If the vehicle information stored by the skid control ECU (brake actuator assembly) does not match that sent from the ECM or a new skid control ECU (brake actuator assembly) is installed and the vehicle information has not been stored, this DTC is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C124A00 | Non-learning of the Braking System information | Engine, drive source and destination information sent from the ECM does not match the information of the skid control ECU or there is no information in memory. | ·
ECM ·
Skid control ECU (brake actuator assembly) |
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
Check that the proper ECM is installed.
Proper ECM is installed.
Check if the ECM was replaced before the DTC was stored.
ECM was not replaced.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (A proper ECM is not installed and/or the ECM was replaced.) | B |
A
B
Check that a proper skid control ECU (brake actuator assembly) is installed.
Proper skid control ECU (brake actuator assembly) is installed.
Check if the skid control ECU (brake actuator assembly) had been replaced before the DTC was stored.
Skid control ECU (brake actuator assembly) had not been replaced.
| 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 |
A
B
C
Check that Store System Information (acceleration sensor zero point calibration and store system information memorization) has been performed.
Store System Information has been performed.
After installing a new skid control ECU (brake actuator assembly), DTCs C051D54 and C124A00 will be stored until system variant learning (acceleration sensor zero point calibration and store system information memorization) is performed.
| Proceed to |
|---|
| OK |
| NG |
OK
NG