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)
ME221-C1-6 DIG_IN 1
ME221-C1-73 LOW SIDE 1
ME221-C1-32 COIL 1
ME221-C1-31 COIL 2
ME221-C1-37 LOW SIDE RELAY 11
ME221-C1-7 DIG_IN 2
ME221-C1-18 ANA VOLT 4
ME221-C1-42 LOW SIDE RELAY 12
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
NWide-open throttle switch
PPower steering pressure switch
RA/C extra cooling fan relay
GND
GND
0V sensor
0V sensor
ME221-C1-80 CRANK VR+
F no data
ME221-C1-22 CAM A VR+
ME221-C1-79 TACHOMETER
5V ref
ME221-C1-56 ANA VOLT 2
ME221-C1-17 ANA VOLT 3
ME221-C1-26 ANA VOLT 1
ME221-C1-57 ANA TEMP 2
ME221-C1-86 ANA TEMP 1
ME221-C1-63 INJECTOR 1
ME221-C1-4 INJECTOR 2
ME221-C1-12 LOW SIDE 2
ME221-C1-74 LOW SIDE 3
ME221-C1-33 INJECTOR 3
ME221-C1-3 INJECTOR 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
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)
ME221
ME221-C1
ME221
3INJECTOR 4
4INJECTOR 2
6DIG_IN 1
7DIG_IN 2
10GROUND CHASSIS
12LOW SIDE 2
15IGN +12V
17ANA VOLT 3
18ANA VOLT 4
22CAM A VR+
26ANA VOLT 1
31COIL 2
32COIL 1
33INJECTOR 3
37LOW SIDE RELAY 11
42LOW SIDE RELAY 12
455V REF
52SENSORS GROUND
56ANA VOLT 2
57ANA TEMP 2
61GROUND
63INJECTOR 1
64VBAT
73LOW SIDE 1
74LOW SIDE 3
79TACHOMETER
80CRANK VR+
84Sensor Ground
86ANA TEMP 1
89GROUND
90GROUND
OEM-2-Z Injector 4 (California sequential)
OEM-2-V Injector 2 & 4 (batch)
OEM-1-C Start signal
OEM-1-N Wide-open throttle switch
GND
OEM-2-W Idle speed control (ISC) valve
IGN +12V
OEM-2-N O2 sensor
OEM-1-P Power steering pressure switch
OEM-2-G Cam position (CAS G)
OEM-2-O Air flow meter (AFM)
OEM-1-H Ignition 2 (coils 2+3, wasted spark)
OEM-1-G Ignition 1 (coils 1+4, wasted spark)
OEM-2-Y Injector 3 (California sequential)
OEM-1-J A/C relay
OEM-1-R A/C extra cooling fan relay
5V ref
0V sensor
OEM-2-M TPS signal (A/T)
OEM-2-P Intake air temperature (IAT)
GND
OEM-2-U Injector 1 & 3 (batch)
VBAT
OEM-1-E Malfunction indicator lamp (MIL)
OEM-2-X Purge solenoid valve
OEM-2-I Tachometer output
OEM-2-E Crank position (CAS NE)
0V sensor
OEM-2-Q Coolant temperature (ECT)
GND
GND
SP-14V · 4 pins
SP-GND · 7 pins
SP-0V · 5 pins
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.