Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Brake Pedal Switch "A" Stuck On (C00409E,C00409F)

Toyota Corolla Cross (2022-2024) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Gasoline Model) / Brake Pedal Switch "A" Stuck On (C00409E,C00409F)

DESCRIPTION

Refer to DTC C004013.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C00409E

Brake Pedal Switch "A" Stuck On

Either of the following is detected:

  • With the stop light switch off, the brake pedal load sensing switch on, and the master cylinder pressure less than 0.7 MPa (7.13 kgf/cm2, 101 psi), the vehicle acceleration rate is more than -0.8 m/s2 for 10 seconds or more. (Only when the engine is running and booster malfunctions are not detected.)
  • Condition which the brake pedal load sensing switch remains on while the vehicle speed increases from 0 km/h (0 mph) to 30 km/h (19 mph) occurs 5 times in succession.
  • Brake pedal load sensing switch (brake pedal support assembly)
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

C00409F

Brake Pedal Switch "A" Stuck Off

Either of the following is detected:

  • With the stop light switch on, the brake pedal load sensing switch off, and the master cylinder pressure more than 6 MPa (61.2 kgf/ cm2, 870 psi), the vehicle acceleration rate is less than -4 m/s2 for 1 second or more.
  • With the stop light switch on, the brake pedal load sensing switch off, and the master cylinder pressure more than 6 MPa (61.2 kgf/ cm2, 870 psi), the vehicle speed is 0 km/h (0 mph) for 5 seconds or more.
  • Brake pedal load sensing switch (brake pedal support assembly)
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

WIRING DIAGRAM

Refer to DTC C004013

Click here

CAUTION / NOTICE / HINT

HINT:

When C117B62, P057112 and/or P057113 is output together with C00409E and/or C00409F, inspect and repair the trouble areas indicated by C117B62, P057112 and/or P057113 first.

  • C117B62: Click here
  • P057112: Click here
  • P057113: Click here

PROCEDURE

1.

READ VALUE USING GTS (STOP LIGHT SW AND BRAKE PEDAL LOAD SENSING SW)

(a) Check the Data List using the GTS.

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light SW

Stop light switch assembly (STP terminal input)

OFF / ON

OFF: Brake pedal released

ON: Brake pedal depressed

HINT:

The brake pedal state is determined using the voltage at terminal STP

Brake Pedal Load Sensing SW

Brake pedal load sensing switch (brake pedal support assembly)

OFF / ON

OFF: Brake pedal load sensing switch (brake pedal support assembly) OFF

ON: Brake pedal load sensing switch (brake pedal support assembly) ON

-

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

OK:

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

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

OK:

First the stop light switch turns on, and then the brake pedal load sensing switch (brake pedal support assembly) turns on.

Result

Proceed to

OK

A

NG (Turning on of the brake pedal load sensing switch (brake pedal support assembly) is not confirmed.)

B

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

C
B

GO TO STEP 4

C

GO TO STEP 6

A

2.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

3.

RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

C00409E and C00409F are not output

A

C00409E and C00409F are output

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY

4.

INSPECT BRAKE PEDAL LOAD SENSING SWITCH

(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 A167 brake pedal load sensing switch (brake pedal support assembly) connector.

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

Component without harness connected

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (FSW+) - 1 (FSW-)

Brake pedal load sensing switch off

(Brake pedal depressed)

950 to 1050 Ω

2 (FSW+) - 1 (FSW-)

Brake pedal load sensing switch on

(Brake pedal released)

203 to 223 Ω
NG

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY

OK

5.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - 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 A151 skid control ECU (brake actuator assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A151-10 (FSW+) - A167-2 (FSW+)

Always

Below 1 Ω

A151-10 (FSW+) - Body ground

Always

10 kΩ or higher

A167-2 (FSW+) - Body ground

Always

10 kΩ or higher

A167-1 (FSW-) - Body ground

1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal

Below 1 Ω
OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

CHECK BRAKE PEDAL AND STOP LIGHT SWITCH ASSEMBLY INSTALLATION

(a) Turn the ignition switch off.

(b) Check the brake pedal height.

Click here

(c) Check the stop light switch assembly installation.

Click here

OK:

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

OK

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY

NG

ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH ASSEMBLY

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