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

KV8-B-14 Aux 5

KV8-C-28 Digital in 2

KV8-B-17 Aux 8

KV8-B-15 Aux 6

KV8-C-29 Digital in 3

KV8-C-30 Digital in 4

KV8-C-27 Digital in 1

KV8-C-31 Digital in 5

KV8-B-16 Aux 7

OEM-1

Stock ECU being replaced

ACooling fan relay (low-side)

BA/C condenser fan relay

CStarter input (12V while cranking)

ECheck engine light (MIL)

GA/C clutch relay

KA/C pressure switch (A/C request)

LClutch switch

MVehicle speed sensor (VSS)

QBrake switch

UFuel pump relay (low-side)

KV8-C-2 Analog in 1

KV8-C-7 Analog in 6

KV8-C-8 Analog in 7

KV8-C-3 Analog in 2

KV8-C-4 Analog in 3

KV8-C-5 Analog in 4

5V ref

KV8-C-10 Analog in 9

KV8-C-9 Analog in 8

KV8-C-32 Digital in 6

KV8-A-10 Lambda 1 heater −

KV8-C-6 Analog in 5

0V sensor

KV8-C-33 Digital in 7

OEM-3

Stock ECU being replaced

BMAF sensor input

CFront O2 sensor input

DRear O2 sensor input

FThrottle position (TPS)

GEngine coolant temp (CLT)

HEGR boost sensor

I+5V sensor reference

JEGR valve position sensor

KIntake air temp (IAT)

LIdle switch (closed throttle)

MFront O2 heater control

NEGR boost sensor (2nd channel)

OSensor ground

PPower steering pressure switch

GND

ECU power +12V (main relay)

GND

KV8-D-4 Crank index sensor +

KV8-D-6 Sync sensor +

0V sensor

KV8-B-10 Aux 1

GND

KV8-B-26 Ignition 1

KV8-B-11 Aux 2

KV8-B-12 Aux 3

KV8-B-13 Aux 4

KV8-B-27 Ignition 2

KV8-A-11 Lambda 2 heater −

KV8-B-1 Injection 1

KV8-B-2 Injection 2

KV8-B-3 Injection 3

KV8-B-4 Injection 4

OEM-4

Stock ECU being replaced

AChassis ground

BECU power +12V (main relay)

CChassis ground

DChassis ground

ECrank position (CKP) sensor

GCAS SGC (cam sync)

HCrank pickup timing ground (CKP gnd)

JPRC solenoid (FPR control)

KChassis ground

NIgnition coil trigger (cyl 1&4)

OEGR vent solenoid

PEGR vacuum solenoid

QIdle air control (IAC) valve

RIgnition coil trigger (cyl 2&3)

TEVAP purge solenoid

UInjector 1 (cyl 1)

VInjector 2 (cyl 2)

WInjector 3 (cyl 3)

XInjector 4 (cyl 4)

KV8

KV8-A

KV8

10Lambda 1 heater −

11Lambda 2 heater −

OEM-3-M Front O2 heater control

OEM-4-T EVAP purge solenoid

KV8-B

KV8

1Injection 1

2Injection 2

3Injection 3

4Injection 4

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-4-U Injector 1 (cyl 1)

OEM-4-V Injector 2 (cyl 2)

OEM-4-W Injector 3 (cyl 3)

OEM-4-X Injector 4 (cyl 4)

GND

OEM-4-J PRC solenoid (FPR control)

OEM-4-O EGR vent solenoid

OEM-4-P EGR vacuum solenoid

OEM-4-Q Idle air control (IAC) valve

OEM-1-B A/C condenser fan relay

OEM-1-G A/C clutch relay

OEM-1-U Fuel pump relay (low-side)

OEM-1-E Check engine light (MIL)

OEM-4-N Ignition coil trigger (cyl 1&4)

OEM-4-R Ignition coil trigger (cyl 2&3)

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

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

GND

OEM-3-B MAF sensor input

OEM-3-F Throttle position (TPS)

OEM-3-G Engine coolant temp (CLT)

OEM-3-H EGR boost sensor

OEM-3-N EGR boost sensor (2nd channel)

OEM-3-C Front O2 sensor input

OEM-3-D Rear O2 sensor input

OEM-3-K Intake air temp (IAT)

OEM-3-J EGR valve position sensor

0V sensor

GND

OEM-1-M Vehicle speed sensor (VSS)

OEM-1-C Starter input (12V while cranking)

OEM-1-K A/C pressure switch (A/C request)

OEM-1-L Clutch switch

OEM-1-Q Brake switch

OEM-3-L Idle switch (closed throttle)

OEM-3-P Power steering pressure switch

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)

20Aux 9–12 14V supply

21Sensor supply Vref1 5.0V

ECU 14V supply

Aux 13–16 14V supply

OEM-4-E Crank position (CKP) sensor

SP-0V · 2 pins

OEM-4-G CAS SGC (cam sync)

SP-0V · 2 pins

OEM-1-A Cooling fan relay (low-side)

Aux 9–12 14V supply

5V ref

SP-GND · 9 pins

SP-0V · 7 pins

SP-14V · 5 pins