Schematics are available on the internet for devices that can be used to convert the ALDL voltages to those of the RS-232 standard, allowing the raw data to be read with a computer having a serial port and the proper software. Multiple scanner software programs are available. TunerPro RT is one of the most flexible and most popular. Download FreeScan for free. FreeScan is a vehicle scantool for connecting your personal computer up to a car's computer. It has been designed to interface with 8192 baud, GM based, ALDL vehicles. WinALDL is software to datalog on GM vehicles that use the old 160 baud rate. This includes but is not limited to vehicles using a 1227747 and 1227165 ECM. Most older TBI GM computers will speak this protocol. Install the ALDLdroid application from Google Play. Using a file manager application, copy your ADX file into the /ALDLdroid/adx directory. Connect the ALDL cable to your vehicle diagnostic port. Hit the Connect to ECU menu in the application and watch the data come in! USB to ALDL CABLE. Plug your laptop into the ALDL port of your 82 to 95 GM car or truck and see what is happening under the hood. Use as a scan tool. ALDL Vehicles Covered.
OBD1 is an old standard implemented in all cars in the world back in 1980's. Hence it's very limiting in quality and quantity of data it can report.
For example newer OBD2 can report up to 15,000 possible data parameters (called PID's). While OBD1 can give you up to 300 data parameters. Those 300 parameters can still be useful to mechanics for things like O2 sensors and carbon emission tests.
Because OBD1 is very old, this also makes 90% of OBD1 vehicles nowadays impossible to scan — because you can only obtain the scanner from OEM manufacturer.
Nevertheless, TOAD® software supports more OBD1 vehicles then any other scanner in the world.
Best way to find if your OBD1 vehicle is included on this page — is to perform a search in your browser for your vehicle model. Use different combinations. Eg: Holden, Commodore, VT, V6, etc.
Free Obd1 Software Download
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