Fan, Water and Fuel Pump Outputs
These functions are used to drive relays for
functions around the engine. For a better
overview of what the available outputs are, see
Output Channels in the Outputs
menu.
The coolant fan and water pump use a start
temperature at which point the outputs are
activated, and will deactivate when the
temperature has fallen below this temperature
minus the hysterisis value.
You can use the water pump output function
to drive a second stage coolant fan if that is
more useful to you.
When the ECU is started it will drive the fuel
pump relay for a given number of seconds, this
is used to prime the system and can be useful if
you have no check valve in the system and need
to build pressure before starting.
Once the engine stops turning (no trigger
signal) the pump will turn off after a given
number of seconds of inactivity.