DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message [08/2023 - ]: Description

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The ECM and MG ECU send and receive signals via CAN communication.

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
U1154-87	Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message	All of the following conditions are met for 5 seconds or more (1 trip detection logic): Auxiliary battery voltage is 10 V or higher No communication between ECM and MG ECU	CAN communication system MG ECU ECM	Comes on	Engine	B	SAE Code: U1154 DTC for Mexico Models: Applies