Toyota Venza manuals

Toyota Venza: Brake Pedal Load Sensing Switch (C1267/67)

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 Code

DTC Detection Condition

Trouble Area

C1267/67

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 ignition switch is turned to ON, 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 km/h (0 mph) to 30 km/h (18 mph), 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 km/h (0 mph) for 5 seconds or more.
  • Brake pedal load sensing switch
  • Brake pedal load sensing switch circuit

WIRING DIAGRAM


CAUTION / NOTICE / HINT

HINT:

When C1249/49 is output together with C1267/67, inspect and repair the trouble areas indicated by C1249/49 first (See page ).


PROCEDURE

1.

READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH AND BRAKE PEDAL LOAD SENSING SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Select the Data List on the Techstream (See page ).


ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Stop Light SW

Stop light switch / ON or OFF

ON: Brake pedal depressed

OFF: Brake pedal released

-

Brake Pedal Load Sensing SW

Brake pedal load sensing switch / ON or OFF

ON: Brake pedal depressed beyond the specified point

OFF: Brake pedal not depressed beyond the specified point

-

(d) Check that the stop light switch display and brake pedal load sensing switch display observed on the Techstream change according to brake pedal operation.

OK:

The Techstream displays ON or OFF according to brake pedal operation.

(e) Slowly depress the brake pedal, and check when the stop light switch and brake pedal load sensing switch turn on.

OK:

First the stop light switch should turn on, and then the brake pedal load sensing switch should turn on.

Result

Proceed to

OK

A

NG (The brake pedal load sensing switch does not turn on)

B

NG (The brake pedal load sensing switch turns on first)

C


B

GO TO STEP 3


C

GO TO STEP 5


A

2.

RECONFIRM DTC

(a) Turn the ignition switch off.

(b) Clear the DTCs (See page ).


(c) Start the engine.

(d) Perform a road test.

(e) Check if the same DTC is recorded (See page ).


Result

Proceed to

DTC (C1267/67) is not output

A

DTC (C1267/67) is output

B


A

CHECK FOR INTERMITTENT PROBLEMS


B

REPLACE BRAKE ACTUATOR ASSEMBLY

3.

INSPECT BRAKE PEDAL LOAD SENSING SWITCH


NOTICE:

  • Do not remove the brake pedal load sensing switch from the brake pedal support assembly.
  • When there is a malfunction in the brake pedal load sensing switch, replace the brake pedal support assembly.

(a) Turn the ignition switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.

(c) Disconnect the brake pedal load sensing switch connector.

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

2 (FSW+) - 1 (GND)

Brake pedal load sensing switch off

(Brake pedal depressed)

950 to 1050 Ω

2 (FSW+) - 1 (GND)

Brake pedal load sensing switch on

(Brake pedal released)

203 to 223 Ω


NG

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY (BRAKE PEDAL LOAD SENSING SWITCH)


OK

4.

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

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.


(b) Disconnect the skid control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A42-20 (FSW+) - A36-2 (FSW+)

Always

Below 1 Ω

A42-20 (FSW+) - Body ground

Always

10 kΩ or higher

A36-1 (GND) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to Brake Actuator (Skid Control ECU))

*2

Front view of wire harness connector

(to Brake Pedal Support Assembly (Brake Pedal Load Sensing Switch))


OK

REPLACE BRAKE ACTUATOR ASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

CHECK BRAKE PEDAL AND STOP LIGHT SWITCH INSTALLATION

(a) Turn the ignition switch off.

(b) Check the brake pedal height and stop light switch installation (See page ).


OK:

The brake pedal height and stop light switch installation are normal.


OK

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY (BRAKE PEDAL LOAD SENSING SWITCH)


NG

ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH

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