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: (310) 484-2322 Fax: (310) 484-0152
http://www.aempower.com
Instruction Part Number: 10-6601
Page 1 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 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.
Page 2 of 13
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:
Page 3 of 13
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:
Page 4 of 13
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
7) 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.
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 5 of 13
Application Notes for EMS P/N 30-6601
1991-1993 Silvia S13 SR20DET, 1991-1995 180SX SR20DET
Make: Nissan Spare Injector Drivers: Inj 5, Pin 23
Model: Silvia and 180SX Spare Injector Drivers: Inj 6, Pin 105
Years Covered: 1991-1995 Spare Injector Drivers: Inj 7, Pin 14
Engine Displacement: 2.0L Spare Injector Drivers: Inj 8, Pin 114
Engine Configuration: Inline 4
Firing Order: 1-3-4-2
N/A, S/C or T/C: Turbocharged
Load Sensor Type: 0-5V MAF Boost Solenoid: PW 2, Pin 111
EGT 1 Location: Pin 5
# Coils: 4 EGT 2 Location: Pin 15
Ignition driver type: 0-5V Falling Edge trigger EGT 3 Location: Pin 44
EGT 4 Location: Pin 115
Number of Injectors: 4 (P&H drivers: Inj 1-4) Spare 0-5V Channels: MAP, Pin 35
Factory Injectors: 370cc Saturated Spare 0-5V Channels: ADCR11, Pin 33
Factory Inj Resistors: No
Injection Mode: Sequential
Knock Sensors used: 1 Spare Low Side Driver: LS2, Pin 45
Lambda Sensors
used:
Idle Motor Type: Duty-controlled solenoid Spare Low Side Driver: LS5, Pin 10
Main Relay Control: Yes (not user programmable) Spare Low Side Driver: LS6, Pin 11
Crank Pickup Type: Optical
**Crank Teeth/Cycle: 24 (AEM trigger disc) Check Engine Light: LS10, Pin 24
Cam Pickup Type: Optical Spare High Side Driver: HS1, Pin 28
**Cam Teeth/Cycle: 1 (AEM trigger disc)
Transmissions
Offered:
Trans Supported: Manual
Drive Options: RWD Spare Switch Input: Switch 2, Pin 43
Supplied Connectors: N/A
AEM extension/patch
harness
A/C Switch Input: Switch 6, Pin 41
1 Spare Low Side Driver: LS4, Pin 102
Manual/Automatic
30-2995
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.
The function of several pins have been changed from the original 30-1601 EMS, please
see the pinout chart for more info.
Page 6 of 13
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 some 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!
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 30-6601 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 1-6 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 30-6601 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.
Page 7 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.
Page 8 of 13
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Connection Diagram for EMS P/N 30-6601
PnP These pins are used in the AEM-supplied startup calibration. They can be reconfigured by the end user.
Available Not used by the startup calibration. Modifications to the OEM wiring may be required before use.
Dedicated The function of these pins is fixed and must not be changed.
