B278C

NETWORKING: LIN COMMUNICATION SYSTEM: B278C: Lost Communication with Power Source Control
B278C - Lost Communication with Power Source Control

DESCRIPTION





HINT
The power management control ECU is built into the certification ECU (smart key ECU assembly).

INSPECTION PROCEDURE

NOTICE:
* When using the Techstream to troubleshoot with the ignition switch off:
Connect the Techstream to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.
* If the certification ECU (smart key ECU assembly) is replaced, register the keys Engine Immobilizer System (w/ Smart Key System).

PROCEDURE

1. CLEAR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

2. CHECK FOR DTC

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B278C is not output.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting