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-A-13 Ignition switch input
NEXUSS3-A-12 DPO 2
NEXUSS3-A-27 Ignition 1
NEXUSS3-A-28 Ignition 2
NEXUSS3-A-26 ECR output
NEXUSS3-C-5 SPI 1
NEXUSS3-C-6 SPI 2
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
NEXUSS3-C-15 AVI 6
NEXUSS3-C-16 AVI 7
OEM-1
Stock ECU being replaced
BECU power +14V (main relay)
CIgnition on (+12V)
EMalfunction indicator lamp (MIL)
GIgnition 1 (coils 1+4, wasted spark)
HIgnition 2 (coils 2+3, wasted spark)
JA/C relay
KDiagnostic mode switch (TEN)
NWide-open throttle switch
OStop light switch
PPower steering pressure switch
QA/C thermo switch
RA/C extra cooling fan relay
SHeater control switch (A/C request)
UTail fuse / TNS (parking lamp +12V)
VNeutral/clutch switch
GND
GND
0V sensor
0V sensor
NEXUSS3-C-1 Trigger +
F no data
NEXUSS3-C-3 Home +
NEXUSS3-A-16 DPO 5
5V ref
NEXUSS3-C-17 AVI 8
NEXUSS3-C-12 AVI 3
NEXUSS3-C-13 AVI 4
NEXUSS3-C-11 AVI 2
NEXUSS3-C-14 AVI 5
NEXUSS3-C-10 AVI 1
NEXUSS3-A-1 Injector 1
NEXUSS3-A-2 Injector 2
NEXUSS3-A-14 DPO 3
NEXUSS3-A-15 DPO 4
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)
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)
NEXUSS3
NEXUSS3-A
NEXUSS3
1Injector 1
2Injector 2
3Injector 3
4Injector 4
9DPO 1
10Battery ground
11Battery ground
12DPO 2
13Ignition switch input
14DPO 3
15DPO 4
16DPO 5
18+12V switched input
25+12V switched input
26ECR output
27Ignition 1
28Ignition 2
OEM-2-U Injector 1 & 3 (batch)
OEM-2-V Injector 2 & 4 (batch)
OEM-2-Y Injector 3 (California sequential)
OEM-2-Z Injector 4 (California sequential)
OEM-1-R A/C extra cooling fan relay
GND
GND
OEM-1-E Malfunction indicator lamp (MIL)
OEM-1-C Ignition on (+12V)
OEM-2-W Idle speed control (ISC) valve
OEM-2-X Purge solenoid valve
OEM-2-I Tachometer output
+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
15AVI 6
16AVI 7
17AVI 8
19SPI 5
20SPI 6
25+5V
26Signal ground
OEM-2-E Crank position (CAS NE)
SP-0V · 2 pins
OEM-2-G Cam position (CAS G)
SP-0V · 2 pins
OEM-1-K Diagnostic mode switch (TEN)
OEM-1-N Wide-open throttle switch
OEM-1-O Stop light switch
OEM-1-P Power steering pressure switch
OEM-2-Q Coolant temperature (ECT)
OEM-2-O Air flow meter (AFM)
OEM-2-M TPS signal (A/T)
OEM-2-N O2 sensor
OEM-2-P Intake air temperature (IAT)
OEM-1-U Tail fuse / TNS (parking lamp +12V)
OEM-1-V Neutral/clutch switch
OEM-2-L Idle switch (TPS)
OEM-1-Q A/C thermo switch
OEM-1-S Heater control switch (A/C request)
5V ref
0V sensor
SP-14V · 4 pins
SP-GND · 5 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.
42 / 42 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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