GM began service programming of Engine Control Modules (ECM) on some vehicles in the 1993 model year. By the 1996 model year, nearly 100% of GM vehicles had programmable ECMs. Soon after, Body Control Modules (BCM), ABS modules and other controllers were reprogrammable as well. Today, some GM vehicles, such as the 2010 Camaro, have as many as 38 reprogrammable controllers. That number will only continue to grow as more and more electronic features are added and electrical and communication systems become more sophisticated.
Reprogramming can be used by OE manufacturers to update module software to improve or modify operation. Most manufacturers now release software revisions regularly to update system operations, engine and transmission calibrations, and service part changes or replacements.
For example, a simple repair procedure such as replacing a window regulator may require a window motor relearn procedure in the BCM to be performed using a scan tool.
Return On Investment
Many service centers have taken the first step to reprogramming by purchasing a J2534 tool for emissions-related issues. The SAE J2534 standard was designed to provide a low-cost reprogramming solution to the aftermarket that covers Powertrain Control Module and Transmission Control Module reprogramming for 2004 and newer vehicles. Reprogramming access for non-emissions-related modules is not mandatory, however, many manufacturers allow vehicle control modules to be reprogrammed.
The next move is to determine how many repairs in your shop deal with reprogramming non-emissions-related components. The bottom line will be affected by your shop's ability to sell reprogramming just like any other service.
To determine how much of an investment would be needed to perform reprogramming, first add up the cost of any reprogramming equipment (diagnostic tool, interface device, software subscription).
Next, determine how much the service center would charge the customer for reprogramming services (typically, this service ranges from $80 to $120) and subtract technician labor time to find your gross profit.
Divide the investment costs by the gross profit to reveal the number of reprogramming jobs that it would take to break even.
Programming Subscription
TIS 2 Web is GM's Web-based programming application and software that includes Service Programming Systems (SPS) for GM vehicles (required to reprogram GM vehicle control modules), Tech 2 scan tool software download, and the Tech 2 View and Tech 2 Snap Shot diagnostic applications. It can be used with generic J2534 devices.
Several TIS 2 Web subscriptions are available:
· Option 1- TIS-All (GM, Saturn, Saab)
· Option 2 - TIS-SPS (GM, Saturn, Saab; service programming software only)
· Option 3 - TIS-All Saab (Saab only)
· Option 4 - TIS-Tech 2 Updates (Tech 2 software only)
For complete details on TIS 2 Web or to subscribe, go to http://www.acdelcotechconnect.comand click the TIS 2 Web link under GM Service Information on the left side of the page.
Information about GM vehicles that have had updated calibrations for reprogramming released is available for free online. Go to tis2web.service.gm.com/tis2web to input a specific vehicle's VIN; the site will return the vehicle's calibration history. (Fig. 12)
(Fig. 12)
Tools and Equipment
The equipment needed to perform complete reprogramming on GM vehicles includes a compliant J2534 interface device or scan tool with programming capability such as the Tech 2, as well as a computer with the appropriate operating system and a high-speed Internet connection.
One available interface device is the Bosch Mastertech Vehicle Communication Interface (VCI) (Fig. 13), which is designed to connect the vehicle to a TIS 2 Web PC to transfer data and reprogramming calibrations to the vehicle control module. The VCI also offers domestic and Asian OEM scan tool functionality back to the 1996 model year as well as J2534-2 reprogramming.
(Fig. 13)
Tools for GM reprogramming can be purchased from Bosch Diagnostics, OTC or GM Dealer Equipment. For more information, go to www.acdelcotechconnect.com, click the TSS tab and select the Bosch diagnostics equipment link, or go to www.gmdesolutions.com/services.
To review recommended computer hardware specifications and Internet connection guidelines, visit www.gmdesolutions.com/services/standards.php.
More Information
To learn more about service programming, there are several training programs available through the ACDelco Learning Management System, including hands-on courses, seminars and Web-based TechAssists. Go to www.acdelcotechconnect.com and click the Training tab.
The NASTF website, www.nastf.org, also has a reprogramming section that lists manufacturers' requirements and tool information.
In addition, the ACDelco eBusiness Help Desk can answer questions regarding TIS 2 Web and service programming. Call 1-888-212-8959 for more information.
- Thanks to Bob Stewart
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