Use Power Supply Mode to maintain battery voltage in a vehicle between 13.00V and 15.5V to allow for uninterrupted reprogramming of the vehicle’s computer, retain vehicle system settings, or simply to maintain battery voltage.
At any time during the test, tap 
to return to the previous screen; or 
to return to the Main Menu.
1. Connect the Diagnostic Device test clamps to the battery.
2. At the Main Menu, tap Power Supply. The Acquire VIN screen is displayed.
3. Use the connected bar code scanner to scan the VIN bar code, usually located on the driver’s side door frame. The VIN can also be entered manually.
For best results, scan the barcode located on the driver’s side door frame. A two- tone beep indicates the scan was successful. A single beep indicates the barcode was not successfully scanned.
The VIN is also displayed behind the windshield on the driver’s side dashboard.
Driver’s Door Frame
NOTE: See the Recommended Scanning Procedure article for VIN scanning help and tips.
Manual Entry: Use the on-screen keypad to manually type the 17-digit VIN — the displayed digit counter will count up the alphanumeric characters as they are entered on the keypad. Tap NEXT.
4. Enter the battery information and power supply parameters.
NOTE: See the Battery Information Definitions article for complete parameter definitions.
5. If the displayed information is correct, tap Start to begin.
NOTE: The Battery Type, Units, and Rating fields must be filled in before proceeding.
Power Supply Results
The test results are displayed on the charger screen.
To send the test results to a configured printer or via email, tap Send Results and select an option. To return to the Home Screen, tap Done or to return to the Main Menu.