Toyota prius 3rd gen Millimeter Wave Radar Sensor Assembly 88210-47010

Toyota Prius 3 ^rd Generation (XW30)

Millimeter Wave Radar Sensor Assembly Wiring Guide: DIY Pinout Diagram

What is: A vehicle Millimeter Wave Radar Sensor Assembly is an advanced driver-assistance component that uses high-frequency radar waves (typically 76–77 GHz) to detect objects around the vehicle. It measures distance, speed, and relative position of nearby vehicles or obstacles, enabling features like adaptive cruise control, pre-collision braking, lane assistance, and traffic monitoring. Its precise sensing works in various weather and lighting conditions, enhancing overall driving safety and system reliability.

Millimeter Wave Radar Sensor Assembly(88210-47010)

Toyota Prius 3rd Gen millimeter wave radar sensor assembly (88210-47010).

Millimeter wave radar module for Toyota Prius 3rd generation safety systems.

Toyota Prius PCS radar sensor assembly front view.

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1. Introduction

      The  Toyota Prius 3rd Generation Millimeter Wave Radar Sensor Assembly (88210-47010) is a key component of the vehicle’s advanced safety systems, particularly the Pre-Collision System (PCS) and Dynamic Radar Cruise Control (DRCC). This high-precision unit operates at millimeter-wave frequencies to accurately detect vehicles, obstacles, and relative distance ahead of the Prius. Designed for consistent performance in rain, fog, and low-light conditions, it helps the hybrid maintain safe following distances and supports automatic braking when potential collisions are detected. With its compact construction, reliable signal processing, and integration with the vehicle’s ECU, this radar sensor plays a vital role in enhancing driver confidence and overall road safety.

Related parts and Accessories

• Pre-Collision System (PCS) ECU:-Processes radar data to identify collision risks and commands brake assist or automatic braking.
• Dynamic Radar Cruise Control (DRCC) ECU:-
Uses radar information to maintain a safe distance from the preceding vehicle, adjusting throttle and braking.
• Skid Control ECU (ABS/VSC/TRAC ECU):-Cooperates with PCS to apply appropriate wheel braking during emergency interventions.
• Brake Actuator Assembly:- Executes braking commands sent by the PCS during pre-collision or distance control operations.
• Forward Recognition Camera (if equipped) :-Works alongside the radar to improve detection accuracy of vehicles, pedestrians, and lanes.
• Vehicle Speed Sensors :- Provide real-time speed data to support accurate radar-based calculations.
• Steering Angle Sensor:- Helps determine vehicle direction, improving target tracking and collision prediction.
• CAN Communication Network:- Allows radar sensor data to be shared across ECUs for coordinated safety functions.

2. Millimeter Wave Radar Sensor Assembly Wiring Diagram & Pinout

A. Connector Location

• Millimeter Wave Radar Sensor Assembly Position: located behind the front emblem on the vehicle’s front bumper, mounted to a bracket that positions it centrally for accurate forward detection.


• Connector Type:
  • A2 (5 pin) Black housing

B. Wiring Table

Millimeter Wave Radar Sensor Assembly (A2)

A2 TERMINALS OF Millimeter Wave Radar Sensor Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
A2-1	_	_	_
A2-2	SGND	(W-B) White/Black	➔ AL4 8 ➳ 4A 54 ⇔ 4A 42 ➔ L93 10 ⬌ L93 3 ▼ L1 (Ground Point)
A2-3	CA1N	(P) Pink	➔ AL4 9 ➳ L102 12 ⬌ L102 14 ➔ L60 18 (CA1N) [Driving Support ECU Assembly]
A2-4	CA1P	(LG) Light Green	➔ AL4 15 ➳ L102 1 ⬌ L102 3 ➔ L60 40 (CA1P) [Driving Support ECU Assembly]
A2-5	IGB	(R) Red	➔ AL4 17 ➳ 4A 60 ⇔ 4A 24 ➔ 3B 88 ⇔ 3B 76 ➔ 2B 16 ➤ 10A Blade Fuse (IG) [ ECU–IG NO.2 ]

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