Testing the Analog Inputs on Your Pro Link or Pro Link+

If you experience issues with your Pro Link or Pro Link+, you may be asked to troubleshoot the device by connecting it to a AA battery to rule out hardware failure.

Follow these steps to perform the test:

Step-by-Step Troubleshooting Guide

1. Open VCM Scanner.
2. Right-click on the Channels list and select Add Channel.
3. Navigate to External Inputs and select:
   • MPVI2, MPVI2+, MPVI3 > Pro Link, Pro Link+.
4. Double-click on A/D Input 1 (Red).
5. Connect the Red Wire (A/D Input 1) to the Positive (+) terminal of a AA battery.
6. Connect the Black Wire to the Negative (-) terminal of the battery.
7. Connect your interface to your vehicle and start logging.
8. Observe the voltage displayed in the Value column of the Channels list.

Expected Voltage Readings

- Without a Battery Connected: The voltage will hover around 1.34V - 1.37V (this is normal).

- With a New AA Battery Connected: The voltage should read approximately 1.5V - 1.6V.

Interpreting the Results

• If VCM Scanner reads these voltages correctly, the issue is likely not with the Pro Link hardware.
• Instead, check for:
  • Incorrect custom PID setup.
  • Improper wideband controller configuration.

If you continue to experience issues, contact HP Tuners Support for further assistance.