| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000260RC |
| 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): C050012; Left Front Wheel Speed Sensor Circuit Short to Battery; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 - ] | ||
|
DTC |
C050012 |
Left Front Wheel Speed Sensor Circuit Short to Battery |
DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU (brake actuator assembly). These signals are used for brake control.
Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.
Each speed sensor detects that magnetic change and sends a pulse signal to the skid control ECU (brake actuator assembly).
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C050012 |
Left Front Wheel Speed Sensor Circuit Short to Battery |
The speed sensor short signal is ON continuously for 0.5 seconds or more. |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the A13 front speed sensor LH connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the ignition switch to ON.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A13-2 (FL+) - A13-1 (FL-) |
Ignition switch ON |
11 to 14 V |
| OK |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) |
|
(a) Turn the ignition switch off. |
|
(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 |
|---|---|---|
|
A13-1 (FL-) - Body ground |
Always |
Below 1.5 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR LH - BRAKE ACTUATOR ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A13-2 (FL+) or A140-22 (FL+) - A13-1 (FL-) or A140-21 (FL-) |
Always |
10 kΩ or higher |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
![2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (for Gasoline Model): REMOVAL](/t3Portal/stylegraphics/info.gif)
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|