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-C3-25 PWM 7
T12-C3-10 PWM 8
T12-C1-34 Injector 3
T12-C3-4 PWM 9
T12-C3-28 PWM 10
T12-C1-25 Injector 4
T12-C1-3 PWM 3
T12-C3-22 PWM 4
T12-C3-29 PWM 11
ISC valve +14V feed
T12-C3-24 PWM 6
T12-C3-30 PWM 12
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
MFuel pump relay
NVTCS solenoid (intake butterflies)
PISC valve +14V feed
QISC valve low side
RMalfunction indicator lamp (MIL)
GND
GND
T12-C1-16 Injector 5
T12-C1-10 Coil 1
T12-C3-23 PWM 5
T12-C1-18 Coil 2
T12-C3-9 Lambda 1 Heater Negative
T12-C1-15 Injector 6
T12-C3-3 Lambda 2 Heater Negative
T12-C2-4 Digital 1
T12-C2-2 Wheel 1
T12-C1-24 Injector 7
T12-C2-22 Cam 1
T12-C2-12 Crank
OEM-3
Stock ECU being replaced
APower ground
BPower ground
ECharcoal canister purge
FIgnition 1 (coils 1+4, wasted spark)
HMain relay
IIgnition 2 (coils 2+3, wasted spark)
JFront O2 heater
MAlternator control
PRear O2 heater
SImmobiliser
TVehicle speed
UCharge lamp
VCam position (CMP)
YCrank position (CKP)
GND
T12-C2-8 Digital 2
T12-C2-11 Digital 3
VVT oil-control solenoid +12V feed
T12-C2-14 Digital 4
T12-C2-15 Digital 5
T12-C2-27 Digital 6
T12-C3-19 Digital 7
5V ref
T12-C3-31 Knock 1
T12-C2-25 Thermistor 2
0V sensor
T12-C2-7 Thermistor 1
T12-C1-23 Injector 8
T12-C2-5 Analogue 3
T12-C2-18 Analogue 5
T12-C2-10 Analogue 1
T12-C2-6 Analogue 4
T12-C2-19 Analogue 6
T12-C2-1 Analogue 2
ECU power +14V (main relay)
Constant +12V
OEM-4
Stock ECU being replaced
APower ground
BBrake switch
CPower steering pressure switch
DVVT oil-control solenoid +12V feed
FA/C request
HNeutral switch
IClutch switch
JVTCS vacuum switch
L+5V sensor supply
MKnock sensor
NIntake air temperature (IAT)
OSignal ground
PCoolant temperature (ECT)
RVVT oil-control solenoid (low-side control)
VThrottle position (TPS)
WFront O2 signal
XMass air flow (MAF)
AARear O2 signal
ADFuel level
AEPressure sensor (Mazda: EGR boost sensor)
AFECU power +14V (main relay)
AGConstant +12V
T12
T12-C1
T12
3PWM 3
4PWM 2
5PWM 1
9Injector 1
10Coil 1
13Power Ground 1
14Power Ground 2
15Injector 6
16Injector 5
17Injector 2
18Coil 2
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-2-A Injector 1
OEM-3-F Ignition 1 (coils 1+4, wasted spark)
GND
GND
OEM-3-M Alternator control
OEM-3-E Charcoal canister purge
OEM-2-D Injector 2
OEM-3-I Ignition 2 (coils 2+3, wasted spark)
OEM-4-R VVT oil-control solenoid (low-side control)
OEM-3-U Charge lamp
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-AE Pressure sensor (Mazda: EGR boost sensor)
OEM-3-T Vehicle speed
OEM-3-S Immobiliser
OEM-4-V Throttle position (TPS)
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-H EGR valve
OEM-3-J Front O2 heater
OEM-2-F EGR valve
OEM-4-J VTCS vacuum switch
OEM-2-M Fuel pump relay
OEM-3-H Main relay
OEM-2-Q ISC valve low side
OEM-2-E EGR valve
Permanent 12v
OEM-2-I EGR valve
OEM-2-N VTCS solenoid (intake butterflies)
OEM-2-R Malfunction indicator lamp (MIL)
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.
57 / 57 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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