Dtc C1267/67 Brake Pedal Load Sensing Switch

Brake. Lexus Is250, Is220D. Gse20 Ale20
Brake Control. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER (BRAKE PEDAL LOAD SENSING SWITCH)

INSPECT BRAKE PEDAL LOAD SENSING SWITCH

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL LOAD SENSING SWITCH)

RECONFIRM DTC

DTC C1267/67 Brake Pedal Load Sensing Switch


DESCRIPTION

The brake pedal load sensing switch is turned on when the brake pedal is depressed with force exceeding a predetermined level.
The skid control ECU detects if the brake pedal is depressed or not via this circuit.

DTC No.
DTC Detection Condition
Trouble Area
C1267/67
When any of the following is detected:
  1. An open or short in the brake pedal load sensing switch continues for 0.3 seconds or more.
  2. Immediately after the engine switch is turned on (IG), the brake pedal load sensing switch is ON and the stop light switch is OFF for 10 seconds or more.
  3. While the vehicle speed changes from 0 mph (0 km/h) to 18 mph (30 km/h), the condition that the brake pedal load sensing switch remains ON occurs 5 times in succession.
  4. With the stop light switch ON, the brake pedal load sensing switch OFF, and the master cylinder pressure 6 Mpa or more, the deceleration is 0.4 G or more for 1 second or more.
  5. With the stop light switch ON, the brake pedal load sensing switch OFF, and the master cylinder pressure 6 Mpa or more, the vehicle speed is 0 mph (0 km/h) for 5 seconds or more.
  1. Brake pedal load sensing switch
  2. Brake pedal load sensing switch circuit

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C1267/67 Brake Pedal Load Sensing Switch


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (Click here).
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.

  1. Start the engine.

  1. Select the Data List mode on the intelligent tester.

    ABS / VSC:
    Item (Display)
    		Measurement Item / Range (Display)
    		Normal Condition
    Brake Pedal Load Sensing SW
    		Brake pedal load sensing switch / ON or OFF
    		ON : Brake pedal depressed
    OFF : Brake pedal released

  1. Read the value of the brake pedal load sensing switch displayed on the intelligent tester when depressing and releasing the brake pedal.

    OK:

    Condition
    		Display
    Brake pedal depressed
    		ON
    Brake pedal released
    		OFF


OK
Go to step 4
NG


2.INSPECT BRAKE PEDAL LOAD SENSING SWITCH

Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C1267/67 Brake Pedal Load Sensing Switch


Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C1267/67 Brake Pedal Load Sensing Switch

NOTICE:
  1. Do not remove the brake pedal load sensing switch from the brake pedal sub-assembly.
  2. When there is a malfunction in the brake pedal load sensing switch, replace the brake pedal sub-assembly.

  1. Turn the engine switch off.

  1. Disconnect the brake pedal load sensing switch connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:

    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


3.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL LOAD SENSING SWITCH)


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C1267/67 Brake Pedal Load Sensing Switch

  1. Disconnect the skid control ECU connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A14-7 (FSW+) - A23-2 (FSW+)
    		Always
    		Below 1 Ω
    A14-7 (FSW+) - Body ground
    		Always
    		 10 kΩ or higher
    A23-1 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.RECONFIRM DTC

  1. Reconnect the skid control ECU connector and the brake pedal load sensing switch connector.

  1. Clear the DTC (Click here).

  1. Check if the same DTC is recorded (Click here).

    Result:

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


B
REPLACE BRAKE ACTUATOR ASSEMBLY
A

USE SIMULATION METHOD TO CHECK