RM38T0EC _57 Power Source / Network _104409 NETWORKING _0510092 LIN COMMUNICATION SYSTEM C

NETWORKING LIN COMMUNICATION SYSTEM B278C87 Power Source Control System Missing Message

DESCRIPTION

When an internal malfunction is detected in the certification ECU (smart key ECU assembly), this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B278C87	Power Source Control System Missing Message	An internal malfunction occurs in the certification ECU (smart key ECU assembly).	Certification ECU (smart key ECU assembly)

NOTICE:: ·

When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry & Start (CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

1.CLEAR DTC

Clear the DTCs.

Result:

Proceed to
NEXT

2.CHECK FOR DTC

Check for DTCs.

Result:

Result	Proceed to
B278C87 is output	A
B278C87 is not output	B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

USE SIMULATION METHOD TO CHECK