Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.

100%

Stock ECU being replaced

SL8-A-1 Injection channel 1

SL8-A-2 Injection channel 2

SL8-A-3 Injection channel 3

SL8-B-3 EFI relay output (low side, 200 mA)

SL8-A-17 Auxiliary output 8

SL8-A-13 Auxiliary output 4

SL8-A-10 Auxiliary output 1

SL8-A-26 Ignition channel 1

GND

ECM power source (IGP1)

SL8-A-4 Injection channel 4

SL8-A-5 Injection channel 5

SL8-A-6 Injection channel 6

SL8-A-7 Injection channel 7

SL8-A-8 Injection channel 8

SL8-A-11 Auxiliary output 2

SL8-A-12 Auxiliary output 3

SL8-A-27 Ignition channel 2

GND

0V sensor

OEM-A

Stock ECU being replaced

1Injector 1 (INJ1)

2Injector 2 (INJ2)

3Injector 3 (INJ3)

5Fuel pump relay (FLR1)

8A/C clutch relay (ACC)

9Front secondary O2 heater (FSO2SHTC)

10Rear secondary O2 heater (RSO2SHTC)

11Ignition coil 1 (IGN COIL1)

12Power ground (PG1)

13ECM power source (IGP1)

14Injector 4 (INJ4)

15Injector 5 (INJ5)

16Injector 6 (INJ6)

17EVAP bypass solenoid (2WBS)

20IAB control solenoid (IABCS)

22Front primary O2 heater (FPO2SHTC)

23Rear primary O2 heater (RPO2SHTC)

24Ignition coil 2 (IGN COIL2)

25Power ground (PG2)

26Logic ground (LG1)

SL8-A-23 Digital input 4

SL8-A-31 Ignition channel 6

SL8-A-24 Digital input 5

SL8-A-25 Digital input 6

SL8-B-7 Sync sensor +

SL8-B-5 Crank index sensor +

0V sensor

SL8-A-30 Ignition channel 5

SL8-A-29 Ignition channel 4

SL8-A-28 Ignition channel 3

0V sensor

OEM-B

Stock ECU being replaced

1VTEC pressure switch front (VTP SWF)

2Ignition coil 6 (IGN COIL6)

3VTEC pressure switch rear (VTP SWR)

4Neutral switch (NT SW, M/T)

6Cylinder position sensor 1 + (CYP 1P)

8Crank position sensor 1 + (CKP 1P)

9Logic ground (LG2)

10Ignition coil 5 (IGN COIL5)

11Ignition coil 4 (IGN COIL4)

12Ignition coil 3 (IGN COIL3)

13Cylinder position sensor 2 return (CYP 2M)

14Cylinder position sensor 1 return (CYP 1M)

15Crank position sensor 2 return (CKP 2M)

16Crank position sensor 1 return (CKP 1M)

ECM power source (IGP2)

SL8-A-20 Digital input 1

OEM-C

Stock ECU being replaced

1ECM power source (IGP2)

7Vehicle speed sensor (VSS)

SL8-B-24 Knock 2 +

SL8-B-15 Analog input 5

SL8-B-23 Analog input 10 (switchable 1k pull-up)

SL8-B-11 Analog input 1

5V ref

0V sensor

SL8-B-14 Analog input 4

SL8-B-16 Knock 1 +

SL8-B-19 Analog input 6

SL8-B-20 Analog input 7 (switchable 1k pull-up)

SL8-B-21 Analog input 8 (switchable 1k pull-up)

SL8-B-22 Analog input 9 (switchable 1k pull-up)

OEM-D

Stock ECU being replaced

2Knock sensor rear (KSR)

7Engine coolant temperature (ECT)

8Intake air temperature (IAT)

9MAP sensor

10Sensor 5V supply (VCC2)

11Sensor ground (SG2)

12Throttle position sensor (TPS)

13Knock sensor front (KSF)

16Front secondary O2 signal (O2S FS)

17Rear secondary O2 signal (O2S RS)

18Front primary O2 signal (O2S FP)

19Rear primary O2 signal (O2S RP)

5V ref

0V sensor

SL8-A-16 Auxiliary output 7

SL8-A-22 Digital input 3

SL8-B-13 Analog input 3

SL8-B-12 Analog input 2

5V ref

0V sensor

SL8-A-21 Digital input 2

SL8-A-14 Auxiliary output 5

SL8-A-15 Auxiliary output 6

OEM-F

Stock ECU being replaced

1Sensor 5V supply (VCC1)

2Sensor ground (SG1)

4Fuel pump relay 2 (FLR2)

6Brake switch 2 (BKSW2)

12Accelerator pedal position 2 (AP2)

13Accelerator pedal position 1 (AP1)

14Accelerator pedal 5V supply (VCC3)

