DTC C050C-1F: Left Rear Wheel Speed Sensor Circuit Intermittent [10/2022 - ]: Procedure

1. Check the vehicle specification.

   Result

   Result	Proceed to
   for 2WD	A
   for AWD	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. 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 skid control 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

   OK

   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 need to be replaced, replace the rear axle hub and bearing assembly LH.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

NG 

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

1. 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 skid control 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

   OK

   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 need to be replaced, replace the rear axle hub and bearing assembly LH.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

NG 

See step  4

Pre-procedure1

• Turn the ignition switch off.

• Check the rear skid control sensor LH installation.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Correct
  *b	Incorrect

  OK

  There is no clearance between the rear skid control sensor LH and the rear axle hub and bearing assembly LH.

  The installation bolt is tightened properly.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REINSTALL OR REPLACE REAR SKID CONTROL SENSOR LH 

Result: 

OK 

See step  5

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

   OK

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

   HINT: 

   If foreign matter of 1 mm (0.03937 in.) x 1 mm (0.03937 in.) or more is adhered to the rear skid control sensor LH, this DTC may be stored.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  9

Result: 

OK 

See step  6

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

   OK

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

   HINT: 

   • If foreign matter of 1 mm (0.03937 in.) x 1 mm (0.03937 in.) 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: 

OK 

REPLACE REAR SKID CONTROL SENSOR LH AND REAR SPEED SENSOR ROTOR LH 

for Rear Skid Control Sensor LH: Refer to REMOVAL [10/2022 - ]

for Rear Speed Sensor Rotor LH: Refer to REMOVAL [10/2022 - 08/2023] , or refer to REMOVAL [08/2023 - ]

Result: 

NG 

See step  7

1. 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: 

NEXT 

See step  8

1. 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

   OK

   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: 

OK 

END 

Result: 

NG 

REPLACE REAR SKID CONTROL SENSOR LH AND REAR SPEED SENSOR ROTOR LH 

for Rear Skid Control Sensor LH: Refer to REMOVAL [10/2022 - ]

for Rear Speed Sensor Rotor LH: Refer to REMOVAL [10/2022 - 08/2023] , or refer to REMOVAL [08/2023 - ]

1. Clean the rear skid control sensor LH.
   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  10

1. 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

   OK

   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: 

OK 

END 

Result: 

NG 

See step  6