Connecting a Battery to Your MPVI Pro Interface for Troubleshooting

If you need to troubleshoot the analog inputs on your MPVI Pro interface to rule out a hardware issue, follow these steps:

Steps to Troubleshoot

1. Set Up the Scanner:

   • Insert the Raw Voltage PID into the #1 slot in your table display in VCM Scanner.

2. Prepare the Wires:

   • Cut two 3–5" long pieces of 16–20 gauge wire.
   • Connect one piece to the #1 port on your MPVI Pro.
   • Connect the other piece to the #5 (ground) port on your MPVI Pro.

3. Connect to the Battery:

   • Attach the wire from the #1 port to the positive terminal of a new AA battery.
   • Attach the wire from the #5 port to the negative terminal of the AA battery.

4. Begin Logging:

   • Connect your MPVI Pro interface to your vehicle.
   • Open VCM Scanner and start logging data.

Expected Results

• Without the Battery Connected:

  • The voltage will typically hover around 1.34–1.37 volts, which is normal.

• With the Battery Connected:

  • A new AA battery should output approximately 1.5–1.6 volts.
  • If the scanner reads this voltage accurately, the MPVI Pro hardware is functioning correctly.

Troubleshooting Other Issues

If your MPVI Pro is reading the voltage correctly but you're still encountering issues, the problem may be elsewhere:

• Incorrect Custom PID: Verify that any custom PID configurations are correct.
• Wideband Controller Configuration: Ensure your wideband controller is properly configured and functioning.

For additional assistance, refer to the relevant user guides or contact HP Tuners Support.

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