LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2021 >> RX 450h Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes) (2 Of 8) >> SFI System >> DTC P0128: Thermostat [08/2018 - 08/2019] >> Confirmation Driving Pattern

Confirmation Driving Pattern

GTY660459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Stop the engine and allow it to soak.
  2. Connect the Techstream to the DLC3.
  3. Turn the power switch on (IG) and turn the Techstream on [A].
  4. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp and Intake Air.
  5. Check that "Coolant Temp" is 56°C (133°F) or less and "Intake Air" is between 0 and 35°C (32 and 95°F).
  6. Put the engine in inspection mode (maintenance mode).

    Refer to INSPECTION MODE PROCEDURE [10/2015 - ]

  7. Set the heater to MAX HOT with fresh air mode selected and turn the A/C off.
  8. Start the engine.
  9. With the engine running, drive the vehicle at 80 km/h (50 mph) for 15 minutes [B].
    WARNING:

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

    HINT: 

    If the engine stops, further depress the accelerator pedal to restart the engine.

  10. After "Coolant Temp" stabilizes, check that "Coolant Temp" is 75°C (167°F) or higher [C].

    HINT: 

    If "Coolant Temp" is less than 75°C (167°F) while driving the vehicle at 80 km/h (50 mph), inspect the cooling system and thermostat.