DTC U0129 Lost Communication with Brake System Control Module: Description

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

The combination meter communicates with the skid control ECU via the CAN line.

DTC U0129 LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE DETECTION CONDITION REFERENCE

DTC Code	DTC Detection Condition	Trouble Area
U0129	When either of following conditions is detected: 15 seconds have elapsed since engine started and IG voltage 10.5 V or more No communication with skid control ECU continues for 3 seconds or more (No communication with ECM or skid control ECU continues for 60 seconds or more)	CAN communication system