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Home >> Lexus >> 2011 >> HS 250h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010 - P0420)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> Confirmation Driving Pattern
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Confirmation Driving Pattern

HINT: 

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

Fig 1: Identifying Ignition Switch / Scantool Operation Graph
GTY349414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
  5. Turn the power switch off wait for at least 30 seconds.
  6. Turn the power switch on (IG) and turn the Techstream on.
  7. Enter the following menus: Powertrain / Engine and ECT / Monitor.
  8. Check that Catalyst Efficiency / Status2 is Incomplete.
  9. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
  10. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) [A].
  11. Drive the vehicle at approximately 60 km/h (38 mph) for 10 minutes or more [B].
    WARNING:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT: 

    • Drive the vehicle while keeping the engine load as constant as possible.
    • The monitor item will change to Complete as the catalyst efficiency monitor operates [C].
  12. Enter the following menus: Powertrain / Engine and ECT / Pending.
  13. Check if any DTCs (pending DTCs) are stored.

    HINT: 

    If the monitor does not change to Complete, and no pending DTCs are stored, perform the following procedure.

  14. Drive the vehicle at a speed between 75 and 100 km/h (47 and 63 mph) for 10 minutes or more [D].
    NOTE:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT: 

    • Drive the vehicle while keeping the engine load as constant as possible.
    • The monitor item will change to Complete as the catalyst efficiency monitor operates [E].
  15. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
  16. 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.