Last Modified: 01-27-2025 6.11:8.1.0 Doc ID: RM10000000260SE
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): P057111; Brake Switch "A" Circuit Short to Ground; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]

DTC

P057111

Brake Switch "A" Circuit Short to Ground

DESCRIPTION

The skid control ECU (brake actuator assembly) inputs the stop light signal and brake operation condition.

When the brake pedal is depressed and the stop light switch signal is not input, this DTC is output.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

P057111

Brake Switch "A" Circuit Short to Ground

Either of the following is detected:

  • When the +BS terminal voltage is 9.5 V or higher and the brake pedal load sensing switch (brake pedal support assembly) is ON, the stop light switch signal is not input continuously for 2 seconds or more with the master cylinder pressure at 2 MPa (20.4 kgf/cm2) or higher and the deceleration calculated from the vehicle speed at 0.2 G or higher.
  • After a master cylinder pressure of more than 1.764 MPa (18.0 kgf/cm2) is detected for 5 seconds or more continuously at a vehicle speed below 3 km/h (2 mph) with the stop light switch assembly off, the master cylinder pressure exceeds 1.764 MPa (18.0 kgf/cm2) for 1 second or more continuously while and the stop light switch assembly signal is not received when the vehicle decelerates from over 35 km/h (22 mph) to 3 km/h (2 mph).
  • Stop light switch assembly
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

WIRING DIAGRAM

Refer to DTC C13807E.

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CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK BRAKE PEDAL HEIGHT AND STOP LIGHT SWITCH ASSEMBLY INSTALLATION

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OK:

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

HINT:

If the on/off status of the stop light switch assembly and the pressure increase information from the master cylinder pressure sensor do not match due to an improperly installed brake pedal or stop light switch assembly, this DTC may be stored. Therefore, be sure to check the installation condition of the pedal and stop light switch assembly before inspecting the input signals and other related parts.

NG

ADJUST BRAKE PEDAL HEIGHT OR STOP LIGHT SWITCH ASSEMBLY INSTALLATION

OK

2.

CHECK STOP LIGHT OPERATION

(a) Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released.

OK:

Condition

Illumination Condition

Brake pedal depressed.

On

Brake pedal released.

Off
NG

GO TO STEP 9

OK

3.

READ VALUE USING GTS (STOP LIGHT SW)

(a) Check that the stop light switch display observed on the GTS change according to brake pedal operation.

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light SW

Stop light switch assembly status

(STP or STP2 terminal input)

OFF / ON

OFF: Brake pedal released

ON: Brake pedal depressed

HINT:

  • Stop light control relay off: STP terminal status displayed.
  • Stop light control relay on: STP2 terminal status displayed.

Chassis > Brake/EPB > Data List

Tester Display

Stop Light SW

OK:

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

NG

GO TO STEP 6

OK

4.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

5.

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

DTC P057111 is not output.

A

DTC P057111 is output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY

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6.

CHECK HARNESS AND CONNECTOR (STP TERMINAL)

(a) Turn the ignition switch off.

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))

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

OK:

The connector is securely connected.

(c) Disconnect the A140 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A140-11 (STP) - Body ground

Stop light switch assembly on (Brake pedal depressed)

8 to 14 V

A140-11 (STP) - Body ground

Stop light switch assembly off (Brake pedal released)

Below 1.5 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CLEAR DTC

(a) Reconnect the A140 skid control ECU (brake actuator assembly) connector.

(b) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(c) Turn the ignition switch off.

NEXT

8.

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

DTC P057111 is not output.

A

DTC P057111 is output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY

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9.

INSPECT STOP LIGHT SWITCH ASSEMBLY

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OK:

The stop light switch assembly is normal.

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY

OK

10.

CHECK HARNESS AND CONNECTOR (STP TERMINAL)

(a) Turn the ignition switch off.

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))

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

OK:

The connector is securely connected.

(c) Disconnect the A140 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A140-11 (STP) - Body ground

Stop light switch assembly on (Brake pedal depressed)

8 to 14 V

A140-11 (STP) - Body ground

Stop light switch assembly off (Brake pedal released)

Below 1.5 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

CLEAR DTC

(a) Reconnect the A140 skid control ECU (brake actuator assembly) connector.

(b) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(c) Turn the ignition switch off.

NEXT

12.

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

DTC P057111 is not output.

A

DTC P057111 is output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY

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