| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000012SNO |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [03/2017 - ] |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: B278C; Lost Communication with Power Source Control; 2018 - 2024 MY Camry [03/2017 - ] | ||
|
DTC |
B278C |
Lost Communication with Power Source Control |
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:
-
Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
Click here
![2018 - 2019 MY Camry [03/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION](/t3Portal/stylegraphics/info.gif)
- When using the Techstream with the ignition switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
|
|
2. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
OK:
DTC B278C is not output.
| OK |
|
USE SIMULATION METHOD TO CHECK
|
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
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