| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028D6U |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - 08/2023] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C050C49; Left Rear Wheel Speed Sensor Internal Electronic Failure; 2023 MY Corolla Corolla Hatchback GR Corolla [11/2022 - 08/2023] | ||
|
DTC |
C050C49 |
Left Rear Wheel Speed Sensor Internal Electronic Failure |
DESCRIPTION
When the system is starting up and the skid control ECU (brake actuator assembly) detects a speed sensor circuit malfunction via the speed sensor circuit self-diagnosis function, this DTC is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C050C49 |
Left Rear Wheel Speed Sensor Internal Electronic Failure |
A circuit malfunction in the speed sensor is detected during the self test. |
|
WIRING DIAGRAM
Refer to DTC C050C12.
Click here
![2023 MY Corolla Corolla Hatchback GR Corolla [11/2022 - 08/2023]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C050C12; Left Rear Wheel Speed Sensor Circuit Short to Battery+](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (SENSOR 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 n2 rear speed sensor LH (rear axle hub and bearing assembly 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 |
|---|---|---|
|
n2-2 (RL+) - n2-1 (RL-) |
Ignition switch ON |
11 to 14 V |
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 n2 rear speed sensor LH (rear axle hub and bearing assembly LH) 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 |
|---|---|---|
|
n2-2 (RL+) - Body ground |
Ignition switch off |
Below 1.5 V |
| NG |
|
|
|
3. |
INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
(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 n2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
n2-1 (RL-) or nO2-2 (RL-) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
|
4. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(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 A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL-) or A51-23 (RL-) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH for Double Wishbone Type Suspension: Click here
for Torsion Beam Type Suspension: Click here
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 nO2 skid control sensor wire LH (No. 2 parking brake wire 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 |
|---|---|---|
|
nO2-1 (RL+) - Body ground |
Ignition switch off |
Below 1.5 V |
| OK |
|
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
|
6. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
|
(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 A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire 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 |
|---|---|---|
|
nO2-1 (RL+) - Body ground |
Always |
Below 1.5 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
CHECK HARNESS AND CONNECTOR (SENSOR 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 nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) 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 |
|---|---|---|
|
nO2-1 (RL+) - nO2-2 (RL-) |
Ignition switch ON |
11 to 14 V |
| OK |
|
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
|
8. |
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE 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 nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) 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 |
|---|---|---|
|
nO2-1 (RL+) - Body ground |
Ignition switch ON |
11 to 14 V |
| NG |
|
|
|
9. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
|
(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 A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire 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 |
|---|---|---|
|
nO2-2 (RL-) - Body ground |
Always |
Below 1.5 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(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 A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL-) - A51-23 (RL-) |
Always |
Below 1 Ω |
|
nO2-1 (RL+) or A51-39 (RL+) - nO2-2 (RL-) or A51-23 (RL-) |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
11. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(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 A51 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-1 (RL+) - A51-39 (RL+) |
Always |
Below 1 Ω |
|
nO2-1 (RL+) or A51-39 (RL+) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|