Condition Settings

Nexus Series Firmware Help › Generics › Generic OutputUpdated Sep 2026

Condition Settings are the logic behind a switched generic output on a Nexus ECU. Pick up to three channels, compare each to a value, and decide whether all or any of them must be true. Here's how it works.

A generic output set up as a State output is either on or off. The Condition Settings node is where you decide when it's on. Think of it as a small if-statement: if coolant is above this, and speed is below that, switch the output on. This node only appears for State outputs.

The settings

  • Number of Conditions: how many channels feed into the decision, from one up to three.
  • Select: the ECU channel to test, such as engine RPM, coolant temperature or a switch input.
  • Maths: the comparison to make. You get the six you would expect: matches (=), does not match, above (>), below (<), and the inclusive versions of above and below (>= and <=).
  • Value: the number the channel is compared against.
  • And/Or: how conditions combine. And means every linked condition must be true. Or means any one will do.

A quick example

Say you want an intercooler water spray pump that runs only on boost with the car moving. Condition 1 could be manifold pressure Greater Than your chosen boost level, joined with And to condition 2, vehicle speed Greater Than a walking pace. The pump stays off in the pits and on light throttle, and runs when it's actually useful.

Tip

If an output flickers on and off right at a threshold, the channel is hovering around your value. Choosing a value with a little margin, or adding a second condition, usually settles it.

For the rest of the setup, see generic output wiring and the generic output table.