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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (1 Of 9) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (except Gasoline Model) >> Inspection [10/2022 - ] >> Procedure

Inspection [10/2022 - ]: Procedure

  1. INSPECT VSC OFF SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1124704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (VSC OFF Switch (Electric Parking Brake Switch Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      C29-4 (+) - C29-7 (E) Switch pushed Below 1 Ω Ω
      C29-4 (+) - C29-7 (E) Switch not pushed 10 kΩ or higher
  2. INSPECT BRAKE HOLD SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1124703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Brake Hold Switch (Electric Parking Brake Switch Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      C29-3 (+B) - C29-7 (E) Switch pushed Below 1 Ω Ω
      C29-3 (+B) - C29-7 (E) Switch not pushed 10 kΩ or higher
  3. INSPECT BRAKE CONTROL POWER SUPPLY ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1128202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Brake Control Power Supply Assembly)
      - -
      NOTE:

      If the integration control supply is installed, measure with the brake control power supply assembly connector connected and the integration control supply connector disconnected.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      H159-5 (SBIN) - Body ground* Always 10 kΩ or higher

      *: w/ Advanced Park (Remote Controlled)