DTC C050C-12: Left Rear Wheel Speed Sensor Circuit Short to Battery [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)
- Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK
The connector is securely connected.
- Disconnect the f5 rear speed sensor LH connector.
- Check both the connector case and the terminals for deformation and corrosion.
OK
No deformation or corrosion.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition f5-1 (LA+) - f5-2 (LA-) Ignition switch ON 11 to 14 V Result
Proceed to OK NG
Result:
OK
REPLACE REAR SPEED SENSOR LH. Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]
Result:
NG
See step 2
- Make sure that there is no looseness at the locking part and the connecting part of the connectors.
- CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)
- Turn the ignition switch off.
*a Front view of wire harness connector
(to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly)) - Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK
The connector is securely connected.
- Disconnect the fG3 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
- Check both the connector case and the terminals for deformation and corrosion.
OK
No deformation or corrosion.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition fG3-4 (RL+) - fG3-3 (RL-) Ignition switch ON 11 to 14 V Result
Proceed to OK NG
Result:
OK
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY
Result:
NG
See step 3
- Turn the ignition switch off.
- CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)
- Turn the ignition switch off.
*a Front view of wire harness connector
(to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly)) - Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK
The connector is securely connected.
- Disconnect the A38 No. 2 skid control ECU (brake actuator assembly) connector.
- Check both the connector case and the terminals for deformation and corrosion.
OK
No deformation or corrosion.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition fG3-3 (RL-) - Body ground Always Below 1.5 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- Turn the ignition switch off.
- CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition fG3-4 (RL+) or A38-5 (RL+) - fG3-3 (RL-) or A38-4 (RL-) Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Measure the resistance according to the value(s) in the table below.