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Home >> Lexus >> 2006 >> IS 250 RWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Brake Control) >> VEHICLE STABILITY CONTROL SYSTEM (w/ VDIM) >> DTC C1267/67 Brake Pedal Load Sensing Switch >> Wiring Diagram

DTC C1267/67 Brake Pedal Load Sensing Switch: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Wiring Diagram
G04052132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: When replacing the skid control ECU, perform zero point calibration (See CALIBRATION  ).

HINT:

If C1249/49 is output, repair it before repairing C1267/67 based on the flow chart below.

  1. READ VALUE OF INTELLIGENT TESTER (BRAKE PEDAL LOAD SENSING SWITCH) 
    1. Connect the intelligent tester to the DLC3.
    2. Start the engine.
    3. Select the Data List mode on the intelligent tester.

      ABS / VSC: 

      NORMAL CONDITION CHART

      Item (Display) Measurement Item / Range (Display) Normal Condition
      BRK PEDAL SW Brake pedal load sensing switch / ON or OFF ON : Depressed brake pedal
      OFF : Released brake pedal
    4. Read the value of the brake pedal load sensing switch displayed on the intelligent tester when depressing and releasing the brake pedal.

      OK 

      CONDITION CHART

      Condition Display
      Brake pedal depressed ON
      Brake pedal released OFF

    OK : Go to step   4 

    NG : GO TO NEXT STEP 

  2. INSPECT BRAKE PEDAL LOAD SENSING SWITCH 
    Fig 2: Inspecting Brake Pedal Load Sensing Switch
    G04052133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • Do not remove the brake pedal load sensing switch from the brake pedal sub-assembly.
    • When there is a malfunction in the brake pedal load sensing switch, replace the brake pedal subassembly.
    1. Turn the engine switch off.
    2. Disconnect the brake pedal load sensing switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      2 (FSW+) - 1 (GND) Brake pedal depressed (OFF) 0.9 to 1.1 kΩ
      2 (FSW+) - 1 (GND) Brake pedal released (ON) 192 to 234 Ω

    NG : REPLACE BRAKE PEDAL SUB-ASSEMBLY (BRAKE PEDAL LOAD SENSING SWITCH) 

    OK : GO TO NEXT STEP 

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL LOAD SENSING SWITCH) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      A35-18 (FSW+) - A23-2 (FSW+) Always Below 1 Ω
      A35-18 (FSW+) - Body ground Always 10 kΩ or higher
      A23-1 (GND) - Body ground Always Below 1 Ω

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Checking Harness And Connector (Skid Control ECU - Brake Pedal Load Sensing Switch)
    G04052134Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : GO TO NEXT STEP 

  4. RECONFIRM DTC 
    1. Reconnect the skid control ECU connector and the brake pedal load sensing switch connector.
    2. Clear the DTC (See DTC CHECK / CLEAR  ).
    3. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      CONDITION CHART

      Condition Proceed to
      DTC (C1267/67) is not output A
      DTC (C1267/67) is output B

    B : REPLACE SKID CONTROL ECU 

    A : USE SIMULATION METHOD TO CHECK 

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