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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Control System - Diagnostic Codes (06 Of 10)) >> SFI SYSTEM (for Gasoline Model) >> DTC P0504-2B: Brake Switch "A"/"B" Signal Cross Coupled [10/2022 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

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.
NOTE:

Inspect the fuses for circuits related to this system before performing the following procedure.

HINT: 

Stop light switch assembly conditions can be checked using the GTS.

  1. Enter the following menus: Powertrain / Engine / Data List / Stop Light SW.
  2. Check the Data List indication when the brake pedal is depressed and released.
    Brake Pedal Operation Stop Light SW
    Depressed ON
    Released OFF
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