Monitor Description

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The ECM and swing grille actuator assembly (active grille air shutter ECU) send and receive signals via CAN communication.

If a communication error occurs between the ECM and swing grille actuator assembly, the ECM stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
U0284-87	Lost Communication with Active Grille Air Shutter Module "A" Missing Message	All of the following conditions are met for 10.6 seconds or more (1 trip detection logic): Ignition switch ON Auxiliary battery voltage is 10 V or higher No communication between ECM and swing grille actuator assembly	CAN communication system Swing grille actuator assembly ECM	Comes on	DTC stored	SAE Code: U0284