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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (2 Of 5)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1247: Stroke Sensor; DTC C1392: Zero Point Calibration of Stroke Sensor undone [06/2018 - ] >> Procedure

DTC C1247: Stroke Sensor; DTC C1392: Zero Point Calibration of Stroke Sensor undone [06/2018 - ]: Procedure

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  1. CHECK BRAKE PEDAL 
    1. Check that the brake pedal and the brake pedal stroke sensor assembly are properly installed and that the pedal can be depressed normally.
    2. Check and adjust the brake pedal height.

      Refer to PROCEDURE - Step 1 [08/2021 - ] , or refer to ADJUSTMENT [08/2021 - ]

    3. Adjust the brake pedal stroke sensor assembly.

      Refer to PROCEDURE - Step 4

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. 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 C1247 is output. A
      DTC C1392 is output. B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  3

  3. CHECK FREEZE FRAME DATA 
    1. Check the INF code from the Freeze Frame Data stored when DTC (C1247) was stored.

      Refer to FREEZE FRAME DATA [06/2018 - ]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      INF code 211 is output. A
      INF code 212, 213, 214, 215, 216 or 217 is output. B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE PEDAL STROKE SENSOR ASSEMBLY) 
    1. Turn the power switch off.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
    4. Disconnect the A44 brake pedal stroke sensor assembly connector.
    5. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A45-13 (SKG1) - A44-5 (SKG) Always Below 1 Ω
      A45-13 (SKG1) or A44-5 (SKG) - Body ground Always 10 kΩ or higher
      A45-21 (VSK2) - A44-2 (VSK2) Always Below 1 Ω
      A45-21 (VSK2) or A44-2 (VSK2) - Body ground Always 10 kΩ or higher
      A45-25 (VSK1) - A44-4 (VCSK) Always Below 1 Ω
      A45-25 (VSK1) or A44-4 (VCSK) - Body ground Always 10 kΩ or higher
      A45-33 (SKG2) - A44-3 (SKG2) Always Below 1 Ω
      A45-33 (SKG2) or A44-3 (SKG2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT) 
    1. Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
      GTY820758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Brake Pedal Stroke Sensor Assembly)
    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
      A44-4 (VCSK) - A44-5 (SKG) Power switch on (IG) 4.84 to 5.16 V
      A44-2 (VSK2) - A44-3 (SKG2) Power switch on (IG) 4.84 to 5.16 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

  6. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE PEDAL STROKE SENSOR ASSEMBLY) 
    1. Turn the power switch off.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
    4. Disconnect the A44 brake pedal stroke sensor assembly connector.
    5. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A45-17 (SKS1) - A44-6 (SKS1) Always Below 1 Ω
      A45-17 (SKS1) or A44-6 (SKS1) - Body ground Always 10 kΩ or higher
      A45-19 (SKS2) - A44-1 (SKS2) Always Below 1 Ω
      A45-19 (SKS2) or A44-1 (SKS2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. PERFORM BRAKE PEDAL STROKE SENSOR ASSEMBLY ZERO POINT CALIBRATION 
    1. Perform brake pedal stroke sensor assembly zero point calibration.

      Refer to INITIALIZATION [06/2018 - ]

      NOTE:

      Make sure to perform linear solenoid valve offset learning, ABS holding solenoid valve learning, brake pedal stroke sensor assembly zero point calibration and system information memorization after performing "Reset Memory" as the data stored during linear solenoid valve offset learning, ABS holding solenoid valve learning, brake pedal stroke sensor assembly zero point calibration and system information memorization is cleared.

      Chassis > ABS/VSC/TRAC > Utility 

      Tester Display
      Reset Memory

      Chassis > ABS/VSC/TRAC > Utility 

      Tester Display
      ECB Utility

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. 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 (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 C1392 is output. A
      DTCs are not output. B
      DTCs other than C1392 are output. C

    Result: 

    B 

    END 

    Result: 

    C 

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2018 - 07/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2019 - 08/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - ] 

    Result: 

    A 

    See step  9

  9. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT) 
    1. Turn the power switch off.
      GTY820758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Brake Pedal Stroke Sensor Assembly)
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the A44 brake pedal stroke sensor assembly connector.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    5. Turn the power switch on (IG).
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A44-4 (VCSK) - A44-5 (SKG) Power switch on (IG) 4.84 to 5.16 V
      A44-2 (VSK2) - A44-3 (SKG2) Power switch on (IG) 4.84 to 5.16 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

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