DESCRIPTION
This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more.
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) |
HINT:
The power management control ECU is built into the certification ECU (smart key ECU assembly).
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs.
Click here
Body Electrical > Smart Key > Clear DTCs
|
2. |
CHECK FOR DTC |
(a) Check for DTCs.
Click here
Body Electrical > Smart Key > Trouble CodesOK:
DTC B278C is not output.
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
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PRECAUTION
IGNITION SWITCH EXPRESSIONS
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of the vehicle. The expressions listed in the table below are used in this section.
Expression
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COMPONENTS
ILLUSTRATION
*A
for Driver Side
*B
for Front Passenger Side
*1
DOOR CONTROL SWITCH ASSEMBLY
*2
MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
*3
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