Toyota prius 3rd gen Trottel Body Assembly (D4)

Toyota Prius 3 ^rd Generation (XW30)

Trottel Body Assembly Wiring Guide: DIY Pinout Diagram

What is: A Vehicle Throttle Body Assembly is a key component of the air-intake system that controls how much air enters the engine. It uses a butterfly valve that opens and closes based on accelerator pedal input, allowing the engine control unit (ECU) to regulate airflow, fuel mixture, and idle speed. Modern electronic throttle bodies use sensors and an actuator motor for precise, smooth, and efficient engine performance.

Trottel Body Assembly (22030-37060)

OEM Toyota 22030-37060 throttle body unit

22030-37060 throttle body mounted on intake manifold

Electronic throttle body actuator motor and sensor housing

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1. Introduction

      The  Toyota Prius 3rd Generation Throttle Body Assembly (22030-37060) is a vital component of the hybrid engine’s air-intake system, ensuring precise airflow control for smooth and efficient combustion. This electronic throttle body uses a motor-driven butterfly valve and integrated position sensors to regulate air volume based on ECU commands. It works closely with the hybrid control system to maintain optimal idle, enhance fuel economy, and reduce emissions. Designed for reliability, it prevents rough idling, poor acceleration, and engine stalling by keeping airflow stable under varying driving conditions. Its durable construction and accurate sensor feedback make it essential for maintaining the Prius’s signature smooth performance and high efficiency.

1. Directly Related Components
   • Mass Air Flow (MAF) Sensor :-Measures incoming air volume and temperature.
   • Engine Control Unit (ECU) :- Controls throttle motor position and fuel delivery.
   • Accelerator Pedal Position Sensor (APPS) :- Sends driver input to ECU for throttle commands.
   • Throttle Position Sensor (TPS):- Built into throttle body to report valve angle.
   • Idle Air Control Logic (within ECU):-Manages idle speed electronically.
2. Hybrid System-Related Units
   • Hybrid Control ECU:-Coordinates engine and electric motor load.
   • Inverter & MG1/MG2 Motor-Generators:-Influence throttle demand during hybrid transitions.
3. Emissions-Related Components
   • EGR Valve & Cooler:-Reduce NOx and affect airflow patterns.
   • EVAP System (Purge Valve) :- Controls fuel vapor flow into the intake stream.

2. Trottel Body Assembly Wiring Diagram & Pinout

A. Connector Location

• Trottel Body Assembly Position: Mounted on the intake manifold, between air duct and engine.


• Connector Type:
  • D4 (6 pin) Black housing

B. Wiring Table

Trottel Body Assembly (D4)

D4 TERMINALS OF Trottel Body Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
D4-1	M-	(P) Pink	➔ D2820(M-) [Engine Control Module]
D4-2	M+	(L) Blue	➔ D2821(M+) [Engine Control Module]
D4-3	E2	(G) Green	➔ D28111(ETA) [Engine Control Module]
D4-4	VTA2	(B) Black	➔ D2889(VTA2) [Engine Control Module]
D4-5	VC	(R) Red	➔ D2888(VCTA) [Engine Control Module]
D4-6	VTA	(Y) Yellow	➔ D2890(VTA1) [Engine Control Module]

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