AEM Series 2 Plug Play EMS 306611 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: 10-6611 
  
Page 1 of 13 
 
Installation Instructions for: 
EMS P/N 30-6611 
 
Vehicle: 
1996-1998 Nissan 240SX S14 KA24DE 
1997-1999 Nissan Sentra B14 SR20DE & GA16DE (Except 97 2.0L) 
1997-1998 Nissan 200SX B14 SR20DE & GA16DE (Except 97 2.0L) 
1996-1999 Nissan Altima U13 KA24DE (Except 96 Non CA models) 
1999 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://forum.aempower.com/forum/index.php
 
 
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 30-6611 supersedes and replaces p/n 30-1611 and 30-1611U 
 
Vehicle Series I EMS Series II EMS 
1996-1998 Nissan 240SX S14 KA24DE (OBDII)  1611/U  6611 
1997-1999 Nissan Sentra B14 SR20DE/GA16DE (x/c ‘97 2.0L)  1611/U  6611 
1997-1998 200SX B14 SR20DE/GA16DE (x/c ‘97 2.0L)  1611/U  6611 
1996-1999 Nissan Altima U13 KA24DE (x/c ’96 Non CA models)  1611/U  6611 
1999 Infiniti G20 P10 SR20DE  1611/U  6611  
						

							Page 2 of 13 
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 your 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. This 
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\  
 
If your vehicle is not listed, it may have a calibration which can be found on AEM’s user 
discussion forum: http://forum.aempower.com/forum/index.php
 
Multiple calibrations may be supplied for each EMS and additional details of the test 
vehicle used to generate each calibration can be found in the Calibration Notes section for 
that file.  
 
We always post the most current strategy release, PC Software, and startup calibrations 
on the forum where you can also find and share many helpful hints/tips to make your EMS 
perform at 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. 
 
The function of several pins have been changed from the original 30-1611 EMS, please 
see the pinout chart for more info. 
 
 
 
 
  
						

							Page 3 of 13 
Read and understand these instructions BEFORE attempting to install this product. 
 
**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 30-6611 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. 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 30-6611 maps provided utilize the “Boost Fuel Trim Table” to provide a 1:1 fuel 
compensation above 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; this should help simplify the tuning process for different 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 
injectors with the stock ECU. With the 30-6611 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.  
 
 
 
 
 
 
 
  
						

							Page 4 of 13 
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.   
 
3550 63 AEM EMS 
P/N: 30-6611
66
50 49 46
50Switched Input
Ground
Switch 1
Sensor Ground (tapped)Air Temperature Sensor 
P/N: 30-2010 IAT Sensor
O2 Sensor 1
+5V Sensor Power (tapped)
Sensor Ground (tapped) MAP SignalSensor Ground (tapped)
MAP Sensor 
P/N: 30-2130-50 Black (Battery or chassis ground)Red (+12V power, 5A fuse)Pink (Switched +12V Power)
White (0-5V Analog + signal)
Brown (Analog - signal)
Black (Sensor Ground)Green (MAP Signal) Red (+5V Sensor Power)
AEM UEGO 
P/N: 30-5130
 
 
30-1611 (Series 1) vs 30-6611 (Series 2) EMS differences:
 
The EMS functions assigned to certain pins have been changed and no longer match the 
30-1611 EMS. Unless otherwise noted, the following pins and functions will need to be 
manually reconfigured after using AEMTuner to convert a V1.19 30-1611, Series 1 EMS 
calibration for use with the 30-6611 Series 2 hardware. 
 
Pin  Vehicle harness 
destination 30-1611 function 30-6611 function Notes 
12  A/C triple press sw  ---  CAN1L  Changed to CAN low side 
69  ---  Coil #5  CAN1H  Changed to CAN high side 
 
 
 
 
 
 
 
 
 
 
  
						

							Page 5 of 13 
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) Disconnect the negative terminal from battery 
b) 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. 
c) 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.  
d) 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. 
 
