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

Ignition power 2

Ignition power 1

GND

MAXXECUMINI-C1-A1 TRIGGER

GND

11–12 no data

MAXXECUMINI-C1-F4 IGN 4

MAXXECUMINI-C1-F3 IGN 3

MAXXECUMINI-C1-F2 IGN 2

MAXXECUMINI-C1-F1 IGN 1

17 no data

MAXXECUMINI-C1-B1 DIN 1 (Hall only)

19 no data

5V ref

22 no data

0V sensor

27 no data

29 no data

MAXXECUMINI-C1-C3 AIN 3 (0-5V)

OEM-A

Stock ECU being replaced

2Ignition power 2

3Ignition power 1

4Power ground 2

5Power ground 1

7Crank position sensor (T1)

8Logic ground 2

9Logic ground 1

11–12 no data

13Ignition coil 4

14Ignition coil 3

15Ignition coil 2

16Ignition coil 1

17 no data

18Vehicle speed sensor

19 no data

21Sensor voltage 1

22 no data

24Sensor ground 1

27 no data

29 no data

30MAP sensor

1 no data

MAXXECUMINI-C1-H3 INJ 4

MAXXECUMINI-C1-H2 INJ 3

MAXXECUMINI-C1-H1 INJ 2

MAXXECUMINI-C1-G3 INJ 1

RLY1-R-OUT Relay contact output (switched +12 V to load)

7 no data

MAXXECUMINI-C1-C1 CLT

9 no data

MAXXECUMINI-C1-B2 DIN 2 (Hall only)

12 no data

14 no data

16 no data

22–24 no data

OEM-B

Stock ECU being replaced

1 no data

2Injector 4

3Injector 3

4Injector 2

5Injector 1

6VTEC solenoid

7 no data

8Coolant temp sensor

9 no data

11VTEC oil pressure switch

12 no data

14 no data

16 no data

22–24 no data

2–3 no data

5–6 no data

10–14 no data

16–17 no data

OEM-D

Stock ECU being replaced

2–3 no data

5–6 no data

10–14 no data

16–17 no data

MAXXECUMINI-C1-C2 IAT

2 no data

GND

6 no data

MAXXECUMINI-C1-G1 GPO 2

10 no data

MAXXECUMINI-C1-E4 CAN H

MAXXECUMINI-C1-G2 GPO 1

23 no data

MAXXECUMINI-C1-E3 CAN L

31 no data

OEM-E

Stock ECU being replaced

1Coolant temp sensor 2

2 no data

3Logic ground 3

6 no data

7Main relay control

10 no data

11CAN H

17Fuel pump relay

23 no data

24CAN L

31 no data

MAXXECUMINI

MAXXECUMINI-C1

MAXXECUMINI

A1TRIGGER

A2TRIGGER GND

B1DIN 1 (Hall only)

B2DIN 2 (Hall only)

B3SENSOR GND

B4SENSOR GND

C1CLT

C2IAT

C3AIN 3 (0-5V)

C4AIN 4 (0-5V)

D4SENSOR GND

E1GPO 3

E2+5V sensor supply

E3CAN L

E4CAN H

F1IGN 1

F2IGN 2

F3IGN 3

F4IGN 4

G1GPO 2

G2GPO 1

G3INJ 1

G4ENGINE GND

H1INJ 2

H2INJ 3

H3INJ 4

H4+12V (ECU power supply)

OEM-A-7 Crank position sensor (T1)

0V sensor

OEM-A-18 Vehicle speed sensor

OEM-B-11 VTEC oil pressure switch

0V sensor

OEM-B-8 Coolant temp sensor

OEM-E-1 Coolant temp sensor 2

OEM-A-30 MAP sensor

TPS-J-SIG Throttle position signal

0V sensor

RLY1-R-COIL- Relay coil negative (ECU low-side driver)

5V ref

OEM-E-24 CAN L

OEM-E-11 CAN H

OEM-A-16 Ignition coil 1

OEM-A-15 Ignition coil 2

OEM-A-14 Ignition coil 3

OEM-A-13 Ignition coil 4

OEM-E-7 Main relay control

OEM-E-17 Fuel pump relay

OEM-B-5 Injector 1

GND

OEM-B-4 Injector 2

OEM-B-3 Injector 3

OEM-B-2 Injector 4

+12V (ECU power supply)

RLY1

RLY1-R

RLY1

INRelay contact input (switched +12 V)

OUTRelay contact output (switched +12 V to load)

COIL+Relay coil positive (switched +12 V)

COIL-Relay coil negative (ECU low-side driver)

SP-14V · 3 pins

OEM-B-6 VTEC solenoid

Relay coil positive (switched +12 V)

MAXXECUMINI-C1-E1 GPO 3

TPS

TPS-J

TPS

GNDSensor ground

SIGThrottle position signal

VCC5V supply in

0V sensor

MAXXECUMINI-C1-C4 AIN 4 (0-5V)

5V supply in

SP-5V1 · 5 pins

SP-0V · 7 pins

SP-GND · 7 pins

SP-14V · 6 pins

SP-5V · 5 pins