AEM 30-6600 Series 2 Plug & Play EMS User Manual
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Engine Wiring Harnesses, ‘swapped’ engine installations
Many Nissan wiring harnesses have been found to contain significant differences between
model years and/or trim levels. Likely differences include: Crank signal, Cam signal,
Ignition switch wiring (the Ignition switch input controls the Main Relay output), injector and
coil destinations. Official documentation for these vehicles was not offered in English, so it
would be very wise to double-check the pinout destinations for these circuits. This is
especially true if the vehicle contains a ‘swapped’ engine or if the wiring harness has been
cut, spliced, soldered, tapped or modified in any manner. It is the user’s responsibility to
check that the wiring on the vehicle matches the pinout chart below. AEM will not be held
responsible for loss or damage that can occur if the EMS is installed in a vehicle in which
the wiring harness does not match the AEM-supplied pinout chart!
The function of several pins have been changed from the original 30-1600 EMS, please
see the pinout chart for more info.
Primary Load Sensor, EMS Fuel Strategy
The factory MAF (mass air flow) sensor(s) can be removed to help decrease intake air
restriction; the EMS can be configured to use a MAP sensor to determine engine load.
It is recommended to use a 3.5 bar MAP sensor or higher (P/N 30-2130-50).
The factory Mass Air Flow sensor can be used as the primary load input for the AEM EMS
if desired. Please check the Notes section of each calibration for more info about the
vehicle setup and fuel strategy that calibration was configured to use.
EMS Fuel Map, Boost Fuel Trim Table
Some of the 30-6600 maps provided utilize the “Boost Fuel Trim Table” to provide a 1:1
fuel compensation above and below atmospheric pressure. In the startup calibration, the
“Boost Fuel Trim Table” is configured to provide twice as much fuel when the manifold
pressure is twice as high and half the fuel when the manifold pressure is half as high; this
should help simplify the tuning process for different vacuum and boost levels. Notice the
values in the main “Fuel Map” do not change above 100 kPa (0 psi boost), the fuel
correction is being made by the “Boost Fuel Trim Table.”
Note: the “Boost Fuel Trim Table” must be adjusted if a different MAP sensor is installed or
if the Load breakpoints are adjusted. The Boost Fuel Trim value should be set to -90 at
10kPa, 0 at 100 kPa, +100 at 200 kPa, +200 at 300 kPa, etc…
Peak and Hold Injector Drivers
Injectors 1-4 include Peak (4 amps) and Hold (1 amp) injector drivers. These drivers may
be used with peak and hold or saturated type injectors. Some factory wiring harnesses
may contain a resistor pack to prevent excessive current when using low-impedance
injectors with the stock ECU. With the 30-6600 installed, users can elect to remove and
bypass the OEM resistor pack (if one was installed) for more precise control of low-
impedance injectors.
Please note that the injector response time will be different with and without the factory
injector resistor pack. If the OEM resistor pack has been removed and bypassed, please
use the correct battery offset wizard for your injectors. Most battery offset wizards will
specify
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