DTC U2121-00: Communication Error With Vehicle Control Module (VCM) [Electronically Controlled Brake Unit]: Outline

DTC U2121:00 (ELECTRONICALLY CONTROLLED BRAKE UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Communication error with vehicle control module (VCM)
Detection condition	The electronically controlled brake unit cannot receive CAN signal from the vehicle control module (VCM).
Fail-safe	Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT] .)
Possible cause	Malfunction in CAN communication line between vehicle control module (VCM) and electronically controlled brake unit
System wiring diagram	Not applicable
Connector diagram	Not applicable