Some earlier model vehicles (pre-2007) may require the use of the Tech2 and “Legacy Tech 2” programming option in SPS in order to utilize a slower programming communication speed. The GM Global Diagnostic System 2 (GDS2), a PC-based software application, is designed to diagnose and repair on-board automotive electronic systems. Reattempt programming using “Replace and Program ECU.” Auto Diagnosis, Key Programming, OBD Software Download. Reestablish and maintain battery power, and then attempt to communicate with the control module using MDI or Tech 2. If communication cannot be reestablished, deplete retained power by disconnecting the negative battery terminal for a minimum of 5 minutes. One year original GM online programming subscription is avaiable at GM SPS Programming Subscription User Tips 1.This GM online programming. If communication can be established, reattempt programming using “Replace and Program ECU” as the programming method. GM SPS programming subscription work with GM MDI2, VXDIAG VCX Nano GM and other J2534 devices,suppport programming by Tech2win, SPS Programming Software Unlimited VIN ,diagnosis via GDS2 ect. This should first be done with GDS2 or Tech 2. ![]() Attempt to reestablish communication with the module. Maintain a minimum of 12.5 volts during programming. ![]() This error typically stems from a loss of communication between the programming device and the module - which can be caused by either a drop in battery voltage, a delay in communication with the module or a vehicle issue, such as an interruption on the BUS (wiring, connector issue, aftermarket components, etc.).
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