AEM Series 2 Plug Play EMS 306620 User Manual

							  
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 2010 ADVANCED ENGINE MANAGEMENT INC. 
2205 126th Street Unit A    Hawthorne, CA. 90250 
Phone: (310) 4842322 Fax: (310) 4840152  http://www.aempower.com 
Instruction Part Number: 106620   
Page 1 of 14 
Installation Instructions for: 
EMS P/N 30-6620 
1989-1998 Nissan Skyline RB26DETT  
1993-1998 Nissan Skyline RB25DETT 1989-1994 Nissan Skyline RB20DET 
1990-1995 Nissan 300ZX VG30DE, VG30DETT  1992-1994 Nissan Maxima VE30DE 
1994-1996 Nissan Silvia SR20DET (Except Europe)  1988-1990 Nissan Silvia S13 CA18DET 
1988-1990 Nissan 180SX CA18DET 
 
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. Misu se of this 
product can destroy your engine! If you are not wel l versed in 
engine dynamics and the tuning of management system s or are 
not PC literate, please do not attempt the installa tion. Refer the 
installation to a AEM trained tuning shop or call 8 00042300046 
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 da mage that 
results from the misuse of this product!
 
 
This product is legal in California for racing vehi cles only and should never 
be used on public highways. 
 
Note: Part number 306620 supersedes and replaces p/n 30 1620, 301621, and 301622. 
 
Vehicle  Series I EMS  Series II EMS 
19891998 Nissan Skyline (RB26DETT)  1621/U  6620 
19931998 Nissan Skyline (RB25DETT)  1621/U  6620 
19891994 Nissan Skyline (RB20DET)  1621/U  6620 
19911995 Nissan 300ZX (VG30DETT, VG30DE)  1620/U  66 20 
19921994 Nissan Maxima (VE30DE)  1620/U  6620 
19941996 Nissan Silvia S14 (SR20DET)  1622/U  6620 
19881990 Nissan Silvia S13 (CA18DET)  1622/U  6620 
19881990 Nissan 180SX (CA18DET)  1622/U  6620   
						

							 
Thank you for purchasing an AEM Engine Management System.  
  
The AEM Engine Management System (EMS) is the resul t 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 EM S is a stand alone system, which 
completely replaces the factory ECU and features un ique Plug and Play Technology, 
which means that each system is configured especial ly for your make and model of car 
without any jumper harnesses. There is no need to m odify 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 suppl ied startup calibrations are configured to 
work with OEM sensors, providing a solid starting p oint 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 eliminat ion of addon revlimiters, boost 
controllers, nitrous controllers, fuel computers, e tc. It also includes a configurable onboard 
1MB data logger that can record any 16 EMS paramete rs at up to 250 samples per 
second. Every EMS comes with all functions installe d and activated; there is no need to 
purchase options or upgrades to unlock the full pot ential of your unit. 
 
The installation of the AEM EMS on the supported ve hicles 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 t he 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 goo d starting point and can save 
considerable time and money, it will not replace th e need to tune the EMS for your specific 
application. AEM startup calibrations are not inten ded to be driven aggressively before 
tuning. We strongly recommend that every EMS be tun ed 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 p rocess; be warned that using your 
vehicle as a learning platform can damage your engi ne, your vehicle, and your EMS. 
  
						

							 
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)  Remove the Stock Engine Control Unit 
a) Access  the  stock  Engine  Control  Unit  (ECU).  The  Sky line  ECU  is  located  behind 
the passengerside kick panel. 
b) Carefully  disconnect  the  wiring  harness  from  the  EC U.    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  bo dy,  and  set  them  aside.  Do 
not destroy  or discard the factory  ECU,  as  it can b e  reinstalled  easily  for  street use 
and troubleshooting.  
3)  Install the AEM Engine Management System 
a) Plug  the  factory  wiring  harness  into  the  AEM  EMS  an d  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  EM S  units  do  not  require  USB 
drivers to be installed on the PC. Windows  
e) With the AEMTuner software open, select  ECU>>Upload Calibration to upload the 
startup calibration file (.cal) that most closely m atches the vehicle’s configuration to 
be tuned. Check the Notes section of the calibratio n 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 Throttl e 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 consi dered a sensor error and may 
cause some functions including idle feedback and ac celeration fuel to operate 
incorrectly.  
g) For Nissan vehicles, the OEM camshaft angle sensor’ s  trigger disc must be 
removed and an AEM trigger disc must be installed b efore attempting to start the 
engine. Please see pg. 7 for more info.  
						

