Toyota Tundra Service Manual > Meter / Gauge System: Lost Communication with Brake System Control Module (U0129)
DESCRIPTION The combination meter communicates with the skid control ECU via the CAN line. 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 contro ...
