NOTE: If you don't already know how to choose the correct model and system, please view the section on selecting the model and year first, then click the back button on your browser to get back here

 

Start by clicking [Output Tests]

Screen-shot-of-VAUX-COM-output-tests

Then choose the item you want to control from the list

screen-shot-showing-VAUX-COM-output-test-choice-screen

 

To send the command to the ECU to switch the item on click [Start Activation], and to send the command to switch it off, click [Stop Activation]

Screen shot 2 showing more detail on fuel pump output test

 

Simple components like relays are usually either switched on or off. You'll usually need to listen to it, or feel the relay, or monitor it's output while you use VAUX-COM to switch it on and off to check it is reacting to the command. VAUX-COM will show you live data to indicate whether the relay control circuit is being controlled or not, but since a relay is a partly mechanical component, you'll need to also check it directly

Additional information