Chevrolet Camaro SS 2010-15 (LS3/L99) → Haltech Nexus S3 HT-213000 (auto)

Chevrolet Camaro SS 2010-15 (LS3/L99) — Haltech — Nexus S3

Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-07

Before you start

Status	proposal · not yet verified: nobody has reported building and running this harness
Open errors	none
Size of the job	83 wires · 8 connectors · 0 part lines
Tools	Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink
Order of work	1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up.

Build checklist

Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.

Wire	From	To	Gauge	Cut	Label	Crimp A	Crimp B	Pin A	Pin B	Continuity
W1	OEM-X1-19	SP-14V-1	0.85	☐	☐	☐	☐	☐	☐	☐
W2	OEM-X1-47	SP-14V-1	0.85	☐	☐	☐	☐	☐	☐	☐
W3	SP-14V-1	NEXUSS3-A-18	0.85	☐	☐	☐	☐	☐	☐	☐
W4	SP-14V-1	NEXUSS3-A-25	0.85	☐	☐	☐	☐	☐	☐	☐
W5	OEM-X1-73	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W6	OEM-X2-78	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W7	OEM-X2-79	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W8	SP-GND-1	NEXUSS3-A-10	0.85	☐	☐	☐	☐	☐	☐	☐
W9	SP-GND-1	NEXUSS3-A-11	0.85	☐	☐	☐	☐	☐	☐	☐
W10	OEM-X1-11	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W11	OEM-X1-23	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W12	OEM-X1-30	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W13	OEM-X1-38	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W14	OEM-X1-49	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W15	OEM-X2-22	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W16	OEM-X2-34	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W17	OEM-X2-35	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W18	OEM-X2-52	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W19	OEM-X2-53	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W20	OEM-X2-56	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W21	OEM-X2-60	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W22	OEM-X2-66	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W23	OEM-X2-69	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W24	SP-0V-1	NEXUSS3-C-26	0.5	☐	☐	☐	☐	☐	☐	☐
W25	OEM-X1-33	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W26	OEM-X1-34	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W27	OEM-X1-36	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W28	OEM-X1-56	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W29	OEM-X2-2	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W30	OEM-X2-3	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W31	OEM-X2-41	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W32	OEM-X2-43	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W33	OEM-X2-44	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W34	SP-5V1-1	NEXUSS3-C-25	0.5	☐	☐	☐	☐	☐	☐	☐
W35	OEM-X2-68	NEXUSS3-C-1	0.5	☐	☐	☐	☐	☐	☐	☐
W36	SP-0V-1	NEXUSS3-C-2	0.5	☐	☐	☐	☐	☐	☐	☐
W37	OEM-X2-64	NEXUSS3-C-3	0.5	☐	☐	☐	☐	☐	☐	☐
W38	SP-0V-1	NEXUSS3-C-4	0.5	☐	☐	☐	☐	☐	☐	☐
W39	OEM-X2-26	NEXUSS3-C-23	0.5	☐	☐	☐	☐	☐	☐	☐
W40	OEM-X2-27	NEXUSS3-C-24	0.5	☐	☐	☐	☐	☐	☐	☐
W41	OEM-X2-70	NEXUSS3-A-27	0.5	☐	☐	☐	☐	☐	☐	☐
W42	OEM-X2-73	NEXUSS3-A-28	0.5	☐	☐	☐	☐	☐	☐	☐
W43	OEM-X2-77	NEXUSS3-A-29	0.5	☐	☐	☐	☐	☐	☐	☐
W44	OEM-X2-76	NEXUSS3-A-30	0.5	☐	☐	☐	☐	☐	☐	☐
W45	OEM-X2-75	NEXUSS3-A-31	0.5	☐	☐	☐	☐	☐	☐	☐
W46	OEM-X2-74	NEXUSS3-A-32	0.5	☐	☐	☐	☐	☐	☐	☐
W47	OEM-X2-72	NEXUSS3-A-33	0.5	☐	☐	☐	☐	☐	☐	☐
W48	OEM-X2-71	NEXUSS3-A-34	0.5	☐	☐	☐	☐	☐	☐	☐
W49	OEM-X2-20	NEXUSS3-A-1	0.5	☐	☐	☐	☐	☐	☐	☐
W50	OEM-X2-37	NEXUSS3-A-2	0.5	☐	☐	☐	☐	☐	☐	☐
W51	OEM-X2-38	NEXUSS3-A-3	0.5	☐	☐	☐	☐	☐	☐	☐
W52	OEM-X2-39	NEXUSS3-A-4	0.5	☐	☐	☐	☐	☐	☐	☐
W53	OEM-X2-18	NEXUSS3-A-5	0.5	☐	☐	☐	☐	☐	☐	☐
W54	OEM-X2-19	NEXUSS3-A-6	0.5	☐	☐	☐	☐	☐	☐	☐
W55	OEM-X2-40	NEXUSS3-A-7	0.5	☐	☐	☐	☐	☐	☐	☐
W56	OEM-X2-17	NEXUSS3-A-8	0.5	☐	☐	☐	☐	☐	☐	☐
W57	OEM-X2-6	NEXUSS3-A-19	0.5	☐	☐	☐	☐	☐	☐	☐
W58	OEM-X2-5	NEXUSS3-A-20	0.5	☐	☐	☐	☐	☐	☐	☐
W59	OEM-X1-50	NEXUSS3-A-26	0.5	☐	☐	☐	☐	☐	☐	☐
W60	OEM-X1-59	NEXUSS3-A-9	0.5	☐	☐	☐	☐	☐	☐	☐
W61	OEM-X1-17	NEXUSS3-A-12	0.5	☐	☐	☐	☐	☐	☐	☐
W62	OEM-X1-51	NEXUSS3-A-14	0.5	☐	☐	☐	☐	☐	☐	☐
W63	OEM-X1-52	NEXUSS3-A-15	0.5	☐	☐	☐	☐	☐	☐	☐
W64	OEM-X1-58	NEXUSS3-A-16	0.5	☐	☐	☐	☐	☐	☐	☐
W65	OEM-X1-63	NEXUSS3-A-17	0.5	☐	☐	☐	☐	☐	☐	☐
W66	OEM-X1-64	NEXUSS3-C-33	0.5	☐	☐	☐	☐	☐	☐	☐
W67	OEM-X1-65	NEXUSS3-A-21	0.5	☐	☐	☐	☐	☐	☐	☐
W68	OEM-X2-12	NEXUSS3-A-22	0.5	☐	☐	☐	☐	☐	☐	☐
W69	OEM-X1-41	NEXUSS3-C-10	0.5	☐	☐	☐	☐	☐	☐	☐
W70	OEM-X2-58	NEXUSS3-C-11	0.5	☐	☐	☐	☐	☐	☐	☐
W71	OEM-X1-29	NEXUSS3-C-12	0.5	☐	☐	☐	☐	☐	☐	☐
W72	OEM-X2-65	NEXUSS3-C-13	0.5	☐	☐	☐	☐	☐	☐	☐
W73	OEM-X1-32	NEXUSS3-C-14	0.5	☐	☐	☐	☐	☐	☐	☐
W74	OEM-X2-63	NEXUSS3-C-15	0.5	☐	☐	☐	☐	☐	☐	☐
W75	OEM-X1-10	NEXUSS3-C-16	0.5	☐	☐	☐	☐	☐	☐	☐
W76	OEM-X1-69	NEXUSS3-C-17	0.5	☐	☐	☐	☐	☐	☐	☐
W77	OEM-X2-57	NEXUSS3-C-18	0.5	☐	☐	☐	☐	☐	☐	☐
W78	OEM-X2-59	NEXUSS3-C-27	0.5	☐	☐	☐	☐	☐	☐	☐
W79	OEM-X2-21	NEXUSS3-C-28	0.5	☐	☐	☐	☐	☐	☐	☐
W80	OEM-X1-71	NEXUSS3-C-5	0.5	☐	☐	☐	☐	☐	☐	☐
W81	OEM-X1-72	NEXUSS3-C-6	0.5	☐	☐	☐	☐	☐	☐	☐
W82	OEM-X1-9	NEXUSS3-C-7	0.5	☐	☐	☐	☐	☐	☐	☐
W83	OEM-X2-33	NEXUSS3-C-8	0.5	☐	☐	☐	☐	☐	☐	☐

