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-3 Injection 3

KV8-B-4 Injection 4

KV8-B-5 Injection 5

KV8-B-6 Injection 6

KV8-B-8 Injection 8

GND

KV8-D-6 Sync sensor +

KV8-B-26 Ignition 1

KV8-B-27 Ignition 2

KV8-B-28 Ignition 3

KV8-B-7 Injection 7

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-12 Analog in 11

KV8-C-30 Digital in 4

KV8-D-17 Knock 2 +

KV8-D-11 Knock 1 +

KV8-D-13 Shield (crank/cam/knock) (via SP-SHD)

GND

OEM-B74

Stock ECU being replaced

1Injector 3 (#30)

2Injector 4 (#40)

3Injector 5 (#50)

4Injector 6 (#60)

5Intake air bypass VSV (VSV1)

9ETCS-i ground (ME01)

10Cam position (G2)

11Ignition 1 (IGT, cyl 1&6)

12Ignition 2 (IGT2, cyl 5&2)

13Ignition 3 (IGT3, cyl 3&4)

15Wastegate VSV (PMC)

17VVT-i OCV - (OCV-)

18VVT-i OCV + (OCV+)

19ETCS-i clutch - (CL-)

20ETCS-i clutch + (CL+)

21Power ground (E01)

22Crank/cam sensor return (NE-)

23Crank position (NE+)

24Neutral/park switch (NSW)

25Igniter verification (IGF)

27Knock sensor 2 (KNK2, rear)

28Knock sensor 1 (KNK1, front)

30ETCS-i motor shield (GEO1)

31Power ground (E02)

5V ref

KV8-A-10 Lambda 1 heater −

KV8-B-1 Injection 1

KV8-B-2 Injection 2

KV8-C-13 Analog in 12

KV8-C-2 Analog in 1

KV8-C-8 Analog in 7

KV8-C-9 Analog in 8

KV8-C-7 Analog in 6

KV8-C-3 Analog in 2

KV8-C-5 Analog in 4

GND

0V sensor

KV8-C-23 Digital in 14

KV8-C-22 Digital in 13

KV8-C-10 Analog in 9

KV8-C-4 Analog in 3

KV8-C-6 Analog in 5

OEM-B75

Stock ECU being replaced

2Sensor power (VC)

4O2 sensor heater (HT)

5Injector 1 (#10)

6Injector 2 (#20)

8Main oil pressure switch (MOPS)

9Manifold pressure (PIM)

10Mass air flow (VG)

12O2 sensor (OX)

14Coolant temperature (THW)

15Accelerator pedal 1 (VPA)

16Accelerator pedal 2 (VPA2)

17Power ground (E1)

18Sensor ground (E2)

19MAF ground (EVG)

20A/T 2nd-gear indicator (2)

21A/T 1st-gear indicator (L)

22Intake air temperature (THA)

23Throttle position 1 (VTA)

24Throttle position 2 (VTA2)

KV8-B-11 Aux 2

KV8-B-12 Aux 3

KV8-B-13 Aux 4

KV8-C-32 Digital in 6

KV8-C-29 Digital in 3

KV8-A-11 Lambda 2 heater −

KV8-C-31 Digital in 5

KV8-C-28 Digital in 2

KV8-C-11 Analog in 10

OEM-B76

Stock ECU being replaced

1A/T shift solenoid 1 (S1)

2A/T shift solenoid 2 (S2)

3A/T shift solenoid 3 (S3)

4OD direct-clutch speed (NCO+)

5No.2 speed sensor (SP2+)

6A/T shift solenoid 4 (S4)

10OD direct-clutch speed (NCO-)

11No.2 speed sensor return (SP2-)

17A/T oil temperature (OIL)

KV8-C-14 Analog in 13

KV8-C-24 Analog in 16

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

KV8-C-15 Analog in 14

KV8-C-16 Analog in 15

KV8-C-33 Digital in 7

KV8-C-34 Digital in 8

KV8-C-27 Digital in 1

KV8-C-18 Digital in 9

OEM-B77

Stock ECU being replaced

1A/C request (AC)

2Starter signal (STA)

13A/C clutch relay (ACMG)

14A/T shift down (SFTD)

16A/T reverse indicator (R)

18Rear right wheel speed (RRO)

19Rear left wheel speed (RLO)

25No.1 speed sensor (SPD)

27Road speed (RSPD)

KV8-C-19 Digital in 10

ETCS-i power (+BM)

EFI main relay power (+B2)

KV8-D-15 Ignition switch input

KV8-B-10 Aux 1

EFI main relay power (+B)

0V sensor

OEM-B78

Stock ECU being replaced

4Fuel pump diagnostic (DI)