1991-1995 Nissan 180SX SR20DET,
1991-1993 Nissan Silvia S13 SR20DET
Ignition 1 Coil 1 Output PnP for Coil 1, 0-5V Falling Edge trigger
Ignition 2 Coil 2 Output
Tachometer Signal Low Side 7 Output PnP for Tachometer
ECCS Self-Shutoff Relay Main Relay (control) Output Dedicated, EMS activates relay with switched GND
Ignition pulse monitor EGT 1 Input Available, jumper set for 0-5V Input
ECCS Ground Power Ground Input Dedicated
Data Link Connector Coil 2 Output
Ignition 3 Coil 3 Output PnP for Coil 3
Ignition 4 Coil 4 Output PnP for Coil 4
--- Low Side 5 Output Available, Switched Ground, 1.5A max
--- Low Side 6 Output Available, Switched Ground, 1.5A max
A/T Signal No. 3 CAN1H Output Dedicated, CAN high side
ECCS Ground Power Ground Input Dedicated
Diagnostics Clock Injector 7 Output Available, Switched Ground, 1.5A Max
AEM EMS 30-6601 I/O Notes
PnP for Coil 2, 0-5V Falling Edge trigger,
connects to pin 7
PnP for Coil 2, 0-5V Falling Edge trigger,
connects to pin 2
Wire View of AEM EMS
Page 9 of 13
Pin
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Connection Diagram for EMS P/N 30-6601
1991-1995 Nissan 180SX SR20DET,
1991-1993 Nissan Silvia S13 SR20DET
Data Link Connector EGT 2 Input Available, jumper set for 0-5V Input
Mass Air Flow Sensor MAF Input PnP for MAF Sensor
Mass Air Flow Ground Power Ground Input Dedicated
ECT Sensor Coolant Input PnP for Coolant Temp Sensor
Oxygen Sensor O2 #1 Input Dedicated, 0-5V input signal
Throttle Position Sensor TPS Input PnP for Throttle Position Sensor
Sensor Ground Sensor Ground Output Dedicated, sensors only
Crankshaft Reference Signal Cam (T2) Input Dedicated, must use AEM replacement trigger disc.
Data Link Connector Injector 5 Output Available, Switched Ground, 1.5A Max
Malfunction Indicator Light Low Side 10 Output Available, Switched Ground, 1.5A Max
Exhaust Over Temp Warning Lamp Low Side 3 Output Available, Switched Ground, 1.5A Max
Exhaust Temperature sensor AIT Input
Knock Sensor Knock 1 Input PnP for Knock Sensor
A/T Signal No. 4 High Side 1 Output Available, Switched +12V, 1.5A Max
Sensor Ground Sensor Ground Output Dedicated, sensors only
Crankshaft Reference Signal Cam (T2) Input Dedicated, must use AEM replacement trigger disc.
AEM EMS 30-6601 I/O Notes
Available, Air Intake Temperature Sensor Input,
(2.2k pull-up resistor to 5V)
Wire View of AEM EMS
Connection Diagram for EMS P/N 30-6601
Page 10 of 13
Pin
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
1991-1995 Nissan 180SX SR20DET,
1991-1993 Nissan Silvia S13 SR20DET
Crankshaft Position Sensor Signal Crank Signal Input
Vehicle Speed T3 Input PnP for Vehicle Speed Sensor
--- ADCR11 Input Available, 0-5 Volt Input
Start Signal +12V Switched Input Dedicated
Neutral Position Switch MAP Input Available, Manifold Pressure sensor input
Ignition Switch Main Relay (input) Input Dedicated, +12V activates Main Relay circuit
Throttle Position Sensor Power +5V Sensor Output Dedicated
Power Supply for ECM +12V Switched Input Dedicated, gets +12V power when ECCS Relay is on
ECCS Ground Power Ground Input Dedicated
Crankshaft Position Signal Crank Signal Input
Air Conditioner Switch Switch 6 Input PnP for A/C Switch
A/T Signal No. 1 CAN1L Input Dedicated, CAN low side
Power Steering Oil Pressure Switch Switch 2 Input Available, Switched Input
A/T Signal No. 2 EGT 3 Input Available, jumper set for 0-5V Input
A/C FICD Low Side 2 Output Available, Switched Ground, 1.5A Max
Back-up Power Supply Permanent +12V Input Dedicated, used to store internal log data
Power Supply for ECM +12V Switched Input Dedicated, gets +12V power when ECCS Relay is on
ECCS Ground Power Ground Input Dedicated
Injector 1 Injector 1 Output PnP for Injector 1 (Peak & Hold 4A/1A driver)
Pulse Secondary Air Injection Solenoid Valve Low Side 4 Output Available, Switched Ground, 1.5A max
Injector 3 Injector 3 Output PnP for Injector 3 (Peak & Hold 4A/1A driver)
Fuel Pump Relay Low Side 11 Output PnP for Fuel Pump relay control signal
