Toyota prius 3rd gen Yaw Rate Sensor Assembly (L12)

Toyota Prius 3 ^rd Generation (XW30)

Yaw Rate Sensor Assembly Wiring Guide: DIY Pinout Diagram

What is: A vehicle Yaw Rate Sensor Assembly measures how quickly a vehicle rotates around its vertical axis, helping the car understand if it is turning, skidding, or losing stability. This sensor sends real-time data to systems like VSC, ESC, and ABS, allowing them to apply corrective braking or engine control. Its main purpose is to maintain stability, improve traction, and enhance overall safety during cornering or sudden maneuvers.

Yaw Rate Sensor Assembly (89183-48030)

Close-up of Prius 3rd gen Yaw Rate Sensor electrical connector

Toyota 89183-48030 sensor label and part number display

Toyota Prius 3rd gen Yaw Rate Sensor Assembly 89183-48030 – top view

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1. Introduction

      The  Toyota Prius 3rd Generation Yaw Rate Sensor Assembly (89183-48030) is a key component in the vehicle’s stability and safety system. It measures the Prius’s rotational movement around its vertical axis, allowing the car to detect understeer, oversteer, or loss of traction. Working closely with the Vehicle Stability Control (VSC), Traction Control, and ABS systems, it helps maintain smooth handling and safe cornering. This sensor ensures accurate feedback during sudden maneuvers, slippery-road driving, or emergency braking. Its precise data enables the ECU to apply corrective actions, improving driving stability, passenger safety, and overall vehicle control in real-time.

Related parts and Accessories

• Vehicle Stability Control (VSC) ECU :- Receives yaw rate data and applies corrective braking or engine control.
• ABS (Anti-lock Brake System) ECU / Actuator:-Works with yaw data to prevent wheel lock and maintain stability.
• Traction Control (TRAC) System:-Uses yaw and wheel-speed information to reduce wheel slip.
• Steering Angle Sensor :-Measures steering wheel position to compare intended vs actual direction.
• G-Sensor / Acceleration Sensor:-Often housed with the yaw sensor; detects lateral and longitudinal forces.
• Wheel Speed Sensors:- Help the ECU understand individual wheel rotation and detect skidding.
• Brake Actuator Assembly:- Applies hydraulic or electronic braking corrections during stability events.
• ECM / Hybrid Control ECU:- Coordinates engine and hybrid motor response based on stability inputs.
• Skid Control ECU:- The main processing unit integrating yaw rate, steering angle, and wheel-speed data.

2. Yaw Rate Sensor Assembly Wiring Diagram & Pinout

A. Connector Location

• Yaw Rate Sensor Assembly Position: The yaw rate sensor is located under the center console, on the floor panel between the front seats, hidden beneath the interior floor covers.
• Connector Type:
  • L12 (6 pin) Black housing

B. Wiring Table

Yaw Rate Sensor Assembly (L12)

L12 TERMINALS OF Toyota prius 3rd gen Yaw Rate Sensor Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
L12-1	GND	(W-B) White/Black	➔ 3A 22 ⇔ 3A 67 ➔ L93 5 ⬌ L93 3 ➔ ▼ L1 (Ground Point)
L12-2	CANL	(L) Blue	➔ L94 19
L12-3	CANH	(Y) Yellow	➔ L94 8
L12-4	IG	(B) Black	➔ 3A 17 ⇔ 3B 76 ➔ 2B 16 ➤ (IG) 10A Blade Fuse [ECU–IG NO. 2]
L12-5	_	_	_
L12-6	_	_	_

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