Toyota Prius 3rd gen Fuel sender Gage Assembly (R11)

Toyota Prius 3 ^rd Generation (XW30)

Fuel sender Gage Assembly Wiring Guide: DIY Pinout Diagram

What is: The vehicle fuel sender pump and gauge assembly is a combined unit inside the fuel tank that delivers fuel to the engine and measures the fuel level. The fuel pump pressurizes and sends fuel to the fuel system, while the fuel sender uses a float and sensor to transmit fuel level data to the dashboard gauge.

Fuel sender Gage Assembly (77020-47070)

Complete Toyota Prius SW30 fuel pump and level gauge assembly

Electrical connector and fuel outlet of Prius fuel sender assembly

Toyota 77020-47070 fuel sender pump with float mechanism

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1. Introduction

      The  Toyota Prius 3rd Generation Fuel Sender Pump and Gauge Assembly (77020-47070) is an integrated fuel delivery and level-sensing unit installed inside the fuel tank. It supplies pressurized fuel to the engine through the electric fuel pump while continuously monitoring fuel quantity using a float-type sender and variable resistor. The assembly communicates accurate fuel level data to the combination meter and hybrid control system, ensuring reliable range calculation and fuel management. Designed specifically for the SW30 Prius platform, it supports stable engine operation, efficient fuel usage, and precise low-fuel warnings, contributing to overall hybrid system reliability and driving efficiency.

Related parts and Accessories

• Fuel Tank:-Houses the pump and sender assembly
• Engine Control Module (ECM):-Controls fuel pump operation and engine fueling
• Circuit Opening Relay:-Supplies power to the fuel pump
• Fuel Pressure Regulator:-Maintains correct fuel pressure
• Fuel Injectors:-Deliver fuel to the engine cylinders
• Combination Meter (Instrument Cluster):-Displays fuel level and low-fuel warning
• Hybrid Vehicle Control ECU:-Uses fuel data for hybrid operation management
• Wiring Harness & Connectors:-Transmit power and fuel level signals

2. Fuel sender Gage Assembly Wiring Diagram & Pinout

A. Connector Location

• Fuel sender Gage Assembly Position: Located inside the fuel tank beneath the rear seat, accessible through a service cover on the vehicle floor.




• Connector Type:
  • R11 (5 pin) Dark Gray housing

B. Wiring Table

Fuel sender Gage Assembly (R11)

R11 TERMINALS OF Fuel sender Gage Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
R11-1	_	_	_
R11-2	FS	(B) Black	➳ LR1 44 ➔ L27 14 (L) [Combination Meter Assembly]
R11-3	FE	(W) White	➳ LR1 20 ➔ L27 15 (ES2) [Combination Meter Assembly]
R11-4	B (fuel pump positive)	(R) Red	➳ AR1 8 ➔ 1B 8 ➤ [ C/OPN Relay ]
R11-5	E (fuel pump GND)	(W-B) White/Black	➔ R31 8 ⬌ R31 7 ➔ ▼ R1 (Ground Point)

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