System Diagram

Fig 1: Power Steering System Diagram (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Power Steering System Diagram (2 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Transmitting ECU (transmitter)	Receiving ECU	Signals	Communication Method
HV Control ECU	Power Steering ECU	T/M variation information signal	CAN
HV Control ECU	Power Steering ECU	Engine speed signal	CAN
HV Control ECU	Power Steering ECU	Ambient temperature signal	CAN
HV Control ECU	Power Steering ECU	Intake air temperature signal	CAN
HV Control ECU	Power Steering ECU	Engine variation information signal	CAN
HV Control ECU	Power Steering ECU	Vehicle destination information signal	CAN
Skid Control ECU	Power Steering ECU	Output command value (to EPS) signal	CAN
Skid Control ECU	Power Steering ECU	Additional torque target signal	CAN
Skid Control ECU	Power Steering ECU	Vehicle speed (SP1) status signal	CAN
Skid Control ECU	Power Steering ECU	Target steering angle and additional torque valid signal	CAN
Skid Control ECU	Power Steering ECU	Vehicle speed (SP1) signal	CAN
Skid Control ECU	Power Steering ECU	Test mode signal	CAN
Skid Control ECU	Power Steering ECU	VSC controlling signal	CAN
Skid Control ECU	Power Steering ECU	ABS controlling signal	CAN
Steering Angle Sensor	Power Steering ECU	Data continuity (valid/invalid) signal	CAN
Steering Angle Sensor	Power Steering ECU	+B open circuit signal	CAN
Steering Angle Sensor	Power Steering ECU	Sensor malfunction signal	CAN
Steering Angle Sensor	Power Steering ECU	Steering angle signal	CAN
Steering Angle Sensor	Power Steering ECU	Zero point memory (in sensor) valid/invalid signal	CAN
Steering Angle Sensor	Power Steering ECU	Zero point (stored in steering angle sensor) signal	CAN
Main Body ECU (RH)	Power Steering ECU	Vehicle model signal	BEAN, CAN
Power Steering ECU	Skid Control ECU	EPS pinion angle invalid signal	CAN
Power Steering ECU	Skid Control ECU	EPS assisting current invalid signal	CAN
Power Steering ECU	Skid Control ECU	EPS torque sensor value invalid signal	CAN
Power Steering ECU	ECM	EPS idle up request signal	CAN
Power Steering ECU	Skid Control ECU	EPS torque sensor value signal	CAN
Power Steering ECU	Skid Control ECU	EPS pinion angle signal	CAN
Power Steering ECU	Skid Control ECU	EPS assisting current signal	CAN
Power Steering ECU	Combination Meter	EPS light ON request signal	BEAN, CAN
Power Steering ECU	Combination Meter	EPS diagnostic information signal	BEAN, CAN

HINT:

Transmitted when the vehicle detects different levels of friction between the tires and road surface due to road conditions.