Toyota Yaris: 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 | mostbet az 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 / Entry & Start (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.
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| Result | Proceed to |
|---|---|
| DTC 278588 is output | A |
| DTC 278588 is not output | B |
| A |
 | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| B |
 | USE SIMULATION METHOD TO CHECK |
ID-BOX Missing Message (B278987)
DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more...
Other information:
Toyota Yaris XP210 (2020-2025) Owner's Manual: Warning Lights
These lights turn on or flash to notify the user of the system operation status or a system malfunction. Master Warning Light Brake System Warning Light ABS Warning Light Charging System Warning Light Engine Oil Warning Light Check Engine Light High Engine Coolant Temperature Warning Light Automatic Transaxle Warning Light Power Steering Malfunction Indicator Light Air Bag/Front Seat Belt Pretensioner System Warning Light LED Headlight Warning Light Low Fuel Warning Light Check Fuel Cap Warning Light Seat Belt Warning Light (Front seat) Door-Ajar Warning Light Low Washer Fluid Level Warning Light Tire Pressure Monitoring System Warning Light KEY Warning Light Low Speed Pre-Collision System Warning Light * 1: The light turns on when the ignition is switched on for an operation check, and turns off a few seconds later or when the engine is started...
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Components
COMPONENTS ILLUSTRATION *1 CLUTCH MASTER CYLINDER GASKET *2 CLUTCH MASTER CYLINDER ASSEMBLY *3 CLUTCH MASTER CYLINDER PUSH ROD CLEVIS WITH HOLE PIN *4 CLUTCH MASTER CYLINDER TO FLEXIBLE HOSE TUBE *5 NO. 1 CLUTCH RESERVOIR HOSE - - Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft...
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Fuel-Filler Lid and Cap
WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is removed too quickly.
