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

ECU power +14V (main relay)

KV8-D-15 Ignition switch input

KV8-B-15 Aux 6

KV8-B-26 Ignition 1

KV8-B-27 Ignition 2

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

KV8-C-27 Digital in 1

KV8-C-28 Digital in 2

KV8-C-29 Digital in 3

KV8-C-30 Digital in 4

KV8-C-31 Digital in 5

KV8-B-14 Aux 5

KV8-C-32 Digital in 6

KV8-C-33 Digital in 7

KV8-C-34 Digital in 8

OEM-1

Stock ECU being replaced

BECU power +14V (main relay)

CIgnition on (+12V)

EMalfunction indicator lamp (MIL)

GIgnition 1 (coils 1+4, wasted spark)

HIgnition 2 (coils 2+3, wasted spark)

JA/C relay

KDiagnostic mode switch (TEN)

NWide-open throttle switch

OStop light switch

PPower steering pressure switch

QA/C thermo switch

RA/C extra cooling fan relay

SHeater control switch (A/C request)

UTail fuse / TNS (parking lamp +12V)

VNeutral/clutch switch

GND

0V sensor

KV8-D-4 Crank index sensor +

F no data

KV8-D-6 Sync sensor +

KV8-B-10 Aux 1

5V ref

KV8-C-18 Digital in 9

KV8-C-4 Analog in 3

KV8-C-5 Analog in 4

KV8-C-3 Analog in 2

KV8-C-6 Analog in 5

KV8-C-2 Analog in 1

KV8-B-1 Injection 1

KV8-B-2 Injection 2

KV8-B-16 Aux 7

KV8-B-17 Aux 8

KV8-B-3 Injection 3

KV8-B-4 Injection 4

OEM-2

Stock ECU being replaced

APower ground

BPower ground

CSensor ground (E2)

DSensor ground (E2)

ECrank position (CAS NE)

F no data

GCam position (CAS G)

ITachometer output

K+5V sensor supply

LIdle switch (TPS)

MTPS signal (A/T)

NO2 sensor

OAir flow meter (AFM)

PIntake air temperature (IAT)

QCoolant temperature (ECT)

UInjector 1 & 3 (batch)

VInjector 2 & 4 (batch)

WIdle speed control (ISC) valve

XPurge solenoid valve

YInjector 3 (California sequential)

ZInjector 4 (California sequential)

KV8

KV8-A

KV8

KV8-B

KV8

1Injection 1

2Injection 2

3Injection 3

4Injection 4

9ECU ground

10Aux 1

14Aux 5

15Aux 6

16Aux 7

17Aux 8

26Ignition 1

27Ignition 2

34ECU ground

OEM-2-U Injector 1 & 3 (batch)

OEM-2-V Injector 2 & 4 (batch)

OEM-2-Y Injector 3 (California sequential)

OEM-2-Z Injector 4 (California sequential)

GND

OEM-2-I Tachometer output

OEM-1-R A/C extra cooling fan relay

OEM-1-E Malfunction indicator lamp (MIL)

OEM-2-W Idle speed control (ISC) valve

OEM-2-X Purge solenoid valve

OEM-1-G Ignition 1 (coils 1+4, wasted spark)

OEM-1-H Ignition 2 (coils 2+3, wasted spark)

GND

KV8-C

KV8

1ECU ground

2Analog in 1

3Analog in 2

4Analog in 3

5Analog in 4

6Analog in 5

17Analog sensor 0V reference

18Digital in 9

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-2-Q Coolant temperature (ECT)

OEM-2-O Air flow meter (AFM)

OEM-2-M TPS signal (A/T)

OEM-2-N O2 sensor

OEM-2-P Intake air temperature (IAT)

0V sensor

OEM-2-L Idle switch (TPS)

0V sensor

GND

OEM-1-K Diagnostic mode switch (TEN)

OEM-1-N Wide-open throttle switch

OEM-1-O Stop light switch

OEM-1-P Power steering pressure switch

OEM-1-Q A/C thermo switch

OEM-1-S Heater control switch (A/C request)

OEM-1-U Tail fuse / TNS (parking lamp +12V)

OEM-1-V Neutral/clutch 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)

15Ignition switch input

20Aux 9–12 14V supply

21Sensor supply Vref1 5.0V

ECU 14V supply

Aux 13–16 14V supply

OEM-2-E Crank position (CAS NE)

SP-0V · 2 pins

OEM-2-G Cam position (CAS G)

SP-0V · 2 pins

OEM-1-J A/C relay

OEM-1-C Ignition on (+12V)

Aux 9–12 14V supply

5V ref

SP-GND · 7 pins

SP-0V · 7 pins

SP-14V · 5 pins