							 
 
4)  Ready to begin tuning the vehicle. 
a) Before  starting  the  engine,  verify  that  the  fuel  pu mp  runs  for  a  couple  of  seconds 
when the key is turned on and there is sufficient p ressure 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 atmosp heric pressure correctly.  
 
b) Start the engine and make whatever adjustments may  be needed to sustain a safe 
and reasonably smooth idle. Verify the ignition tim ing: Select Wizards>>Ignition 
Timing Sync  from the  pulldown 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 select ed. 
  Crankshaft timing marks are not labeled for some ve hicles. Consult the factory 
service manual for more information. The diagram be low shows labels for the R33 
Skyline:  
 
    
c) Note:  This  calibration  needs  to  be  properly  tuned  b efore  driving  the  vehicle.  It  is 
intended  for  racing  vehicles  and  may  not  operate  sm oothly  at  idle  or  partthrottle. 
NEVER TUNE THE VEHICLE WHILE DRIVING
   
						

							 
 
5)  Troubleshooting an engine that will not start 
a) Doublecheck  all  the  basics  first…  engines  need  air ,  fuel,  compression,  and  a 
correctlytimed spark event. If any of these are la cking, 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,  m easure  ECU  pinout  voltages, 
replace  recentlyadded  or  untested  components  with  knowngood  spares.  Check 
that all EMS sensor inputs measure realistic temper ature 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.  Thi s  indicates  that  the  EMS  has 
detected  the  expected  cam  and  crank  signals;    if  St at  Sync’d  does  not  turn  on, 
monitor  the  Crank  Tooth  Period  and  T2PER  channels  w hich  indicate  the  time 
between pulses on the Crank and T2 (Cam) signals. B oth of these channels should 
respond  when  the  engine  is  cranking,  if  either  sign al  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  pre ssed  this  usually  indicates  that 
there  is  a  problem  with  the  MAP  sensor  wiring  or  so ftware  calibration  (when  the 
EMS detects that the MAP Volts are above or below t he min/max limits it will run in 
a  failsafe  mode  using  the  TPStoLoad  table  to  gene rate  an  artificial  Engine  Load 
signal using the Throttle input). This may allow th e engine to sputter or start but not 
continue running properly.  
  
						

							 
Application Notes for EMS P/N 306620 
RB26DETT, RB25DETT, RB20DET, VG30DE, VG30DETT, VE30DE, SR20DET, and CA18DET 
Make:  Nissan    Spare Injector Driver:  Inj 7, Pin 17 
Models:  Various, see pg.1    Spare Injector Driver:  I nj 8, Pin 33  (except SR20) 
Years Covered:  Various, see pg.1    Spare Injector Driver:  Inj 9, Pin 111 
Displacement:  2.0L / 2.5L / 2.6L  (Skyline)    Spare Injector Driver:  Inj 10, Pin 115 
Engine Configuration: Inline 6 (Skyline),  V6 (300ZX)    Spare Injector Driver:  Inj 11, Pin 113  
Firing Order:  153624 (Skyline), 123456 
(300ZX), 1342 (SR20/CA18)    Spare Injector Driver:  Inj 12, Pin 102 
N/A, S/C or T/C:  Turbocharged       
Load Sensor Type:  MAF    Boost Solenoid:  PW 2, Pin 5 
and Pin 25 
# Coils:  6       
Ignition driver type:  05V, falling edge trigger      
# Injectors:  6   (P&H drivers: Inj 16)        
Injector Flow Rate:  270cc/min (180SX, Skyline RB20), 
370cc/min (300ZX, SR20DET),  
380cc/min (Skyline GTST),   
440cc/min (Skyline GTR)     Speed Density Input:  MAP, Pin 35 
Injector Resistance:  2 ohm (GTR, 180SX), 11 ohm 
(others)       
Factory Inj Resistors:  Yes (GTR, 180SX), No (other
s)    EGT 1 Location:  Pin 39 
Injection Mode:  Sequential    EGT 2 Location:  Pin 21   
Knock Sensors used:  2 (Skyline, 300ZX), 1 (others)   EGT 3 Location:  Pin 31 
Lambda Sensors:   2 (aftermarket wideband:     EGT 4 L ocation:  Pin 47 
  factory O2 not supported)    Spare 05V Channels:  AD CR11, Pin 104 
Idle Motor Type:  Pulse W idth    Spare 05V Channels: ADCR14, Pin 37 
Main Relay Control:  Yes (not user programmable)    Spare Low Side Driver:  Low Side 3, Pin 19 
Crank Pickup Type:  Optical    Spare Low Side Driver:  Low Side 12, pin 8 
**Crank Teeth/Cycle:  24 (AEM trigger disc)    Check Engine Light:  Low Side 10, Pin 32 
Cam Pickup Type:  Optical       
**Cam Teeth/Cycle:  1 (AEM trigger disc)    Spare Swit ch Input:  *Switch 1, Pin 54 
Transmission  
Offered: M/T, Automatic    Spare Switch Input:  *Switch 2, Pin 
34 
Trans Supported:  M/T only    Spare Switch Input:  *Swi tch 3, Pin 22 
Drive Options:  AWD (Skyline) / RWD (Skyline, 
300ZX, Silvia, 180SX)/ FWD  
(Maxima)    Spare Switch Input:  *Switch 4, Pin 44 
Supplied  
Connectors: 
N/A    A/C Switch Input:  *Switch 6, Pin 46 
AEM extension/patch 
harness  302998    Clutch Switch Input:    
 
