DTC C050C-1F: Left Rear Wheel Speed Sensor Circuit Intermittent [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.

READ VALUE USING GTS (RL WHEEL SPEED AND MOMENTARY INTERRUPTION)

While monitoring the values of the Data List, perform a road test and attempt to reproduce the problem symptoms based on the interview with the customer and the vehicle conditions stored as Freeze Frame Data when the DTC was stored.

Chassis > Brake/EPB > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0 mph)	When driving at constant speed: No large fluctuations
RL Speed Open	Rear speed sensor LH open detection	Normal / Under intermittent	Normal: Normal Under intermittent: Momentary interruption	-

Chassis > Brake/EPB > Data List

Tester Display
RL Wheel Speed
RL Speed Open

The values change in accordance with the operation of the vehicle and there is no intermittent operation.

NOTE:

Perform the above inspection before removing the sensor and connector.

Result

Proceed to
OK
NG

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

Result:

See step 2

CHECK REAR SPEED SENSOR LH INSTALLATION

Turn the ignition switch off.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Rear Speed Sensor LH
*a	Correct
*b	Incorrect
*c	8.5 N.m (87 kgf/cm, 75 in.lbf)
*d	No clearance

Check the rear speed sensor LH installation.

There is no clearance between the rear speed sensor LH and the rear axle carrier LH.

The installation bolt is tightened properly.

Torque

8.5 N.m (87 kgf/cm, 75 in.lbf)

Result

Proceed to
OK
NG

Result:

REINSTALL OR REPLACE REAR SPEED SENSOR LH. Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

Result:

See step 3

CHECK REAR SPEED SENSOR LH (CHECK FOR FOREIGN MATTER)

Remove the rear speed sensor LH, and confirm that there is no foreign matter, oil or grease on the rear speed sensor tip LH.

The rear speed sensor tip LH is free of oil and foreign matter.

HINT:

If foreign matter of 1mm x 1mm or more is adhered to the rear speed sensor LH, this DTC may be stored.

Result

Proceed to
OK
NG

Result:

See step 7

Result:

See step 4

CHECK REAR SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER)

Confirm that there is no foreign matter, oil or grease on the rear speed sensor rotor LH.

The rear speed sensor rotor LH is free of oil and foreign matter.

HINT:

If foreign matter of 1mm x 1mm or more is adhered to the rear speed sensor rotor LH, this DTC may be stored.
The rear speed sensor rotor LH is incorporated into the rear axle hub and bearing assembly LH.
If the rear speed sensor rotor LH needs to be replaced, replace it together with the rear axle hub and bearing assembly LH.

Result

Proceed to
OK
NG

Result:

REPLACE REAR SPEED SENSOR LH AND REAR SPEED SENSOR ROTOR LH

for Rear Speed Sensor LH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

for Rear Speed Sensor Rotor LH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

Result:

See step 5

CLEAN REAR SPEED SENSOR ROTOR LH

Clean the rear speed sensor rotor LH.

NOTE:

Do not use parts cleaner when cleaning the rear speed sensor rotor LH.

Result

Proceed to
NEXT

Result:

See step 6

READ VALUE USING GTS (RL WHEEL SPEED AND MOMENTARY INTERRUPTION)

Chassis > Brake/EPB > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0 mph)	When driving at constant speed: No large fluctuations
RL Speed Open	Rear speed sensor LH open detection	Normal / Under intermittent	Normal: Normal Under intermittent: Momentary interruption	-

Chassis > Brake/EPB > Data List

Tester Display
RL Wheel Speed
RL Speed Open

The values change in accordance with the operation of the vehicle and there is no intermittent operation.

NOTE:

Perform the above inspection before removing the sensor and connector.

HINT:

The rear speed sensor rotor LH is incorporated into the rear axle hub and bearing assembly LH.

If the rear speed sensor rotor LH needs to be replaced, replace it together with the rear axle hub and bearing assembly LH.

Result

Proceed to
OK
NG

Result:

END

Result:

REPLACE REAR SPEED SENSOR LH AND REAR SPEED SENSOR ROTOR LH

for Rear Speed Sensor LH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

for Rear Speed Sensor Rotor LH: Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]

CLEAN REAR SPEED SENSOR LH

Clean the rear speed sensor LH.

NOTE:

When cleaning the rear speed sensor LH, make sure to clean the installation hole before installation.

Result

Proceed to
NEXT

Result:

See step 8

READ VALUE USING GTS (RL WHEEL SPEED AND MOMENTARY INTERRUPTION)

Chassis > Brake/EPB > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0 mph)	When driving at constant speed: No large fluctuations
RL Speed Open	Rear speed sensor LH open detection	Normal / Under intermittent	Normal: Normal Under intermittent: Momentary interruption	-

Chassis > Brake/EPB > Data List

Tester Display
RL Wheel Speed
RL Speed Open

The values change in accordance with the operation of the vehicle and there is no intermittent operation.

NOTE:

Perform the above inspection before removing the sensor and connector.

Result

Proceed to
OK
NG

Result:

END

Result:

See step 4