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Home >> Toyota >> 2009 >> Corolla S, 1.8 L, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - U250E) >> Automatic Transaxle System >> DTC P0724 Brake Switch "B" Circuit High >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING DATA LIST 

    HINT:

    Using Techstream 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 Techstream to the DLC3.
    4. Turn the ignition switch to the on position.
    5. Turn on the tester.
    6. Select the item "Powertrain/Engine and ECT/Data List".
    7. According to the display on the tester, read the "Data List".
    DATA LIST

    Tester Display Measurement Item/Range (display) Normal Condition Diagnostic Note
    Stop Light Switch Stop light Switch Status/ON or OFF Brake pedal is depressed: ON
    Brake pedal is released: OFF    		 -
    NOTE: In the table below, the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.

    Result 

    RESULT CHART

    Result Proceed to
    NG A
    OK B

    B: Go to step  3

    A: Go to next step 

  2. INSPECT STOP LIGHT SWITCH ASSEMBLY 
    1. Remove the stop light switch assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Switch position Specified Condition
      1 - 2 Switch pin free Below 1 Ω
      Switch pin pushed In 10 kΩ or higher
      3 - 4 Switch pin free 10 kΩ or higher
      Switch pin pushed in Below 1 Ω

      NG: REPLACE STOP LIGHT SWITCH ASSEMBLY  (See STOP LIGHT SWITCH )

      Fig 1: Inspecting Stop Light Switch Assembly
      G06011372Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) 
    1. Install the stop light switch assembly.
    2. Measure the voltage according to the value(s) in the table below when the brake pedal is depressed and released.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Condition Tester Connection Specified Condition
      A50-36 (STP) - Body ground Brake pedal is depressed 11 to 14 V
      Brake pedal is released Below 1 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 2: Identifying A50 Connector Terminals
      G06011373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE ECM  (See REMOVAL )

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