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ETHOS Edge Training Module 5

Applies To: ETHOS® Edge

Functional Tests: Scanner Functional Tests, Scanner Output Controls, Actuator Tests, Custom Data List



Welcome to Snap-on Training Solutions. This module is designed to help you get the most out of your ETHOS Edge diagnostic tool, and covers the use of scanner functional tests.

Scanner Main Menu (Engine) 1 – Functional Tests highlighted

Functional Tests are a great way to isolate the cause of a problem among the controller, a component, wiring or other issues.  Functional tests let you override the vehicle controller to take control of a system and determine if the vehicle responds properly or not.

From the Main Menu select Functional Tests. 

Functional Test Menu 2 – Injector Balance highlighted

Select the Injector Balance test

Injector Balance Test 1

Injector Balance Test 2

The next screens give us step-by-step test instructions. Select Continue.

Injector List

Select each injector one at a time to disable it.

Video footage

If you are using a fuel pressure gauge in conjunction with the test, compare pressure drop between cylinders. 

Injector List

Select an injector once to deactivate and again to activate. 

Functional Test Menu 2 – Output Controls highlighted

Output Controls

Actuator Tests

Other useful types of functional tests are Actuator Tests which check operation of devices like solenoid valves, motors and relays. And Output Controls, which monitor live output data from the vehicle while you activate vehicle components.

Select Test screen - AC Relay Graphs (On/Off) highlighted

A good example of a powerful Output Control is the AC Relay Test.

AC Relay (On/Off) Graphs

Select the test and the AC Relay control shows at the top of the screen, and the live data parameter view opens.

AC Relay Graphs (On/Off) drop-down menu

By using the functional test and selecting ON, you are overriding the controller. If you command the relay to turn ON and it does not activate you’ve just eliminated the controller from the possible causes. This pinpoints the likely problem to the relay or wiring. Click on the checkmark icon.

Custom Data List Menu 1 (checked)

Customer Data List Menu 2 (unchecked)

Let’s view data parameters relevant to the AC Relay Test. First use the Select All icon to deselect all parameters.

Custom Data List menu 2

Select just the parameters you want for your diagnosis. To perform the AC Relay test we will select AC-related data.

AC Data Graph

This will speed the data refresh rate to help you catch short intermittent glitches. Here's your Custom Data list. Now you can observe the vehicle data response when you command the AC Relay On and Off.

Last Updated: July 8, 2020

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