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Home >> Toyota >> 2014 >> Prius Four >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0300 - P0657)) (Except Plug-In) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) [10/2013 - ] >> Confirmation Driving Pattern
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Confirmation Driving Pattern

HINT: 

Fig 1: Catalyst Efficiency Monitor Driving Pattern
GTY380576Courtesy 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 (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and 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 / Current Monitor.
  8. Check that Catalyst Efficiency / Current is Incomplete.
  9. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [10/2013 - ] .
  10. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with park (P) selected [A].

    HINT: 

    In order to keep the idle stable, turn the A/C and all other electric loads off and do not perform any shift operations.

  11. Drive the vehicle at approximately 75 km/h (47 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.

  12. With the shift lever in B, drive the vehicle at 75 km/h (47 mph), and then decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut [C].
    WARNING:

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

  13. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor / RL F/C B1S2 [D].
  14. Check the Test Value for RL F/C B1S2.

    HINT: 

    • If Test Value displays a value larger than 0, perform the following procedure, as the O2 Sensor monitor is finished.
    • If Test Value displays 0, perform step [C] until it displays a value larger than 0, as the O2 Sensor monitor is not finished.
  15. Turn the power switch off and wait for at least 30 seconds [F].
  16. Turn the power switch on (IG) and turn the Techstream on.
  17. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [G].
  18. Drive the vehicle at approximately 75 km/h (47 mph) for 10 minutes or more [H].
    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.
  19. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [I].
  20. Check if any DTCs are stored.

    HINT: 

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

  21. Drive the vehicle at approximately 100 km/h (62 mph) for 10 minutes or more [J].
    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.
  22. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [K].
  23. Check if any DTCs are stored.

    HINT: 

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

  24. If no DTC is output, perform a universal trip and check for permanent DTCs. Refer to DTC CHECK / CLEAR [10/2013 - ] .

    HINT: 

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

for Mexico Models: 

HINT: 

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

Fig 2: Identifying Engine Switch / Scantool Operations Graph
GTY379035Courtesy 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 (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and 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 / Current Monitor.
  8. Check that Catalyst Efficiency / Current is Incomplete.
  9. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [10/2013 - ] .
  10. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with the park (P) selected [A].
  11. Drive the vehicle at approximately 75 km/h (47 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.

  12. Turn the power switch off and wait for at least 30 seconds [C].
  13. Turn the power switch on (IG) and turn the Techstream on.
  14. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [10/2013 - ] .
  15. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [D].
  16. Drive the vehicle at approximately 75 km/h (42 mph) for 10 minutes or more [E].
    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 change to Complete as the Catalyst Efficiency monitor operates.
  17. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [F].
  18. Check if any DTCs (pending DTCs) are stored.

    HINT: 

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

  19. Drive the vehicle at a speed 100 km/h (62 mph) for 10 minutes or more [G].
    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.
  20. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [H].
  21. Check if any DTCs (pending DTCs) are stored.

    HINT: 

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

  22. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to DTC CHECK / CLEAR [10/2013 - ] .

    HINT: 

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.
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