AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual - Manual (Page 335)

Wiring, Pinouts and Schematics 329
© 2014 AEM Performance Electronics
Grounding
The Infinity must have an electrically secure ground connection, which means that the battery
negative must be properly grounded to the chassis AND engine. The ground wire, whether it is
from the battery or to the chassis and engine, must have perfect electrical conductivity. This
means that there must not be any paint or rust under the wire terminal. Make sure to install the
ground wire to contact bare/exposed metal of the vehicle component. To prevent rust build up,
we recommend applying a protective layer of dielectric grease, such as Standard Ignition SL-4,
to the bare metal surface. The ground wire must be at least the same gauge as the power lead
to the ECU. AEM also recommends that the ground wire be as short as possible.
Power Requirements
The Infinity requires a minimum supply voltage of 10V or greater to run. We recommend that the
Infinity be supplied with 13.8V nominal operating voltage. Ensure that the vehicle’s charging
system is in perfect operating condition prior to installing. Like most modern OEM ECUs, the
Infinity requires a main relay for proper power distribution. Please refer to the diagram below for
the minimum connection required for power and ground. The system WILL NOT function correctly
unless wired exactly as below.
Power and Ground Distribution
Power and Ground Distribution - Schematic Link