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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Control System (1AR-FE) - DTC P0125 - P0500) >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different variant/trim than selected.

HINT:

Performing this confirmation pattern will activate the catalyst monitor. This is very useful for verifying the completion of a repair.

Fig 1: Vehicle Speed Driving Pattern
G06023160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off.
  6. Turn the ignition switch to ON and turn the Techstream on.
  7. Enter the following menus: Powertrain/Engine/Monitor.
  8. Check that Catalyst Efficiency/Status2 is Incomplete.
  9. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) [A].
  10. Drive the vehicle at between 40 and 70 mph (64 and 113 km/h) for at least 10 minutes or more [B].
  11. Those items will change to Complete after completing the driving pattern.
  12. Enter the following menus: Powertrain/Engine/Trouble Codes/Pending.
  13. Check if any DTCs (pending DTCs) are set.

    HINT:

    If Catalyst does not change to Complete, and no pending DTCs are stored, extend the driving time.