System Diagram [08/2019 - 08/2021]

This is a detailed diagram related to the certification ECU (smart key ECU assembly).

Fig 1: Certification ECU (Smart Key ECU Assembly) Wiring Diagram (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Certification ECU (Smart Key ECU Assembly) Wiring Diagram (2 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

This is a detailed diagram related to the main body ECU (multiplex network body ECU).

Fig 3: Smart Key System Wiring Diagram (1 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Smart Key System Wiring Diagram (2 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Smart Key System Wiring Diagram (3 Of 4)

Fig 6: Smart Key SystemWiring Diagram (4 Of 4)

Component	Function
Front door outside handle assembly	Receives request signals from the certification ECU (smart key ECU assembly) via the built-in electrical key antenna (front door) and forms the vehicle exterior detection area. Uses the built-in touch sensor (lock sensor/unlock sensor) to detect the operation of the front door outside handle assembly and sends signals to the certification ECU (smart key ECU assembly).
No. 2 indoor electrical key antenna assembly (front floor) Indoor electrical key antenna (rear floor) No. 1 indoor electrical key antenna assembly (inside luggage)	Receives the request code from the certification ECU (smart key ECU assembly) and forms the vehicle interior detection area.
Electrical key antenna (outside luggage compartment)	Receives the request code from the certification ECU (smart key ECU assembly) and forms the luggage door exterior detection area.
Back door control switch	Sends switch operation signals to the multiplex network door ECU.
Door control and tire pressure monitoring system receiver assembly	Receives the smart key system code/wireless code sent from the electrical key transmitter sub-assembly and sends it to the certification ECU (smart key ECU assembly).
Wireless door lock buzzer	Sounds when warning functions operate in accordance with certification ECU (smart key ECU assembly) control.
Electrical key transmitter sub-assembly	Sends the ID code upon receiving a request signal.
Certification ECU (smart key ECU assembly)	Sends request codes to each electrical key antenna. Distinguishes and verifies the ID code from the electrical key transmitter sub-assembly and sends signals to each ECU in response to operated functions (controls entire system). Performs encryption code communication with the ID code box (immobilizer code ECU) when ignition operations are performed.