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

ETCS power (TBP, throttle bypass)

KV8-C-8 Analog in 7

KV8-A-10 Lambda 1 heater −

KV8-A-11 Lambda 2 heater −

OEM-E2

Stock ECU being replaced

13ETCS power (TBP, throttle bypass)

24O2 right rear (OXR2)

25O2 heater right rear (HTR2)

26O2 heater left rear (HTL2)

KV8-B-10 Aux 1

KV8-B-7 Injection 7

KV8-B-8 Injection 8

ETCS main relay (+BM)

EFI main relay (+B2)

KV8-D-15 Ignition switch input

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

EFI main relay (+B)

OEM-E3

Stock ECU being replaced

4Fuel pump relay (FPR)

5Fuel pump control (FC)

6Check-engine lamp (W)

7ETCS main relay (+BM)

8EFI main relay (+B2)

9Ignition switch (IGSW)

10EFI main relay control (MREL)

16EFI main relay (+B)

KV8-C-30 Digital in 4

KV8-C-31 Digital in 5

KV8-C-32 Digital in 6

KV8-C-9 Analog in 8

KV8-B-11 Aux 2

KV8-C-13 Analog in 12

OEM-E4

Stock ECU being replaced

2Starter signal (STA)

5Diagnostic/timing check (TC)

6Stop light switch (STP)

8O2 left rear (OXL2)

13A/C clutch relay (ACMG)

18EVAP vapor pressure (PTNK)

KV8-C-28 Digital in 2

KV8-C-27 Digital in 1

OEM-E5

Stock ECU being replaced

5Vehicle speed sensor (SP2+)

11Vehicle speed sensor (SP2-)

5V ref

KV8-B-12 Aux 3

KV8-B-13 Aux 4

KV8-B-1 Injection 1

KV8-B-2 Injection 2

KV8-C-7 Analog in 6

KV8-C-10 Analog in 9

KV8-C-11 Analog in 10

KV8-C-6 Analog in 5

KV8-C-2 Analog in 1

KV8-C-4 Analog in 3

GND

0V sensor

KV8-C-12 Analog in 11

KV8-C-3 Analog in 2

KV8-C-5 Analog in 4

OEM-E6

Stock ECU being replaced

2Sensor supply +5V (VC)

3O2 heater right front (HTR)

4O2 heater left front (HTL)

5Injector 1 (#10)

6Injector 2 (#20)

10Mass air flow (VG)

11O2 right front (OXR1)

12O2 left front (OXL1)

14Coolant temperature (THW)

15Accelerator pedal 1 (VPA)

16Accelerator pedal 2 (VPA2)

17Power ground (E1)

18Sensor ground (E2)

19MAF ground (EVG)

22Intake air temperature (THA)

23Throttle position 1 (VTA)

24Throttle position 2 (VTA2)

KV8-B-3 Injection 3

KV8-B-4 Injection 4

KV8-B-5 Injection 5

KV8-B-6 Injection 6

KV8-D-6 Sync sensor +

KV8-B-26 Ignition 1

KV8-B-27 Ignition 2

KV8-B-28 Ignition 3

KV8-B-14 Aux 5

KV8-B-15 Aux 6

KV8-B-16 Aux 7

KV8-B-17 Aux 8

GND

0V sensor

KV8-D-4 Crank index sensor +

KV8-C-29 Digital in 3

KV8-D-17 Knock 2 +

KV8-D-11 Knock 1 +

OEM-E7

Stock ECU being replaced

1Injector 3 (#30)

2Injector 4 (#40)

3Injector 5 (#50)

4Injector 6 (#60)

10Cam position (G2)

11Ignition 1 (IGT)

12Ignition 2 (IGT2)

13Ignition 3 (IGT3)

17VVT-i OCV - (OCV-)

18VVT-i OCV + (OCV+)

19ETCS throttle clutch - (CL-)

20ETCS throttle clutch + (CL+)

21Power ground (E01)

22Crank position return (NE-)

23Crank position (NE)

25Igniter feedback (IGF)

27Knock sensor 2 (KNK2)

28Knock sensor 1 (KNK1)

KV8

KV8-A

KV8

10Lambda 1 heater −

11Lambda 2 heater −

OEM-E2-25 O2 heater right rear (HTR2)

OEM-E2-26 O2 heater left rear (HTL2)

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

34ECU ground

OEM-E6-5 Injector 1 (#10)

OEM-E6-6 Injector 2 (#20)

OEM-E7-1 Injector 3 (#30)

OEM-E7-2 Injector 4 (#40)

OEM-E7-3 Injector 5 (#50)

OEM-E7-4 Injector 6 (#60)

OEM-E3-5 Fuel pump control (FC)

OEM-E3-6 Check-engine lamp (W)

GND

OEM-E3-4 Fuel pump relay (FPR)

OEM-E4-13 A/C clutch relay (ACMG)

OEM-E6-3 O2 heater right front (HTR)

OEM-E6-4 O2 heater left front (HTL)

OEM-E7-17 VVT-i OCV - (OCV-)

OEM-E7-18 VVT-i OCV + (OCV+)

OEM-E7-19 ETCS throttle clutch - (CL-)

OEM-E7-20 ETCS throttle clutch + (CL+)

OEM-E7-11 Ignition 1 (IGT)

OEM-E7-12 Ignition 2 (IGT2)

OEM-E7-13 Ignition 3 (IGT3)

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

13Analog in 12

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

GND

OEM-E6-15 Accelerator pedal 1 (VPA)

OEM-E6-23 Throttle position 1 (VTA)

OEM-E6-16 Accelerator pedal 2 (VPA2)

OEM-E6-24 Throttle position 2 (VTA2)

OEM-E6-14 Coolant temperature (THW)

OEM-E6-10 Mass air flow (VG)

OEM-E2-24 O2 right rear (OXR2)

OEM-E4-8 O2 left rear (OXL2)

OEM-E6-11 O2 right front (OXR1)

OEM-E6-12 O2 left front (OXL1)

OEM-E6-22 Intake air temperature (THA)

OEM-E4-18 EVAP vapor pressure (PTNK)

0V sensor

GND

OEM-E5-11 Vehicle speed sensor (SP2-)

OEM-E5-5 Vehicle speed sensor (SP2+)

OEM-E7-25 Igniter feedback (IGF)

OEM-E4-2 Starter signal (STA)

OEM-E4-5 Diagnostic/timing check (TC)

OEM-E4-6 Stop light switch (STP)

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 +

20Aux 9–12 14V supply

21Sensor supply Vref1 5.0V

ECU 14V supply

Aux 13–16 14V supply

OEM-E7-23 Crank position (NE)

SP-0V · 3 pins

OEM-E7-10 Cam position (G2)

SP-0V · 3 pins

OEM-E3-10 EFI main relay control (MREL)

OEM-E7-28 Knock sensor 1 (KNK1)

OEM-E3-9 Ignition switch (IGSW)

OEM-E7-27 Knock sensor 2 (KNK2)

Aux 9–12 14V supply

5V ref

SP-14V · 8 pins

SP-GND · 7 pins

SP-0V · 8 pins