Datalogging with an ALDU1

The ALDU1 is a simple logging cable.  It attaches to the USB port of your PC and to the ALDL logging port on your vehicle.  It allows your PC to communicate with your ECM.

Basic Connectivity

The ALDU1 uses a USB connection to talk to your PC.  It uses the same FTDI drivers that all of our other products use.  The first step in getting the AutoPROM working is to get your PC to recognize it.

  1. Turn on the computer you want to use with the APU1 and plug the APU1 in to a free USB port.
  2. Follow the instructions in the USB troubleshooting guide to ensure the device is recognized by Windows.
  3. Although it is mentioned in the guide above, make sure the ALDU1 is using a COM port between 1 and 8!  This is CRITICAL for some older software.
  4. The rest of the troubleshooting guides in this guide will assume that you have basic USB connectivity.

Using the ALDU for Logging with TunerPro

Before you will be able to log any data, you need to have the correct ADX definition file downloaded for your vehicle.  The best place to find these is the Definitions section of TunerPro’s website.

With that said, follow these instructions to get everything set up:

  1. Make sure the ALDU1 is connected to your PC and has a COM port between 1 and 8.  It will be necessary for you to know which COM port the ALDU1 is using to configure it properly.  Consult the instructions above for ‘Basic Connectivity’ for more detailed instructions.
  2. We’re going to walk through the TunerPro RT configuration steps to use this mode.  Your ALDU1 will NOT be recognized by TunerPro RT software like an Ostrich or APU1.  If you’re not using TunerPro, skip to step 7.
  3. Next, make double check TunerPro’s configuration for logging.  Start by going to Tools…Preferences
  4. Next, Tab over to the Data Acq. /Emulation tab. (red arrow)  Make sure that “Use Plug-in” is selected for Interface Type.  Make sure “TunerPro Data Acquisition I/O Interface” is selected under the component drop down box.
  5. Then click the “Configure Plug-in Component” box (green arrow).
  6. Make sure that “Standard Serial” is selected (green arrow) and the COM port of your APU1 is selected (blue arrow)
  7. IF THE ALDU1 IS UNPLUGGED FROM THE VEHICLE, you should be able to click the “Test For Valid Interface Using Settings” button and get a successful result.  You will NOT get a positive test if the cable is plugged in to the vehicle.
  8. If you are NOT using TunerPro RT, you should be able to start your software of choice and configure it to use the COM port of your ALDU1 (COM2 in this example)
  9. If you have trouble connecting, check the switch on the ALDU1.  Older applications that use 160baud require the ”10k across A-B” setting.  Later TPI, LTI and TBI applications use 8192 baud which requires the switch to be in the ”open between A-B” position.