Pinswap: ECU harness builder

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Schematic Connections Pins Layout Parts

Build sheet (PDF)Wiring workbook (Excel)Cut list (CSV)Parts list (CSV)Pin map (CSV)Findings (CSV)Harness file (JSON)

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Stock ECU being replaced

ECU power +14V (main relay)

KV8-C-28 Digital in 2

KV8-B-10 Aux 1

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-29 Digital in 3

KV8-C-30 Digital in 4

KV8-B-14 Aux 5

KV8-C-31 Digital in 5

OEM-1

Stock ECU being replaced

BECU power +14V (main relay)

CStart signal

EMalfunction indicator lamp (MIL)

GIgnition 1 (coils 1+4, wasted spark)

HIgnition 2 (coils 2+3, wasted spark)

JA/C relay

MVehicle speed

PPower steering pressure switch

QA/C request

RCooling fan relay

VNeutral/clutch switch

GND

GND

GND

GND

KV8-D-4 Crank index sensor +

0V sensor

KV8-D-6 Sync sensor +

KV8-B-13 Aux 4

5V ref

KV8-C-3 Analog in 2

KV8-C-4 Analog in 3

KV8-C-2 Analog in 1

KV8-C-6 Analog in 5

KV8-C-5 Analog in 4

KV8-B-11 Aux 2

KV8-B-15 Aux 6

KV8-B-16 Aux 7

KV8-B-1 Injection 1

KV8-B-2 Injection 2

KV8-B-17 Aux 8

KV8-B-12 Aux 3

KV8-B-3 Injection 3

KV8-B-4 Injection 4

OEM-2

Stock ECU being replaced

APower ground

BPower ground

CPower ground

DPower ground

ECrank position (CAS NE)

FMAF ground

GCam position (CAS G)

ITachometer output

K+5V sensor supply

MThrottle position (TPS)

NO2 sensor

OMass air flow (MAF)

PIntake air temperature (IAT)

QCoolant temperature (ECT)

RPRC solenoid (fuel pressure regulator)

SCondenser fan relay

TFuel pump relay

UInjector 1

VInjector 2

WISC solenoid

XEvap purge solenoid

YInjector 3

ZInjector 4

KV8

KV8-A

KV8

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-2-U Injector 1

OEM-2-V Injector 2

OEM-2-Y Injector 3

OEM-2-Z Injector 4

GND

OEM-1-E Malfunction indicator lamp (MIL)

OEM-2-R PRC solenoid (fuel pressure regulator)

OEM-2-X Evap purge solenoid

OEM-2-I Tachometer output

OEM-1-R Cooling fan relay

OEM-2-S Condenser fan relay

OEM-2-T Fuel pump relay

OEM-2-W ISC solenoid

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

25Analog sensor 0V reference

26ECU ground

27Digital in 1

28Digital in 2

29Digital in 3

30Digital in 4

31Digital in 5

GND

OEM-2-O Mass air flow (MAF)

OEM-2-M Throttle position (TPS)

OEM-2-N O2 sensor

OEM-2-Q Coolant temperature (ECT)

OEM-2-P Intake air temperature (IAT)

0V sensor

0V sensor

GND

OEM-1-M Vehicle speed

OEM-1-C Start signal

OEM-1-P Power steering pressure switch

OEM-1-Q A/C request

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)

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)

OEM-2-F MAF ground (via SP-0V)

OEM-2-G Cam position (CAS G)

OEM-2-F MAF ground (via SP-0V)

OEM-1-J A/C relay

Aux 9–12 14V supply

5V ref

SP-GND · 9 pins

SP-14V · 5 pins

SP-0V · 6 pins