(eventually this page will have more information) Basics When we talk about “OBD1” GM vehicles, we mean vehicles made from (approximately) 1986 to 1995. These cars used several different types of engine controller – some have one injector for each cylinder (Tuned Port Injection, or TPI along with the LTx motors) while some have fewer injectors that are placed near the throttle body (Throttle Body Injection, or TBI) instead. All the vehicles of this generation speak the ALDL protocol for logging/vehicle communication. Vera Serial Interface Diagram. For purposes of this guide, “ECM” means Engine Control Module, Powertrain Control Module (PCM), Engine Computer Module (ECM) – terms will be used interchangeably to mean the same thing.

WinALDL is a program that reads the ALDL data from some supported ECM types. A simple hardware interface must be built to convert the ALDL data stream and make it compatible with a PC serial port. The original idea for. I have used information found on the internet when writing this software. I don't have. Last updated: Jan 2nd, 2018. ScanTool.net OBD-2 Software. ScanTool.net is open-source software originally designed by ScanTool.net developers. In 2009, we stopped developing ScanTool.net software and soon after unveiled OBDwiz. OBDwiz is exclusively free for all our OBDLink and ElmScan 5 customers who.