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
ME221-C1-63 INJECTOR 1
ME221-C1-73 LOW SIDE 1
ME221-C1-12 LOW SIDE 2
ME221-C1-4 INJECTOR 2
ME221-C1-42 LOW SIDE RELAY 12
ME221-C1-72 LOW SIDE RELAY 13
ME221-C1-33 INJECTOR 3
ME221-C1-43 LOW SIDE RELAY 14
ME221-C1-3 INJECTOR 4
ME221-C1-74 LOW SIDE 3
L no data
ME221-C1-44 LOW SIDE 4
ME221-C1-37 LOW SIDE RELAY 11
ISC valve +14V feed
OEM-2
Stock ECU being replaced
AInjector 1
BCooling fan relay
CCondenser fan relay
DInjector 2
EEGR valve
FEGR valve
GInjector 3
HEGR valve
JInjector 4
KA/C clutch relay
L no data
MFuel pump relay
OFuel pump relay (non-immobiliser)
PISC valve +14V feed
GND
GND
E no data
ME221-C1-32 COIL 1
G no data
ME221-C1-69 LOW SIDE 5
ME221-C1-31 COIL 2
ME221-C1-16 LSU HEATER -VE
L no data
N no data
ME221-C1-79 TACHOMETER
ME221-C1-39 LOW SIDE 6
R no data
ME221-C1-7 DIG_IN 2
ME221-C1-6 DIG_IN 1
ME221-C1-22 CAM A VR+
W–X no data
ME221-C1-80 CRANK VR+
Z no data
OEM-3
Stock ECU being replaced
APower ground
BPower ground
E no data
FIgnition 1 (coils 1+4, wasted spark)
G no data
HMain relay
IIgnition 2 (coils 2+3, wasted spark)
JFront O2 heater
L no data
N no data
OTachometer output
PRear O2 heater
R no data
SImmobiliser
TVehicle speed
VCam position (CMP)
W–X no data
YCrank position (CKP)
Z no data
GND
VVT oil-control solenoid +12V feed
G no data
K no data
5V ref
ME221-C1-53 KNOCK 1 SIGNAL
ME221-C1-57 ANA TEMP 2
0V sensor
ME221-C1-86 ANA TEMP 1
Q no data
U no data
ME221-C1-56 ANA VOLT 2
ME221-C1-26 ANA VOLT 1
Y no data
ME221-C1-18 ANA VOLT 4
AB no data
ME221-C1-17 ANA VOLT 3
ECU power +14V (main relay)
OEM-4
Stock ECU being replaced
APower ground
DVVT oil-control solenoid +12V feed
G no data
K no data
L+5V sensor supply
MKnock sensor
NIntake air temperature (IAT)
OSignal ground
PCoolant temperature (ECT)
Q no data
U no data
VThrottle position (TPS)
XMass air flow (MAF)
Y no data
AARear O2 signal
AB no data
AEPressure sensor (Mazda: EGR boost sensor)
AFECU power +14V (main relay)
ME221
ME221-C1
ME221
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+
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
69LOW SIDE 5
72LOW SIDE RELAY 13
73LOW SIDE 1
74LOW SIDE 3
79TACHOMETER
80CRANK VR+
84Sensor Ground
86ANA TEMP 1
89GROUND
90GROUND
OEM-2-J Injector 4
OEM-2-D Injector 2
OEM-3-T Vehicle speed
OEM-3-S Immobiliser
GND
OEM-2-C Condenser fan relay
IGN +12V
OEM-3-J Front O2 heater
OEM-4-AE Pressure sensor (Mazda: EGR boost sensor)
OEM-4-AA Rear O2 signal
OEM-3-V Cam position (CMP)
OEM-4-X Mass air flow (MAF)
OEM-3-I Ignition 2 (coils 2+3, wasted spark)
OEM-3-F Ignition 1 (coils 1+4, wasted spark)
OEM-2-G Injector 3
OEM-2-O Fuel pump relay (non-immobiliser)
OEM-3-P Rear O2 heater
OEM-2-E EGR valve
OEM-2-H EGR valve
OEM-2-M Fuel pump relay
5V ref
0V sensor
OEM-4-M Knock sensor
OEM-4-V Throttle position (TPS)
OEM-4-N Intake air temperature (IAT)
GND
OEM-2-A Injector 1
VBAT
OEM-3-H Main relay
OEM-2-F EGR valve
OEM-2-B Cooling fan relay
OEM-2-K A/C clutch relay
OEM-3-O Tachometer output
OEM-3-Y Crank position (CKP)
0V sensor
OEM-4-P Coolant temperature (ECT)
GND
GND
SP-GND · 8 pins
SP-14V · 6 pins
SP-0V · 4 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.