Toyota prius 3rd Gen Camshaft Timing Oil Control Valve (Intake Side) "VVT Valve"

Toyota Prius 3 ^rd Generation (XW30)

Camshaft Timing Oil Control Valve Assembly (Intake Side) "VVT Valve" Wiring Guide: DIY Pinout Diagram

What is: The Camshaft Timing Oil Control Valve (Intake Side), commonly called the VVT valve, regulates engine oil flow to the intake camshaft actuator. Controlled by the ECM, it adjusts valve timing based on engine speed and load. This improves fuel efficiency, engine performance, and reduces emissions by optimizing intake valve opening timing.

Camshaft Timing Oil Control Valve Assembly (Intake Side) "VVT Valve" (15330-37010)

Toyota Prius VVT-i oil control valve intake side engine component view

Camshaft timing oil control valve intake side Toyota Prius 2010–2015

Toyota 15330-37010 camshaft timing oil control valve intake side

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1. Introduction

      The  Toyota Prius 3rd Generation Camshaft Timing Oil Control Valve (Intake Side), also known as the VVT Valve (part number 15330-37010), is a key component of the engine’s Variable Valve Timing (VVT-i) system. It is electronically controlled by the Engine Control Module (ECM) and uses engine oil pressure to regulate the intake camshaft timing. By precisely adjusting when the intake valves open and close, the VVT valve helps the Prius engine operate efficiently across different driving conditions.

      In the 3rd-generation Prius, accurate valve timing is especially important due to the hybrid system’s frequent engine start-stop operation. The VVT valve improves low-speed torque, enhances high-speed performance, and contributes to smooth engine transitions between electric and gasoline modes. It also plays a major role in reducing fuel consumption and exhaust emissions. When functioning correctly, the valve ensures stable idling, responsive acceleration, and optimal combustion. A faulty or clogged VVT valve can lead to rough idle, reduced power, increased fuel usage, and diagnostic trouble codes related to camshaft timing.

Related parts and Accessories

• Engine Control Module (ECM):-Controls and monitors the VVT valve operation based on engine conditions.
• Intake Camshaft VVT Actuator (Cam Phaser):-Changes the camshaft timing using oil pressure supplied by the VVT valve.
• Camshaft Position Sensor (Intake):-Provides camshaft position feedback to the ECM.
• Crankshaft Position Sensor:-Helps the ECM calculate precise camshaft-to-crankshaft timing.
• Engine Oil Pump:-Supplies pressurized oil required for VVT operation.
• Engine Oil Passages & Oil Filter:-Ensure clean oil flow to the VVT valve and actuator.
• Wiring Harness & Connectors:-Carry control signals between the ECM and the VVT valve.

2. Camshaft Timing Oil Control Valve Assembly (Intake Side) "VVT Valve" Wiring Diagram & Pinout

A. Connector Location

• Camshaft Timing Oil Control Valve Assembly (Intake Side) "VVT Valve" Position: The VVT valve is mounted on the cylinder head at the intake camshaft side, near the timing chain cover.




• Connector Type:
  • D25 (2 pin) Gray housing

B. Wiring Table

Camshaft Timing Oil Control Valve (Intake Side) "VVT Valve" (D25)

D25 TERMINALS OF Camshaft Timing Oil Control Valve (Intake Side) "VVT Valve" CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
D25-1	+	(Y) Yellow	➔ D28 36 (OC1+) [Engine Control Module]
D25-2	-	(G) Green	➔ D28 59 (OC1-) [Engine Control Module]

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