EZ Lynk is a popular tuning and control solution for diesel trucks, particularly those equipped with Cummins, Duramax, and Powerstroke engines. It enables users to modify engine performance, bypass certain emissions systems, and manage features like Shift On The Fly (SOTF) functionality. The installation process varies depending on the make and model of the vehicle, but the core principles remain consistent across most applications. This article provides a detailed guide based on verified information from official and semi-official technical documentation, focusing on the step-by-step installation of EZ Lynk components, including the SGM cable, Auto Agent, and Shift On The Fly switch.
Overview of EZ Lynk and Its Components
EZ Lynk is a suite of tuning and diagnostic tools designed for diesel engine optimization. It includes hardware components such as the SGM (Serial Gateway Module) cable, Auto Agent device, and various tuning modules like the Mini Maxx V2 and Ironloader Tuner. These tools are primarily used for flashing vehicle ECMs (Engine Control Modules), modifying emissions components, and enabling user-friendly control over engine behavior.
The installation of EZ Lynk involves connecting the hardware to the vehicle's OBD-II port and CAN (Controller Area Network) systems, often requiring routing wires through the firewall and connecting to specific sensors. The process may also include software setup, such as installing the Auto Agent app and configuring the device to communicate with the vehicle's onboard systems.
Installation of the SGM Cable and Auto Agent for 2018+ RAM Models
For 2018 and newer RAM models, the installation of the EZ Lynk system requires the use of the SGM cable and the Auto Agent. The following steps outline the process:
Connect the Auto Agent to the OBD-II Port
The first step involves connecting the Auto Agent device to the vehicle’s OBD-II port, which is typically located under the dashboard near the driver’s seat. This connection is essential for establishing communication between the device and the vehicle’s onboard systems.Locate the Can-C Star Connector
The Can-C Star Connector is a central point for CAN bus communication and is usually found beneath the driver’s side of the dashboard. Once located, the EZ Lynk SGM Adapter is connected to an open port on the Can-C Star Connector. This allows the Auto Agent to communicate with the vehicle’s control modules.Secure the Auto Agent
After connecting the SGM cable and Auto Agent, the device should be secured using the supplied zip ties. It is important to avoid mounting the device on any components that may move or rotate, as this could cause interference or disconnection.Install the Auto Agent App
The final step involves downloading and installing the Auto Agent app on a mobile device. This app is available for both iOS and Android and is used to monitor, diagnose, and update the vehicle. Once installed, users follow the on-screen instructions to complete the setup and begin using the device.
Installation of the EZ Lynk Shift On The Fly (SOTF) Switch
The Shift On The Fly switch is a component used primarily in Cummins engines to enable manual shifting in automatic transmission vehicles. The following steps outline the installation process for the 2010–2018 Cummins EZ Lynk SOTF Switch:
Prepare Tools and Materials
The installation requires a few basic tools, including a flashlight, flathead screwdriver, snips, razor blade, a 5-foot length of metal wire for fishing through the firewall, zip ties, electrical tape, and a 13mm 3/8 deep socket.Open the Hood and Allow the Engine to Cool
Before proceeding with the installation, the hood should be opened, and the engine should be allowed to cool down. This helps prevent damage to components and ensures a safer working environment.Route the Wires Through the Firewall
To route the wires from the switch into the engine bay, a rubber grommet on the driver’s side of the cab is used. A slit is cut in the grommet with a razor blade, and a 5-foot length of metal wire is threaded through to the engine bay. The red, white, and black wires from the switch are then attached to this wire and pulled through the grommet into the cab.Connect the Wires to the Switch
Once the wires are routed, they are inserted into the male plug of the SOTF switch. The correct wiring order is as follows:- White wire: Left Terminal
- Black wire: Middle Terminal
- Red wire: Right Terminal
When installed correctly, the wires will lock into place, ensuring a secure connection.
Install the Switch and Connect to the CCV Sensor
The CCV (crankcase vent) sensor is located behind the valve cover near the firewall. To connect the SOTF switch, the CCV sensor must first be disconnected by sliding the red locking tab back and pressing down on the back of the gray sensor. The gray sensor is then slid off toward the driver’s side.The male plug of the SOTF switch is connected to the gray CCV sensor, and the red locking tab is slid back into place to secure the connection. After this, the wires are carefully routed and secured with zip ties to prevent contact with moving parts.
