DTC C124A-00: ECM Communication [10/2018 - 07/2022]: Procedure

1. Check that the proper ECM is installed.

   OK

   Proper ECM is installed.

2. Check if the ECM was replaced before the DTC was stored.

   OK

   ECM was not replaced.

   Result

   Result	Proceed to
   OK	A
   NG (A proper ECM is not installed and/or the ECM was replaced.)	B

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

A 

See step  2

1. Check that a proper skid control ECU (brake actuator assembly) is installed.

   OK

   Proper skid control ECU (brake actuator assembly) is installed.

2. Check if the skid control ECU (brake actuator assembly) had been replaced before the DTC was stored.

   OK

   Skid control ECU (brake actuator assembly) had not been replaced.

   Result

   Result	Proceed to
   OK	A
   NG (The skid control ECU (brake actuator assembly) had been replaced.)	B
   NG (A proper skid control ECU (brake actuator assembly) is not installed.)	C

Result: 

A 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

C 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

B 

See step  3

1. Check that Store System Information (acceleration sensor zero point calibration and store system information memorization) has been performed.

   OK

   Store System Information has been performed.

   HINT: 

   After installing a new skid control ECU (brake actuator assembly), DTCs C051D-54 and C124A-00 will be stored until system variant learning (acceleration sensor zero point calibration and store system information memorization) is performed.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

NG 

PERFORM ACCELERATION SENSOR ZERO POINT CALIBRATION AND STORE SYSTEM INFORMATION MEMORIZATION. Refer to  UTILITY [10/2018 - 07/2022]