display of "O2S B1 S2" changes between 0 to 1 V with the engine speed at 2,500 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 variation could not be verified, warm up the A/F sensor again. If it could not be verified even after warming up the sensor again, check for DTCs (RAV4_ACA30 RM000000WC3085X.html).