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Home >> Lexus >> 2021 >> ES 300h Luxury >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (4 Of 5) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1413: Front Speed Sensor RH Circuit Output; DTC C1414: Front Speed Sensor LH Circuit Output [06/2018 - 08/2021] >> Procedure

DTC C1413: Front Speed Sensor RH Circuit Output; DTC C1414: Front Speed Sensor LH Circuit Output [06/2018 - 08/2021]: Procedure

  1. CHECK DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Clear DTCs 

    2. Turn the power switch off.
    3. Turn the power switch on (IG).
    4. Check if the same DTC is output.

      Refer to DTC CHECK / CLEAR [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      DTC C1413 is output. A
      DTC C1414 is output. B

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION) 
    1. Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC.

      Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Speed Sensor Voltage Open Front speed sensor RH voltage open detection Error or Normal Error: Momentary interruption
      Normal: Normal      		 -

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display
      FR Speed Sensor Voltage Open
    2. Check for any momentary interruptions in the wire harness and connectors.

      OK

      There are no momentary interruptions.

      NOTE:

      Perform the above inspection before removing the sensor and connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  3

  3. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR RH) 
    1. Select the Data List on the Techstream.

      Refer to DATA LIST / ACTIVE TEST [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Wheel Speed Front speed sensor RH Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display
      FR Wheel Speed
    2. Check the front speed sensor RH output value.

      OK

      The output value changes in accordance with the vehicle speed.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. RECONFIRM DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Clear DTCs 

    2. Turn the power switch off.
    3. Turn the power switch on (READY).
    4. Perform a road test.
    5. Check if the same DTC is output.

      Refer to DTC CHECK / CLEAR [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      DTC C1413 is not output. A
      DTC C1413 is output. B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    B 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

  5. CHECK FRONT SPEED SENSOR RH INSTALLATION 
    1. Turn the power switch off.
      GTY483599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Speed Sensor RH
      *a OK
      *b NG
      *c 8.5 N.m
      *d No Clearance
    2. Check the front speed sensor RH installation.

      OK

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

      The installation bolt is tightened properly.

      Torque 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REINSTALL OR REPLACE FRONT SPEED SENSOR RH. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK FRONT SPEED SENSOR RH AND FRONT SPEED SENSOR ROTOR RH (CHECK FOR FOREIGN MATTER) 
    1. Remove the front speed sensor RH and the component with the front speed sensor rotor RH.

      for Front Speed Sensor RH: Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - ]

      for Front Speed Sensor Rotor RH: Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 08/2021]

    2. Check the front speed sensor tip RH and front speed sensor rotor RH.

      OK

      The sensor tip and rotor are free of scratches, oil, and foreign matter.

      NOTE:
      • If there is oil or foreign matter on the front speed sensor RH, clean the front speed sensor RH and then check the front speed sensor rotor RH.
      • If the front speed sensor RH is damaged, replace the front speed sensor RH with a new one.
      • Check the front speed sensor RH signal after cleaning or replacement.

        Refer to TEST MODE PROCEDURE [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CLEAN OR REPLACE FRONT SPEED SENSOR RH AND FRONT SPEED SENSOR ROTOR RH 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - FRONT SPEED SENSOR RH) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    2. Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
    3. Disconnect the A46 front speed sensor RH connector.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A45-3 (FR+) - A46-1 (FR+) Always Below 1 Ω
      A45-3 (FR+) or A46-1 (FR+) - Body ground Always 10 kΩ or higher
      A45-4 (FR-) - A46-2 (FR-) Always Below 1 Ω
      A45-4 (FR-) or A46-2 (FR-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT) 
    1. Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
      GTY781440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Front Speed Sensor RH)
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A46-1 (FR+) - Body ground Power switch on (IG) 8 to 14 V
      NOTE:

      Check the front speed sensor RH signal after replacement.

      Refer to TEST MODE PROCEDURE [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SPEED SENSOR RH. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

    Result: 

    NG 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

  9. READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION) 
    1. Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC.

      Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Error or Normal Error: Momentary interruption
      Normal: Normal      		 -

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display
      FL Speed Sensor Voltage Open
    2. Check for any momentary interruptions in the wire harness and connectors.

      OK

      There are no momentary interruptions.

      NOTE:

      Perform the above inspection before removing the sensor and connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  10

  10. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR LH) 
    1. Select the Data List on the Techstream.

      Refer to DATA LIST / ACTIVE TEST [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FL Wheel Speed Front speed sensor LH Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations

      Chassis > ABS/VSC/TRAC > Data List 

      Tester Display
      FL Wheel Speed
    2. Check the front speed sensor LH output value.

      OK

      The output value changes in accordance with the vehicle speed.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  11

  11. RECONFIRM DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Clear DTCs 

    2. Turn the power switch off.
    3. Turn the power switch on (READY).
    4. Perform a road test.
    5. Check if the same DTC is output.

      Refer to DTC CHECK / CLEAR [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      DTC C1414 is not output. A
      DTC C1414 is output. B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    B 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

  12. CHECK FRONT SPEED SENSOR LH INSTALLATION 
    1. Turn the power switch off.
      GTY483599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front Speed Sensor LH
      *a OK
      *b NG
      *c 8.5 N.m
      *d No Clearance
    2. Check the front speed sensor LH installation.

      OK

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

      The installation bolt is tightened properly.

      Torque 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REINSTALL OR REPLACE FRONT SPEED SENSOR LH. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

    Result: 

    OK 

    See step  13

  13. CHECK FRONT SPEED SENSOR LH AND FRONT SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER) 
    1. Remove the front speed sensor LH and the component with the front speed sensor rotor LH.

      for Front Speed Sensor LH: Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - ]

      for Front Speed Sensor Rotor LH: Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 08/2021]

    2. Check the front speed sensor tip LH and front speed sensor rotor LH.

      OK

      The sensor tip and rotor are free of scratches, oil, and foreign matter.

      NOTE:
      • If there is oil or foreign matter on the front speed sensor LH, clean the front speed sensor LH and then check the front speed sensor rotor LH.
      • If the front speed sensor LH is damaged, replace the front speed sensor LH with a new one.
      • Check the front speed sensor LH signal after cleaning or replacement.

        Refer to TEST MODE PROCEDURE [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CLEAN OR REPLACE FRONT SPEED SENSOR LH AND FRONT SPEED SENSOR ROTOR LH 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - FRONT SPEED SENSOR LH) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    2. Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
    3. Disconnect the A48 front speed sensor LH connector.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A45-31 (FL+) - A48-1 (FL+) Always Below 1 Ω
      A45-31 (FL+) or A48-1 (FL+) - Body ground Always 10 kΩ or higher
      A45-32 (FL-) - A48-2 (FL-) Always Below 1 Ω
      A45-32 (FL-) or A48-2 (FL-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  15

  15. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT) 
    1. Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
      GTY781441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Front Speed Sensor LH)
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A48-1 (FL+) - Body ground Power switch on (IG) 8 to 14 V
      NOTE:

      Check the front speed sensor LH signal after replacement.

      Refer to TEST MODE PROCEDURE [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT SPEED SENSOR LH. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

    Result: 

    NG 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

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