DTC C1345-51: Linear Solenoid Valve Offset Learning Not Programmed; DTC C1345-54: Linear Solenoid Valve Offset Learning Missing Calibration [11/2020 - ]: Procedure

1. Check that no DTCs other than those related to incomplete learning are output.

   Chassis > Brake Booster > Trouble Codes 

   Chassis > Brake/EPB > Trouble Codes 

   OK

   DTCs other than those related to incomplete learning are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

Result: 

OK 

See step  2

HINT: 

Refer to BLEEDING [11/2020 - ]

Result

Result: 

NEXT 

See step  3

1. Check and ensure the following conditions required for performing linear solenoid valve offset learning and then perform linear solenoid valve offset learning.

   HINT: 

   Refer to UTILITY [11/2020 - ]

   NOTE:

   If DTC C1345-54 is output, wait 3 minutes or more with the ignition switch turned off, then perform learning after turning the ignition switch to ON and clearing the DTCs.

   Chassis > Brake/EPB > Utility 

   Tester Display
   Calibration

   1. The auxiliary battery voltage is 11 to 15.5 V when the ignition switch is ON (READY).
   2. The brake booster with master cylinder assembly is not hot.
   3. The hybrid control system is not malfunctioning.
   4. The shift state indicator shows that park (P) is selected.
   5. The READY light in the combination meter assembly is illuminated.
   6. The brake pedal is not depressed.
   7. The parking brake is released.
   8. DTC C1451-51 is not output. (If it is output, bleed the air from the high-pressure tube.)

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

Pre-procedure1

• None

• Clear the DTCs.

  Chassis > Brake Booster > Clear DTCs 

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off.

Result: 

NEXT 

See step  5

Pre-procedure1

• Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

• Check if the same DTC is output.

  Chassis > Brake Booster > Trouble Codes 

  Result

  Result	Proceed to
  C1345-51 and C1345-54 are not output	A
  C1345-51 or C1345-54 is output	B

Post-procedure1

• None

Result: 

A 

END 

Result: 

B 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023]  , or refer to  REMOVAL [12/2023 - ]