DTC U3002-29: Invalid Data Received From Body Control Module (BCM) (Telematics Communication Unit): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC U3002:29 (TELEMATICS COMMUNICATION UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Invalid data received from body control module (BCM)
Detection condition	The telematics communication unit cannot receive the configuration data (VIN) from body control module (BCM) for a continuous 2 times.
Fail-safe	Inhibits the emergency call.
Possible cause	DTCs are stored in the body control module (BCM). Inappropriate telematics communication unit replacement procedure Body control module (BCM) configuration data write error Malfunction in CAN bus communication line Telematics communication unit malfunction Body control module (BCM) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable