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software works on almost all OBD2 GM vehicles, covering most 1996 and newer models. When reprogramming older GM vehicles, be very careful not to interrupt the operation. Some of the older modules may not be easily recoverable if reprogramming fails. Newer CAN vehicles do not seem to have this problem, and overall the risk is small as long as you are careful (i.e. don’t unplug the equipment in the middle of a reprogramming operation.)

Chrysler The Chrysler J2534 service works similarly to Ford’s FMP. Visit www.techauthority.com to subscribe and download the reprogramming software. You’ll need an Internet connection initially, to download the calibration file, but it’s not required during actual reprogramming. The service fee is $20 per day, or $200 per month. For this price, you get access to not only the calibrations, but also the service information on the website. Once downloaded, you will be prompted to enter the vehicle information so you have access to the latest calibrations. Chrysler’s application works on most OBD2 vehicles, again 1996 and newer. Figure 8 shows the J2534 programming with Chrysler.

Honda Honda and Acura require a base ServiceExpress membership plus a subscription to their CD-based J2534 reprogramming service. Visit techinfo.honda.com to see a matrix of reprogrammable vehicles, subscribe, and download the reprogramming software. The basic membership costs $20 for a 3-day subscription, $50 per month, or $250 per year. The reprogramming CDs are an additional fee of $300 per year. The ServiceExpress membership includes access to TSB’s and online service information. Honda mails updates through the year, and you won’t need an Internet connection during reprogramming. Although the 1996 Acura RL and 1997 Prelude can be flashed, neither Honda nor Acura have widespread reprogramming support until model year 2002.

Toyota Toyota’s J2534 software is CD-based like many others, and can be purchased from techinfo.toyota.com. From the CD you can pick the calibration and update the vehicle. A screenshot from Toyota’s Calibration Update Wizard is shown in Figure 9.

Many other manufacturers offer J2534 subscription services, as listed in Table 1. Although each one has a unique user interface, they all follow the same basic principles. They are designed to allow you to perform updates to the calibration software inside newer vehicles. After using a few different versions, you will become comfortable with the reprogramming process.

Closing Reprogramming and J2535 is relatively new, but it’s here to stay. There are an estimated 75-100 million programmable modules on the road today, with factory updates available for over half of them. Automakers are manufacturing vehicles with more and more of these modules, so the numbers will only increase.

Drew Technologies, Copyright 2009

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