Home Screen: Scanner (Vehicle Identification) > (Vehicle System Menu) > (Vehicle System Main Menu) > (Functional Tests)
Functional Tests provides access to vehicle‑specific subsystem tests.
Functional Test functionality, availability, navigation and terminology is vehicle manufacturer dependent, and will vary.
Typical functional tests:
| ● | Information Tests—read-only tests (i.e. selecting “VIN” to display the VIN of the vehicle). |
| ● | Toggle Tests—component state change tests (i.e. switching a solenoid, relay, or switch, between two operating states). |
| ● | Variable Control Tests—command variable value tests (i.e. varying spark timing in 1° increments or EGR valve duty cycle in 10% increments). |
| ● | Reset Tests—reset the adaptive, or learned, values that are stored in the vehicle electronic control module memory. |
| ● | Scripted Tests—preconfigured tests that are run when performing certain repairs (i.e. bleeding brakes with ABS). |
Follow all screen instructions while performing tests.
Different toolbar controls are used depending on the functional test. Some tests use a Test icon to switch actuators on/off, and some require variable controls selection to increase and decrease a testing value.
Some tests provide a Data List icon 
, which allows you to change which data displays.
Toggle and variable control tests often display functional test controls on the toolbar at the top of the screen with PID data in the main body.
See the following examples of functional test screens:
Functional test example
Functional test example
Functional test example
Functional test example
