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How To Read O2S Test Result Using Hand-Held Tester

  1. Connect the hand-held tester to the DLC3.
  2. On the tester screen, select the following menus: DIAGNOSIS / GARB OBDII / O2S TEST RESULT. A list of the O2S equipped on the vehicle will be displayed.
    Fig 1: Hand-Held Tester Screen - O2S Test Result
    G03057877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Select the desired O2S and press ENTER. The following screen will appear.
  4. Press HELP and H simultaneously. More information will appear.
  5. Example:
    1. The hand-held tester displays "17" as a value of the "TIME $81" (see the illustration on the left).
    2. Find the Conversion Factor value of "TIME $81" in the O2S TEST RESULT chart below. 0.3906 is specified for $81 in this chart.
    3. Multiply "17" in step ( 1) by 0.3906 (Conversion Factor) in the step ( 2).

      17x0.3906 = 6.6% 

    4. If the answer is within the standard value, the "TIME $81" can be confirmed to be normal.
      Fig 2: Hand-Held Tester Screen - Test Data
      G03057878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      O2S TEST RESULT Chart 

      O2S TEST RESULT Chart

      TEST ID Description of TEST DATA Conversion Factor Unit Standard Value
      $81 Percentage of monitoring time when the HO2S voltage is less than 0.05V Multiply 0.3906 % Within 60 %
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