O2S Test Result

O2S TEST RESULT

Introduction

O2S TEST RESULT refers to the results of the HO2S monitor. Various states (Test Item) of the HO2S are monitored by the ECM. The value of the Test Items (Test Value) can be read using the hand-held tester or the generic OBD II scan tool.

However, the Test Value is the latest "Snapshot" of the vehicle's data from the last time it was driven and a monitor was run. The date is not dynamic. The Test Values are cleared when the ignition switch is turned OFF.




The Test Items are described in the table of the "Inspection Procedure" from the sections for DTCs P0130, P0133 and P0136.
- Test ID (a code applied to each Test Item)
- Test Item
- Description (description of Test Item)
- Unit Conversion (when Unit Conversion has a value in the table, multiply the Test Value displayed on the scan tool by the Unit Conversion value. The result will be the required value.)
- Unit
- Standard Value

If the Test Value is out of the standard value, the HO2S is malfunctioning. If it is within standard value, the HO2S is functioning normally. However, if the Test Value is on the borderline of the standard value, the HO2S may malfunction soon.

Procedure of O2S TEST RESULT using hand-held tester

a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch ON.
c. Turn ON the tester.
d. Clear the DTCs.
e. Drive the vehicle according to the HO2S Monitor Drive Pattern to run the HO2S monitor.

CAUTION: Strict observance of posted speed limits, traffic laws, and road conditions are required.




f. Enter the hand-held tester's menus: DIAGNOSIS, CARB OBD II and O2S TEST RESULT.
g. A list of the O2S equipped on the vehicle will be displayed.

HINT: The monitor result of the A/F sensor is not displayed. If you select "BANK 1 - SENSOR 1" or "BANK 2 - SENSOR 1" for the vehicle equipped with the A/F sensor, the hand-held tester will display "NO PARAMETER TO DISPLAY".




g. Select the desired HO2S and press ENTER. The screen will appear.

NOTE: Before the HO2S monitor completes or after the ignition switch is turned OFF, the hand-held tester displays the viewable upper limit or a lower limit of the test value (ex: 0 V, 1.275 V, 0 s (seconds), 10.2 s, 0 and 255).

Procedure of reading Test Value (Example)




1. The hand-held tester displays "17" as the value of "Time $81" (see the illustration).

O2S Test Result Table:

2. Find the Conversion Factor value of "Time $81" in the O2S TEST RESULT chart. 0.3906 is specified for Time $81 in this chart.
3. Multiply "17" in step (a) by 0.3906.
17 x 0.3906 = 6.6 %

If the answer is within the standard value of TEST LIMIT, "Time $81" can be confirmed to be normal.

If the Test Value is on the borderline of the standard value, the Test Item may malfunction soon.