7ETCS-i power (+BM)

8EFI main relay power (+B2)

9Ignition switch (IGSW)

10EFI main relay control (M-REL)

16EFI main relay power (+B)

22Switch ground (EC)

KV8-C-20 Digital in 11

KV8-C-21 Digital in 12

OEM-B79

Stock ECU being replaced

7Front right wheel speed (FRO)

8Front left wheel speed (FLO)

KV8

KV8-A

KV8

10Lambda 1 heater −

11Lambda 2 heater −

OEM-B75-4 O2 sensor heater (HT)

OEM-B76-6 A/T shift solenoid 4 (S4)

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-B75-5 Injector 1 (#10)

OEM-B75-6 Injector 2 (#20)

OEM-B74-1 Injector 3 (#30)

OEM-B74-2 Injector 4 (#40)

OEM-B74-3 Injector 5 (#50)

OEM-B74-4 Injector 6 (#60)

OEM-B74-15 Wastegate VSV (PMC)

OEM-B74-5 Intake air bypass VSV (VSV1)

GND

OEM-B78-10 EFI main relay control (M-REL)

OEM-B76-1 A/T shift solenoid 1 (S1)

OEM-B76-2 A/T shift solenoid 2 (S2)

OEM-B76-3 A/T shift solenoid 3 (S3)

OEM-B74-17 VVT-i OCV - (OCV-)

OEM-B74-18 VVT-i OCV + (OCV+)

OEM-B74-19 ETCS-i clutch - (CL-)

OEM-B74-20 ETCS-i clutch + (CL+)

OEM-B74-11 Ignition 1 (IGT, cyl 1&6)

OEM-B74-12 Ignition 2 (IGT2, cyl 5&2)

OEM-B74-13 Ignition 3 (IGT3, cyl 3&4)

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

14Analog in 13

15Analog in 14

16Analog in 15

17Analog sensor 0V reference

18Digital in 9

19Digital in 10

20Digital in 11

21Digital in 12

22Digital in 13

23Digital in 14

24Analog in 16

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-B75-9 Manifold pressure (PIM)

OEM-B75-15 Accelerator pedal 1 (VPA)

OEM-B75-23 Throttle position 1 (VTA)

OEM-B75-16 Accelerator pedal 2 (VPA2)

OEM-B75-24 Throttle position 2 (VTA2)

OEM-B75-14 Coolant temperature (THW)

OEM-B75-10 Mass air flow (VG)

OEM-B75-12 O2 sensor (OX)

OEM-B75-22 Intake air temperature (THA)

OEM-B76-17 A/T oil temperature (OIL)

OEM-B74-24 Neutral/park switch (NSW)

OEM-B75-8 Main oil pressure switch (MOPS)

OEM-B77-1 A/C request (AC)

OEM-B77-14 A/T shift down (SFTD)

OEM-B77-16 A/T reverse indicator (R)

0V sensor

OEM-B77-27 Road speed (RSPD)

OEM-B78-4 Fuel pump diagnostic (DI)

OEM-B79-7 Front right wheel speed (FRO)

OEM-B79-8 Front left wheel speed (FLO)

OEM-B75-21 A/T 1st-gear indicator (L)

OEM-B75-20 A/T 2nd-gear indicator (2)

OEM-B77-2 Starter signal (STA)

0V sensor

GND

OEM-B77-25 No.1 speed sensor (SPD)

OEM-B76-11 No.2 speed sensor return (SP2-)

OEM-B76-5 No.2 speed sensor (SP2+)

OEM-B74-25 Igniter verification (IGF)

OEM-B76-10 OD direct-clutch speed (NCO-)

OEM-B76-4 OD direct-clutch speed (NCO+)

OEM-B77-18 Rear right wheel speed (RRO)

OEM-B77-19 Rear left wheel speed (RLO)

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 +

13Shield (crank/cam/knock)

15Ignition switch input

17Knock 2 +

20Aux 9–12 14V supply

21Sensor supply Vref1 5.0V

ECU 14V supply

Aux 13–16 14V supply

OEM-B74-23 Crank position (NE+)

SP-0V · 4 pins

OEM-B74-10 Cam position (G2)

SP-0V · 4 pins

OEM-B77-13 A/C clutch relay (ACMG)

OEM-B74-28 Knock sensor 1 (KNK1, front)

OEM-B74-30 ETCS-i motor shield (GEO1) (via SP-SHD)

OEM-B78-9 Ignition switch (IGSW)

OEM-B74-27 Knock sensor 2 (KNK2, rear)

Aux 9–12 14V supply

5V ref

SP-GND · 9 pins

SP-SHD · 3 pins

SP-0V · 9 pins

SP-14V · 7 pins