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.

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Stock ECU being replaced

MAXXECUMINI-C1-G3 INJ 1

MAXXECUMINI-C1-H3 INJ 4

5V ref

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

MAXXECUMINI-C1-D2 TPS

MAXXECUMINI-C1-H3 INJ 4

5V ref

PCM power feed (VPWR, fused)

0V sensor

MAXXECUMINI-C1-C1 CLT

MAXXECUMINI-C1-B1 DIN 1 (Hall only)

MAXXECUMINI-C1-H1 INJ 2

5V ref

MAXXECUMINI-C1-D3 GND Shield (via SP-SHD)

0V sensor

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

MAXXECUMINI-C1-H2 INJ 3

MAXXECUMINI-C1-C2 IAT

MAXXECUMINI-C1-B2 DIN 2 (Hall only)

0V sensor

MAXXECUMINI-C1-H2 INJ 3

MAXXECUMINI-C1-H1 INJ 2

0V sensor

MAXXECUMINI-C1-A1 TRIGGER

MAXXECUMINI-C1-G2 GPO 1

MAXXECUMINI-C1-G1 GPO 2

MAXXECUMINI-C1-E1 GPO 3

MAXXECUMINI-C1-D1 GPO 8/TACHO

MAXXECUMINI-C1-F1 IGN 1

MAXXECUMINI-C1-F2 IGN 2

MAXXECUMINI-C1-F3 IGN 3

MAXXECUMINI-C1-F4 IGN 4

OEM-C175E

Stock ECU being replaced

1Fuel injector driver 1 (INJ 1)

2Fuel injector driver 5 (INJ 5)

3Fuel injector driver 4 (INJ 4)

8Electronic throttle control reference (ETCREF)

9Throttle position positive slope (TP2-PS)

10Throttle position negative slope (TP1-NS)

16Fuel injector driver 8 (INJ 8)

17Buffered power supply sensors (VBPWR)

18PCM power feed (VPWR, fused)

23Electronic throttle control return (ETCRTN)

27Intake air temperature (IAT)

30Engine oil level switch (EOL)

31Fuel injector driver 6 (INJ 6)

34Voltage reference engine (VREF)

39Crankshaft sensor shield/drain

40VR sensor return (VRSRTN)

44Intake manifold monitor (IMM)

46Fuel injector driver 3 (INJ 3)

47Cylinder head temperature (CHT)

48Oil pressure switch

49Signal return engine #2

52Knock sensor 1 bank 1 return (KS1−)

54VR sensor return (VRSRTN)

61Fuel injector driver 7 (INJ 7)

62Fuel injector driver 2 (INJ 2)

67Knock sensor 2 bank 1 return (KS2−)

69Crankshaft position return (CKP−)

70Crankshaft position (CKP+)

78Heater O2 post-cat 1st (HTR12)

79Heater O2 pre-cat 1st (HTR11)

83Heater O2 post-cat 2nd (HTR22)

84Heater O2 pre-cat 2nd (HTR21)

87Ignition coil on plug G (COP-G)

88Ignition coil on plug F (COP-F)

89Ignition coil on plug E (COP-E)

90Ignition coil on plug H (COP-H)

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)

D1GPO 8/TACHO

D2TPS

D3GND Shield

D4SENSOR GND

E1GPO 3

E2+5V sensor supply

F1IGN 1

F2IGN 2

F3IGN 3

F4IGN 4

G1GPO 2

G2GPO 1

G3INJ 1

H1INJ 2

H2INJ 3

H3INJ 4

H4+12V (ECU power supply)

OEM-C175E-70 Crankshaft position (CKP+)

0V sensor

OEM-C175E-30 Engine oil level switch (EOL)

OEM-C175E-48 Oil pressure switch

0V sensor

OEM-C175E-27 Intake air temperature (IAT)

OEM-C175E-47 Cylinder head temperature (CHT)

OEM-C175E-44 Intake manifold monitor (IMM)

OEM-C175E-9 Throttle position positive slope (TP2-PS)

OEM-C175E-84 Heater O2 pre-cat 2nd (HTR21)

OEM-C175E-10 Throttle position negative slope (TP1-NS)

OEM-C175E-39 Crankshaft sensor shield/drain (via SP-SHD)

0V sensor

OEM-C175E-83 Heater O2 post-cat 2nd (HTR22)

5V ref

OEM-C175E-87 Ignition coil on plug G (COP-G)

OEM-C175E-88 Ignition coil on plug F (COP-F)

OEM-C175E-89 Ignition coil on plug E (COP-E)

OEM-C175E-90 Ignition coil on plug H (COP-H)

OEM-C175E-79 Heater O2 pre-cat 1st (HTR11)

OEM-C175E-78 Heater O2 post-cat 1st (HTR12)

INJ 1 · 2 pins

Fuel injector driver 2 (INJ 2) · 2 pins

INJ 3 · 2 pins

Fuel injector driver 4 (INJ 4) · 2 pins

+12V (ECU power supply)

SP-5V1 · 5 pins

SP-SHD · 3 pins

SP-0V · 12 pins

SP-14V · 3 pins