The Accessport will store the ROM information after it is installed to the car. Sometimes you may see that we provide parts or tuning for your make and model, but if your market is not listed, the parts may not work on your specific car. What should I look for when buying car tires? "Donuts are cool." A common problem we often help costumers figure out is, what “Domestic Market” their car belongs to and how it affects their ability to purchase aftermarket parts. Then, you will know exactly where to start with your modification process. There can be dozens of variations of ROMs that need to be identified in order for the software to recognize the vehicle, it can take a long time to track them all down. How do you think about the answers? As I stated before, a car is only actually JDM if it was sold for the Japanese market, if your Nissan has a steering wheel on the left side of the car…it’s not JDM. USDM: Most ROMs/cars in North America will fall under the USDM designation. The Accessport will only communicate with an ECU. Join Yahoo Answers and get 100 points today. Often, what that means is that they applied a new ROM to the ECU. If you ever have questions or need clarification please contact our support team: Phone – 866-922-3059 You can sign in to vote the answer. What exact car and engine are you expecting to combine? hi, i have a 2002 wrx that I imported from Japan. The majority of the cars in the world will fall under one of the following DMs. **IMPORTANT NOTE** – This information is exclusively relevant to ECU Identification and Tuning. Email – support@cobbtuning.com. Here is a simple guide for – How to Dump an Unknown ROM File. You can find it at any time by following these steps: As mentioned before, it is possible for your car to be supported but not the ROM on the car. If you went to the cross town rivals that don't have ADMs, and looked at the exact same model of car, with the exact same options, and it cost 20k, they'd show you 2k for yours, and 20k for theirs. What is the best way to go about tuning my vehicle to boost performance. When shopping for parts on the COBB website, the easiest way to be sure you are purchasing items that will be compatible with your vehicle is by using the Vehicle Configure option at the top of the homepage. That includes the UK and they will pop up in other nearby non-overseas areas. They have a specific meaning and use, but the enthusiast community has adopted the terms and distorted their meaning. “. I.E. The vehicle is new and we simply have not collected all of the ROMs in existence. Many of the comments and “rules” will apply to all aspects of a cars origin but this article exists purely to help someone determine what ECU ROM is most likely to live on your car’s computer. If it’s a Subaru, you have to keep the USDM ECU as we do not support the JDM cars. CHDM: Similar to JDM, these usually stay in China but will be found around Asia or even Australia. If you have ever taken a relatively new car to a dealership for service, and they “update” the car as part of the process. Lastly…it could just mean you have the wrong Accessport or your car is not supported at all. This isn’t something we’ve ever tested so you may run into compatibility issues. JDM: These will be almost exclusive to Japan, but occasionally they will be found in various parts of Asia or Australia. More often than not, that also includes cars in Mexico, but they do surprise us sometimes with cars from overseas markets. ECU is still the USDM from what my mechanic told me. Since the original ECU remained in the car you are able to use an Accessport for your 2014 WRX (AP3-SUB-003). That also implies you may need to do some work with the heads etc because the JDM engines commonly used are the 2.0L that have AVCS but the older USDM ECU’s can’t control that, so it has to be disabled mechanically. Sorry for the bad news. That being said, it’s actually a good thing that this is not true because most cars only have a few unique configurations for the entire world instead of needing one for every single different county. JDM and EDM are technical terms, not adjectives. The last drop down for “OPTIONS” will display all of the domestic markets that we support for your specific car. But lately (past several years) it has become attached to everything on the lot, and it's used as a negotiating tactic to show more money for trade-ins. what to do? This is especially important for tuning because in many cases, the car will use various versions of software on the ECU or even different hardware for separate markets even if the year and model of the vehicle are the same. Some platforms can be supported by a relatively small number of ROMs across the world, while on the other hand, some manufacturers make dozens of tweaks to ROM editions that can even change throughout the ownership of a single car. An important detail to understand is that ROMs and Domestic Markets don’t exist in parallel. If you went to the cross town rivals that don't have ADMs, and looked at the exact same model of car, with the exact same options, and it cost 20k, they'd show you 2k for yours, and 20k for theirs. Top ADM abbreviation related to Dealer: Additional Dealer Markup