Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002BENO
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [03/2023 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): P057162; Brake Switch "A" Signal Compare Failure; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [03/2023 -        ]

DTC

P057162

Brake Switch "A" Signal Compare Failure

DESCRIPTION

This DTC is stored when the brake signal sent via direct line and the brake signal sent via CAN communication do not match.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

P057162

Brake Switch "A" Signal Compare Failure

The brake signal sent via direct line and the brake signal sent via CAN communication do not match. (1-trip detection logic*)
  • Electronically controlled brake system
  • Stop light switch assembly
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector

DTC Output Confirmation Operation:

  • Connect the cable to the negative (-) auxiliary battery terminal, release the brake pedal and wait at least 20 seconds. Then depress the brake pedal for 20 seconds or more.
  • *: Only detected while a malfunction is present and the ignition switch is ON.

Vehicle Condition and Fail-safe Function when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected
  • If there is a malfunction when the brake signal sent via direct line is on, the engine can be started by pressing the engine switch with the brake pedal released.
  • If there is a malfunction when the brake signal sent via direct line is off, the engine cannot be started by pressing the engine switch with the brake pedal depressed.
    • With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine does not start (the key indicator display is not displayed on the multi-information display). However, the engine can be started by turning the ignition switch to ACC and then pressing and holding it.

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Related Data List and Active Test Items

DTC No.

Data List and Active Test

P057162

Power Source Control

  • Stop Light Switch

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.

    Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • When disconnecting the cable from the negative (-) auxiliary battery terminal, some systems need to be initialized after the cable is reconnected.
  • Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

READ VALUE USING GTS (STOP LIGHT SWITCH)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light Switch

State of brake pedal

OFF or ON

OFF: Brake pedal released
  • Use this item to determine if the stop light switch assembly is malfunctioning.
  • The engine cannot be started when this item is OFF.
  • If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display

Stop Light Switch

OK:

The GTS display changes correctly in response to the brake pedal operation.

Result

Proceed to

The value of Stop Light Switch is OFF

A

The value of Stop Light Switch is not OFF

B
B

GO TO STEP 3

A

2.

READ VALUE USING GTS (STOP LIGHT SWITCH)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light Switch

State of brake pedal

OFF or ON

ON: Brake pedal depressed
  • Use this item to determine if the stop light switch assembly is malfunctioning.
  • The engine cannot be started when this item is OFF.
  • If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display

Stop Light Switch

OK:

The GTS display changes correctly in response to the brake pedal operation.

Result

Proceed to

The value of Stop Light Switch is ON

A

The value of Stop Light Switch is not ON

B
A

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

w/ Electric Parking Brake System: Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): HOW TO PROCEED WITH TROUBLESHOOTING

w/o Electric Parking Brake System: Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): HOW TO PROCEED WITH TROUBLESHOOTING

B

3.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

Pre-procedure1

(a) Disconnect the O175 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the A53 stop light switch assembly connector.

(c) Disconnect the A51 skid control ECU (brake actuator assembly) connector.

(d) Disconnect the A47*1 or A178*2 ECM connector.

  • *1: for M20A-FKS (except K121 CVT)
  • *2: for M20A-FKS (K121 CVT)

(e) Disconnect the I17 shift lock control unit assembly connector.

(f) Disconnect the C80 TCM connector.

Procedure1

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O175-21 (STP1) - A53-3 (L)

Always

Below 1 Ω

Post-procedure1

(h) None

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Pre-procedure1

(a) Connect the O175 certification ECU (smart key ECU assembly) connector.

(b) Connect the A53 stop light switch assembly connector.

Procedure1

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O175-21 (STP1) - Body ground

Brake pedal released

1 V or less

O175-21 (STP1) - Body ground

Brake pedal depressed

9 V or higher

Result:

Proceed to

OK

NG

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

Post-procedure1

(d) None

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY