AEM Series 2 Plug Play EMS 306610 User Manual

							  
 
 
© 2010 Advanced Engine Management, Inc. 
ADVANCED ENGINE MANAGEMENT INC. 
2205 126
th Street Unit A    Hawthorne, CA. 90250 
Phone: (310) 484-2322 Fax: (310) 484-0152 
http://www.aempower.com 
Instruction Part Number: 10-6610 
  
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Installation Instructions for: 
EMS P/N 30-6610 
95 Nissan 240SX S14 KA24DE (OBDI) 
95-97 Nissan Sentra and 200SX B14 SR20DE & GA16DE (Except 97 1.6L) 
95-96 Nissan Altima U13 KA24DE (Except 96 CA models) 
94-96 Infiniti G20 P10 SR20DE 
 
WARNING:
 
,! 
This installation is not for the tuning novice nor the PC illiterate! 
Use this system with EXTREME
 caution! The AEM EMS System 
allows for total flexibility in engine tuning. Misuse of this 
product can destroy your engine! If you are not well versed in 
engine dynamics and the tuning of management systems or are 
not PC literate, please do not attempt the installation. Refer the 
installation to a AEM trained tuning shop or call 800-423-0046 
for technical assistance. You should also visit the AEM EMS 
Tech Forum at http://www.aempower.com 
 
NOTE: AEM holds no responsibility for any engine damage that 
results from the misuse of this product!
 
 
This product is legal in California for racing vehicles only and should never 
be used on public highways. 
 
Note: Part number 30-6610 supercedes and replaces p/n 30-1610 and 30-1610U 
 
Vehicle  Series I EMS  Series II EMS 
1995 Nissan 240SX S14 KA24DE (OBDI)  1610/U  6610 
1995-1997 Nissan Sentra B14 SR20DE/GA16DE (x/c ‘97 1.6L)  1610/U  6610 
1995-1997 200SX B14 SR20DE/GA16DE(x/c ‘97 1.6L)  1610/U  6610 
1995-1996 Nissan Altima U13 KA24DE (x/c ’96 CA models)  1610/U  6610 
1994-1996 Infiniti G20 P10 SR20DE  1610/U  6610  
						

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Thank you for purchasing an AEM Engine Management System.  
 
The AEM Engine Management System (EMS) is the result of extensive development on a 
wide variety of cars. Each system is engineered for the particular application. The AEM 
EMS differs from all others in several ways. The EMS is a stand alone system, which 
completely replaces the factory ECU and features unique Plug and Play Technology, 
which means that each system is configured especially for your make and model of car 
without any jumper harnesses. There is no need to modify your factory wiring harness and 
in most cases your car may be returned to stock in a matter of minutes.  
 
For stock and slightly modified vehicles, the supplied startup calibrations are configured to 
work with OEM sensors, providing a solid starting point for beginner tuning. For more 
heavily modified cars, the EMS can be reconfigured to utilize aftermarket sensors and has 
many spare inputs and outputs allowing the elimination of add-on rev-limiters, boost 
controllers, nitrous controllers, fuel computers, etc. It also includes a configurable onboard 
1MB data logger that can record any 16 EMS parameters at up to 250 samples per 
second. Every EMS comes with all functions installed and activated; there is no need to 
purchase options or upgrades to unlock the full potential of your unit. 
 
The installation of the AEM EMS on the supported vehicles uses the stock sensors and 
actuators. After installing the AEMTuner software, the startup calibration will be saved to 
the following folder on your PC:  
C:\Program Files\AEM\AEMTuner\Calibrations\Nissan\  
Multiple calibrations may be supplied for each EMS; additional details of the test vehicle 
used to generate each calibration can be found in the Calibration Notes section for that 
file.  
 
Please visit the AEM Performance Electronics Forum at http://www.aempower.com and 
register.  We always post the most current strategy release, PC Software and startup 
calibrations online. On the forum, you can find and share many helpful hints/tips to make 
your EMS perform its best.  
 
 
TUNING NOTES AND WARNING:
  
While the supplied startup calibration may be a good starting point and can save 
considerable time and money, it will not replace the need to tune the EMS for your specific 
application. AEM startup calibrations are not intended to be driven aggressively before 
tuning. We strongly recommend that every EMS be tuned by someone who is already 
familiar with the AEM software and has successfully tuned vehicles using an AEM EMS. 
Most people make mistakes as part of the learning process; be warned that using your 
vehicle as a learning platform can damage your engine, your vehicle, and your EMS. 
  
						

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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  
						

							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  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 49Sensor 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. 
 
  
						

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3)  Install the AEM Engine Management System 
a) Plug the factory wiring harness into the AEM EMS and position it so the wires are 
not pulled tight or stressed in any manner. Secure the EMS with the provided 
Velcro fasteners. 
b) Plug the comms cable into the EMS and into your PC. 
c) Turn the ignition on, but do not attempt to start the engine.  
d) At the time these instructions were written, new EMS units do not require USB 
drivers to be installed on the PC. 
e) With the AEMTuner software open, select ECU>>Upload Calibration to upload the 
startup calibration file (.cal) that most closely matches the vehicle’s configuration to 
be tuned. Check the Notes section of the calibration for more info about the vehicle 
it was configured for. These files can be found in the following folder:  
C:\Program Files\AEM\AEMTuner\Calibrations\Nissan  
f) Set the throttle range: Select Wizards>>Set Throttle Range and follow the on-
screen instructions. When finished, check that the ‘Throttle’ channel never indicates 
less than 0.2% or greater than 99.8%, this is considered a sensor error and may 
cause some functions including idle feedback and acceleration fuel to operate 
incorrectly.  
 
4)  Ready to begin tuning the vehicle. 
a) Before starting the engine, verify that the fuel pump runs for a couple of seconds 
when the key is turned on and there is sufficient pressure at the fuel rail.  
If a MAP sensor is installed, check that the Engine Load indicates something near 
atmospheric pressure (approximately 101kPa or 0 PSI at sea level) with the key on 
and engine off. Press the throttle and verify that the ‘Throttle’ channel responds but 
the Engine Load channel continues to measure atmospheric pressure correctly.  
b) Start the engine and make whatever adjustments may be needed to sustain a safe 
and reasonably smooth idle. Verify the ignition timing: Select Wizards>>Ignition 
Timing Sync from the pull-down menu.  Click the ‘Lock Ignition Timing’ checkbox 
and set the timing to a safe and convenient value (for instance, 10 degrees BTDC). 
Use a timing light and compare the physical timing numbers to the timing value you 
selected. Use the Sync Adjustment Increase/Decrease buttons to make the 
physical reading match the timing number you selected. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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Crankshaft timing marks are not labeled for some vehicles. Consult the factory 
service manual for more information. The diagram below shows labels for the 
240SX:  
 
 
 
c) Note: This calibration needs to be properly tuned before driving the vehicle. It is 
intended for racing vehicles and may not operate smoothly at idle or part-throttle. 
NEVER TUNE THE VEHICLE WHILE DRIVING
 
 
 
5) Troubleshooting an engine that will not start 
a) Double-check all the basics first… engines need air, fuel, compression, and a 
correctly-timed spark event. If any of these are lacking, we suggest checking simple 
things first. Depending on the symptoms, it may be best to inspect fuses, sufficient 
battery voltage, properly mated wiring connectors, spark using a timing light or by 
removing the spark plug, wiring continuity tests, measure ECU pinout voltages, 
replace recently-added or untested components with known-good spares. Check 
that all EMS sensor inputs measure realistic temperature and/or pressure values.  
b) If the EMS is not firing the coils or injectors at all, open the Start tab and look for the 
‘Stat Sync’d’ channel to turn ON when cranking. This indicates that the EMS has 
detected the expected cam and crank signals;  if Stat Sync’d does not turn on, 
monitor the Crank Tooth Period and T2PER channels which indicate the time 
between pulses on the Crank and T2 (Cam) signals. Both of these channels should 
respond when the engine is cranking, if either signal is not being detected or 
measuring an incorrect number of pulses per engine cycle the EMS will not fire the 
coils or injectors.  
						

							Page 7 of 14  c) 
If the Engine Load changes when the throttle is pressed this usually indicates that 
there is a problem with the MAP sensor wiring or software calibration (when the 
EMS detects that the MAP Volts are above or below the min/max limits it will run in 
a failsafe mode using the TPS-to-Load table to generate an artificial Engine Load 
signal using the Throttle input). This may allow the engine to sputter or start but not 
continue running properly.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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Application Notes for EMS P/N 30-6610 
KA24DE, GA16DE, SR20DE 
 