Fuel Pressure Control Module Injector 6 Output Available, Switched Ground, 1.5A max
Air Conditioner Relay Low Side 9 Output PnP for A/C Compressor
ECCS Ground Power Ground Input Dedicated
ECCS Ground Power Ground Input Dedicated
Reverse Electrical Flow Return Circuit Permanent +12V Input Dedicated
Injector 2 Injector 2 Output PnP for Injector 2 (Peak & Hold 4A/1A driver)
Turbo Boost Pressure Control Solenoid PW 2 Output Available, Pulse Width Out
Injector 4 Injector 4 Output PnP for Injector 4 (Peak & Hold 4A/1A driver)
Idle Auxiliary Air Control Valve PW 1 Output PnP for Idle Air Control
--- Injector 8 Output Available, Switched Ground, 1.5A max
--- EGT 4 Input Available, jumper set for 0-5V Input
ECCS Ground Power Ground Input Dedicated
AEM EMS 30-6601 I/O Notes
Dedicated, must use AEM replacement trigger disc
Connects to pin 40
Dedicated, must use AEM replacement trigger disc
Connects to pin 31
Wire View of AEM EMS
30-1601 (Series 1) vs 30-6601 (Series 2) EMS differences:
Page 11 of 13
The EMS functions assigned to certain pins have been changed and no longer match the
30-1601 EMS. Unless otherwise noted, the following pins and functions will need to be
manually reconfigured after using AEMTuner to convert a V1.19 (30-1601, Series 1 EMS)
calibration for use with the 30-6601 Series 2 hardware.
Pin
12
15 Data Link Connector Injector 8 EGT 2
42
114 --- EGT 2 Injector 8
Vehicle harness
destination
A/T Signal No. 3
A/T Signal No. 1
30-1601 function 30-6601 function Notes
Low Side 5 CAN1H
Switch 1 CAN1L
LS5 not available
Injector 8 available on pin 114
Switch 1 not available
EGT 2 available on pin 15
Page 12 of 13
AEM Electronics Warranty
Advanced Engine Management Inc. warrants to the consumer that all AEM Electronics
products will be free from defects in material and workmanship for a period of twelve
months from date of the original purchase. Products that fail within this 12-month warranty
period will be repaired or replaced when determined by AEM that the product failed due to
defects in material or workmanship. This warranty is limited to the repair or replacement of
the AEM part. In no event shall this warranty exceed the original purchase price of the
AEM part nor shall AEM be responsible for special, incidental or consequential damages
or cost incurred due to the failure of this product. Warranty claims to AEM must be
transportation prepaid and accompanied with dated proof of purchase. This warranty
applies only to the original purchaser of product and is non-transferable. All implied
warranties shall be limited in duration to the said 12-month warranty period. Improper use
or installation, accident, abuse, unauthorized repairs or alterations voids this warranty.
AEM disclaims any liability for consequential damages due to breach of any written or
implied warranty on all products manufactured by AEM. Warranty returns will only be
accepted by AEM when accompanied by a valid Return Merchandise Authorization (RMA)
number. Product must be received by AEM within 30 days of the date the RMA is issued.
Please note that before AEM can issue an RMA for any electronic product, it is first
necessary for the installer or end user to contact the tech line at 1-800-423-0046 to
discuss the problem. Most issues can be resolved over the phone. Under no
circumstances should a system be returned or a RMA requested before the above process
transpires.
AEM will not be responsible for electronic products that are installed incorrectly, installed
in a non approved application, misused, or tampered with.
Any AEM electronics product can be returned for repair if it is out of the warranty period.
There is a minimum charge of $75.00 for inspection and diagnosis of AEM electronic
parts. Parts used in the repair of AEM electronic components will be extra. AEM will
provide an estimate of repairs and receive written or electronic authorization before repairs
are made to the product.
Page 13 of 13
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