RM35X0E _57 Power Source / Network _078518 NETWORKING _0388279 LIN COMMUNICATION SYSTEM C

NETWORKING  LIN COMMUNICATION SYSTEM  B278C  Lost Communication with Power Source Control  


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
B278C Lost Communication with Power Source Control An internal malfunction occurs in the certification ECU (smart key ECU assembly). Certification ECU (smart key ECU assembly)

CAUTION / NOTICE / HINT

NOTICE:
·

When using the GTS with the ignition switch off to troubleshoot:

Connect the GTS to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

·

Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for start function).



PROCEDURE

1.CLEAR DTC
a.

Clear the DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Clear DTCs
50002 125

Result:
Proceed to
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC
a.

Check for DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Trouble Codes
50001 125
OK:

DTC B278C is not output.



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)