AEM Series 2 Plug Play EMS 306053 User Manual

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Installation Instructions for: 
EMS P/N 30-6053 
 
Fits vehicles: 
2006-2008 Honda S2000 AP2 F22C1 
 
 
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. 
 
Vehicle fitment  Series II EMS 
2006-2008 Honda S2000 AP2 F22C1  30-6053 
 
 
 
 
 
 
© 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: 10-6053  
						

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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 each particular application. The AEM 
EMS differs from all others in several ways. The EMS is a stand alone system which 
replaces the fuel and ignition functions of 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.  
 
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\Honda - Acura\  
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. 
• Sufficient battery voltage during cranking (starting) 
Having enough battery voltage when you crank over your vehicle is critical to the 
operation of your vehicle and your AEM EMS. For the EMS to function properly, the 
battery voltage must remain at or above 8 Volts when the vehicle is first starting. This 
is the time when your electrical system will be worked its hardest and be at its lowest 
voltage. If you are connected to your Series 2 EMS with a USB communications 
cable, and you experience disconnecting while the vehicle is cranking, the reason is 
most likely a battery voltage of less than 8 volts (see Channel called “Battery Raw” 
which is an unfiltered value of actual battery voltage being received by the EMS). If 
this is the case, you can confirm this by connecting with a serial cable (a serial 
adapter may be required if your computer is not equipped with a serial port) and 
check in the AEMTuner software for a Channel called “Run Time” as well as the 
“Battery Raw” to see at what voltage the EMS cuts out at. “Run Time” is the amount of 
time, in seconds, that the EMS has been turned on for. If you notice that this Channel 
resets to zero while the EMS is communicating with the computer and the vehicle is 
being cranked, that means the EMS has had lower than 8 Volts at some point and has 
reset the system. A thorough wiring check may reveal a large voltage drop causing 
this problem, or it may simply be the need for a new or a larger battery. 
  
• AEM adapter harness 
The 2006-2008 Honda S2000 uses an electronically controlled throttle which will 
remain controlled by the original ECU. The adapter harness provided will allow the 
user to retain the original electronically controlled throttle while still being able to 
control all other engine management aspects that you have come to expect from 
AEM. In addition, the stock instrument cluster, air conditioning, and emissions controls 
will continue to work as normal controlled by the original Honda ECU. 
 
• Vehicle speed sensor 
Currently, the speed sensor is the only circuit that causes a check engine light. This 
will not affect the function of the electronically controlled throttle. 
 
• Engine Wiring Harnesses, ‘swapped’ engine installations 
It would be very wise to double-check that the pinout destinations for the circuits is 
accurate to the provided documentation. 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 in this document. 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!  
 
• Retaining original O2 sensor 
For the malfunction code for this sensor to remain off, the stock oxygen sensor must 
be retained. However, when the air-fuel ratio is too rich with this sensor, in the case of 
a turbo application, the check engine light will still come on. This will not have any 
affect on the operation of the car including the electronically controlled throttle. 
 
• Knock sensor 
In the AEM wiring harness, the stock knock sensor has been tapped rather than 
intercepted to keep the stock ECU from thinking it has a malfunction. The knock 
sensor is less sensitive but still functional and the calibration for the sensor is lower by 
0.3 Volts in the AEMTuner calibration. If you would like the knock sensor to be more  
						

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sensitive, you can depin Pin A1 that goes into the stock ECU, but the malfunction 
code for this sensor will turn on. If this is done, the knock sensor calibration will need 
to have 0.3 Volts added to each breakpoint in the calibration. 
 
• Traction control function 
When active, the stock traction control system will be affected by adding the EMS. 
The stock traction control system uses throttle, fuel, and ignition changes for the 
traction control system. Since the fuel and ignition are no longer controlled by the 
stock ECU, these aspects of traction control must now be configured in the calibration 
in the EMS. The throttle will still be cut as normal, but the traction and stability control 
warning lights will stay on after the system is no longer activated and will reset when 
the vehicle is turned off.  
 
• EMS Fuel Map, Boost Fuel Trim Table 
The 30-6053 calibration maps provided utilize the “Boost Fuel Trim Table” to provide 
a 1:1 fuel compensation above atmospheric pressure. However, since the calibration 
was created on a naturally aspirated vehicle (A calibration is provided above 100 kPa) 
it has not been tested in boost and must be tuned to your application if turbo or 
supercharged. To use this table, the “Boost Fuel Trim Table” should be 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… 
 
• Wiring accessories to the EMS 
Please follow this suggested wiring diagram when adding new accessories and 
retaining original accessories such as UEGO gauges, MAP sensors, MAF 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 (tapped)
Sensor Ground (tapped) IAT SensorSensor Ground (tapped) MAP SignalSensor Ground (tapped) O2 Sensor 1
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
+5V Sensor Power (tapped)
MAF Signal
Sensor Ground (tapped)MAF Signal
Black (Sensor Ground) Red (+5V Sensor Power)
MAF Sensor
AEM EMS P/N: 30-6053
C16
A7, A31, C7, C18, or D9
Switch 1
Switched Input
Ground A7, A31, C7, C18, or D9
A7, A31, C7, C18, or D9
A7, A31, C7, C18, or D9C19 or C28
C17
C19 or C28
A29
C25
A31  
						

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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 found at www.aemelectronics.com  
Series 2 units are not supported by the older AEMPro tuning software.  
 
