If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
Whenever ECU is replaced, ensure that the CAN bus lines are normal.
DTC SET CONDITIONS
This DTC is set when the brake fluid is not filled in the hydraulic unit.
PROBABLE CAUSES
Different hydraulic unit (For delivery to factory)