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- All the vehicles of this generation speak the ALDL protocol for logging/vehicle communication. 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. Hardware for OBD1 GM Overview. 94-95 model years are oddballs.
- 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. Compatible with GM OBDI data streams that use the 8192 Baud, Pin M protocol AND the 160 Baud, Pin E protocol. USB to ALDL Cable comes with 3' USB extension cable, and Driver/Software CD.
- The ALDL Cable Let's look at the ALDL (Assembly Line Diagnostic Link) OBD1 interface cable first, since we sell low cost ALDL OBD1 interface cables. It may possibly be the only thing you will need to buy to do your own diagnostics. You can make your own cable, but it is much quicker and less headache to buy one already assembled and tested.
- 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.
Jan 03, 2016 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.
| This article will guide you on how to install ALDL USB cable on your Windows system. It will then successfully work with OBD-I software (like award-winning TOAD) and your car. (If this step is missed, then OBD software is not going to work. So it's CRUCIAL that you follow below steps). Other Resources: Where to buy ALDL Cable: USA / Australia |
Most ALDL cables come with a CD (drivers) and installation instructions. Refer to their instructions first.
Otherwise, proceed to Step 2.
Download ALDL Cable Drivers here.
Then unextract the file anywhere on your computer.
Active directory windows server 2012. Just click Next. Windows Server 2012 R2 Features8.
Once you plug-in the cable into your computer — Windows Vista, 7, 8 will likely install drivers automatically. Without you having to do anything. In which case you can immediately connect other end to the car, load up the OBD software and start scanning/tuning.
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Windows XP will ask you to specify/browse location of where drivers are found. Choose the same folder where you extracted drivers in STEP 2 above. It'll then install and you're all setup!
If driver install fails, then you can retry inside Control Panel. Here's how..
- Windows Vista/7/8: Control Panel » System » Device Manager
- Windows XP: Control Panel » System » 'Hardware' tab » Device Manager
You'll then see a device similar to 'USB Serial Port' under either 'Other devices' or 'Ports (COM & LPT)'.
Right-click and choose 'Update Driver Software'. Like this:
Then select the folder in Step 2 above.
Go to Control Panel.
- Windows Vista/7/8: Control Panel » System » Device Manager
- Windows XP: Control Panel » System » 'Hardware' tab » Device Manager
Expand 'Other devices' or 'Ports (COM & LPT)'. Whichever contains 'USB Serial Port'.
Next to 'USB Serial Port' — you'll see a number. Keep note of that number. EG: COM5.
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You'll have to specify that inside OBD software, so that it can recognize the cable.
All that's left now is to plug the other end of ALDL cable to your cars port.
Launch OBD1 software like TOAD — specify within the software your ALDL COM port number (as per Step 4 above), and Connect!
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Use this ALDL tester software to verify that your ALDL cable is recognized and properly installed to Windows.
It'll also tell you what COM port number (as discussed in Step 4 above), your ALDL cable is using.