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
ECU power +14V (main relay)
NEXUSS3-C-6 SPI 2
NEXUSS3-C-33 WBI 1 Heater -
NEXUSS3-A-27 Ignition 1
NEXUSS3-A-28 Ignition 2
NEXUSS3-A-26 ECR output
NEXUSS3-A-15 DPO 4
NEXUSS3-C-5 SPI 1
NEXUSS3-C-7 SPI 3
NEXUSS3-C-8 SPI 4
NEXUSS3-C-19 SPI 5
NEXUSS3-A-9 DPO 1
NEXUSS3-C-20 SPI 6
OEM-1
Stock ECU being replaced
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
LCoolant fan relay
MVehicle speed
OStop light switch
PPower steering pressure switch
QA/C request
RCooling fan relay
VNeutral/clutch switch
GND
GND
0V sensor
0V sensor
NEXUSS3-C-1 Trigger +
0V sensor
NEXUSS3-C-3 Home +
5V ref
NEXUSS3-A-16 DPO 5
NEXUSS3-C-11 AVI 2
NEXUSS3-C-13 AVI 4
NEXUSS3-C-10 AVI 1
NEXUSS3-C-14 AVI 5
NEXUSS3-C-12 AVI 3
NEXUSS3-A-5 Injector 5
NEXUSS3-A-12 DPO 2
NEXUSS3-A-14 DPO 3
NEXUSS3-A-1 Injector 1
NEXUSS3-A-2 Injector 2
NEXUSS3-A-17 DPO 6
NEXUSS3-A-6 Injector 6
NEXUSS3-A-3 Injector 3
NEXUSS3-A-4 Injector 4
OEM-2
Stock ECU being replaced
APower ground
BPower ground
CSensor ground (E2)
DSensor ground (E2)
ECrank position (CAS NE)
FMAF ground
GCam position (CAS G)
K+5V sensor supply
LRear defroster relay
MThrottle position (TPS)
NO2 sensor
OMass air flow (MAF)
PIntake air temperature (IAT)
QCoolant temperature (ECT)
RPRC solenoid (fuel pressure regulator)
SCondenser fan relay
TFuel pump relay
UInjector 1
VInjector 2
WISC solenoid
XEvap purge solenoid
YInjector 3
ZInjector 4
NEXUSS3
NEXUSS3-A
NEXUSS3
1Injector 1
2Injector 2
3Injector 3
4Injector 4
5Injector 5
6Injector 6
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-2-U Injector 1
OEM-2-V Injector 2
OEM-2-Y Injector 3
OEM-2-Z Injector 4
OEM-2-R PRC solenoid (fuel pressure regulator)
OEM-2-X Evap purge solenoid
OEM-1-R Cooling fan relay
GND
GND
OEM-2-S Condenser fan relay
OEM-2-T Fuel pump relay
OEM-1-L Coolant fan relay
OEM-2-L Rear defroster relay
OEM-2-W ISC solenoid
+12V switched input
+12V switched input
OEM-1-J A/C relay
OEM-1-G Ignition 1 (coils 1+4, wasted spark)
OEM-1-H Ignition 2 (coils 2+3, wasted spark)
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
19SPI 5
20SPI 6
25+5V
26Signal ground
33WBI 1 Heater -
OEM-2-E Crank position (CAS NE)
SP-0V · 3 pins
OEM-2-G Cam position (CAS G)
SP-0V · 3 pins
OEM-1-M Vehicle speed
OEM-1-C Start signal
OEM-1-O Stop light switch
OEM-1-P Power steering pressure switch
OEM-2-O Mass air flow (MAF)
OEM-2-M Throttle position (TPS)
OEM-2-Q Coolant temperature (ECT)
OEM-2-N O2 sensor
OEM-2-P Intake air temperature (IAT)
OEM-1-Q A/C request
OEM-1-V Neutral/clutch switch
5V ref
0V sensor
OEM-1-E Malfunction indicator lamp (MIL)
SP-14V · 4 pins
SP-GND · 5 pins
SP-0V · 7 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.
43 / 43 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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