Toyota Corolla (E120): Oxygen / af sensor heater monitor

  1. Preconditions

The monitor will not run unless:

  • mil is off
  1.  drive pattern
  1.  connect the obd ii scan tool to the dlc3 to check monitor status and preconditions.
  2.  Start the engine and allow it to idle for 9 minutes.
  3.  Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes.
  4.  If the readiness status dose not switch to complete, make sure that the preconditions are met and the ignition switch turned off and then repeat steps (2) and (3).
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    Other materials:

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    How to proceed with troubleshooting
    The hand–held tester can be used at step 3, 4, 5, 7, 10. 1 Vehicle brought to workshop 2 Customer problem analysis 3 Connect hand–held tester to dlc3 Hint: if the display indicates a communication fault in the tool, inspect dlc3. 4 Check dtc and freeze frame data Hint: record or pr ...