Toyota Yaris: Networking / Network Gateway Ecu

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)...

Components

COMPONENTS ILLUSTRATION *1 COWL SIDE TRIM BOARD RH *2 FRONT DOOR SCUFF PLATE RH *3 FRONT DOOR OPENING TRIM WEATHERSTRIP RH *4 GLOVE COMPARTMENT DOOR ASSEMBLY *5 LOWER NO...

Other information:

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: External BBC Circuit (P33B300)

DESCRIPTION When the engine is started (high electrical load) from engine stopped by the stop and start control, the external backup boost converter (eco run vehicle converter assembly) supplements auxiliary battery voltage in order to prevent the function from being disabled due to decrease in power source voltage supplied to the navigation system...

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. CHECK AUXILIARY BATTERY CONDITION NOTICE: If the auxiliary battery is weak or if the engine is difficult to start, recharge the auxiliary battery and perform inspections again before returning the vehicle to the customer...