100%
Stock ECU being replaced
SL4-B-16 Knock 1 +
Ignition power 2
Ignition power 1
GND
GND
SL4-B-7 Sync sensor +
SL4-B-5 Crank index sensor +
GND
GND
11–12 no data
SL4-A-29 Ignition channel 4
SL4-A-28 Ignition channel 3
SL4-A-27 Ignition channel 2
SL4-A-26 Ignition channel 1
17 no data
SL4-A-20 Digital input 1
19 no data
5V ref
5V ref
22 no data
0V sensor
0V sensor
SL4-B-15 Analog input 5
SL4-B-14 Analog input 4
27 no data
29 no data
SL4-B-11 Analog input 1
S2K-A
Stock ECU being replaced
1Knock sensor
2Ignition power 2
3Ignition power 1
4Power ground 2
5Power ground 1
6Cam position sensor (T2)
7Crank position sensor (T1)
8Logic ground 2
9Logic ground 1
11–12 no data
13Ignition coil 4
14Ignition coil 3
15Ignition coil 2
16Ignition coil 1
17 no data
18Vehicle speed sensor
19 no data
20Sensor voltage 2
21Sensor voltage 1
22 no data
23Sensor ground 2
24Sensor ground 1
25Accelerator pedal position B
26Accelerator pedal position A
27 no data
29 no data
30MAP sensor
1 no data
SL4-A-4 Injection channel 4
SL4-A-3 Injection channel 3
SL4-A-2 Injection channel 2
SL4-A-1 Injection channel 1
SL4-A-10 Auxiliary output 1
7 no data
SL4-B-20 Analog input 7 (switchable 1k pull-up)
9 no data
SL4-A-21 Digital input 2
12 no data
14 no data
16 no data
SL4-B-21 Analog input 8 (switchable 1k pull-up)
SL4-A-17 Auxiliary output 8
22–24 no data
S2K-B
Stock ECU being replaced
1 no data
2Injector 4
3Injector 3
4Injector 2
5Injector 1
6VTEC solenoid
7 no data
8Coolant temp sensor
9 no data
11VTEC oil pressure switch
12 no data
14 no data
16 no data
17Intake air temp sensor
21Evap canister purge valve
22–24 no data
2–3 no data
5–6 no data
SL4-A-22 Digital input 3
SL4-A-23 Digital input 4
10–14 no data
16–17 no data
S2K-D
Stock ECU being replaced
2–3 no data
5–6 no data
8Brake pedal position switch
9Cruise clutch signal
10–14 no data
16–17 no data
2 no data
GND
0V sensor
5V ref
6 no data
SL4-B-3 EFI relay output (low side, 200 mA)
SL4-B-4 Ignition switch input
10 no data
SL4-B-27 CAN 1 H
SL4-A-12 Auxiliary output 3
SL4-B-19 Analog input 6
SL4-A-11 Auxiliary output 2
SL4-A-14 Auxiliary output 5
SL4-B-22 Analog input 9 (switchable 1k pull-up)
23 no data
SL4-B-28 CAN 1 L
SL4-A-15 Auxiliary output 6
SL4-A-16 Auxiliary output 7
SL4-A-24 Digital input 5
31 no data
S2K-E
Stock ECU being replaced
2 no data
3Logic ground 3
4Sensor ground 3
5Sensor voltage 3
6 no data
7Main relay control
9Ignition signal
10 no data
11CAN H
12Radiator fan control
16Power steering load detector
17Fuel pump relay
18A/C clutch relay
20Secondary O2 sensor
23 no data
24CAN L
25Engine speed pulse (tacho)
26Vehicle speed output
28A/C switch signal
31 no data
SL4
SL4-A
SL4
1Injection channel 1
2Injection channel 2
3Injection channel 3
4Injection channel 4
5–8 no data
10Auxiliary output 1
11Auxiliary output 2
12Auxiliary output 3
14Auxiliary output 5
15Auxiliary output 6
16Auxiliary output 7
17Auxiliary output 8
18Auxiliary output 9
19Auxiliary output 10
20Digital input 1
21Digital input 2
22Digital input 3
23Digital input 4
24Digital input 5
26Ignition channel 1
27Ignition channel 2
28Ignition channel 3
29Ignition channel 4
30–33 no data
34Aux 9–10 14V supply
S2K-B-5 Injector 1
S2K-B-4 Injector 2
S2K-B-3 Injector 3
S2K-B-2 Injector 4
5–8 no data
S2K-B-6 VTEC solenoid
S2K-E-17 Fuel pump relay
S2K-E-12 Radiator fan control
S2K-E-18 A/C clutch relay
S2K-E-25 Engine speed pulse (tacho)
S2K-E-26 Vehicle speed output
S2K-B-21 Evap canister purge valve
TB-J-M+ Throttle motor +
TB-J-M- Throttle motor −
S2K-A-18 Vehicle speed sensor
S2K-B-11 VTEC oil pressure switch
S2K-D-8 Brake pedal position switch
S2K-D-9 Cruise clutch signal
S2K-E-28 A/C switch signal
S2K-A-16 Ignition coil 1
S2K-A-15 Ignition coil 2
S2K-A-14 Ignition coil 3
S2K-A-13 Ignition coil 4
30–33 no data
Aux 9–10 14V supply
SL4-B
SL4
1ECU 14V supply
2Sensor supply Vref1 5.0V
3EFI relay output (low side, 200 mA)
4Ignition switch input
5Crank index sensor +
6Crank index sensor −
7Sync sensor +
8Sync sensor −
10Analog sensor 0V reference
11Analog input 1
12Analog input 2
13Analog input 3
14Analog input 4
15Analog input 5
16Knock 1 +
18ECU ground
19Analog input 6
20Analog input 7 (switchable 1k pull-up)
21Analog input 8 (switchable 1k pull-up)
22Analog input 9 (switchable 1k pull-up)
26ECU ground
27CAN 1 H
28CAN 1 L
29–30 no data
ECU 14V supply
5V ref
S2K-E-7 Main relay control
S2K-E-9 Ignition signal
S2K-A-7 Crank position sensor (T1)
SP-0V · 4 pins
S2K-A-6 Cam position sensor (T2)
SP-0V · 4 pins
0V sensor
S2K-A-30 MAP sensor
TB-J-TPS1 Throttle position 1
TB-J-TPS2 Throttle position 2
S2K-A-26 Accelerator pedal position A
S2K-A-25 Accelerator pedal position B
S2K-A-1 Knock sensor
GND
S2K-E-16 Power steering load detector
S2K-B-8 Coolant temp sensor
S2K-B-17 Intake air temp sensor
S2K-E-20 Secondary O2 sensor
GND
S2K-E-11 CAN H
S2K-E-24 CAN L
29–30 no data
TB
TB-J
TB
GNDThrottle sensor ground
M-Throttle motor −
M+Throttle motor +
TPS1Throttle position 1
TPS2Throttle position 2
VCCThrottle sensor 5V supply
0V sensor
SL4-A-19 Auxiliary output 10
SL4-A-18 Auxiliary output 9
SL4-B-12 Analog input 2
SL4-B-13 Analog input 3
Throttle sensor 5V supply
SP-14V · 5 pins
SP-GND · 8 pins
SP-0V · 8 pins
SP-5V · 6 pins
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