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

KV8-D-15 Ignition switch input

KV8-C-33 Digital in 7

KV8-C-2 Analog in 1

KV8-C-3 Analog in 2

KV8-C-5 Analog in 4

KV8-C-9 Analog in 8

KV8-C-30 Digital in 4

5V ref

EFI main relay (B+)

EFI main relay (B1+)

KV8-C-32 Digital in 6

KV8-C-8 Analog in 7

KV8-C-4 Analog in 3

0V sensor

KV8-C-29 Digital in 3

KV8-C-31 Digital in 5

GND

OEM-A

Stock ECU being replaced

1Ignition switch (IGSW)

2Starter signal (STA)

4Throttle position (VTA1)

5Coolant temperature (THW)

6O2 left front (OXL1)

7EGR temperature sensor

9Diagnostic test 1 (TE1)

11Sensor supply +5V (VC)

12EFI main relay (B+)

13EFI main relay (B1+)

14Neutral start switch (NSW)

16Intake air temperature (THA)

17O2 right front (OXR1)

18Sensor ground (E2)

19Vehicle speed (SPD)

20Diagnostic test 2 (TE2)

22Power ground (E1)

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

KV8-B-13 Aux 4

KV8-B-14 Aux 5

KV8-B-15 Aux 6

KV8-B-5 Injection 5

KV8-C-6 Analog in 5

KV8-C-34 Digital in 8

KV8-C-18 Digital in 9

KV8-C-19 Digital in 10

KV8-C-7 Analog in 6

OEM-B

Stock ECU being replaced

4EFI main relay control (MREL)

5Check-engine lamp (W)

6Fuel pump relay (FPR)

7A/C clutch relay (ACMG)

8Fuel pump control (FC)

11O2 right rear (OXR2)

19Stop light switch (BK)

20A/T kickdown switch (KD)

23A/C request (AC)

24O2 left rear (OXL2)

KV8-C-20 Digital in 11

KV8-C-27 Digital in 1

KV8-D-11 Knock 1 +

KV8-D-19 Analog output 0–5V

KV8-B-26 Ignition 1

KV8-D-6 Sync sensor +

KV8-D-4 Crank index sensor +

KV8-C-28 Digital in 2

KV8-D-17 Knock 2 +

KV8-B-27 Ignition 2

0V sensor

OEM-C

Stock ECU being replaced

1TPS idle switch (IDL)

2Igniter 1 feedback (IGF1)

3Knock sensor 1 (KNK1)

4Check connector VF1

5Ignition 1 (IGT1)

7Cam sensor 1 + (G1+)

8Crank sensor + (NE+)

10Igniter 2 feedback (IGF2)

11Knock sensor 2 (KNK2)

13Ignition 2 (IGT2)

15Cam sensor ground (G-)

16Crank sensor - (NE-)

KV8-B-8 Injection 8

KV8-B-12 Aux 3

KV8-B-11 Aux 2

KV8-B-10 Aux 1

KV8-B-17 Aux 8

KV8-B-2 Injection 2

KV8-B-1 Injection 1

GND

KV8-B-16 Aux 7

KV8-A-10 Lambda 1 heater −

KV8-A-11 Lambda 2 heater −

KV8-B-6 Injection 6

KV8-B-7 Injection 7

KV8-B-3 Injection 3

KV8-B-4 Injection 4

GND

OEM-D

Stock ECU being replaced

4Cold start injector (STJ)

5ISC stepper coil 4 (ISC4)

6ISC stepper coil 3 (ISC3)

7ISC stepper coil 2 (ISC2)

8ISC stepper coil 1 (ISC1)

11Injector 2&8 (#20)

12Injector 1&7 (#10)

13Power ground (E01)

17Cold start injector 1 (STJ1)

19O2 heater 2 (HT2)

20O2 heater 1 (HT1)

21EGR solenoid

22Fuel pressure-up VSV (PR)

24Injector 3&5 (#40)

25Injector 4&6 (#30)

26Power ground (E02)

KV8

KV8-A

KV8

10Lambda 1 heater −

11Lambda 2 heater −

OEM-D-19 O2 heater 2 (HT2)

OEM-D-20 O2 heater 1 (HT1)

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

34ECU ground

OEM-D-12 Injector 1&7 (#10)

OEM-D-11 Injector 2&8 (#20)

OEM-D-24 Injector 3&5 (#40)

OEM-D-25 Injector 4&6 (#30)

OEM-B-8 Fuel pump control (FC)

OEM-D-21 EGR solenoid

OEM-D-22 Fuel pressure-up VSV (PR)

OEM-D-4 Cold start injector (STJ)

GND

OEM-D-7 ISC stepper coil 2 (ISC2)

OEM-D-6 ISC stepper coil 3 (ISC3)

OEM-D-5 ISC stepper coil 4 (ISC4)

OEM-B-5 Check-engine lamp (W)

OEM-B-6 Fuel pump relay (FPR)

OEM-B-7 A/C clutch relay (ACMG)

OEM-D-17 Cold start injector 1 (STJ1)

OEM-D-8 ISC stepper coil 1 (ISC1)

OEM-C-5 Ignition 1 (IGT1)

OEM-C-13 Ignition 2 (IGT2)

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

17Analog sensor 0V reference

18Digital in 9

19Digital in 10

20Digital in 11

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-A-4 Throttle position (VTA1)

OEM-A-5 Coolant temperature (THW)

OEM-A-17 O2 right front (OXR1)

OEM-A-6 O2 left front (OXL1)

OEM-B-11 O2 right rear (OXR2)

OEM-B-24 O2 left rear (OXL2)

OEM-A-16 Intake air temperature (THA)

OEM-A-7 EGR temperature sensor

0V sensor

OEM-B-20 A/T kickdown switch (KD)

OEM-B-23 A/C request (AC)

OEM-C-1 TPS idle switch (IDL)

0V sensor

GND

OEM-C-2 Igniter 1 feedback (IGF1)

OEM-C-10 Igniter 2 feedback (IGF2)

OEM-A-19 Vehicle speed (SPD)

OEM-A-9 Diagnostic test 1 (TE1)

OEM-A-20 Diagnostic test 2 (TE2)

OEM-A-14 Neutral start switch (NSW)

OEM-A-2 Starter signal (STA)

OEM-B-19 Stop light switch (BK)

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 +

15Ignition switch input

17Knock 2 +

19Analog output 0–5V

20Aux 9–12 14V supply

21Sensor supply Vref1 5.0V

ECU 14V supply

Aux 13–16 14V supply

OEM-C-8 Crank sensor + (NE+)

SP-0V · 3 pins

OEM-C-7 Cam sensor 1 + (G1+)

SP-0V · 3 pins

OEM-B-4 EFI main relay control (MREL)

OEM-C-3 Knock sensor 1 (KNK1)

OEM-A-1 Ignition switch (IGSW)

OEM-C-11 Knock sensor 2 (KNK2)

OEM-C-4 Check connector VF1

Aux 9–12 14V supply

5V ref

SP-GND · 8 pins

SP-14V · 6 pins

SP-0V · 8 pins