DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [10/2022 - 11/2023]: Description

WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

The ECM receives signals sent from the skid control ECU (brake actuator assembly) via the CAN communication system. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding ECU or sensor.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
U0129-87	Lost Communication with Brake System Control Module Missing Message	No communication between the ECM and skid control ECU (brake actuator assembly) for 2.2 seconds or more (1-trip detection logic)	CAN communication system Brake actuator assembly (Skid control ECU) ECM	w/o Stop and Start System: Comes on w/ Stop and Start System: Does not come on	DTC stored	SAE Code: U0129