DTC U2121-49: Communication Error With Vehicle Control Module (VCM) [Body Control Module (BCM)]: Outline

DTC U2121:49 (BODY CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Communication error with vehicle control module (VCM)
Detection condition	The body control module (BCM) cannot receive CAN signal from the vehicle control module (VCM).
Fail-safe	Not applicable
Possible cause	Malfunction in CAN communication line between vehicle control module (VCM) and body control module (BCM)
System wiring diagram	Not applicable