DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U1117-87: Lost Communication with Accessory Gateway Missing Message [12/2021 - ]: Description

These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly) and ECM, main body ECU (multiplex network body ECU), No. 2 skid control ECU (brake actuator assembly), option connector (bus buffer ECU) or combination meter assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority	Note
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	CAN communication malfunction between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*)	ECM	Power Source Control	B	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U0129-87	Lost Communication with Brake System Control Module "A" Missing Message	CAN communication malfunction between certification ECU (smart key ECU assembly) and No. 2 skid control ECU (brake actuator assembly) (1-trip detection logic*)	No. 2 skid control ECU (brake actuator assembly)	Power Source Control	B	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U0140-87	Lost Communication with Body Control Module Missing Message	CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*)	Main body ECU (multiplex network body ECU)	Power Source Control	B	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U0155-87	Lost Communication with Instrument Panel Cluster (IPC) Control Module	CAN communication malfunction between certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*)	Combination meter assembly	Power Source Control	B	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.
U1117-87	Lost Communication with Accessory Gateway Missing Message	CAN communication malfunction between the certification ECU (smart key ECU assembly) and the option connector (bus buffer ECU) for approximately 10 seconds or more.	Option connector (bus buffer ECU)	Power Source Control	B	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait at least 10 seconds.

*: Only detected while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

DTC Code	Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
U0100-87	There is no effect on vehicle behavior.	If the following conditions are met, it can be determined that the malfunction is not in the direct line (NE) but in the CAN communication system. When the engine switch is pressed, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking. When the engine switch is pressed and held, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking. If the following conditions are met, it can be determined that there is a malfunction in both the CAN communication system and the direct line (NE). When the engine switch is pressed, the engine stops cranking after 6 seconds. When the engine switch is pressed and held, the engine remains cranking for up to 30 seconds.
U0129-87	Engine does not start.	-
U0140-87	Doors cannot be locked or unlocked. The warning (wireless buzzer) does not sound.	-
U0155-87	The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display.	-
U1117-87	The engine cannot be started using the wireless remote control function.	-

RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC No.	Data List and Active Test
U0100-87 U0129-87 U0140-87 U0155-87 U1117-87	-