AEM Series 2 Plug Play EMS 306053 User Manual

Page 11 of 21 
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...

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Original Honda S2000 ECU Pinout 
This pinout is for the original wiring harness on the Honda S2000 showing the corresponding 
pin on the AEM EMS through the adapter harness.  
Please note: Connector C is not present in the original wiring harness. 
 
Pin Name AEM EMS  
pin location 
Tapped or 
intercepted? 
A1 Knock sensor (Knock 1 on EMS)  C3  tapped 
A2 Ignition power 2  --  -- 
A3 Ignition power 1  --  -- 
A4 Power ground 2 (Power ground on EMS)  B10  tapped 
A5 Power ground 1 (Power...

Page 13 of 21 
Pin Name AEM EMS  
pin location 
Tapped or 
intercepted?
B1 -- (HS 4 on EMS)  D4  intercepted 
B2 Injector 4 (Injector 4 on EMS)  B5  intercepted 
B3 Injector 3 (Injector 3 on EMS)  B4  intercepted 
B4 Injector 2 (Injector 2 on EMS)  B3  intercepted 
B5 Injector 1 (Injector 1 on EMS)  B11  intercepted 
B6 VTEC solenoid valve (HS 1 on EMS)  B12  intercepted 
B7 -- -- -- 
B8 Coolant Temperature signal 1 (CLT on EMS)  C26  tapped 
B9 -- -- -- 
B10 Alternator L signal  --  -- 
B11 VTEC oil...

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Pin Name AEM EMS  
pin location 
Tapped or 
intercepted?
E1 Engine Coolant Temperature sensor 2  --  -- 
E2 -- -- -- 
E3 Logic Ground 3  --  -- 
E4 Sensor Ground 3  --  -- 
E5 Sensor Voltage 3  --  -- 
E6 -- -- -- 
E7 Main Relay control  --  -- 
E8 AF sensor heater relay  --  -- 
E9 Ignition signal (ignition signal on EMS)  Relay pin 1 & B1  tapped 
E10 -- -- -- 
E11 CAN High  --  -- 
E12 Radiator Fan control (LS 8 on EMS)  A20  intercepted 
E13 SEFMJ  multiplex communication  --  -- 
E14...

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Application Notes for EMS P/N 30-6053 
F22C1 
Make: Acura/Honda   Description Function Pin Model:  S2000    Spare Injector Drivers:  Injector 5  D1 Years Covered:  2006-2008    Spare Injector Drivers:  Injector 6  B19 Engine Displacement:  2.2L    Spare Injector Drivers:  Injector 7  D2 Engine Configuration:  Inline 4    Spare Injector Drivers:  Injector 8  B16 Firing Order:  1-3-4-2    Spare Injector Drivers:  Injector 9  A12 or A13 N/A, S/C or T/C:  N/A    Spare Injector Drivers:...

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Connection Diagram for EMS P/N 30-6053 
 
Please note that the following pinout is for the AEM EMS and not the original Honda S2000 
wiring harness.  
 
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...

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Connection Diagram for EMS P/N 30-6053 
 
Pin  AEM adapter harness pinout  (gray connectors wired to vehicle wiring harness) 
AEM EMS 30-6053 EMS I/O EMS pin description 
A17 -- Low side 6 Output Available, switched ground, 1.5A max 
A18 -- Low side 10 Output Available, switched ground, 1.5A max 
A19 --  Low side 7  Output Available, switched ground, 1.5A max 
A20 Radiator fan control  Low side 8 Output PnP for radiator fan control (cannot be set higher than stock ECU temperature of...

Page 18 of 21 
Connection Diagram for EMS P/N 30-6053 
 
Pin  AEM adapter harness pinout  (gray connectors wired to vehicle wiring harness) 
AEM EMS 30-6053 EMS I/O EMS pin description 
B1 Ignition signal  +12V switched Input Dedicated, +12V power for AEM EMS 
B2 Power ground 1  Power ground Input Dedicated, power ground for AEM EMS 
B3 Injector 2  Injector 2 Output PnP for injector number 2 
B4 Injector 3  Injector 3 Output PnP for injector number 3 
B5 Injector 4  Injector 4 Output PnP for injector...

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Connection Diagram for EMS P/N 30-6053 
 
Pin  AEM adapter harness pinout  (gray connectors wired to vehicle wiring harness) AEM EMS 30-6053 EMS I/O EMS pin description 
C1 --  Low side 2  Output Available, switched ground, 1.5A max 
C2 -- -- --  Not used 
C3 Knock sensor  Knock 1  Input PnP for knock sensor signal  (depin from stock ECU if more sensitivity is required) 
C4 Ignition coil 1  Coil 1  Output PnP for ignition coil 1 (connected to B13) 
C5 -- EGT 4 Input Available, exhaust gas...

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Connection Diagram for EMS P/N 30-6053 
 
Pin  AEM adapter harness pinout  (gray connectors wired to vehicle wiring harness) 
AEM EMS 30-6053 EMS I/O EMS pin description 
D1 -- Injector 5 Output Available, pulse width modulated switched ground, 1.5A max 
D2 -- Injector 7 Output Available, pulse width modulated switched ground, 1.5A max 
D3 -- Idle 1 Output Available, switched ground, 1.5A max 
D4 --  High side 4 Output Available, switched +12V power 
D5 -- Idle 4 Output Available, switched...