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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Control System - Diagnostic Codes (2 Of 6)) >> SFI System >> DTC P0115-2A: Engine Coolant Temperature Sensor 1 Signal Stuck in Range [12/2023 - ] >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

GTY1228697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for at least 30 seconds.
  3. Turn the ignition switch ON [A].
  4. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
  5. Check that the engine coolant temperature is 60°C (140°F) or less.
  6. Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

    Refer to INSPECTION MODE PROCEDURE [09/2023 - ]

  7. Start the engine and idle it for 5 minutes or more [B].

    HINT: 

    If the engine coolant temperature does not change by 5°C (9°F) or higher, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure.

  8. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  9. Read the pending DTCs.

    HINT: 

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
  10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  11. Input the DTC: P0115-2A.
  12. Check the DTC judgment result.

    HINT: 

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system is malfunctioning.
    • If the judgment result shows INCOMPLETE, perform steps [D] and [E].
  13. With the engine running, drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more [D].
    WARNING:

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

    HINT: 

    • Press the EV/HV mode selection switch to select HV mode.
    • In the event of the drive pattern being interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed.
    • If the engine stops, further depress the accelerator pedal to restart the engine.
  14. Check the DTC judgment result again [E].

    HINT: 

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system is malfunctioning.
    • If the judgment result shows INCOMPLETE, perform steps [D] and [E].
    • [A] to [E]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.