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) Reconnect the negative battery terminal. 
c) Plug the communications cable into the EMS and into your PC. 
d) Turn the ignition on, but do not attempt to start the engine.  
e) Connect the USB cable to the EMS and a computer. (Note: At the time these 
instructions were written, new EMS units do not require USB drivers to be installed 
on the PC. The EMS will automatically be detected as a human interface device 
(HID).) 
f) 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  
g) 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.  
  
						

							Page 6 of 13  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. 
 
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.  
  
						

							Page 7 of 13  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. 
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.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

							Page 8 of 13 
Application Notes for EMS P/N 30-6611 
KA24DE, GA16DE, SR20DE 
 
Make: 
Nissan/Infiniti   Description 
Function  ECU Pin # 
Model: 
240SX, Sentra, 200SX, Altima, G20    Spare Injector Drivers: 
Injector 5  29 
Years Covered: 
1996-1999    Spare Injector Drivers: 
Injector 6  30 
Engine Displacement: 
1.6L, 2.0L, 2.4L    Spare Injector Drivers: 
Injector 7  31 
Engine Configuration: 
Inline 4    Spare Injector Drivers: 
Injector 8  32 
Firing Order: 
1-3-4-2    Spare Injector Drivers: 
Injector 9  116 
N/A, S/C or T/C: 
N/A    Spare Injector Drivers: 
Injector 10  117 
Load Sensor Type: 
MAF or MAP    Spare Coil Drivers: 
Coil 2  58 
MAP Min: 
0.5 Volts    Spare Coil Drivers: 
Coil 3  64 
MAP Max: 
4.5 Volts    Spare Coil Drivers: 
Coil 4  36 
MAF Min: 
0.47 Volts    Boost Solenoid: 
PW 2  34 
MAF Max: 
4.98 Volts    EGT 1 Location: 
EGT 1  62 
# Coils: 
1 (Distributor)    EGT 2 Location: 
EGT 2  65 
Ignition driver type: 
0-5V Falling Edge trigger    EGT 3 Location: 
EGT 3  2 
# of Injectors: 
4 (Inj 1-4)    EGT 4 Location: 
EGT 4  67 
Factory Injectors: 
185cc-250cc saturated    Spare 0-5V Channel: 
MAP 66 
Factory Inj Resistors: 
No    Spare 0-5V Channel: 
ADCR11 9 
Injection Mode: 
Sequential    Spare 0-5V Channel: 
ADCR13 24 
Knock Sensors used: 
1    Spare 0-5V Channel: 
ADCR14 7 
  
Spare 0-5V Channel:  Knock 2  68 Lambda Sensors used: 1 (O2 # 1, wideband sensor required, original 
O2 sensor not supported) 
   Spare Low Side Driver: 
Low side 1  115 
Idle Motor Type: 
Pulse Width    Spare Low Side Driver: 
Low side 2   37 & 57 
Main Relay Control: 
No (hardware controlled)    Spare Low Side Driver: 
Low side 4  108 
Crank Pickup Type: 
Optical    Spare Low Side Driver: 
Low side 8  114 
Crank Teeth/Cycle: 
24 (AEM trigger disc)    Spare Low Side Driver: 
Low side 9  110 
Cam Pickup Type: 
Optical    Spare Low Side Driver: 
Low side 12  105 
** Cam Teeth/Cycle: 
1 (AEM trigger disc)    Check Engine Light: 
Low side 10  18 
Transmissions Offered: 
Manual/Automatic    Spare High Side Driver: 
High side 1  11 
Trans Supported: 
Manual    Spare Switch Input: 
Switch 1  35 
Drive Options: 
FWD, RWD    Spare Switch Input: 
Switch 2  25 
Supplied Connectors: 
N/A    Spare Switch Input: 
Switch 3  60 
         Spare Switch Input: 
Switch 4  22 
         Spare Switch Input: 
Switch 5  27 
         A/C Switch Input: 
Switch 6  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 13 
 Connection Diagram for EMS P/N 30-6611 
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 
Not used  Means that the AEM EMS does not use this pin location for this application 
 
