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
Constant +12V
ECU power +14V (main relay)
T12-C2-4 Digital 1
T12-C1-3 PWM 3
T12-C1-10 Coil 1
T12-C1-18 Coil 2
T12-C1-5 PWM 1
T12-C2-8 Digital 2
T12-C2-11 Digital 3
T12-C2-14 Digital 4
T12-C1-4 PWM 2
T12-C2-15 Digital 5
OEM-1
Stock ECU being replaced
AConstant +12V
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
QA/C request
RA/C extra cooling fan relay
VNeutral/clutch switch
GND
GND
0V sensor
0V sensor
T12-C2-12 Crank
F no data
T12-C2-22 Cam 1
T12-C3-24 PWM 6
5V ref
T12-C2-27 Digital 6
T12-C2-1 Analogue 2
T12-C2-5 Analogue 3
T12-C2-10 Analogue 1
T12-C2-25 Thermistor 2
T12-C2-7 Thermistor 1
T12-C1-9 Injector 1
T12-C1-17 Injector 2
T12-C3-22 PWM 4
T12-C3-23 PWM 5
T12-C1-34 Injector 3
T12-C1-25 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
LIdle switch (TPS)
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)
T12
T12-C1
T12
3PWM 3
4PWM 2
5PWM 1
9Injector 1
10Coil 1
13Power Ground 1
14Power Ground 2
17Injector 2
18Coil 2
25Injector 4
31Ignition 12v In
34Injector 3
OEM-1-E Malfunction indicator lamp (MIL)
OEM-1-R A/C extra cooling fan relay
OEM-1-J A/C relay
OEM-2-U Injector 1 & 3 (batch)
OEM-1-G Ignition 1 (coils 1+4, wasted spark)
GND
GND
OEM-2-V Injector 2 & 4 (batch)
OEM-1-H Ignition 2 (coils 2+3, wasted spark)
OEM-2-Z Injector 4 (California sequential)
Ignition 12v In
OEM-2-Y Injector 3 (California sequential)
T12-C2
T12
1Analogue 2
4Digital 1
5Analogue 3
7Thermistor 1
8Digital 2
10Analogue 1
11Digital 3
12Crank
14Digital 4
15Digital 5
21Sensor Ground
22Cam 1
245v Output
25Thermistor 2
27Digital 6
33Sensor Ground
OEM-2-M TPS signal (A/T)
OEM-1-C Start signal
OEM-2-N O2 sensor
OEM-2-Q Coolant temperature (ECT)
OEM-1-N Wide-open throttle switch
OEM-2-O Air flow meter (AFM)
OEM-1-P Power steering pressure switch
OEM-2-E Crank position (CAS NE)
OEM-1-Q A/C request
OEM-1-V Neutral/clutch switch
0V sensor
OEM-2-G Cam position (CAS G)
5V ref
OEM-2-P Intake air temperature (IAT)
OEM-2-L Idle switch (TPS)
0V sensor
T12-C3
T12
22PWM 4
23PWM 5
24PWM 6
26Permanent 12v
OEM-2-W Idle speed control (ISC) valve
OEM-2-X Purge solenoid valve
OEM-2-I Tachometer output
Permanent 12v
SP-14V · 3 pins
SP-GND · 5 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.
37 / 37 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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