AEM 30-6610 Series 2 Plug & Play EMS - Manual (Page 3)

Page 3 of 14
Read and understand these instructions BEFORE attempting to install this product.
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 30-1610 EMS, please
see the pinout chart for more info.
**Cam / Crank Angle Sensor: AEM trigger disc MUST be used
Discrepancies have been observed in the OEM cam/crank angle signals between model
years and/or trim levels; to avoid confusion the Series 2 EMS does not support the OEM
Nissan trigger pattern. A replacement trigger disc is now included with every Nissan EMS
and must be installed before attempting to start the engine. An AEM trigger disc is
supplied with each 30-6610 EMS which fits KA, GA, and SR sensors. Please consult the
following instructions supplement, which will be installed to the C:\Program
Files\AEM\AEMTuner\Instructions folder:
‘10-6610-A for EMS - 30-661X supplement- CAS trigger install KA, GA, and SR
engines.PDF’
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 (the EMS will only use one MAF sensor for fuel calculations even if the vehicle is
equipped with two). 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
The 30-6610 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. The factory Nissan wiring harness
may contain a resistor pack to prevent excessive current when using low-impedance