- Repair or replacement.
- Turn the ignition switch to ON.
- Drive the vehicle and depress the brake pedal 2 or 3 times to clear the warning lights.
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002B9RI |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [03/2023 - 08/2023] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): P057112; Brake Switch "A" Circuit Short to Battery; 2023 MY Corolla Corolla Hatchback GR Corolla [03/2023 - 08/2023] | ||
|
DTC |
P057112 |
Brake Switch "A" Circuit Short to Battery |
DESCRIPTION
The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied.
DTCs may be stored if either of the following occurs:
- Stop light switch assembly stuck on malfunction.
- The accelerator and brake pedals are depressed simultaneously.*
HINT:
*: The skid control ECU (brake actuator assembly) may store this DTC upon judging that a stuck on malfunction has occurred when the accelerator pedal and brake pedal are depressed simultaneously. However, this does not indicate a malfunction.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
P057112 |
Brake Switch "A" Circuit Short to Battery |
The vehicle speed is 10 km/h (6 mph) or more, the accelerator pedal is depressed, the master cylinder pressure is 0.5 MPa (5.1 kgf/cm2, 72.5 psi) or less, and the stop light switch assembly is on for 60 seconds or more. |
|
*: w/ Smart Entry and Start System
WIRING DIAGRAM
Refer to DTC C117B62.
Click here
![2023 MY Corolla Corolla Hatchback GR Corolla [03/2023 - 08/2023]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C117B62; Brake Pressure Sensor "A" / Brake Switch "A" Signal Compare Failure+](/t3Portal/stylegraphics/info.gif)
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.
-
DTC precaution
Click here
Procedure to clear warning lights (When not clearing DTCs)
Procedure
PROCEDURE
|
1. |
CHECK VEHICLE |
(a) Check the vehicle specification.
|
Result |
Proceed to |
|---|---|
|
for TMC Made |
A |
|
for TMMMS Made |
B |
| B |
|
|
|
2. |
CHECK BRAKE PEDAL OR STOP LIGHT SWITCH ASSEMBLY INSTALLATION |
(a) Check the brake pedal height and stop light switch assembly installation.
Click here
OK:
The brake pedal height and stop light switch assembly installation are normal.
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY OUTPUT CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Brake pedal released |
Below 1.5 V |
| OK |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch 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 |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A178 ECM connector.
(e) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(f) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (for Sedan) |
B |
|
NG (for Hatchback) |
C |
| A |
|
| C |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SHIFT LOCK CONTROL UNIT ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A178 ECM connector.
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector (w/ Smart Entry and Start System).
(f) Disconnect the I141 shift lock control ECU (shift lock control unit assembly) connector (w/o Smart Entry and Start System).
(g) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(h) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (w/ Smart Entry and Start System) |
B |
|
NG (w/o Smart Entry and Start System) |
C |
| A |
|
| C |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A178 ECM connector.
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.
(f) Disconnect the O175 certification ECU (smart key ECU assembly) connector.
(g) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(h) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
8. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A178 ECM connector.
(e) Disconnect the O175 certification ECU (smart key ECU assembly) connector.
(f) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(g) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
CHECK BRAKE PEDAL OR STOP LIGHT SWITCH ASSEMBLY INSTALLATION |
(a) Check the brake pedal height and stop light switch assembly installation.
Click here
OK:
The brake pedal height and stop light switch assembly installation are normal.
| NG |
|
|
|
10. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY OUTPUT CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Brake pedal released |
Below 1.5 V |
| OK |
|
|
|
11. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch 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 |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
|
|
12. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A47 ECM connector. (for K120)
(e) Disconnect the A178 ECM connector. (for K121)
(f) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(g) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (for K120) |
B |
|
NG (for K121 (w/ Smart Entry and Start System)) |
C |
|
NG (for K121 (w/o Smart Entry and Start System)) |
D |
| A |
|
| C |
|
| D |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SHIFT LOCK CONTROL UNIT ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A47 ECM connector.
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.
(f) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(g) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
|
|
14. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - TCM) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A47 ECM connector.
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.
(f) Disconnect the C80 TCM connector.
(g) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(h) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
|
|
15. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A47 ECM connector.
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.
(f) Disconnect the C80 TCM connector.
(g) Disconnect the O175 certification ECU (smart key ECU assembly) connector.
(h) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(i) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
16. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A53 stop light switch assembly connector.
(d) Disconnect the A178 ECM connector.
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.
(f) Disconnect the O175 certification ECU (smart key ECU assembly) connector.
(g) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(h) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-3 (L) - Body ground |
Always |
Below 1.5 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|