DTC C0500-1F: Left Front Wheel Speed Sensor Circuit Intermittent; DTC C0506-1F: Right Front 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	Normal Condition	Diagnostic Note
   FR Wheel Speed	Front 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
   FL Wheel Speed	Front 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
   FR Speed Open	Front speed sensor RH 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".
   FL Speed Open	Front 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 speed sensor installation.

   Refer to INSTALLATION [08/2015 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Normal
   *b	Abnormal
   *c	Clearance

   OK

   There is no clearance between the sensor and the front steering knuckle.

   The installation bolt is tightened properly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

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

Result: 

OK 

See step  3

1. Remove the front speed sensor.

   Refer to REMOVAL [08/2015 - ]

2. Check the front speed sensor.

   OK

   The front 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 front 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 component with the front speed sensor rotor.

   Refer to REMOVAL [08/2015 - ]

2. Check the front skid control rotor.

   OK

   The front skid control 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 front skid control rotor, this DTC may be stored.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT SPEED SENSOR AND FRONT AXLE W/ABS ROTOR BEARING ASSEMBLY 

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

for front axle w/ABS rotor bearing assembly: Refer to REMOVAL [08/2015 - ]

Result: 

NG 

See step  5

1. Clean the front speed sensor rotor.
   NOTE:

   Do not use parts cleaner when cleaning the front 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
   FR Wheel Speed	Front 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
   FL Wheel Speed	Front 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
   FR Speed Open	Front speed sensor RH 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".
   FL Speed Open	Front 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 FRONT SPEED SENSOR AND FRONT AXLE W/ABS ROTOR BEARING ASSEMBLY 

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

for front axle w/ABS rotor bearing assembly: Refer to REMOVAL [08/2015 - ]

1. Clean the front speed sensor.
   NOTE:

   When cleaning the front 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	Measurement Item	Normal Condition	Diagnostic Note
   FR Wheel Speed	Front 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
   FL Wheel Speed	Front 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
   FR Speed Open	Front speed sensor RH 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".
   FL Speed Open	Front 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