Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZNEZ
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Start Function): SYSTEM DIAGRAM; 2017 - 2020 MY Sienna [08/2016 -        ]

SYSTEM DIAGRAM

Component

Outline

Engine switch
  • Turns on the power and starts the engine.
  • Contains an indicator to indicate when the engine can be started.
  • Contains a built-in transponder key amplifier to start the engine when the key does not operate properly due to a depleted battery or wave interference.

Certification ECU (smart key ECU assembly)
  • Performs key verification.
  • Controls the electrical key antenna (outside), electrical key antenna (indoor) and door lock/unlock sensor.
  • Receives the open signal from the back door opener switch and outputs a signal to the main body ECU via CAN communication.
  • Outputs smart entry door lock/unlock commands.
  • Outputs steering lock actuator assembly lock/unlock command signals.
  • Outputs immobiliser set/unset commands.
  • Controls the security indicator light and engine switch indicator.
  • Forms the smart entry detection area.

Power management control ECU
  • Changes the power source mode by operating the ACC and IG relays.
  • Controls starting by operating the starter relay.
  • Controls the engine switch indicator.

Wireless door lock buzzer
  • Sounds the answer back when smart entry or wireless control operations are performed.
  • Sounds the warnings for smart entry and wireless control.

ECM
  • Outputs a signal indicating that the engine has started to the power management control ECU when starting the engine.
  • Outputs a shift position signal to the main body ECU.

Steering lock actuator assembly (steering lock ECU)
  • Receives command signals from the certification ECU (smart key ECU assembly) and activates the steering lock actuator assembly.
  • Records codes for smart verification.

Combination meter
  • Operates various warnings (messages on the multi-information display, sounding of the buzzer in the combination meter, blinking or illumination of the master warning light) according to the command signals from the certification ECU (smart key ECU assembly).
  • Displays information when the smart access system with push-button start has a malfunction.
  • Outputs a vehicle speed signal to the main body ECU.

Security indicator light

Blinks when the engine immobiliser system is set (the engine cannot be started) according to certification ECU (smart key ECU assembly) control (immobiliser function).

IG, ACC relay

Turns on/off according to power management control ECU control and provides power to each system.

Stop light switch assembly

Detects that the brake pedal has been depressed (switch is on) and outputs a signal to the power management control ECU.

Turn signal flasher assembly

Blinks the hazard warning lights during answer back according to main body ECU control (answer back function).

Front door outside handle assembly LH/RH

Sends request signals from the door electrical oscillator via the built-in electrical key antenna and forms the vehicle exterior detection area. Door lock switch operation signals to the certification ECU (smart key ECU assembly) (entry lock function).

Uses the built-in touch sensor to detect the operation of the front door outside handle assembly and sends signals to the certification ECU (smart key ECU assembly) (entry unlock function).

Door electrical oscillator

Sends request signals from the certification ECU (smart key ECU assembly) to the electrical key antenna built into the front door outside handle assembly.

No. 1 indoor electrical key antenna assembly (front floor)

No. 2 indoor electrical key antenna assembly (rear floor)

Sends the request code from the certification ECU (smart key ECU assembly) and forms the vehicle interior detection area.

No. 3 indoor electrical key antenna assembly (inside luggage)

Sends the request code from the certification ECU (smart key ECU assembly) and forms the luggage compartment interior detection area.

Electrical key antenna (outside luggage)

Sends the request code from the certification ECU (smart key ECU assembly) and forms the luggage compartment exterior detection area.

Back door electrical key switch

Sends switch operation signals to the certification ECU (smart key ECU assembly).

Door control receiver

Receives the smart access system with push-button start code/ wireless code sent from the key and sends it to the certification ECU (smart key ECU assembly).

Electrical key

Sends the ID code upon receiving a request signal.