Make: Nissan/Infiniti   Spare Injector Drivers:  Inj 5, Pin 29 
Model:  240SX, Sentra, 200SX, Altima, G20    Spare Injector Drivers:  Inj 6, Pin 30 
Years Covered:  1994-1997    Spare Injector Drivers:  Inj 7, Pin 31 
Engine Displacement:  1.6L, 2.0L, 2.4L    Spare Injector Drivers:  Inj 8, Pin 32 
Engine Configuration:  Inline 4    Spare Injector Drivers:  Inj 9, Pin 116 
Firing Order:  1-3-4-2    Spare Injector Drivers:  Inj 10, Pin 117 
N/A, S/C or T/C:  N/A    Spare Coil Drivers:  Coil 2, Pin 58 
Load Sensor Type:  MAF    Spare Coil Drivers:  Coil 3, Pin 64 
MAP Min:  ---    Spare Coil Drivers:  Coil 4, Pin 36 
MAP Max:  ---    Spare Coil Drivers:  --- 
MAF Min:  0.47 Volts    Boost Solenoid:  PW2, Pin 34 
MAF Max:  4.98 Volts    EGT #1 Location:  Pin 62 
# Coils:  1 (Distributor)    EGT #2 Location:  Pin 65 
Ignition driver type:  0-5V Falling Edge trigger    EGT #3 Location:  Pin 2 
      EGT #4 Location:  Pin 67 
# of Injectors:  4 (Inj 1-4)   Spare 0-5V Channels:  MAP, Pin 66 
Factory Injectors:  185cc-250cc    Spare 0-5V Channels:  ADCR11, Pin 9 
Factory Inj Resistors:  No    Spare 0-5V Channels:  ADCR13, Pin 24 
Injection Mode:  Sequential    Spare 0-5V Channels:  ADCR14, Pin 7 
Knock Sensors used:  1    Spare 0-5V Channels:  Knock 2, Pin 68 
Lambda Sensors used:  1    Spare Low Side Driver:  LS1, Pin 115 
Idle Motor Type:  Pulse Width    Spare Low Side Driver:  LS2, Pin 37 & 57 
Main Relay Control:  No (hardware controlled)    Spare Low Side Driver:  LS4, Pin 108 
Crank Pickup Type:  Optical    Spare Low Side Driver:  LS8, Pin 114 
Crank Teeth/Cycle:  24 (AEM trigger disc)    Spare Low Side Driver:  LS9, Pin 110 
Cam Pickup Type:  Optical    Spare Low Side Driver:  LS12, Pin 105 
** Cam Teeth/Cycle:  1 (AEM trigger disc)    Check Engine Light:  LS10 , Pin 18 
Transmissions Offered:  Manual/Automatic    Spare High Side Driver:  HS1, Pin 11 
Trans Supported:  Manual    Spare Switch Input:  Switch 1, Pin 35 
Drive Options:  FWD, RWD    Spare Switch Input:  Switch 2, Pin 25 
Supplied Connectors:  N/A    Spare Switch Input:  Switch 3, Pin 60 
  Spare Switch Input:  Switch 4, Pin 22 
  Spare Switch Input:  Switch 5, Pin 27 
 
  A/C Switch Input:  Switch 6, Pin 21 
 
 
Wire View of AEM EMS 
 
 
WARNING:
      
*All switch input pins must connect to ground; the switch should not provide 12V power to 
the EMS because that will not be detected as on or off.   
						

							Page 9 of 14 
  
30-1610 (Series 1) vs 30-6610 (Series 2) EMS differences:
 
The EMS functions assigned to certain pins have been changed and no longer match the 
30-1610 EMS. Unless otherwise noted, the following pins and functions will need to be 
manually reconfigured after using AEMTuner to convert a V1.19 30-1610, Series 1 EMS 
calibration for use with the 30-6610 Series 2 hardware. 
 
Pin  Vehicle harness 
destination 30-1610 function 30-6610 function Notes 
12  A/C triple press sw  ---  CAN1L   
69 ---  Coil #5 CAN1H    
						

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Connection Diagram for EMS P/N 30-6610 
PnP Means the Plug and Play system comes with this configured for proper operation of this 
device. Is still available for reassignment by the end user. 
Available  Means the function is not currently allocated and is available for use 
Dedicated  Means the location is fixed and cannot be changed 
 
Pin  
1995 Nissan 240SX S14 KA24DE (OBDI) 1995-1997 Nissan Sentra B14 SR20DE/GA16DE (x/c ’97 1.6L) 1995-1997 200SX B14 SR20DE/GA16DE (x/c ’97 1.6L) 1995-1996 Nissan Altima U13 KA24DE (x/c ’96 CA models) 1994-1996 Infiniti G20 P10 SR20DE 
AEM EMS 30-6610 I/O Notes 
1 Ignition Signal  Coil 1  Output PnP for Coil 1, 0-5V falling edge trigger 
2 Ignition Check  EGT 3  Input Available, Jumper set for 0-5V input 
3 Tachometer Tachometer (LS7) Output PnP for Tachometer 
4 ECCS Self-Shutoff Relay Main Relay Output Dedicated, EMS activates relay with switched GND 
5 --- Idle 4 Output Available, Ground/+12V, 1.5A max 
6 --- Idle 3 Output Available, Ground/+12V, 1.5A max 
7 M/T 5th position switch (240SX & Altima Only)  ADCR14  Input Available, 0-5V Input 
8 Fuel Pump Relay  Low Side 11  Output PnP for Fuel Pump 
9 A/C Triple Pressure Switch (Altima & G20)/  
A/C Hand Power Switch (240SX) ADCR11 Input Available, 0-5V Input 
10 ECCS Ground  Power Ground  Input Dedicated 
11 ---  High Side 1  Output Available, +12V, 1.5A Max 
12 A/C Triple-Pressure Switch (240SX, Sentra, 200SX Only)  CAN1L  Output Dedicated, CAN1 low side 
13 Cooling Fan High Relay (240SX & Altima Only)  Low Side 5  Output PnP for Cooling Fan 
14 Cooling Fan Low Relay  Low Side 3  Output PnP for Cooling Fan 
15 Air Conditioner Relay  Low Side 6  Output PnP for A/C Compressor 
16 --- Idle 2 Output Available, Ground/+12V, 1.5A max 
17 --- Idle 1 Output Available, Ground/+12V, 1.5A max 
18 Malfunction Indicator Light  Low Side 10  Output Available, Switched ground, 1.5A max 
19 ECCS Ground  Power Ground  Input Dedicated 
 
Wire View of AEM EMS