DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message [10/2024 - ]: Description

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The ECM and skid control ECU (brake actuator assembly) transmit and receive date via CAN communication.

Detection overview

If a communication error occurs between the ECM and skid control ECU (brake actuator assembly), the ECM stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
U115C-87	Lost Communication with ECM/PCM "A" (ch5) Missing Message	Diagnostic condition: IG ON Abnormal condition: There is no communication between the ECM and skid control ECU (brake actuator assembly). Abnormal period: - Number of trips: 1 trip Detection method: Constant monitor Sensors/component parts used for detection: ECM	Wire harness or connector Skid control ECU (brake actuator assembly) ECM	Does not come on	Engine	B	SAE Code: U115C

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

Priority

Note

U115C-87

Lost Communication with ECM/PCM "A" (ch5) Missing Message

Diagnostic condition:

IG ON

Abnormal condition:

There is no communication between the ECM and skid control ECU (brake actuator assembly).

Abnormal period:

Number of trips:

1 trip

Detection method:

Constant monitor

Sensors/component parts used for detection:

Wire harness or connector
Skid control ECU (brake actuator assembly)
ECM

Does not come on

Engine

SAE Code: U115C