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

5V ref

KV8-C-31 Digital in 5

KV8-C-28 Digital in 2

KV8-D-4 Crank index sensor +

0V sensor

KV8-C-3 Analog in 2

KV8-C-2 Analog in 1

KV8-C-29 Digital in 3

KV8-D-6 Sync sensor +

0V sensor

KV8-C-5 Analog in 4

KV8-C-6 Analog in 5

KV8-C-7 Analog in 6

KV8-C-30 Digital in 4

0V sensor

KV8-C-4 Analog in 3

0V sensor

OEM-C84

Stock ECU being replaced

1Sensor supply +5V (VCC)

3OD direct-clutch speed sensor (NCO-)

4No.2 speed sensor (SP2-)

5Crank position (NE)

6Crank sensor return (NE-)

7Throttle position (VTA1)

8Manifold pressure (PIM)

9No.2 speed sensor (SP2+)

10Cam position 1 (G1)

11Cam 1 return (G1-)

12TRAC throttle position (VTA2)

13O2 sensor (OX1)

14Intake air temperature (THA)

15OD direct-clutch speed sensor (NCO+)

17Cam 2 return (G2-)

20Coolant temperature (THW)

22Sensor ground (E2)

KV8-C-32 Digital in 6

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

KV8-B-13 Aux 4

KV8-A-11 Lambda 2 heater −

KV8-C-18 Digital in 9

KV8-C-9 Analog in 8

KV8-C-33 Digital in 7

KV8-D-19 Analog output 0–5V

KV8-C-23 Digital in 14

GND

OEM-C85

Stock ECU being replaced

1Slave engine speed (NEO)

2EFI main relay control (M-REL)

3Check-engine lamp (W)

4Fuel pump control (FPC)

5Diagnostic test 1 (TE1)

6Timing retard (TR)

10Fuel pump diagnostic (DI)

11Slave TRAC throttle position (VTO2)

14ABS active (MT only)

16Power ground (E1)

KV8-C-10 Analog in 9

KV8-C-14 Analog in 13

KV8-B-14 Aux 5

KV8-C-22 Digital in 13

KV8-C-19 Digital in 10

KV8-B-4 Injection 4

KV8-D-15 Ignition switch input

KV8-C-20 Digital in 11

KV8-C-21 Digital in 12

KV8-C-27 Digital in 1

KV8-C-8 Analog in 7

KV8-C-11 Analog in 10

KV8-C-12 Analog in 11

KV8-C-13 Analog in 12

KV8-C-15 Analog in 14

EFI main relay power (+B)

EFI main relay power (+B1)

KV8-C-16 Analog in 15

KV8-C-24 Analog in 16

OEM-C86

Stock ECU being replaced

1Diagnostic test terminal (TT)

2A/T low-gear indicator (L)

5A/C clutch relay (ACMG)

6A/T overdrive disable 2 (OD2)

7A/T overdrive disable 1 (OD1)

8Cat temp warning light (EGW)

9Ignition switch (IGSW)

10A/T 2nd-gear indicator (2)

11Diagnostic test 2 (TE2)

12No.1 speed sensor (SP1)

13Cat temperature sensor (CCO)

17A/T throttle position (L3)

18A/T throttle position (L2)

19A/T throttle position (L1)

20A/C request (A/C)

22EFI main relay power (+B)

23EFI main relay power (+B1)

25Stop light switch (STP)

28Electrical load sense (ELS)

KV8-A-10 Lambda 1 heater −

KV8-D-17 Knock 2 +

KV8-D-11 Knock 1 +

KV8-B-6 Injection 6

KV8-B-3 Injection 3

KV8-B-2 Injection 2

KV8-B-1 Injection 1

KV8-B-15 Aux 6

KV8-C-34 Digital in 8

KV8-B-28 Ignition 3

KV8-B-27 Ignition 2

KV8-B-17 Aux 8

KV8-B-12 Aux 3

KV8-B-11 Aux 2

KV8-B-10 Aux 1

KV8-B-16 Aux 7

KV8-B-26 Ignition 1

KV8-B-29 Ignition 4

KV8-B-5 Injection 5

GND

KV8-B-31 Ignition 6

KV8-B-30 Ignition 5

GND

OEM-C88

Stock ECU being replaced

3O2 heater (HT)

4Knock sensor 2 (KNK2, rear)

5Knock sensor 1 (KNK1, front)

7EVAP purge VSV

8Injector 3 (#30, cyl 2&6)

9Injector 2 (#20, cyl 3&5)

10Injector 1 (#10, cyl 1&4)

11A/T shift solenoid 1 (S1)

