System Diagram

Fig 1: Engine Control System Diagram (1 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Engine Control System Diagram (2 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Engine Control System Diagram (3 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Engine Control System Diagram (4 Of 3)

COMMUNICATIONS

The ECM communicates with the following ECM and ECUs using the signals listed below. The following table explains receiving and sending signals by ECM or ECU.

COMMUNICATION SIGNAL

Transmit To	Receive From	Signal	Communication Line
HVECU	ECM	Inspection mode signal MIL illumination requirement Shift position information Ready state Starter ON	CAN
ECM	HV ECU	Ambient temperature Intake air temperature Radiator fan drive Engine warm-up requirement Engine rpm	CAN
ECM	Battery ECU	Engine rpm	CAN
ECM	Power Steering ECU	Inspection mode	CAN
ECM	Skid Control ECU	Inspection mode	CAN
ECM	Body ECU	Inspection mode Engine rpm	BEAN, CAN
Combination Meter ECU	ECM	Fuel level	BEAN, CAN
ECM	Combination Meter ECM	Engine coolant temperature Engine rpm Injection volume Inspection mode Engine oil pressure switch	BEAN, CAN
ECM	Air Conditioner Amplifier ECU	Engine coolant temperature Engine rpm Ambient temperature Coolant heat storage water valve close	BEAN, CAN
ECM	Certification ECU	Engine rpm	BEAN, CAN
ECM	EMV	Engine coolant temperature Inspection mode Engine oil pressure switch	ACV LAN, CAN