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
ME221-C1-16 LSU HEATER -VE
ME221-C1-69 LOW SIDE 5
ME221-C1-73 LOW SIDE 1
ME221-C1-42 LOW SIDE RELAY 12
OEM-E11
Stock ECU being replaced
7O2 sensor heater (bank unconfirmed)
8O2 sensor heater (bank unconfirmed)
19VVT oil-control valve RH (OCR+)
28VVT oil-control valve RH (OCR−)
ME221-C1-72 LOW SIDE RELAY 13
OEM-E12
Stock ECU being replaced
12Throttle magnetic clutch + (CL+)
5V ref
ME221-C1-39 LOW SIDE 6
ME221-C1-37 LOW SIDE RELAY 11
ME221-C1-63 INJECTOR 1
ME221-C1-4 INJECTOR 2
ME221-C1-43 LOW SIDE RELAY 14
ME221-C1-26 ANA VOLT 1
ME221-C1-56 ANA VOLT 2
ME221-C1-86 ANA TEMP 1
ME221-C1-23 CAM A VR-
GND
0V sensor
0V sensor
ME221-C1-18 ANA VOLT 4
ME221-C1-17 ANA VOLT 3
ME221-C1-57 ANA TEMP 2
SP-0V · 2 pins
OEM-E13
Stock ECU being replaced
2+5V sensor reference (VC)
3O2 sensor heater (bank unconfirmed)
4O2 sensor heater (bank unconfirmed)
5Injector 1 (cyl 1)
6Injector 2 (cyl 2)
8Throttle magnetic clutch − (CL−)
10MAF signal (VG)
13Throttle position sensor 1 (VTA)
14Engine coolant temp (THW)
16VVT position sensor LH (VVL+)
17ECU ground (E1)
18Sensor ground (E2)
19MAF ground (EVG)
20Throttle position sensor 2 (VTA2)
21Accelerator pedal position 1 (VPA)
22Intake air temp (THA)
24VVT position sensor LH (VVL−)
ME221-C1-33 INJECTOR 3
ME221-C1-3 INJECTOR 4
ME221-C1-63 INJECTOR 1
ME221-C1-4 INJECTOR 2
ME221-C1-33 INJECTOR 3
ME221-C1-3 INJECTOR 4
ME221-C1-68 Stepper 2 / A2
ME221-C1-67 Stepper 1 / A1
ME221-C1-22 CAM A VR+
ME221-C1-32 COIL 1
ME221-C1-31 COIL 2
ME221-C1-2 COIL 3
ME221-C1-1 COIL 4
ME221-C1-53 KNOCK 1 SIGNAL
ME221-C1-12 LOW SIDE 2
GND
SP-0V · 2 pins
ME221-C1-80 CRANK VR+
ME221-C1-6 DIG_IN 1
ME221-C1-7 DIG_IN 2
OEM-E14
Stock ECU being replaced
1Injector 3 (cyl 3)
2Injector 4 (cyl 4)
3Injector 5 (cyl 5)
4Injector 6 (cyl 6)
5Injector 7 (cyl 7)
6Injector 8 (cyl 8)
7Throttle motor − (M−)
8Throttle motor + (M+)
10Camshaft position sensor (G2)
11Ignition coil 1 (IGT1)
12Ignition coil 2 (IGT2)
13Ignition coil 3 (IGT3)
14Ignition coil 4 (IGT4)
18Knock sensor LH (KNKL)
20VVT oil-control valve LH (OCV+)
21Power/injector ground (E01)
22Crank position sensor (NE−)
23Crank position sensor (NE+)
27Ignition confirmation 1 (IGF1)
28Ignition confirmation 2 (IGF2)
ME221-C1-44 LOW SIDE 4
ECM power feed (+BM)
ECM power (EFI relay +B1)
ME221-C1-74 LOW SIDE 3
ECM power (EFI relay +B)
OEM-E15
Stock ECU being replaced
5Fuel pump relay control (FC)
7ECM power feed (+BM)
8ECM power (EFI relay +B1)
10EFI main relay control (MREL)
16ECM power (EFI relay +B)
ME221
ME221-C1
ME221
1COIL 4
2COIL 3
3INJECTOR 4
4INJECTOR 2
6DIG_IN 1
7DIG_IN 2
10GROUND CHASSIS
12LOW SIDE 2
15IGN +12V
16LSU HEATER -VE
17ANA VOLT 3
18ANA VOLT 4
22CAM A VR+
23CAM A VR-
26ANA VOLT 1
31COIL 2
32COIL 1
33INJECTOR 3
37LOW SIDE RELAY 11
39LOW SIDE 6
42LOW SIDE RELAY 12
43LOW SIDE RELAY 14
44LOW SIDE 4
455V REF
52SENSORS GROUND
53KNOCK 1 SIGNAL
56ANA VOLT 2
57ANA TEMP 2
61GROUND
63INJECTOR 1
64VBAT
67Stepper 1 / A1
68Stepper 2 / A2
69LOW SIDE 5
72LOW SIDE RELAY 13
73LOW SIDE 1
74LOW SIDE 3
80CRANK VR+
84Sensor Ground
86ANA TEMP 1
89GROUND
90GROUND
OEM-E14-14 Ignition coil 4 (IGT4)
OEM-E14-13 Ignition coil 3 (IGT3)
Injector 8 (cyl 8) · 2 pins
Injector 6 (cyl 6) · 2 pins
OEM-E14-27 Ignition confirmation 1 (IGF1)
OEM-E14-28 Ignition confirmation 2 (IGF2)
GND
OEM-E14-20 VVT oil-control valve LH (OCV+)
IGN +12V
OEM-E11-7 O2 sensor heater (bank unconfirmed)
OEM-E13-21 Accelerator pedal position 1 (VPA)
OEM-E13-20 Throttle position sensor 2 (VTA2)
OEM-E14-10 Camshaft position sensor (G2)
OEM-E13-16 VVT position sensor LH (VVL+)
OEM-E13-10 MAF signal (VG)
OEM-E14-12 Ignition coil 2 (IGT2)
OEM-E14-11 Ignition coil 1 (IGT1)
Injector 3 (cyl 3) · 2 pins
OEM-E13-4 O2 sensor heater (bank unconfirmed)
OEM-E13-3 O2 sensor heater (bank unconfirmed)
OEM-E11-28 VVT oil-control valve RH (OCR−)
OEM-E13-8 Throttle magnetic clutch − (CL−)
OEM-E15-5 Fuel pump relay control (FC)
5V ref
0V sensor
OEM-E14-18 Knock sensor LH (KNKL)
OEM-E13-13 Throttle position sensor 1 (VTA)
OEM-E13-22 Intake air temp (THA)
GND
INJECTOR 1 · 2 pins
VBAT
OEM-E14-8 Throttle motor + (M+)
OEM-E14-7 Throttle motor − (M−)
OEM-E11-8 O2 sensor heater (bank unconfirmed)
OEM-E12-12 Throttle magnetic clutch + (CL+)
OEM-E11-19 VVT oil-control valve RH (OCR+)
OEM-E15-10 EFI main relay control (MREL)
OEM-E14-23 Crank position sensor (NE+)
0V sensor
OEM-E13-14 Engine coolant temp (THW)
GND
GND
SP-GND · 7 pins
SP-0V · 7 pins
SP-14V · 6 pins
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