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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Automatic Transaxle System - Diagnostic Codes (1 Of 3)) >> Automatic Transaxle System >> DTC P0703-12: Brake Switch "B" Circuit Short to Battery [10/2022 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

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NOTE:
  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Perform the universal trip to clear permanent DTCs.

    Refer to DTC CHECK / CLEAR [10/2022 - ]

  • Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

    Refer to PRECAUTION [10/2022 - ]

  1. DATA LIST 
    NOTE:

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

    HINT: 

    Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    1. Warm up the engine.
    2. Turn the ignition switch off.
    3. Connect the GTS to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the GTS on.
    6. Enter the following menus: Powertrain / Transmission / Data List / Stop Light SW.
    7. Read the Data List according to the display on the GTS.

      Powertrain > Transmission > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stop Light SW Stop light switch status ON or OFF
      • ON: Brake pedal depressed
      • OFF: Brake pedal released
      -

      Powertrain > Transmission > Data List 

      Tester Display
      Stop Light SW