Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: System Diagram

SYSTEM DIAGRAM

Sender	Receiver	Signal	Line
Steering Sensor	Parking Assist ECU	Data continuity flag Steering angle signal	CAN
Skid Control ECU	Parking Assist ECU	Wheel speed signal Vehicle speed signal	CAN
Main Body ECU (Multiplex Network Body ECU)	Parking Assist ECU	Courtesy light switch signal Outer mirror retract information Destination signal Steering wheel signal Vehicle information	CAN
ECM	Parking Assist ECU	Shift lever position signal Drivetrain information 2WD/AWD information HV flag	CAN
Clearance Warning ECU Assembly	Parking Assist ECU	Sonar information signal	CAN
Blind Spot Monitor Sensor RH	Parking Assist ECU Television Camera Assembly	RCTA information signal	CAN
Television Camera Assembly	Blind Spot Monitor Sensor RH	Camera detection buzzer request	CAN

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Hv Model): Short to GND in Immobiliser System Power Source Circuit (B278A)
DESCRIPTION When there is a short to GND in the power supply for the transponder key amplifier of the power switch, the certification ECU (smart key ECU assembly) stores this DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Note B278A Short to GND in Immobiliser System Power Source C ...

Toyota Avalon (XX50) 2019-2022 Owners Manual