What is a Bypass Module and Why Do I Need One?

When it comes to remote car starters, clients of Certified Autosound in Chilliwack, Abbotsford and Maple Ridge often ask why we need to include a bypass module in our installations. The simplest answer is that these modules replace bundles of relays to perform crucial functions that ensure remote car starter’s reliability. Let’s look at how these modules work, and why we need them.

What is a Bypass Module?

Modern cars and trucks use complex computerized control systems to manage the engine, drivetrain and such vehicle functions as door locks and security. These systems, also called data networks, speak many languages — CAN bus, Class 2, GM-LAN and GM Most are some of the more common systems. Our bypass modules, perhaps better known as interface modules, talk to these networks in the vehicle to gather information and control specific functions.

What Does an Integration Module Do?

An integration module’s main function is to authenticate the remote car starter with the factory security and ignition systems to allow the vehicle to start. Unlike older technologies that required keys or fobs to be hidden under the dash to bypass security features, our integration modules speak the same language as the vehicle computer and let them know it’s OK to start. Once started, the vehicle continues to watch for the presence of the factory key in order to be driven away. This process is completely secure and very efficient.

In push-to-start and tip-start vehicles, the integration module sends the start command from the remote starter to the engine management computer. With the command received and module authenticated, the car will start just as if someone were sitting in the driver’s seat.

Vehicle Accessory Control

Another important function of our integration modules is controlling vehicle features. The most common are door lock and unlock. When you press the lock button on your remote car starter remote, the system sends a digital command to the integration module, which tells the body control module (BCM) to lock the doors. This digital communication eliminates the need to tap into high-current wiring in the vehicle and saves a great deal of time during the installation process.

Remote Car Starter Installation Experts

If you are in the market for a remote starter for your car, truck or SUV, drop into the Certified Autosound location nearest to you. A member of our sales team would be happy to design a system that meets your needs and provides you will the range, communication features and vehicle control functions you want. For more information, give us a call or send an e-mail using our online contact form.