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
NEXUSS3-A-26 ECR output
NEXUSS3-A-9 DPO 1
NEXUSS3-C-7 SPI 3
NEXUSS3-A-15 DPO 4
NEXUSS3-A-12 DPO 2
NEXUSS3-C-8 SPI 4
NEXUSS3-C-19 SPI 5
NEXUSS3-C-6 SPI 2
NEXUSS3-C-20 SPI 6
NEXUSS3-A-14 DPO 3
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)
NEXUSS3-C-10 AVI 1
NEXUSS3-C-15 AVI 6
NEXUSS3-C-16 AVI 7
NEXUSS3-C-11 AVI 2
NEXUSS3-C-12 AVI 3
NEXUSS3-C-13 AVI 4
5V ref
NEXUSS3-C-18 AVI 9
NEXUSS3-C-17 AVI 8
NEXUSS3-C-27 AVI 10
NEXUSS3-C-33 WBI 1 Heater -
NEXUSS3-C-14 AVI 5
0V sensor
NEXUSS3-C-28 AVI 11
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
NEXUSS3-C-1 Trigger +
NEXUSS3-C-5 SPI 1
NEXUSS3-C-3 Home +
0V sensor
NEXUSS3-A-16 DPO 5
GND
NEXUSS3-A-27 Ignition 1
NEXUSS3-A-17 DPO 6
NEXUSS3-A-5 Injector 5
NEXUSS3-A-6 Injector 6
NEXUSS3-A-28 Ignition 2
NEXUSS3-A-7 Injector 7
NEXUSS3-A-1 Injector 1
NEXUSS3-A-2 Injector 2
NEXUSS3-A-3 Injector 3
NEXUSS3-A-4 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)
JPRC solenoid (FPR control)
KChassis ground
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)
NEXUSS3
NEXUSS3-A
NEXUSS3
1Injector 1
2Injector 2
3Injector 3
4Injector 4
5Injector 5
6Injector 6
7Injector 7
9DPO 1
10Battery ground
11Battery ground
12DPO 2
14DPO 3
15DPO 4
16DPO 5
17DPO 6
18+12V switched input
25+12V switched input
26ECR output
27Ignition 1
28Ignition 2
OEM-4-U Injector 1 (cyl 1)
OEM-4-V Injector 2 (cyl 2)
OEM-4-W Injector 3 (cyl 3)
OEM-4-X Injector 4 (cyl 4)
OEM-4-P EGR vacuum solenoid
OEM-4-Q Idle air control (IAC) valve
OEM-4-T EVAP purge solenoid
OEM-1-B A/C condenser fan relay
GND
GND
OEM-1-G A/C clutch relay
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
+12V switched input
+12V switched input
OEM-1-A Cooling fan relay (low-side)
OEM-4-N Ignition coil trigger (cyl 1&4)
OEM-4-R Ignition coil trigger (cyl 2&3)
NEXUSS3-C
NEXUSS3
1Trigger +
2Trigger -
3Home +
4Home -
5SPI 1
6SPI 2
7SPI 3
8SPI 4
10AVI 1
11AVI 2
12AVI 3
13AVI 4
14AVI 5
15AVI 6
16AVI 7
17AVI 8
18AVI 9
19SPI 5
20SPI 6
25+5V
26Signal ground
27AVI 10
28AVI 11
33WBI 1 Heater -
OEM-4-E Crank position (CKP) sensor
SP-0V · 2 pins
OEM-4-G CAS SGC (cam sync)
SP-0V · 2 pins
OEM-4-F CAS SGT (cam trigger)
OEM-1-M Vehicle speed sensor (VSS)
OEM-1-C Starter input (12V while cranking)
OEM-1-K A/C pressure switch (A/C request)
OEM-3-B MAF sensor input
OEM-3-F Throttle position (TPS)
OEM-3-G Engine coolant temp (CLT)
OEM-3-H EGR boost sensor
OEM-3-N EGR boost sensor (2nd channel)
OEM-3-C Front O2 sensor input
OEM-3-D Rear O2 sensor input
OEM-3-K Intake air temp (IAT)
OEM-3-J EGR valve position sensor
OEM-1-L Clutch switch
OEM-1-Q Brake switch
5V ref
0V sensor
OEM-3-L Idle switch (closed throttle)
OEM-3-P Power steering pressure switch
OEM-3-M Front O2 heater control
SP-14V · 4 pins
SP-GND · 7 pins
SP-0V · 6 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.
51 / 51 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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