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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 72 (Electronically Controlled Brake System (HEV) - Diagnostic Codes (4 Of 6)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1349: Pressure Holding Solenoid Valve Learning Undone; DTC C134A: Pressure Holding Solenoid Valve Learning Malfunction [01/2019 - 09/2022] >> Procedure

DTC C1349: Pressure Holding Solenoid Valve Learning Undone; DTC C134A: Pressure Holding Solenoid Valve Learning Malfunction [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [01/2019 - 09/2022]

      Chassis > ABS/VSC/TRAC > Clear DTCs 

    2. Turn the power switch off.
    3. Turn the power switch on (IG).
    4. Check that DTCs other than C1345, C1349 and C1392 are not output.

      Refer to DTC CHECK / CLEAR [01/2019 - 09/2022]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      OK

      DTCs other than C1345, C1349 and C1392 are not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to  DIAGNOSTIC TROUBLE CODE CHART [01/2019 - 04/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 09/2022] 

    Result: 

    OK 

    See step  2

  2. PERFORM AIR BLEEDING 
    1. Perform the air bleeding procedure in Bleed Brake System.

      Refer to BLEEDING [01/2019 - 09/2022]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. PERFORM ABS HOLDING SOLENOID VALVE LEARNING 
    1. Turn the power switch off.
    2. Check and ensure the following conditions required for performing ABS holding solenoid valve learning and then perform ABS holding solenoid valve learning.

      Refer to INITIALIZATION [01/2019 - 09/2022]

      Chassis > ABS/VSC/TRAC > Utility 

      Tester Display
      ECB Utility
      1. The auxiliary battery voltage is 11 to 15.5 V when the power switch is on (READY).
      2. The brake actuator assembly is not hot.
      3. The hybrid control system is not malfunctioning.
      4. The shift state indicator shows that the shift lever is in P.
      5. The READY light in the combination meter assembly is illuminated.
      6. The brake pedal is not depressed.
      7. The parking brake is released.
      NOTE:

      Learning will be performed in the order of linear solenoid valve offset learning and then ABS holding solenoid valve learning.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. RECONFIRM DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [01/2019 - 09/2022]

      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 [01/2019 - 09/2022]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      DTCs C1349 and C134A are not output. A
      DTCs C1349 and/or C134A are output. B

    Result: 

    A 

    END 

    Result: 

    B 

    See step  5

  5. PERFORM ACTIVE TEST USING TECHSTREAM (ABS SOLENOID) 
    1. Select the Active Test on the Techstream.

      Refer to DATA LIST / ACTIVE TEST [01/2019 - 09/2022]

      Chassis > ABS/VSC/TRAC > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      ABS Solenoid (SRLH) Holding solenoid valve (RLH) Solenoid ON/OFF -
      ABS Solenoid (SRRH) Holding solenoid valve (RRH) Solenoid ON/OFF -
      ABS Solenoid (SFLH) Holding solenoid valve (FLH) Solenoid ON/OFF -
      ABS Solenoid (SFRH) Holding solenoid valve (FRH) Solenoid ON/OFF -

      Chassis > ABS/VSC/TRAC > Active Test 

      Tester Display
      ABS Solenoid (SRLH)

      Chassis > ABS/VSC/TRAC > Active Test 

      Tester Display
      ABS Solenoid (SRRH)

      Chassis > ABS/VSC/TRAC > Active Test 

      Tester Display
      ABS Solenoid (SFLH)

      Chassis > ABS/VSC/TRAC > Active Test 

      Tester Display
      ABS Solenoid (SFRH)
    2. Operate the SFRH (front right wheel holding solenoid valve), SFLH (front left wheel holding solenoid valve), SRRH (rear right wheel holding solenoid valve) and SRLH (rear left wheel holding solenoid valve) solenoids one by one. While operating each solenoid, depress the brake pedal, open the corresponding bleeder plug and check that brake fluid does not flow from the bleeder plug.

      OK

      Brake fluid does not flow from the corresponding bleeder plug when the brake pedal is depressed when operating each solenoid.

    3. While not operating the SFRH (front right wheel holding solenoid valve), SFLH (front left wheel holding solenoid valve), SRRH (rear right wheel holding solenoid valve) and SRLH (rear left wheel holding solenoid valve) solenoids, depress the brake pedal, open each bleeder plug and check that brake fluid flows from each bleeder plug.

      OK

      Brake fluid flows from each bleeder plug when not operating each solenoid and the brake pedal is depressed.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [01/2019 - 09/2022] 

    Result: 

    NG 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [01/2019 - 09/2022] 

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