DTC U0111-87: Lost Communication with Battery Energy Control Module "A" Missing Message [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

The ECM and battery energy control module send and receive signals via CAN communication.

If a communication error occurs between the ECM and battery ECU assembly, the ECM illuminates the MIL and stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
U0111-87	Lost Communication with Battery Energy Control Module "A" Missing Message	All of the following conditions are met for 50.6 seconds or more (1 trip detection logic): Ignition switch ON Auxiliary battery voltage is 9.5 V or higher No communication between ECM and battery ECU assembly	CAN communication system Battery ECU assembly ECM	Comes on	Engine	B	SAE Code: U0111