System Diagram

Without Smart Key System:

Fig 1: SFI System Diagram - Without Smart Key System (1 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig 2: SFI System Diagram - Without Smart Key System (2 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig 3: SFI System Diagram - Without Smart Key System (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
With Smart Key System:

Fig 4: SFI System Diagram - With Smart Key System (1 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig 5: SFI System Diagram - With Smart Key System (2 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig 6: SFI System Diagram - With Smart Key System (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
COMMUNICATION WITH OTHER COMPUTERS

Fig 7: Communication With Other Computers Flow Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

COMMUNICATIONS

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

ECM AND ECU SIGNALS DESCRIPTION CHART

Transmitter	Receiver	Signal	Communication Line
ECM	Front Controller	Radiator cooling fan control signal	CAN → BEAN
ECM	A/C ECU	A/C control signal (compressor control for turning off) A/C and engine co-operation control signal (compressor control for deceleration)	CAN → BEAN
A/C ECU	ECM	Idle up request signal	BEAN → CAN
Skid control ECU	ECM	Throttle closing request signal Ignition retard angle request signal Engine torque reduction request signal	CAN