15Accelerator pedal ground (SG3)

16Brake switch 1 (BKSW1)

19VTEC solenoid front (VT SOLF)

20VTEC solenoid rear (VT SOLR)

Throttle motor power source 1 (IGM1)

Throttle motor power source 2 (IGM2)

GND

Throttle motor common power phases 1&3 (COM1)

Throttle motor common power phases 2&4 (COM2)

OEM-G

Stock ECU being replaced

2Throttle motor power source 1 (IGM1)

3Throttle motor power source 2 (IGM2)

7Throttle motor ground 1 (PGM1)

8Throttle motor ground 2 (PGM2)

9Throttle motor common power phases 1&3 (COM1)

10Throttle motor common power phases 2&4 (COM2)

SL8

SL8-A

SL8

1Injection channel 1

2Injection channel 2

3Injection channel 3

4Injection channel 4

5Injection channel 5

6Injection channel 6

7Injection channel 7

8Injection channel 8

10Auxiliary output 1

11Auxiliary output 2

12Auxiliary output 3

13Auxiliary output 4

14Auxiliary output 5

15Auxiliary output 6

16Auxiliary output 7

17Auxiliary output 8

20Digital input 1

21Digital input 2

22Digital input 3

23Digital input 4

24Digital input 5

25Digital input 6

26Ignition channel 1

27Ignition channel 2

28Ignition channel 3

29Ignition channel 4

30Ignition channel 5

31Ignition channel 6

34Aux 9–10 14V supply

OEM-A-1 Injector 1 (INJ1)

OEM-A-2 Injector 2 (INJ2)

OEM-A-3 Injector 3 (INJ3)

OEM-A-14 Injector 4 (INJ4)

OEM-A-15 Injector 5 (INJ5)

OEM-A-16 Injector 6 (INJ6)

OEM-A-17 EVAP bypass solenoid (2WBS)

OEM-A-20 IAB control solenoid (IABCS)

OEM-A-10 Rear secondary O2 heater (RSO2SHTC)

OEM-A-22 Front primary O2 heater (FPO2SHTC)

OEM-A-23 Rear primary O2 heater (RPO2SHTC)

OEM-A-9 Front secondary O2 heater (FSO2SHTC)

OEM-F-19 VTEC solenoid front (VT SOLF)

OEM-F-20 VTEC solenoid rear (VT SOLR)

OEM-F-4 Fuel pump relay 2 (FLR2)

OEM-A-8 A/C clutch relay (ACC)

OEM-C-7 Vehicle speed sensor (VSS)

OEM-F-16 Brake switch 1 (BKSW1)

OEM-F-6 Brake switch 2 (BKSW2)

OEM-B-1 VTEC pressure switch front (VTP SWF)

OEM-B-3 VTEC pressure switch rear (VTP SWR)

OEM-B-4 Neutral switch (NT SW, M/T)

OEM-A-11 Ignition coil 1 (IGN COIL1)

OEM-A-24 Ignition coil 2 (IGN COIL2)

OEM-B-12 Ignition coil 3 (IGN COIL3)

OEM-B-11 Ignition coil 4 (IGN COIL4)

OEM-B-10 Ignition coil 5 (IGN COIL5)

OEM-B-2 Ignition coil 6 (IGN COIL6)

Aux 9–10 14V supply

SL8-B

SL8

1ECU 14V supply

2Sensor supply Vref1 5.0V

3EFI relay output (low side, 200 mA)

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)

23Analog input 10 (switchable 1k pull-up)

24Knock 2 +

26ECU ground

29–30 no data

ECU 14V supply

5V ref

OEM-A-5 Fuel pump relay (FLR1)

OEM-B-8 Crank position sensor 1 + (CKP 1P)

SP-0V · 9 pins

OEM-B-6 Cylinder position sensor 1 + (CYP 1P)

SP-0V · 9 pins

0V sensor

OEM-D-9 MAP sensor

OEM-F-13 Accelerator pedal position 1 (AP1)

OEM-F-12 Accelerator pedal position 2 (AP2)

OEM-D-12 Throttle position sensor (TPS)

OEM-D-7 Engine coolant temperature (ECT)

OEM-D-13 Knock sensor front (KSF)

GND

OEM-D-16 Front secondary O2 signal (O2S FS)

OEM-D-17 Rear secondary O2 signal (O2S RS)

OEM-D-18 Front primary O2 signal (O2S FP)

OEM-D-19 Rear primary O2 signal (O2S RP)

OEM-D-8 Intake air temperature (IAT)

OEM-D-2 Knock sensor rear (KSR)

GND

29–30 no data

SP-0V · 13 pins

SP-GND · 7 pins

SP-14V · 9 pins

SP-5V1 · 5 pins