DTC C124A-00: ECM Communication [11/2020 - ]: Procedure

1. Check that the proper EV control ECU is installed.

   OK

   Proper EV control ECU is installed.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE EV CONTROL ECU. 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 - ] 

Result: 

OK 

See step  2

1. Check that the proper No. 2 skid control ECU (brake actuator assembly) is installed.

   OK

   Proper No. 2 skid control ECU (brake actuator assembly) is installed.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE BRAKE ACTUATOR 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 - ] 

Result: 

OK 

See step  3

1. Clear system information.

   HINT: 

   Refer to UTILITY [11/2020 - ]

   Chassis > Brake/EPB > Utility 

   Tester Display
   Reset Memory

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Perform system information memorization.

   HINT: 

   Refer to UTILITY [11/2020 - ]

   Chassis > Brake/EPB > Utility 

   Tester Display
   Calibration

   HINT: 

   After performing "Reset Memory" using the GTS to clear the memorized value of the No. 2 skid control ECU (brake actuator assembly), DTC C124A-00 will be stored until system information memorization is performed.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

Pre-procedure1

• None

• Clear the DTCs.

  Chassis > Brake/EPB > Clear DTCs 

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off.

Result: 

NEXT 

See step  6

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/EPB > Trouble Codes 

  Result

  Result	Proceed to
  C124A-00 is not output	A
  C124A-00 is output	B

Post-procedure1

• None

Result: 

A 

END 

Result: 

B 

REPLACE BRAKE ACTUATOR 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 - ]