Pin  
1996-1998 Nissan 240SX S14 KA24DE (OBDII) 1997-1999 Nissan Sentra B14 SR20DE & GA16DE (Except 97 2.0L) 1997-1998 Nissan 200SX B14 SR20DE & GA16DE (Except 97 2.0L) 1996-1999 Nissan Altima U13 KA24DE (Except 96 Non CA models) 1999 Infiniti G20 P10 SR20DE 
AEM EMS 30-6611 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 EVAP Purge Control Valve  Idle 4  Output Available, switched +12V, 1.5A max 
6 EVAP Purge Control Valve (Except Altima)  Idle 3  Output Available, switched ground, 1.5A max 
7 M/T 5th position switch (240SX Only)  ADCR14  Input Available, 0-5V sensor 
8 Fuel Pump Relay  Low Side 11  Output PnP for fuel pump 
9 A/C Triple Pressure Switch (240SX & Altima Only)  ADCR11  Input Available, 0-5V Input 
10 ECCS Ground  Power Ground  Input Dedicated, ground for EMS 
11 ---  High Side 1  Output Available, switched +12V, 1.5A Max 
12 A/C Triple-Pressure Switch (95-96 240SX 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 air conditioner compressor relay activation 
16 EVAP Purge Control Valve (Except Altima)  Idle 2  Output Available, switched +12V, 1.5A max 
17 EVAP Purge Control Valve (Except Altima)  Idle 1  Output Available, switched ground, 1.5A max 
18 Malfunction Indicator Light  Low Side 10  Output Available, switched ground, 1.5A max 
19 ECCS Ground  Power Ground  Input Dedicated, ground for EMS 
 
Wire View of AEM EMS 
 
 
 
 
 
 
 
 
 
  
						

							Page 10 of 13 
 
Connection Diagram for EMS P/N 30-6611 
Pin  
1996-1998 Nissan 240SX S14 KA24DE (OBDII) 1997-1999 Nissan Sentra B14 SR20DE & GA16DE (Except 97 2.0L) 1997-1998 Nissan 200SX B14 SR20DE & GA16DE (Except 97 2.0L) 1996-1999 Nissan Altima U13 KA24DE (Except 96 Non CA models) 1999 Infiniti G20 P10 SR20DE 
AEM EMS 30-6611 I/O Notes 
20 Start Signal  Start  Input Dedicated, start signal 
21 Air Conditioner Switch  Switch 6  Input PnP for air conditioning switch 
22 M/T Neutral Position Switch  Switch 4  Input Available, switched input 
23 Throttle Position Sensor  TPS  Input Dedicated, throttle position sensor 
24 Blower Fan Switch (97-99 1.6L Only)  ADCR13  Input Available, 0-5V input 
25 Power Steering Oil Pressure Switch  Switch 2  Input Available, switched input 
26 Vehicle Speed Sensor Vehicle 
Speed (T3) Input PnP for vehicle speed  
27 Throttle Closed Switch  Switch 5  Input Available, switched input 
28 Intake Air Temperature Sensor  IAT  Input PnP for intake air temperature 
29 A/T Signal 2  Injector 5  Output Available, switched ground, 1.5A max 
30 A/T Signal 3  Injector 6  Output Available, switched ground, 1.5A max 
31 --- Injector 7 Output Available, switched ground, 1.5A max 
32 --- Injector 8 Output Available, switched ground, 1.5A max 
33 A/T Signal 4 (Throttle Position Signal)  Idle 6  Output Available, switched ground, 1.5A max 
34 --- PW 2 Output Available, pulse width out 
35 --- Switch 1 Input Available, switched input 
36 --- Coil 4 Output Available, coil 4, 0-5V falling edge trigger 
37 ---  Low Side 2  Output Available, switched ground, 1.5A max (connected to Pin 57) 
 
 
Wire View of AEM EMS