12Igniter feedback (IGF)

15Ignition 3 (IGT3)

16Ignition 2 (IGT2)

17A/T shift solenoid 2 (S2)

20ISC stepper coil 4 (ISCV4)

21ISC stepper coil 3 (ISCV3)

22ISC stepper coil 2 (ISCV2)

23ISC stepper coil 1 (ISCV1)

24Ignition 1 (IGT1)

26Ignition 4 (IGT4)

27A/T lock-up solenoid (S3)

28Power ground (E11)

29Ignition 6 (IGT6)

30Ignition 5 (IGT5)

33Power ground (E02)

34Power ground (E01)

KV8

KV8-A

KV8

10Lambda 1 heater −

11Lambda 2 heater −

OEM-C88-3 O2 heater (HT)

OEM-C85-4 Fuel pump control (FPC)

KV8-B

KV8

1Injection 1

2Injection 2

3Injection 3

4Injection 4

5Injection 5

6Injection 6

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-C88-10 Injector 1 (#10, cyl 1&4)

OEM-C88-9 Injector 2 (#20, cyl 3&5)

OEM-C88-8 Injector 3 (#30, cyl 2&6)

OEM-C86-8 Cat temp warning light (EGW)

OEM-C88-27 A/T lock-up solenoid (S3)

OEM-C88-7 EVAP purge VSV

GND

OEM-C88-22 ISC stepper coil 2 (ISCV2)

OEM-C88-21 ISC stepper coil 3 (ISCV3)

OEM-C88-20 ISC stepper coil 4 (ISCV4)

OEM-C85-3 Check-engine lamp (W)

OEM-C86-5 A/C clutch relay (ACMG)

OEM-C88-11 A/T shift solenoid 1 (S1)

OEM-C88-23 ISC stepper coil 1 (ISCV1)

OEM-C88-17 A/T shift solenoid 2 (S2)

OEM-C88-24 Ignition 1 (IGT1)

OEM-C88-16 Ignition 2 (IGT2)

OEM-C88-15 Ignition 3 (IGT3)

OEM-C88-26 Ignition 4 (IGT4)

OEM-C88-30 Ignition 5 (IGT5)

OEM-C88-29 Ignition 6 (IGT6)

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-C84-8 Manifold pressure (PIM)

OEM-C84-7 Throttle position (VTA1)

OEM-C84-20 Coolant temperature (THW)

OEM-C84-12 TRAC throttle position (VTA2)

OEM-C84-13 O2 sensor (OX1)

OEM-C84-14 Intake air temperature (THA)

OEM-C86-13 Cat temperature sensor (CCO)

OEM-C85-6 Timing retard (TR)

OEM-C86-1 Diagnostic test terminal (TT)

OEM-C86-17 A/T throttle position (L3)

OEM-C86-18 A/T throttle position (L2)

OEM-C86-19 A/T throttle position (L1)

OEM-C86-2 A/T low-gear indicator (L)

OEM-C86-20 A/C request (A/C)

OEM-C86-25 Stop light switch (STP)

0V sensor

OEM-C85-5 Diagnostic test 1 (TE1)

OEM-C86-7 A/T overdrive disable 1 (OD1)

OEM-C86-10 A/T 2nd-gear indicator (2)

OEM-C86-11 Diagnostic test 2 (TE2)

OEM-C86-6 A/T overdrive disable 2 (OD2)

OEM-C85-14 ABS active (MT only)

OEM-C86-28 Electrical load sense (ELS)

0V sensor

GND

OEM-C86-12 No.1 speed sensor (SP1)

OEM-C84-4 No.2 speed sensor (SP2-)

OEM-C84-9 No.2 speed sensor (SP2+)

OEM-C84-15 OD direct-clutch speed sensor (NCO+)

OEM-C84-3 OD direct-clutch speed sensor (NCO-)

OEM-C85-1 Slave engine speed (NEO)

OEM-C85-10 Fuel pump diagnostic (DI)

OEM-C88-12 Igniter feedback (IGF)

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-C84-5 Crank position (NE)

SP-0V · 4 pins

OEM-C84-10 Cam position 1 (G1)

SP-0V · 4 pins

OEM-C85-2 EFI main relay control (M-REL)

OEM-C88-5 Knock sensor 1 (KNK1, front)

OEM-C86-9 Ignition switch (IGSW)

OEM-C88-4 Knock sensor 2 (KNK2, rear)

OEM-C85-11 Slave TRAC throttle position (VTO2)

Aux 9–12 14V supply

5V ref

SP-0V · 9 pins

SP-GND · 9 pins

SP-14V · 6 pins