AEM 30-6821 Series 2 Plug & Play EMS - Manual (Page 6)

Page 6 of 21
AEM Electronic Throttle Control System (ETC)
The 30-6820 EMS incorporates an ETC system which controls the OEM electronic throttle body. All
components of this system, unmodified and as delivered from the manufacturer, are required for optimum and
safe functionality of this system. These components include, but are not limited to, wiring, ETC relay,
accelerator pedal assembly, and throttle body.
The EMS ETC control system incorporates multiple failsafe strategies such that in the event of a component
failure, the system will shut down the ETC system and, if necessary, the engine in a graceful manner. It still
remains the use
r’s responsibility to ensure that all vehicle, component, and wiring systems are maintained to a
level of workmanship consistent with industry standards.
Note: As the EMS is intended for use on vehicles that are to be operated off-road only, the factory cruise
control system will be non-operational after installation of the EMS.
Installation Information
The 30-6820 AEM EMS was designed to work with the vehicle, its components, and wiring as delivered from
the manufacturer. If any of the components or wiring have been changed or if the drive-line from the original
vehicle has been placed in another vehicle such in a custom race application then the user should take heed of
the following notes.
A mechanical Wide Open Throttle/”WOT” accelerator pedal travel stop is installed in the floor and/or carpet of
the vehicle as delivered from the manufacturer. If this stop is removed for any reason, such as removing the
carpet for use in a race vehicle, the user must ensure that a stop of some sort is fabricated and installed. This
stop must be fabricated such that there is a minimum clearance of 0.250 inches between the accelerator pedal
mounting bracket and the accelerator pedal actuating rod when the pedal is at WOT. See Figure 1.
Figure 1 - Minimum Pedal to Bracket Clearance
The CRUISE and SET/COAST buttons, and the CRUISE and SET dashboard indicator lights are an integral
part of the ETC system calibration and diagnostic functions. It is, therefore, not recommended that these
buttons and lights be completely removed from the vehicle such as could be the case with a purpose-built race
vehicle. If the OEM steering wheel and/or gauge cluster have been removed, please temporarily re-install them
to calibrate the ETC unit, or add switches and lights to the vehicle as shown: