Toyota Corolla Cross: Power Source Control System Missing Message (B278C87)
Toyota Corolla Cross (2022-2025) Service Manual / Power Source & Network / Networking / Lin Communication System / Power Source Control System Missing Message (B278C87)
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) |
CAUTION / NOTICE / HINT
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 / Smart Key(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
Registration.
for HEV Model: Click here
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for Gasoline Model: Click here
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
|
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|
2. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes|
Result |
Proceed to |
|---|---|
|
B278C87 is output |
A |
|
B278C87 is not output |
B |
| A | .gif) |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| B | |
USE SIMULATION METHOD TO CHECK |
