DTC U0121-87: Communication Error With DSC HU/Control Module [Body Control Module (BCM) (Us)]: Outline

DTC U0121:87 - BODY CONTROL MODULE (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

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