DTC C050C-1F: Left Rear Wheel Speed Sensor Circuit Intermittent; DTC C0512-1F: Right Rear Wheel Speed Sensor Circuit Intermittent [08/2019 - ]: Procedure

1. According to the display on the Techstream, display the Data List, perform a driving test based on the conditions when the problem occurred (determined from the freeze frame data or customer problem analysis results) and check the Data List when the vehicle is running and stopped.

   Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2019 - ]

   CHASSIS > BRAKE > DATA LIST
   
   

   Tester Display	Measurement Item	Range	Range	Range
   RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0.0 km/h (0.0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
   RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0.0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
   RR Speed Open	Rear speed sensor open RH detection	Under intermittent / Normal	Under intermittent: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Under intermittent" to "Normal".
   RL Speed Open	Rear speed sensor LH open detection	Under intermittent / Normal	Under intermittent: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Under intermittent" to "Normal".

   OK

   Output value does not change and no interruptions occur according to vehicle speed.

   HINT: 

   Perform the above inspection before removing the sensor and connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

Result: 

NG 

See step  2

1. Turn the ignition switch off.
2. Check the rear speed sensor installation.

   Refer to INSTALLATION [08/2015 - ]

   OK

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

   The installation bolt is tightened properly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Normal
   *b	Abnormal
   *c	Clearance

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSTALL REAR SPEED SENSOR CORRECTLY. Refer to  INSTALLATION [08/2015 - ] 

Result: 

OK 

See step  3

1. Remove the rear speed sensor.

   Refer to REMOVAL [08/2015 - ]

2. Check the rear speed sensor.

   OK

   The rear speed sensor tip 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, this DTC may be stored.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  7

Result: 

OK 

See step  4

1. Remove the rear axle hub and bearing assembly.

   Refer to REMOVAL [08/2015 - ]

2. Check the rear speed sensor rotor.

   OK

   The rear speed sensor rotor 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, this DTC may be stored.

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

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE REAR SPEED SENSOR AND REAR AXLE HUB AND BEARING ASSEMBLY 

for rear speed sensor: Refer to REMOVAL [08/2015 - ]

for rear axle hub and bearing assembly: Refer to REMOVAL [08/2015 - ]

Result: 

NG 

See step  5

1. Clean the rear speed sensor rotor.
   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. According to the display on the Techstream, display the Data List, perform a driving test based on the conditions when the problem occurred (determined from the freeze frame data or customer problem analysis results) and check the Data List when the vehicle is running and stopped.

   Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2019 - ]

   CHASSIS > BRAKE > DATA LIST
   
   

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0.0 km/h (0.0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
   RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0.0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
   RR Speed Open	Rear speed sensor open RH detection	Under intermittent / Normal	Under intermittent: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Under intermittent" to "Normal".
   RL Speed Open	Rear speed sensor LH open detection	Under intermittent / Normal	Under intermittent: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Under intermittent" to "Normal".

   OK

   Output value does not change and no interruptions occur according to vehicle speed.

   HINT: 

   Perform the above inspection before removing the sensor and connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE REAR SPEED SENSOR AND REAR AXLE HUB AND BEARING ASSEMBLY 

for rear speed sensor: Refer to REMOVAL [08/2015 - ]

for rear axle hub and bearing assembly: Refer to REMOVAL [08/2015 - ]

1. Clean the rear speed sensor.
   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. According to the display on the Techstream, display the Data List, perform a driving test based on the conditions when the problem occurred (determined from the freeze frame data or customer problem analysis results) and check the Data List when the vehicle is running and stopped.

   Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2019 - ]

   CHASSIS > BRAKE > DATA LIST
   
   

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0.0 km/h (0.0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
   RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0.0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
   RR Speed Open	Rear speed sensor open RH detection	Under intermittent / Normal	Under intermittent: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Under intermittent" to "Normal".
   RL Speed Open	Rear speed sensor LH open detection	Under intermittent / Normal	Under intermittent: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Under intermittent" to "Normal".

   OK

   Output value does not change and no interruptions occur according to vehicle speed.

   HINT: 

   Perform the above inspection before removing the sensor and connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  4