Toyota prius 3rd gen Brake Booster Pump Assembly (A17)(A18)

Toyota Prius 3 ^rd Generation (XW30)

Brake Booster Pump Assembly Wiring Guide: DIY Pinout Diagram

What is: A vehicle Brake Booster Pump Assembly is a critical component in modern braking systems that enhances braking efficiency. It uses vacuum or hydraulic pressure to amplify the force applied on the brake pedal, making it easier for the driver to stop the vehicle. Typically found in power brake systems, it works with the master cylinder to ensure smooth, responsive braking, improving safety and reducing driver effort.

Brake Booster Pump Assembly (47070-47060)

Brake Booster Pump Assembly for Toyota Prius 2010–2015 hybrid models

High-resolution image of Toyota 47070-47060 brake booster pump assembly

High-resolution image of Toyota 47070-47060 brake booster pump assembly

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1. Introduction

      The  Toyota Prius 3rd Generation Brake Booster Pump Assembly (47070-47060) is an essential part of the hybrid vehicle’s braking system, designed to enhance brake responsiveness and safety. It combines vacuum-assisted and hydraulic technologies to amplify the driver’s braking effort, ensuring smooth and efficient stopping even under regenerative braking conditions. This assembly works closely with the master cylinder and ABS system to maintain precise brake control and stability. Engineered for durability and reliability, it helps reduce pedal effort, improves driver comfort, and supports the Prius’s hybrid energy management by integrating seamlessly with electronic brake control systems, making it a vital component for overall vehicle performance.

Related parts and Accessories

• Brake Master Cylinder:-Converts pedal force into hydraulic pressure.
• ABS (Anti-lock Braking System) Unit:- Prevents wheel lock during sudden braking.
• Brake Pedal Sensor:-Detects pedal position and force for electronic brake control.
• Regenerative Braking System:- Integrates with hybrid motor to recover energy while braking.
• Brake Fluid Reservoir:-Stores and supplies brake fluid to the system.
• Electronic Brake Control Unit (EBCU):- Manages braking force distribution and integration with hybrid systems.

2. Brake Booster Pump Assembly Wiring Diagram & Pinout

A. Connector Location

• Brake Booster Pump Assembly Position: Located in the engine bay’s driver side near the firewall beside the master cylinder assembly.


• Connector Type:
  • A17 (2 pin) Gray housing
  • A18 (2 pin) Black housing

B. Wiring Table

Brake Booster Pump Assembly (A17) (A18)

A17 TERMINALS OF Brake Booster Pump Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
A17-1	BM1	(B) Black	➔ * A58 29 (MRO1) [Skid Control ECU with Actuator Assembly]
A17-2	GND1	(W-B) White/Black	➔ * ▼ A4 (Ground Point)

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A18 TERMINALS OF Brake Booster Pump Assembly Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
A18-1	GND2	(W-B) White/Black	➔ * ▼ A3 (Ground Point)
A18-2	VGND	(B) Black	➔ * A58 30 (MRO2) [Skid Control ECU with Actuator Assembly]

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