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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 118 (Engine Control System - Diagnostic Codes (07 Of 10)) >> SFI SYSTEM (for Gasoline Model) >> DTC P0703-12: Brake Switch "B" Circuit Short to Battery [10/2022 - ] >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
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  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 to ON.
  4. Wait 5 seconds [A].
  5. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  6. 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.
  7. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  8. Input the DTC: P0703-12.
  9. Check the DTC judgment result.

    HINT: 

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [C] through [E].
  10. Start the engine [C].
  11. Accelerate the vehicle to 30 km/h (18.65 mph) or more, depress the brake pedal and decelerate the vehicle to 3 km/h (1.86 mph) or less [D]. Repeat step [D] 5 times.
    WARNING:

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

  12. Enter the following menus: Powertrain / Engine / Trouble Codes [E].
  13. Read the pending DTCs.

    HINT: 

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTCs are not output, perform the following procedure.
  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  15. Input the DTC: P0703-12.
  16. Check the DTC judgment result.

    HINT: 

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.