General Installation Considerations and Best Practices
While the specific steps for installing EZ Lynk components vary depending on the vehicle make and model, there are several general considerations and best practices that apply across most applications:
Ensure Vehicle Compatibility
Before beginning the installation, it is important to verify that the EZ Lynk system is compatible with the specific make, model, and year of the vehicle. This information is typically available in the manufacturer’s documentation or technical support resources.Follow Manufacturer Guidelines
Installation should always be performed in accordance with the manufacturer’s guidelines. This includes using the correct tools, following the recommended wiring order, and avoiding modifications that could compromise the vehicle’s electrical systems.Use High-Quality Tools and Materials
High-quality tools and materials, such as durable zip ties, electrical tape, and properly insulated wires, help ensure a safe and effective installation. Using substandard materials can lead to connection issues or even electrical failures.Test the System After Installation
Once the installation is complete, the system should be tested to ensure that all components are functioning correctly. This may involve starting the engine, checking for error codes, and verifying that the Auto Agent app is able to communicate with the vehicle.
EZ Lynk and Emissions System Modifications
EZ Lynk is often used in conjunction with emissions system modifications, such as EGR (Exhaust Gas Recirculation), DPF (Diesel Particulate Filter), and CCV (Crankcase Vent) delete kits. These modifications can improve engine performance by reducing backpressure and improving airflow, but they must be performed carefully to avoid damage to the vehicle or failure to meet emissions regulations.
The installation of these components typically involves disconnecting or bypassing specific sensors and components, which is where the EZ Lynk system plays a critical role. By providing a means to reprogram the vehicle’s ECM and manage sensor inputs, EZ Lynk allows users to maintain control over engine performance while complying with legal and safety standards.
Software Configuration and the Auto Agent App
In addition to the hardware installation, the EZ Lynk system requires software configuration. The Auto Agent app is a key component of this process, allowing users to monitor vehicle performance, update software, and manage tuning parameters.
The app is free to download from the App Store (iOS) or Google Play (Android), and it provides a user-friendly interface for interacting with the vehicle’s systems. Once installed, users are prompted to create an account or log in if they already have one. The account is used to store tuning profiles, monitor diagnostics, and receive updates from the manufacturer.
The app also includes features for troubleshooting and diagnostics, such as reading error codes, checking sensor values, and performing system relearns. These features make it an essential tool for users who want to maintain and optimize their vehicle’s performance.
Safety and Compliance Considerations
When installing and using EZ Lynk components, it is important to consider safety and compliance. While these systems offer significant performance benefits, they can also pose risks if not installed or used correctly. Some key considerations include:
Electrical Safety
Working with electrical systems can be dangerous if proper precautions are not taken. Users should always ensure that the vehicle is turned off and the battery is disconnected before performing any installation or modification.Compliance with Emissions Standards
Modifying emissions systems can result in the vehicle failing emissions tests or violating local regulations. It is important to understand the legal requirements in the user’s area and ensure that any modifications are compliant.Warranty Implications
Installing third-party tuning systems like EZ Lynk can void the manufacturer’s warranty on the vehicle. Users should review their warranty terms and understand the potential consequences before proceeding with any modifications.
Conclusion
The installation of EZ Lynk components, including the SGM cable, Auto Agent, and Shift On The Fly switch, requires careful planning, attention to detail, and adherence to manufacturer guidelines. While the process can be complex, it offers significant benefits for diesel truck enthusiasts and DIY users looking to optimize engine performance and control.
By following the step-by-step instructions provided in official documentation and using high-quality tools and materials, users can ensure a safe and effective installation. Additionally, the use of the Auto Agent app allows for ongoing monitoring and management of the vehicle’s systems, providing a comprehensive solution for tuning and diagnostics.
As with any vehicle modification, it is important to consider the legal, safety, and compliance implications of using EZ Lynk. By doing so, users can enjoy the benefits of enhanced performance while minimizing risks and ensuring long-term reliability.