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-C1-5 PWM 1
T12-C1-4 PWM 2
T12-C2-4 Digital 1
T12-C3-23 PWM 5
T12-C1-3 PWM 3
T12-C2-8 Digital 2
T12-C2-11 Digital 3
T12-C2-2 Wheel 1
T12-C2-14 Digital 4
T12-C3-22 PWM 4
OEM-1
Stock ECU being replaced
ACooling fan relay (low-side)
BA/C condenser fan relay
CStarter input (12V while cranking)
ECheck engine light (MIL)
GA/C clutch relay
KA/C pressure switch (A/C request)
LClutch switch
MVehicle speed sensor (VSS)
QBrake switch
UFuel pump relay (low-side)
T12-C2-10 Analogue 1
T12-C2-18 Analogue 5
T12-C2-19 Analogue 6
T12-C2-1 Analogue 2
T12-C2-7 Thermistor 1
T12-C2-5 Analogue 3
5V ref
T12-C3-17 Analogue 7
T12-C2-25 Thermistor 2
T12-C2-15 Digital 5
T12-C3-9 Lambda 1 Heater Negative
T12-C2-6 Analogue 4
0V sensor
T12-C2-27 Digital 6
OEM-3
Stock ECU being replaced
BMAF sensor input
CFront O2 sensor input
DRear O2 sensor input
FThrottle position (TPS)
GEngine coolant temp (CLT)
HEGR boost sensor
I+5V sensor reference
JEGR valve position sensor
KIntake air temp (IAT)
LIdle switch (closed throttle)
MFront O2 heater control
NEGR boost sensor (2nd channel)
OSensor ground
PPower steering pressure switch
GND
ECU power +12V (main relay)
GND
GND
T12-C2-12 Crank
T12-C2-29 Cam 2
T12-C2-22 Cam 1
0V sensor
Permanent +12V (battery)
T12-C3-24 PWM 6
GND
T12-C3-29 PWM 11
T12-C1-10 Coil 1
T12-C3-25 PWM 7
T12-C3-10 PWM 8
T12-C3-4 PWM 9
T12-C1-18 Coil 2
T12-C3-28 PWM 10
T12-C1-9 Injector 1
T12-C1-17 Injector 2
T12-C1-34 Injector 3
T12-C1-25 Injector 4
OEM-4
Stock ECU being replaced
AChassis ground
BECU power +12V (main relay)
CChassis ground
DChassis ground
ECrank position (CKP) sensor
FCAS SGT (cam trigger)
GCAS SGC (cam sync)
HCrank pickup timing ground (CKP gnd)
IPermanent +12V (battery)
JPRC solenoid (FPR control)
KChassis ground
LTachometer output
NIgnition coil trigger (cyl 1&4)
OEGR vent solenoid
PEGR vacuum solenoid
QIdle air control (IAC) valve
RIgnition coil trigger (cyl 2&3)
TEVAP purge solenoid
UInjector 1 (cyl 1)
VInjector 2 (cyl 2)
WInjector 3 (cyl 3)
XInjector 4 (cyl 4)
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-G A/C clutch relay
OEM-1-B A/C condenser fan relay
OEM-1-A Cooling fan relay (low-side)
OEM-4-U Injector 1 (cyl 1)
OEM-4-N Ignition coil trigger (cyl 1&4)
GND
GND
OEM-4-V Injector 2 (cyl 2)
OEM-4-R Ignition coil trigger (cyl 2&3)
OEM-4-X Injector 4 (cyl 4)
Ignition 12v In
OEM-4-W Injector 3 (cyl 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
29Cam 2
33Sensor Ground
OEM-3-F Throttle position (TPS)
OEM-1-M Vehicle speed sensor (VSS)
OEM-1-C Starter input (12V while cranking)
OEM-3-H EGR boost sensor
OEM-3-N EGR boost sensor (2nd channel)
OEM-3-G Engine coolant temp (CLT)
OEM-1-K A/C pressure switch (A/C request)
OEM-3-B MAF sensor input
OEM-1-L Clutch switch
OEM-4-E Crank position (CKP) sensor
OEM-1-Q Brake switch
OEM-3-L Idle switch (closed throttle)
OEM-3-C Front O2 sensor input
OEM-3-D Rear O2 sensor input
0V sensor
OEM-4-G CAS SGC (cam sync)
5V ref
OEM-3-K Intake air temp (IAT)
OEM-3-P Power steering pressure switch
OEM-4-F CAS SGT (cam trigger)
0V sensor
T12-C3
T12
4PWM 9
9Lambda 1 Heater Negative
10PWM 8
17Analogue 7
22PWM 4
23PWM 5
24PWM 6
25PWM 7
26Permanent 12v
28PWM 10
29PWM 11
OEM-4-Q Idle air control (IAC) valve
OEM-3-M Front O2 heater control
OEM-4-P EGR vacuum solenoid
OEM-3-J EGR valve position sensor
OEM-1-U Fuel pump relay (low-side)
OEM-1-E Check engine light (MIL)
OEM-4-J PRC solenoid (FPR control)
OEM-4-O EGR vent solenoid
Permanent 12v
OEM-4-T EVAP purge solenoid
OEM-4-L Tachometer output
SP-14V · 3 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.