The Toyota C-HR (Compact High-Rider) is a modern crossover that relies heavily on integrated electronics for engine management, safety, and infotainment. Below is a breakdown of the key electronic systems found in the vehicle. --- ### 1. Hybrid System Control (Hybrid Models) If the C-HR is a hybrid variant, the electronics are dominated by the **Toyota Hybrid System (THS II)**. | Component | Function | | :--- | :--- | | **Power Control Unit (PCU)** | Acts as the "brain," managing electricity flow between the battery and motor. | | **Inverter/Converter** | Converts DC from the battery to AC for the motors, and steps down voltage for 12V accessories. | | **Hybrid ECU** | Calculates the optimal balance between the gasoline engine and electric motor power. | ### 2. Toyota Safety Sense (TSS) The C-HR features a suite of active safety electronics designed to prevent collisions. * **Millimeter-Wave Radar:** Located behind the front emblem, it detects the distance and speed of vehicles ahead. * **Monocular Camera:** Mounted on the upper windshield, it identifies lane markings, pedestrians, and road signs. * **Pre-Collision System (PCS):** Uses the radar/camera data to trigger automatic emergency braking. * **Blind Spot Monitor (BSM):** Radar sensors in the rear bumper corners that detect vehicles in adjacent lanes. ### 3. Infotainment & Connectivity The cabin electronics center around the **Multimedia Head Unit**. * **DCM (Data Communication Module):** An onboard cellular transceiver that enables remote services, emergency calls (eCall), and GPS tracking. * **CAN-Bus Network:** A high-speed communication wiring system that allows the screen to display real-time vehicle data (like tire pressure or hybrid energy flow). * **Smart Key System:** Uses Low-Frequency (LF) antennas inside the cabin and Radio Frequency (RF) receivers to allow keyless entry and push-button start. ### 4. Chassis & Power Management | System | Electronic Role | | :--- | :--- | | **Electric Power Steering (EPS)** | Uses an electric motor on the steering column instead of hydraulic pumps to save fuel and allow Lane Trace Assist. | | **Electronic Parking Brake (EPB)** | Replaces the physical cable with high-torque electric actuators on the rear brake calipers. | | **ECM (Engine Control Module)** | Manages Electronic Fuel Injection (EFI) and the VVT-i (Variable Valve Timing) sensors. | --- ### Summary of Sensors The C-HR is equipped with dozens of sensors, including: 1. **Oxygen Sensors:** Monitor exhaust gases. 2. **Wheel Speed Sensors:** Essential for ABS and Traction Control. 3. **Knock Sensors:** Prevent engine damage by detecting improper combustion. 4. **Ultrasonic Sensors:** Integrated into bumpers for Parking Assist.