AEM 30-6601 Series 2 Plug Play EMS Installation Instructions

Installation Instructions for:

EMS P/N 30-6601

1991-1993 Silvia S13 SR20DET

1991-1995 Nissan 180SX SR20DET

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

,!

This product is legal in California for racing vehicles only and should

Note: Part number 30-6601 supersedes and replaces P/N 30-1601 and 30-1601U

1991-1993 Silvia S13 (SR20DET) 1601/1601U 6601

1991-1995 Nissan 180SX (SR20DET) 1601/1601U 6601

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!

never be used on public highways.

Vehicle Series I EMS Series II EMS

ADVANCED ENGINE MANAGEMENT INC.

2205 126

© 2010 Advanced Engine Management, Inc.

th

Street Unit A Hawthorne, CA. 90250

Phone: [phone] Fax: [phone]

http://www.aempower.com

Instruction Part Number: 10-6601

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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.

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) Change Cam/Crank Angle Sensor: AEM trigger disc MUST be used

On Nissans, 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 30-6601 EMS which fits SR20DET cam angle
sensors. Please consult the following instructions supplement, which will be installed to
the C:\Program Files\AEM\AEMTuner\Instructions folder:
‘10-6600-C for EMS - 30-66XX supplement- CAS trigger install KA, GA, and SR
engines.PDF’

3) Remove the Stock Engine Control Unit

a) Access the stock Engine Control Unit (ECU). The location of the ECU on the

180SX, Silvia, and 240SX vehicles is behind the kick-panel on the passenger side
of the vehicle.

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.

4) 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 to 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 99.0%, this is considered a sensor error and may
cause some functions including idle feedback and acceleration fuel to operate
incorrectly.

5) Wiring accessories to the EMS:

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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.

AEM UEGO

P/N: 30-5130

AEM EMS

P/N: 30-6600

O2 Sensor 1

19

Sensor Ground

29

+5V Sensor Power

37

MAP Signal

35

Sensor Ground

29

IAT Sensor

26

Sensor Ground

29

Switched Input

41

White (0-5V Analog + signal)

Brown (Analog - signal)

Red (+5V Sensor Power)

Green (MAP Signal)

Black (Sensor Ground)

Switch 6

Pink (Switched +12V Power)

Red (+12V power, 5A fuse)

Black (Battery or chassis ground)

MAP Sensor

P/N: 30-2130-50

Air Temperature Sensor

P/N: 30-2010

Ground

6) 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.

Crankshaft timing marks are not labeled for some vehicles. Consult the factory
service manual for more information. The diagram below shows labels for the S13
and S14 SR20DET:

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