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
T12-C1-9 Injector 1
T12-C1-5 PWM 1
T12-C1-4 PWM 2
T12-C1-17 Injector 2
T12-C3-10 PWM 8
T12-C3-4 PWM 9
T12-C1-34 Injector 3
T12-C3-28 PWM 10
T12-C3-29 PWM 11
T12-C1-25 Injector 4
T12-C1-3 PWM 3
L no data
T12-C3-22 PWM 4
T12-C3-30 PWM 12
T12-C3-24 PWM 6
ISC valve +14V feed
T12-C3-25 PWM 7
T12-C1-16 Injector 5
OEM-2
Stock ECU being replaced
AInjector 1
BCooling fan relay
CCondenser fan relay
DInjector 2
EEGR valve
FEGR valve
GInjector 3
HEGR valve
IEGR valve
JInjector 4
KA/C clutch relay
L no data
MFuel pump relay
NVTCS solenoid (intake butterflies)
OFuel pump relay (non-immobiliser)
PISC valve +14V feed
QISC valve low side
RMalfunction indicator lamp (MIL)
GND
GND
T12-C1-15 Injector 6
E no data
T12-C1-10 Coil 1
G no data
T12-C3-23 PWM 5
T12-C1-18 Coil 2
T12-C3-9 Lambda 1 Heater Negative
T12-C1-24 Injector 7
L no data
T12-C1-23 Injector 8
N no data
T12-C3-3 Lambda 2 Heater Negative
R no data
T12-C2-4 Digital 1
T12-C2-2 Wheel 1
T12-C1-21 Injector 9
T12-C2-22 Cam 1
W–X no data
T12-C2-12 Crank
Z no data
OEM-3
Stock ECU being replaced
APower ground
BPower ground
CPurge solenoid valve
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
KEVAP leak detection pump
L no data
MAlternator control
N no data
PRear O2 heater
R no data
SImmobiliser
TVehicle speed
UCharge lamp
VCam position (CMP)
W–X no data
YCrank position (CKP)
Z no data
GND
T12-C2-8 Digital 2
T12-C2-11 Digital 3
VVT oil-control solenoid +12V feed
T12-C2-14 Digital 4
G no data
T12-C2-15 Digital 5
T12-C2-27 Digital 6
T12-C3-19 Digital 7
K no data
5V ref
T12-C3-31 Knock 1
T12-C2-25 Thermistor 2
0V sensor
T12-C2-7 Thermistor 1
Q no data
T12-C1-8 Injector 11
U no data
T12-C2-1 Analogue 2
T12-C2-18 Analogue 5
T12-C2-10 Analogue 1
Y no data
T12-C2-6 Analogue 4
AB no data
T12-C2-19 Analogue 6
T12-C2-5 Analogue 3
ECU power +14V (main relay)
Constant +12V
T12-C1-22 Injector 10
OEM-4
Stock ECU being replaced
APower ground
BBrake switch
CPower steering pressure switch
DVVT oil-control solenoid +12V feed
FA/C request
G no data
HNeutral switch
IClutch switch
JVTCS vacuum switch
K no data
L+5V sensor supply
MKnock sensor
NIntake air temperature (IAT)
OSignal ground
PCoolant temperature (ECT)
Q no data
RVVT oil-control solenoid (low-side control)
U no data
VThrottle position (TPS)
WFront O2 signal
XMass air flow (MAF)
Y no data
AARear O2 signal
AB no data
ADFuel level
AEPressure sensor (Mazda: EGR boost sensor)
AFECU power +14V (main relay)
AGConstant +12V
AHEVAP leak detection pump solenoid valve
T12
T12-C1
T12
3PWM 3
4PWM 2
5PWM 1
8Injector 11
9Injector 1
10Coil 1
13Power Ground 1
14Power Ground 2
15Injector 6
16Injector 5
17Injector 2
18Coil 2
21Injector 9
22Injector 10
23Injector 8
24Injector 7
25Injector 4
31Ignition 12v In
34Injector 3
OEM-2-K A/C clutch relay
OEM-2-C Condenser fan relay
OEM-2-B Cooling fan relay
OEM-4-R VVT oil-control solenoid (low-side control)
OEM-2-A Injector 1
OEM-3-F Ignition 1 (coils 1+4, wasted spark)
GND
GND
OEM-3-C Purge solenoid valve
OEM-2-R Malfunction indicator lamp (MIL)
OEM-2-D Injector 2
OEM-3-I Ignition 2 (coils 2+3, wasted spark)
OEM-3-U Charge lamp
OEM-4-AH EVAP leak detection pump solenoid valve
OEM-3-M Alternator control
OEM-3-K EVAP leak detection pump
OEM-2-J Injector 4
Ignition 12v In
OEM-2-G Injector 3
T12-C2
T12
1Analogue 2
2Wheel 1
4Digital 1
5Analogue 3
6Analogue 4
7Thermistor 1
8Digital 2
10Analogue 1
11Digital 3
12Crank
14Digital 4
15Digital 5
18Analogue 5
19Analogue 6
21Sensor Ground
22Cam 1
245v Output
25Thermistor 2
27Digital 6
33Sensor Ground
OEM-4-V Throttle position (TPS)
OEM-3-T Vehicle speed
OEM-3-S Immobiliser
OEM-4-AE Pressure sensor (Mazda: EGR boost sensor)
OEM-4-AA Rear O2 signal
OEM-4-P Coolant temperature (ECT)
OEM-4-B Brake switch
OEM-4-X Mass air flow (MAF)
OEM-4-C Power steering pressure switch
OEM-3-Y Crank position (CKP)
OEM-4-F A/C request
OEM-4-H Neutral switch
OEM-4-W Front O2 signal
OEM-4-AD Fuel level
0V sensor
OEM-3-V Cam position (CMP)
5V ref
OEM-4-N Intake air temperature (IAT)
OEM-4-I Clutch switch
0V sensor
T12-C3
T12
3Lambda 2 Heater Negative
4PWM 9
9Lambda 1 Heater Negative
10PWM 8
19Digital 7
22PWM 4
23PWM 5
24PWM 6
25PWM 7
26Permanent 12v
28PWM 10
29PWM 11
30PWM 12
31Knock 1
OEM-3-P Rear O2 heater
OEM-2-F EGR valve
OEM-3-J Front O2 heater
OEM-2-E EGR valve
OEM-4-J VTCS vacuum switch
OEM-2-M Fuel pump relay
OEM-3-H Main relay
OEM-2-O Fuel pump relay (non-immobiliser)
OEM-2-Q ISC valve low side
Permanent 12v
OEM-2-H EGR valve
OEM-2-I EGR valve
OEM-2-N VTCS solenoid (intake butterflies)
OEM-4-M Knock sensor
SP-GND · 6 pins
SP-14V · 5 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.
60 / 60 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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