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.   
						

							 
  
**Cam / Crank Angle Sensor: AEM trigger disc MUST be used
   
Discrepancies  have  been  observed  in  the  OEM  cam/cra nk  angle  signals  between  model 
years  and/or  trim  levels;  to  avoid  confusion  the  Se ries  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  th e  engine.  Two  discs  are  supplied  with 
each  306620  EMS:  one  disc  fits  the  CAS  sensor  foun d  on  RB,  VG,  CA  and  VE  engines, 
the  other  disc  fits  SR  and  ’99‘03  Skyline  GTR  sens ors.  Please  consult  the  following 
instructions  supplement,  which  will  be  installed  to   the  C:\Program 
Files\AEM\AEMTuner\Instructions folder:  
‘106600B for EMS  3066XX supplement CAS trigge r install RB and SR engines.PDF’  
‘106620A  for  EMS    306620  supplement  CAS  trigge r  install  RB,  VG  and  VE 
engines.PDF’  
 
  
Engine Wiring Harnesses, ‘swapped’ engine installat ions
 
Many Nissan wiring harnesses have been found to con tain significant differences between 
model  years  and/or  trim  levels.  Likely  differences  include:  Crank  signal,  Cam  signal, 
Ignition switch wiring (the Ignition switch input c ontrols the Main Relay output), injector and 
coil  destinations.  Official  documentation  for  many  of  these  vehicles  was  not  offered  in 
English, so it would be very wise to doublecheck t he 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, rerouted, repinn ed or modified in any other manner. It is 
the  user’s  responsibility  to  check  that  the  wiring  on  the  vehicle  matches  the  pinout  chart 
contained  in  this  instruction  manual.  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 AEMsupplied pinout chart!    
The  function  of  several  pins  have  been  changed  from   the  original  301620,  301621,  and 
301622 EMS, please see the pinout chart for more i nfo. 
 
  
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 hi gher (P/N 30213050).  
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 fo r 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 calibratio n was configured to use. 
 
  
EMS Fuel Map, Boost Fuel Trim Table
 
The 306620 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 th e manifold pressure is half as high; this 
should help simplify the tuning process for differe nt 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 insta lled or 
if the Load breakpoints are adjusted. The Boost Fue l Trim value should be set to 90 at 
10kPa, 0 at 100 kPa, +100 at 200 kPa, +200 at 300 k Pa, etc…  
						

							 
  
Peak and Hold Injector Drivers
 
Injectors  16  include  Peak  (4  amps)  and  Hold  (1  amp )  injector  drivers.  These  drivers  may 
be used with peak and hold or saturated type inject ors. The factory Nissan wiring harness 
may  contain  a  resistor  pack  to  prevent  excessive  cu rrent  when  using  lowimpedance 
injectors  with  the  stock  ECU.  With  the  306620  inst alled,  users  can  elect  to  remove  and 
bypass the OEM resistor pack for more precise contr ol of lowimpedance injectors.  
  
