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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 147 (Motor Generator Control System - Diagnostic Codes (3 Of 5)) >> MOTOR GENERATOR CONTROL SYSTEM (for THS-HEV Model) >> DTC P0A94-9E: DC/DC Converter Stuck On; DTC P0D33-19: DC/DC Converter Circuit Current Above Threshold [10/2022 - ] >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different car, the 2025 Lexus RX 350h, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Turn the ignition switch to ON and wait for 5 seconds or more. [*1]
  4. Turn the ignition switch to ON (READY) and wait for 5 seconds or more. [*2]
  5. Press the HV EV CHG HOLD mode switch to enter HV drive mode. [*3]
  6. Depress the accelerator pedal of the vehicle with the engine stopped and the shift state in park (P) to start the engine. [*4]
    NOTE:

    As the state of charge of the HV battery may be low after driving in fail-safe mode, it will automatically be charged for 5 to 10 minutes with ignition switch ON (READY) after repairs have been performed.

    HINT: 

    • Check that there are no abnormalities (abnormal sounds, coolant leaks, etc.).
    • [*1] to [*4]: Normal judgment procedure.

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

  7. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
  8. Check the DTC judgment result.

    HINT: 

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.