Series 2 Plug & Play EMS
13
© 2021 AEM Performance Electronics
PINOUTS
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.
Connector A
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 ground on EMS)
B2
Relay pins 2 & 4
tapped
A6
Camshaft position sensor (T2 on EMS)
C20
tapped
A7
Crankshaft position sensor (T1 on EMS)
C8
tapped
A8
Logic Ground 2
--
--
A9
Logic Ground 1
--
--
A10
AF sensor heater
--
--
A11
--
--
--
A12
--
--
--
A13
Ignition Coil 4 (Coil 4 on EMS)
C14
intercepted
A14
Ignition Coil 3 (Coil 3 on EMS)
C13
intercepted
A15
Ignition Coil 2 (Coil 2 on EMS)
C12
intercepted
A16
Ignition Coil 1 (Coil 1 on EMS)
C4
intercepted
A17
--
--
--
A18
Vehicle Speed Sensor (T3 on EMS)
C23
tapped
A19
--
--
--
A20
Sensor Voltage 2
--
--
A21
Sensor Voltage 1
--
--
A22
--
--
--
A23
Sensor Ground 2 (Sensor ground on EMS)
C18
tapped
A24
Sensor Ground 1 (Sensor ground on EMS)
C7
tapped
A25
Accelerator Pedal Position B
--
--
A26
Accelerator Pedal Position A
--
--
A27
--
--
--
A28
AF sensor 1 signal (-)
--
--
A29
--
--
--
A30
MAP signal (MAP on EMS)
C17
tapped
A31
AF sensor 1 signal (+)
--
--
Connector B
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
