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.

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Stock ECU being replaced

KV8-B-1 Injection 1

KV8-B-2 Injection 2

KV8-B-3 Injection 3

KV8-B-8 Injection 8

KV8-D-9 EFI relay output (low side, 200 mA)

KV8-B-17 Aux 8

KV8-B-11 Aux 2

KV8-A-10 Lambda 1 heater −

KV8-B-26 Ignition 1

GND

ECM power source (IGP1)

KV8-B-4 Injection 4

KV8-B-5 Injection 5

KV8-B-6 Injection 6

KV8-B-12 Aux 3

KV8-B-13 Aux 4

KV8-B-7 Injection 7

KV8-A-11 Lambda 2 heater −

KV8-B-10 Aux 1

KV8-B-27 Ignition 2

GND

0V sensor

OEM-A

Stock ECU being replaced

1Injector 1 (INJ1)

2Injector 2 (INJ2)

3Injector 3 (INJ3)

4EVAP canister vent shut valve (VSV)

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)

21EVAP purge control solenoid (PCS)

22Front primary O2 heater (FPO2SHTC)

23Rear primary O2 heater (RPO2SHTC)

24Ignition coil 2 (IGN COIL2)

25Power ground (PG2)

26Logic ground (LG1)

KV8-C-30 Digital in 4

KV8-B-31 Ignition 6

KV8-C-31 Digital in 5

KV8-C-32 Digital in 6

KV8-D-6 Sync sensor +

KV8-D-4 Crank index sensor +

0V sensor

KV8-B-30 Ignition 5

KV8-B-29 Ignition 4

KV8-B-28 Ignition 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)

KV8-C-33 Digital in 7

KV8-C-34 Digital in 8

KV8-C-27 Digital in 1

OEM-C

Stock ECU being replaced

1ECM power source (IGP2)

4Clutch switch (MTCLS, M/T)

6Starter switch (STS)

7Vehicle speed sensor (VSS)

KV8-D-17 Knock 2 +

KV8-C-6 Analog in 5

KV8-C-11 Analog in 10

KV8-C-2 Analog in 1

5V ref

0V sensor

KV8-C-5 Analog in 4

KV8-D-11 Knock 1 +

KV8-C-7 Analog in 6

KV8-C-8 Analog in 7

KV8-C-9 Analog in 8

KV8-C-10 Analog in 9

KV8-C-12 Analog in 11

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)

20EGR valve lift sensor (EGRL)

5V ref

0V sensor

KV8-B-16 Aux 7

KV8-C-29 Digital in 3

KV8-C-4 Analog in 3

KV8-C-3 Analog in 2

5V ref

0V sensor

KV8-C-28 Digital in 2

KV8-B-14 Aux 5

KV8-B-15 Aux 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)

KV8

KV8-A

KV8

10Lambda 1 heater −

11Lambda 2 heater −

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

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

KV8-B

KV8

1Injection 1

2Injection 2

3Injection 3

4Injection 4

5Injection 5

6Injection 6

7Injection 7

8Injection 8

9ECU ground

10Aux 1

11Aux 2

12Aux 3

13Aux 4

14Aux 5

15Aux 6

16Aux 7

17Aux 8

26Ignition 1

27Ignition 2

28Ignition 3

29Ignition 4

30Ignition 5

31Ignition 6

34ECU ground

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-21 EVAP purge control solenoid (PCS)

OEM-A-4 EVAP canister vent shut valve (VSV)

GND

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

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

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

OEM-A-20 IAB control solenoid (IABCS)

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-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)

GND

KV8-C

KV8

1ECU ground

2Analog in 1

3Analog in 2

4Analog in 3

5Analog in 4

6Analog in 5

7Analog in 6

8Analog in 7

9Analog in 8

10Analog in 9

11Analog in 10

12Analog in 11

17Analog sensor 0V reference

25Analog sensor 0V reference

26ECU ground

27Digital in 1

28Digital in 2

29Digital in 3

30Digital in 4

31Digital in 5

32Digital in 6

33Digital in 7

34Digital in 8

GND

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-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-20 EGR valve lift sensor (EGRL)

0V sensor

GND

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-C-4 Clutch switch (MTCLS, M/T)

OEM-C-6 Starter switch (STS)

KV8-D

KV8

1ECU 14V supply

2Aux 13–16 14V supply

4Crank index sensor +

5Crank index sensor −

6Sync sensor +

7Sync sensor −

9EFI relay output (low side, 200 mA)

11Knock 1 +

17Knock 2 +

20Aux 9–12 14V supply

21Sensor supply Vref1 5.0V

22Sensor supply Vref2 5.0V

ECU 14V supply

Aux 13–16 14V supply

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

OEM-A-5 Fuel pump relay (FLR1)

OEM-D-13 Knock sensor front (KSF)

OEM-D-2 Knock sensor rear (KSR)

Aux 9–12 14V supply

5V ref

SP-GND · 9 pins

SP-0V · 14 pins

SP-5V1 · 4 pins

SP-14V · 10 pins