Toyota CH-R Service Manual: System Diagram

Toyota CH-R Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function) / System Diagram

SYSTEM DIAGRAM

Component

Outline

Engine switch

  • Transponder key amplifier
  • Turns on the power and starts the engine.
  • Contains a built-in transponder key amplifier to start the engine when the electrical key transmitter sub-assembly does not operate properly due to a depleted transmitter battery or wave interference.

Certification ECU (smart key ECU assembly)
  • Changes the power source mode by operating the ACC and IG relays.
  • Controls starting of the engine by operating the starter relay.
  • Performs key verification.
  • Controls each electrical key antenna (outside), electrical key antenna (indoor) and door lock/unlock sensor.
  • Outputs entry door lock/unlock commands.
  • Outputs steering lock ECU (steering lock actuator or upper bracket assembly) lock/unlock command signals.
  • Outputs immobiliser set/unset commands.
  • Forms the smart key system detection area.

ID code box (immobiliser code ECU)
  • Receives command signals from the certification ECU (smart key ECU assembly) and outputs immobiliser set and unset command signals to ECM.
  • Records codes for smart verification.

ECM

Outputs a signal indicating that the engine has started to the certification ECU (smart key ECU assembly) when starting the engine.

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

Combination meter assembly
  • Displays various warnings (messages on the multi-information display) according to the command signals from the certification ECU (smart key ECU assembly).
  • Outputs a vehicle speed signal to the ECUs.

IG, ACC relay

Turns on/off according to the certification ECU (smart key ECU assembly) and provides power to each system.

Stop light switch assembly

Detects when the brake pedal is depressed (switch is on) and outputs a signal to the certification ECU (smart key ECU assembly).
  • No. 1 indoor electrical key antenna assembly (front floor)
  • No. 3 indoor electrical key antenna assembly (inside luggage compartment)

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

Electrical key transmitter sub-assembly

Sends an ID code upon receiving a request signal.

Park/neutral position switch

Outputs the shift position to the certification ECU (smart key ECU assembly)

Shift lock control unit assembly

Outputs a shift lock control ECU signal to the certification ECU (smart key ECU assembly).

Electrical key and TPMS receiver assembly

Receives the smart key system code/wireless code sent from the electrical key transmitter subassembly and sends it to the certification ECU (smart key ECU assembly).
    Precaution
    PRECAUTION CAUTION REGARDING INTERFERENCE WITH ELECTRONIC DEVICES CAUTION: People with implantable cardiac pacemakers, cardiac resynchronization therapy-pacemakers or implantable cardio ...

    How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the smart key system (for Start Function). *: Use the Techstream. PROCEDURE 1. VEHIC ...

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