AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual - Manual (Page 336)

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© 2014 AEM Performance Electronics
Infinity User Manual
General Purpose Outputs
General purpose outputs (GPO) are one of the many things that separate a programmable ECU
from a chipped or reflashed ECU. These outputs can be triggered for multiple actions based on
engine speed, throttle position, engine load, coolant temperature, vehicle speed, etc.
Before proceeding, check the Application Notes included with your Infinity ECU to see which, if
any, spare GPOs are available. Some vehicles will use more outputs than others. For instance,
there are many outputs required to drive the various solenoids associated with an automatic
transmission.
There are two types of GPOs: LowsideSwitch and HighsideSwitch outputs. The Infinity
LowsideSwitch outputs a 4A (max) capable ground signal. The HighsideSwitch outputs a 0.7A
(max) capable 12V signal.
The picture above depicts a HighsideSwitch output controlling a low current buzzer. This is
similar to how a LowsideSwitch would be wired, except it would be connected to a 12V source
instead of a ground lug ring terminal.
If the component being driven runs higher than the specified driver's capability, it is
recommended to wire in a relay to the circuit.