How to Install and Activate Perfume Sprayer System in Vehicles using ACT V2 ECU Coding Tool
Feb 2, 2026
Many car owners aspire to upgrade the original factory ambiance features of their vehicles, such as the fragrance system, to enhance the driving experience. However, this task involves not only the installation of hardware but is more crucially the matching and activation of software. This article will, based on a detailed installation manual, break down the entire process of installing the car perfume sprayer (Perfume Sprayer) and highlight the core aspect - using the ACT V2 ECU Coding Tool for coding.
System Working Principle and Core Module Identification
The car perfume sprayer does not operate independently; its operation relies on the coordination of the in-car electronic network.
Core Four Elements Interaction: The system is jointly operated by the Body Control Module (BSI), the Entertainment Central Control System (NAC), the rear air conditioning module, and the perfume sprayer body. The power and communication connections are mainly carried out directly between the BSI, the rear air conditioning module, and the perfume sprayer, while the NAC achieves functional control through the on-board CAN network, without the need for additional physical wiring.
Module Identification Key Points:
The perfume sprayer module has an "identical twin" appearance to the standard rear air conditioning module, but there is a key difference: the perfume module uses a brown 6-pin interface, while the standard air conditioning module has this interface in black.
Some new models have adopted a module with a third independent interface (specifically for perfume control), and the structure is slightly different.
Detailed Explanation of Two Main Installation Schemes
Based on the existing configuration of the vehicle, you can choose one of the following schemes:
Option One: Replacement and Upgrade Method
This option is applicable to vehicles that already have a rear air conditioning module. The core of the operation is to directly replace the original rear air conditioning module with a similar type module that supports the fragrance function. Due to the compatibility of interface definitions, the main work becomes the physical replacement and subsequent coding.
Option 2: Dual Module Addition
This option is more common. That is, without removing the original rear air conditioning module, an additional rear air conditioning module is added and it is specifically coded as the fragrance control module. In most vehicle wiring harnesses, corresponding interfaces (brown 6-pin connector) have been reserved. Just find and insert them. If not reserved, then jumper connections need to be made according to the circuit diagram.
Connection and Accessories Selection
Installation Location: The perfume sprayer is usually installed within the dashboard structure near the glove compartment on the passenger side. Before installation, the glove compartment needs to be disassembled first.
Cable Harness and Accessories: It is strongly recommended to use the original factory cable harness and plugs to ensure reliability.
When locating the installation point, if an unused brown 6-pin plug is found in the integrated air conditioning cable harness, insert it into the white or blue socket of the new module, and the electrical connection is completed.
Purchase Suggestions: To simplify the process, it is recommended to purchase a complete kit that includes adapter plugs, which can automatically adapt to the blue or white module sockets on your vehicle.
Core Steps: System Encoding Using ACT V2 ECU Coding Tool
The hardware connection is just the foundation. To make the fragrance system display on the central control screen and work properly, encoding is an essential activation step. This is where professional equipment like the ACT V2 ECU Coding Tool plays a core role.
The following encoding operations need to be performed specifically:
Coding for the air conditioning module: Whether you have replaced the module or installed a new one, you need to connect to the vehicle's OBD interface using the ACT V2 tool and configure the corresponding air conditioning control module's parameters, informing the vehicle that it now has the fragrance control function.
Coding for NAC (radio/navigation system): This is the key to enabling the screen control menu. Use the ACT V2 tool to code the NAC system and activate its hidden fragrance control software interface.
Calling the control button function: This coding operation will simultaneously activate the virtual menu on the screen and the physical buttons on the control panel (if the vehicle is pre-installed with such buttons). Even without physical buttons, after coding, it can be perfectly controlled through the screen menu.
Possible additional coding: Depending on the vehicle configuration, it may also be necessary to add some related ambient lighting or other comfort functions for system linkage.
Function verification and precautions
After completing all the connections and coding through the ACT V2 tool, you should be able to find the "fragrance/scent" setting option in the "vehicle application" menu of the NAC main control screen.
Verification method: Enter the menu and you can select the type of fragrance, adjust the intensity of the aroma (spraying frequency). Even if the fragrance box is not inserted temporarily, as long as the menu can be displayed and operated normally, it proves that the hardware connection and encoding have been successful.
Note: If the encoding is not done correctly, the fragrance menu will not be able to be displayed, or the icon will show as unavailable and disappear.
The complete upgrade path from hardware to software
Installing the original factory perfume sprayer for the car is a DIY project that combines electrical knowledge and software debugging. The key to success lies in:
Accurately identify and properly connect the hardware modules and reserved plugs.
Understand that the system needs to be activated through coding, and this is the area of expertise of the ACT V2 ECU Coding Tool.
Strictly follow the coding process: start with the air conditioning module, then the NAC system, and each step is indispensable.
By following these steps, you can unlock this factory feature that enhances the luxury and personalized experience of your car without relying on a 4S store. Before getting started, make sure you know the model and interface of your vehicle's modules, and prepare a professional coding tool like ACT V2, so that you can achieve better results with less effort.
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