Please  note  that  the  injector  response  time  will  be   different  with  and  without  the  factory 
injector  resistor  pack.  If  the  OEM  resistor  pack  ha s  been  removed  and  bypassed,  please 
use  the  correct  battery  offset  wizard  for  your  inje ctors.  Most  battery  offset  wizards  will 
specify  if they are intended for use w ithout a resistor pack.  
  
 
Wiring accessories to the EMS: 
Please  follow  this  suggested  wiring  diagram  when  ad ding  accessories  such  as  UEGO 
gauges,  MAP  sensors,  IAT  sensors,  or  switches  for  u se  with  the  EMS.  Note  that  wire 
polarity is not important for the Air Temperature s ensor.   
   
						

							 
Connection Diagram for EMS P/N 306620 
    
Pin 
 ‘890‘98
 Nissan Skyline RB26DETT
, 
‘930‘98 Nissan Skyline RB25DET,  ‘890‘94 Nissan Skyline RB20DET 
199
001995
 Nissan 
300ZX 
VG30DE, VG30DETT, 199201994 Nissan Maxima VE30DE 
‘940‘96
 Nissan S
ilvia S14
 SR20
DET
, 
‘880‘91 Nissan Silvia S13 CA18DET,  ‘890‘93 Nissan 180SX CA18DET 
AEM EMS  3006620 
I/O 
Notes  
1 
Ignition 1  Ignition 1  Ignition 1 Coil 1 Output 
PnP for Coil 1, 05V rising edge trigger 
2 
Ignition 5  Ignition 2  Ignition 2 
Coil 5 Output 
PnP for Coil 5, 05V rising edge trigger 
3 
Ignition 3  Ignition 3   Ignition 3 (CA18DET only) 
Coil 3 Output 
PnP for Coil 3, 05V rising edge trigger 
4 
AAC Valve 
←
 
 
PW 1 Output 
PnP for Idle Air Control, connects to Pin 106 
5 
A/T Control Unit 
←
 
Wastegate Solenoid (JDM CA18 only) 
PW 2 Output 
PnP for Boost control, connects to Pin 25 
6 
Cooling Fan Relay  
(RB26DETT only)  Cooling Fan Sub Relay  
(300ZX Turbo Only)  Air Conditioner Relay (CA18DET only) 
Low Side 5 Output 
PnP for Cooling Fan  (CA18DET only: PnP for AC) 
7 
Tachometer 
←
 
←
 
Low Side 7 Output 
PnP for Tachometer, internal pullup resistor to 12V
 
8 
 AIV Solenoid (9092 300ZX), 
Power Solenoid (Maxima)  Variable Butterfly Solenoid  
(JDM CA18DET only)  Low Side 12  Output 
Available, switched Ground, 1.5A max 
9 
Air Conditioner Relay 
←
 
←
 
Low Side 6 Output 
PnP for A/C Compressor 
10 
ECM Ground 
←
 
←
 
Power Ground  Input 
Dedicated 
11 
Ignition 6  Ignition 4  Ignition 3 (SR20DET only)   
Ignition 4 (CA18DET only)  Coil 6 
Output 
PnP for Coil 6, 05V rising edge trigger 
12 
Ignition 2  Ignition 5  Ignition 4 (SR20DET only) 
Coil 2 Output 
PnP for Coil 2, 05V rising edge trigger 
13 
Ignition 4  Ignition 6   
Coil 4 Output 
PnP for Coil 4, 05V rising edge trigger 
14 
A/T Control Unit 
←
 
←
 
Idle 5 Output 
Avail, switched Ground / +12V, 1.5A Max 
15 
A/T Control Unit 
←
 
←
 
Idle 6 Output 
Avail, switched +12V / Ground, 1.5A Max 
16 
ECCS Relay control,  
Ignition Relay control 
←
 
←
  Main Relay 
(control)  Output 
Dedicated, EMS activates relay with switched GND 
17 
  Data Link Connector  Data Link Connector  Injector 7 Output 
Avail, Switched Ground, 1.5A max 
18 
Fuel Pump Relay Control Signal 
←
 
←
 
Low Side 1 Output 
PnP for Fuel Pump 
19 
Power Steering Oil Pressure Switch  Cooling Fan Relay
  Cooling Fan Relay (SR20DET only) 
Low Side 3 Output 
PnP for Cooling Fan 
20 
ECM Ground 
←
 
←
 
Power Ground  Input 
Dedicated 
Wire View of AEM EMS 
PnP 
These pins are used in the AEMsupplied startup cali bration. 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 location of these pins is fixed and must not be  changed.  
						

