AEM 30-6610 Series 2 Plug & Play EMS - Manual (Page 4)

Page 4 of 14
injectors with the stock ECU. With the 30-6610 installed, users can elect to remove and
bypass the OEM resistor pack 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 <P&H DRIVER> if they are intended for use without a resistor pack.
Wiring accessories to the EMS:
Please follow this suggested wiring diagram when adding accessories such as UEGO
gauges, MAP sensors, IAT sensors, or switches for use with the EMS. Note that wire
polarity is not important for the Air Temperature sensor.
+5V Sensor Power
Switched Input
Sensor Ground
IAT Sensor
50
28
AEM EMS
P/N: 30-6610
Sensor Ground
MAP Signal
66
50
49
Sensor Ground
O2 Sensor 1
46
50
Ground
Air Temperature Sensor
P/N: 30-2010
Black (Sensor Ground)
Green (MAP Signal)
Red (+5V Sensor Power)
Black (Battery or chassis ground)
Red (+12V power, 5A fuse)
AEM UEGO
P/N: 30-5130
Brown (Analog - signal)
White (0-5V Analog + signal)
Pink (Switched +12V Power)
MAP Sensor
P/N: 30-2130-50
35
Switch 1
1) Install AEMTuner software onto your PC
The latest version of the AEMTuner software can be downloaded from the AEMTuner
section of the AEM Performance Electronics forums. Series 2 units are not supported
by the older AEMPro tuning software.
2) Remove the Stock Engine Control Unit
a) Access the stock Engine Control Unit (ECU). The location of the ECU on the Nissan
240SX vehicles is behind the kick-panel on the passenger side of the vehicle. All
other Nissan/Infiniti control units are located on the floor behind the center console
accessed from the passenger side.
b) Carefully disconnect the wiring harness from the ECU. Avoid excessive stress or
pulling on the wires, as this may damage the wiring harness. Some factory ECUs
use a bolt to retain the factory connectors, and it must be removed before the
harness can be disconnected. There may be more than one connector, and they
must all be removed without damage to work properly with the AEM ECU. Do not
cut any of the wires in the factory wiring harness to remove them.
c) Remove the fasteners securing the ECU to the car body, and set them aside. Do
not destroy or discard the factory ECU, as it can be reinstalled easily for street use
and troubleshooting.