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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 122 (Electronic A/T Shift Lever System - Diagnostic Codes (1 Of 2)) >> Electronic Shift Lever System >> DTC P1779-49: Gear Shift Control Module Backup Power Supply Internal Electronic Failure [10/2022 - 08/2023] >> 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.

HINT: 

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch to ON and wait for 10 seconds or more.
  3. Turn the ignition switch off and wait for 10 minutes or more.
  4. Turn the ignition switch to ON.
  5. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  6. 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 driving pattern again.