							 
Connection Diagram for EMS P/N 306620
 
Pin 
 ‘890‘98
 Nissan Skyline RB26DETT
, 
‘930‘98 Nissan Skyline RB25DET,  ‘890‘94 Nissan Skyline RB20DET 
199
001995
 Nissan 
300ZX 
VG30DE, VG30DETT, 199201994 Nissan Maxima VE30DE 
‘940‘96
 Nissan S
ilvia S14
 SR20
DET
, 
‘880‘91 Nissan Silvia S13 CA18DET,  ‘890‘93 Nissan 180SX CA18DET 
AEM EMS  3006620 
I/O 
Notes 
21 
Diagnostics Receive Data 
←
 
←
 EGT 2  Input 
Available, jumper set for 05V Input 
22 
Diagnostics Transmit Data 
←
 
←
 Switch 3  Input 
Available, switch must connect to ground 
23 
Knock Sensor (Cylinders 13)  Knock Sensor   Knock Se nsor  
Knock 1  Input 
Available, software knock filter 
24 
Knock Sensor (Cylinders 46)      Knock 2  Input 
Available, software knock filter 
25 
Wastegate Valve Control Solenoid 
Signal  Wastegate Solenoids  
(300ZX TT Only)  Wastegate Solenoid  (SR20DET only) 
PW 2 Output 
PnP for Boost control, connects to Pin 5  
26 
Mass Air Flow Sensor Ground 
←
 
←
 
Power Ground  Input 
Dedicated 
27 
Rear Mass Air Flow Sensor 
(RB26DETT)  Mass Air Flow Sensor  Mass Air Flow Sensor 
MAF  Input 
PnP for MAF Sensor 
28 
Engine Coolant Temperature Sensor 
←
 
←
 Coolant  Input 
PnP for Engine Coolant Temp 
29 
Front Heated Oxygen Sensor Signal  Right Side Heated Oxygen 
Sensor  Heated Oxygen Sensor Signal 
O2 #1  Input 
Dedicated, 05V signal 
30 
Sensor Ground 
←
 
←
 Sensor 
Ground  Output 
Dedicated 
31 
Diagnostics Clock 
←
 
←
 
EGT 3  Input 
Available, jumper set for 05V Input 
32 
Malfunction Indicator Lamp 
←
 
←
 Low Side 
Driver 10  Output 
Avail, Switched Ground, 1.5A Max 
33 
Exhaust Temperature Light 
(RB25DET Only)  FICD Solenoid (300ZX Only)  Cooling Fan Hi Speed (SR20DET) /  
Diagnostics (CA18DET)  Injector 8  Output 
PnP for Cooling Fan 
34 
Front Mass Air Flow Ground 
(RB26DETT)  Power Steering Oil Press sw   Power Steering Oil Press sw 
(SR20DET Only)  Switch 2  Input 
Available, switch must connect to ground 
35 
Front Mass Air Flow Signal  (RB26DETT)  Fuel Pump Voltage Control 
(300ZX Turbo Only)  Boost Pressure Sensor (SR20DET 
Only)  MAP  Input 
Available, use this pin for Speed Density conversio n 
36 
IAT Sensor (RB26) / FICD solenoid 
(RB25)  Fuel Temperature Sensor 
(300ZX Only)    AIT  Input 
Avail, Air Temperature, 2.2kU pullup resistor 
37 
    Mass Air Flow Pin D (CA18DETNon 
Catalytic Model Only)  ADCR14  Input 
Avail, 05 Volt Input 
38 
Throttle Position Sensor 
←
 
←
  TPS  Input 
PnP for Throttle Position signal 
39 
  EGR Temperature Sensor   
EGT 1  Input 
Available, jumper set for 05V Input 
40 
     CAN1H  
Dedicated 
 
Wire View of AEM EMS