2)  Connect AEM adapter harness 
a)  Disconnect negative terminal from battery 
b)  Access the stock Engine Control Unit (ECU). The location of the ECU on the Honda 
S2000 is behind the left side driver’s side kick panel. 
 
Honda S2000 
c)  Remove kick panel that covers the original ECU and the plastic cover on the lower 
driver’s side door sill. The door sill cover is held in with plastic clips as shown 
below. 
 
    
    Remove sill cover        Clips holding sill cover 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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d)  
Remove the clip that is hidden underneath the rubber sealing trim next to the 
dashboard and the clip for the plastic cover over the stock ECU using a plastic pry 
tool to avoid scratching the paint and plastic cover. 
 
  
Remove clip     Remove clip 
 
e)  
Remove the carpeting that runs along the lower driver’s side door sill to place the 
wiring harness provided. Next, remove the two screws holding the plastic cover 
behind the driver’s seat to place the EMS in the area behind the seat. 
 
  
Remove carpet covering harness   Remove screw holding plastic cover 
 
f)  
Tap pin 3 on the red/blue TPS wire on the stock wiring harness using the provided 
wire-tap. It is located on the white 6-pin connector near the stock ECU shown 
below. 
 
Tap pin 3 (red/blue wire) on 6-pin connector  
						

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g)  
How to use provided wire taps: 
   
Run harness TPS wire through   Place vehicle wire in tap 
   
Screw in tap onto vehicle wire  Place harness TPS wire as shown 
 
Screw TPS wire into tap 
 
h)  
Carefully disconnect the wiring harness from the ECU. Avoid excessive stress or 
pulling on the wires, as this may damage the wiring harness. All connectors must 
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. Next to the stock ECU 
on the stock wiring harness, the A and B connectors should be routed underneath 
the D and E connectors to make them easier to install. 
 
 
  
Carefully remove ECU connectors    Reroute connectors 
A B 
D
E 
						

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i)   
Connect provided adapter harness to factory wiring harness and stock ECU. Then 
route the harness from the stock ECU through the driver’s side door sill and 
underneath the driver’s side seat. Take note of the bends that the harness will 
require so that the plastic cover that protects the harness will fit over the AEM 
wiring harness. A few zip ties will hold the harness against the stock ECU so that 
the clutch pedal will not contact it. See photo above to get an idea of the stock 
clearance of the ECU and clutch pedal. 
 
    
Plug in adapter harness to stock wiring Plug in adapter harness to stock ECU 
 
j)  
Mount the AEM EMS behind the seat in the upright position to maximize seat 
adjustment using the Velcro strips provided. Make sure the EMS is not impacted 
by the seat when moving it back into place. 
 
 
EMS location 
k) 
Reinstall the covers in the reverse of removal. Make sure that the cover that goes 
over the original ECU and now the adapter harness fits so that it is not contacting 
the clutch pedal. 
 
 
 
 
 
 
 
 
  
						

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2)  Repin ECU pins (only necessary if adding or relocating ECU pins) 
a) Locate a small screwdriver (a precision 1.5mm wide flathead screwdriver is 
recommended) and carefully pry white plastic retainer using both slots in the retainer 
so it disengages vertically about 1mm as shown in the following pictures: 
 
        Screwdriver lifts here       Plastic retaining mechanism after lifting 
b)    Next remove the metal pin from the plastic connector by lightly prying on the plastic 
tabs that secure the metal pin in the plastic connector while pulling on the wire at the 
same time as shown below.  
Pry this tab up to release the pin          While prying tab up, gently pull pin back 
 
3)  Install the AEM Engine Management System 
a)  Plug the provided wiring harness into the AEM EMS and position it so the wires are 
not pulled tight or stressed in any manner.  
b)  Secure the EMS with the provided Velcro fasteners behind driver’s side seat.  
c)  Reconnect the negative battery terminal. 
d)  Plug the communications cable into the EMS and into your PC. 
e)  Turn the ignition on, but do not attempt to start the engine.  
f)  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). 
g)  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\Honda - Acura   
						

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h)  NOTE: the throttle range on this vehicle is set differently from other EMS applications! 
Disconnect the DBW connector on the throttle, then perform the procedure as follows 
by holding the throttle open and closed manually at the throttle plate. 
Set the throttle range: Select Wizards>>Set Throttle Range. When finished, check 
that the ‘Throttle’ channel never indicates less than 3.2% or greater than 99.8% (must 
be 2.2% or more since the DBW throttle will close slightly when the engine starts), 
this is considered a sensor error and may cause some functions including idle 
feedback and acceleration fuel to operate incorrectly. Since this application uses the 
original drive-by-wire system, it is highly recommended that after calibration is 
complete, the throttle is rechecked to ensure that the minimum throttle never causes 
the Error Throttle channel to turn on. This would happen when the vehicle is off and 
the key is turned on. 
 
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 (10 degrees BTDC for instance). 
Remove the cylinder 1 ignition coil (closest to front of engine), add a spark plug wire 
between the ignition coil and the spark plug and place the timing light pickup on the 
added spark plug wire. Use a timing light to 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 original 
timing marks. “A” points to the timing indicator and “B” points to the red mark that is 
located 5° before top dead center.