Relay low side outputs are all "switch to ground" pins. They differ from PWM Low Side Outputs in that they cannot be driven by "PWM" functions (as they cannot be updated at more than 5Hz) such as idle, VVT etc, and instead, should be used to drive relays (or slow acting solenoid valve), such as the fuel pump, cooling fans, air-conditioning relay etc.


Current ratings depends on the model of ECU you're using, but they are typically <1A per channel.


An example of how you would wire a relay to one of these pins is shown in the Wiring Section.


You can see the typical usage for some of these outputs on the below image of the Output Settings dialogue.


You can use Test: Slow Toggles or Test: On/Off to test these outputs.