Bench test (before first power-up)

Battery disconnected, ECU and every sensor unplugged. Meter on resistance. Each pair below must read open (OL): a reading means a pinched wire, a stray strand or a mis-pinned cavity. Then check continuity of every wire (last column of the build checklist).

#	Probe A	Probe B	Expect	Why
1	NEXUSS3-A-18	NEXUSS3-A-10	open (OL)	+12 V supply must not touch power ground
2	NEXUSS3-C-25	NEXUSS3-A-10	open (OL)	5 V sensor reference must not touch power ground
3	NEXUSS3-A-18	NEXUSS3-C-25	open (OL)	+12 V supply must not touch 5 V sensor reference
4	NEXUSS3-C-2	NEXUSS3-A-18	open (OL)	sensor ground must not touch +12 V supply
5	NEXUSS3-C-2	NEXUSS3-C-25	open (OL)	sensor ground must not touch 5 V sensor reference

Revisions

Rev	Label	By	Date
No revisions yet.

Schematic

Connectors

NEXUSS3-A

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	Injector 1	—	W49	—	0.5	OEM-X2-20	—	—	—
10	Battery ground	—	W8	—	0.85	SP-GND-1	—	—	—
11	Battery ground	—	W9	—	0.85	SP-GND-1	—	—	—
12	DPO 2	—	W61	—	0.5	OEM-X1-17	—	—	—
13	Ignition switch input	—	—	—	—	—	—	—	—
14	DPO 3	—	W62	—	0.5	OEM-X1-51	—	—	—
15	DPO 4	—	W63	—	0.5	OEM-X1-52	—	—	—
16	DPO 5	—	W64	—	0.5	OEM-X1-58	—	—	—
17	DPO 6	—	W65	—	0.5	OEM-X1-63	—	—	—
18	+12V switched input	—	W3	—	0.85	SP-14V-1	—	—	—
19	HBO 1	—	W57	—	0.5	OEM-X2-6	—	—	—
2	Injector 2	—	W50	—	0.5	OEM-X2-37	—	—	—
20	HBO 2	—	W58	—	0.5	OEM-X2-5	—	—	—
21	HBO 3	—	W67	—	0.5	OEM-X1-65	—	—	—
22	HBO 4	—	W68	—	0.5	OEM-X2-12	—	—	—
23	CAN 1 High	—	—	—	—	—	—	—	—
24	CAN 1 Low	—	—	—	—	—	—	—	—
25	+12V switched input	—	W4	—	0.85	SP-14V-1	—	—	—
26	ECR output	—	W59	—	0.5	OEM-X1-50	—	—	—
27	Ignition 1	—	W41	—	0.5	OEM-X2-70	—	—	—
28	Ignition 2	—	W42	—	0.5	OEM-X2-73	—	—	—
29	Ignition 3	—	W43	—	0.5	OEM-X2-77	—	—	—
3	Injector 3	—	W51	—	0.5	OEM-X2-38	—	—	—
30	Ignition 4	—	W44	—	0.5	OEM-X2-76	—	—	—
31	Ignition 5	—	W45	—	0.5	OEM-X2-75	—	—	—
32	Ignition 6	—	W46	—	0.5	OEM-X2-74	—	—	—
33	Ignition 7	—	W47	—	0.5	OEM-X2-72	—	—	—
34	Ignition 8	—	W48	—	0.5	OEM-X2-71	—	—	—
4	Injector 4	—	W52	—	0.5	OEM-X2-39	—	—	—
5	Injector 5	—	W53	—	0.5	OEM-X2-18	—	—	—
6	Injector 6	—	W54	—	0.5	OEM-X2-19	—	—	—
7	Injector 7	—	W55	—	0.5	OEM-X2-40	—	—	—
8	Injector 8	—	W56	—	0.5	OEM-X2-17	—	—	—
9	DPO 1	—	W60	—	0.5	OEM-X1-59	—	—	—

NEXUSS3-C

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	Trigger +	—	W35	—	0.5	OEM-X2-68	—	—	—
10	AVI 1	—	W69	—	0.5	OEM-X1-41	—	—	—
11	AVI 2	—	W70	—	0.5	OEM-X2-58	—	—	—
12	AVI 3	—	W71	—	0.5	OEM-X1-29	—	—	—
13	AVI 4	—	W72	—	0.5	OEM-X2-65	—	—	—
14	AVI 5	—	W73	—	0.5	OEM-X1-32	—	—	—
15	AVI 6	—	W74	—	0.5	OEM-X2-63	—	—	—
16	AVI 7	—	W75	—	0.5	OEM-X1-10	—	—	—
17	AVI 8	—	W76	—	0.5	OEM-X1-69	—	—	—
18	AVI 9	—	W77	—	0.5	OEM-X2-57	—	—	—
19	SPI 5	—	—	—	—	—	—	—	—
2	Trigger -	—	W36	—	0.5	SP-0V-1	—	—	—
20	SPI 6	—	—	—	—	—	—	—	—
21	CAN 2 High	—	—	—	—	—	—	—	—
22	CAN 2 Low	—	—	—	—	—	—	—	—
23	Knock 1	—	W39	—	0.5	OEM-X2-26	—	—	—
24	Knock 2	—	W40	—	0.5	OEM-X2-27	—	—	—
25	+5V	—	W34	—	0.5	SP-5V1-1	—	—	—
26	Signal ground	—	W24	—	0.5	SP-0V-1	—	—	—
27	AVI 10	—	W78	—	0.5	OEM-X2-59	—	—	—
28	AVI 11	—	W79	—	0.5	OEM-X2-21	—	—	—
29	WBI 1 Heater +	—	—	—	—	—	—	—	—
3	Home +	—	W37	—	0.5	OEM-X2-64	—	—	—
30	WBI 1 Input	—	—	—	—	—	—	—	—
31	WBI 1 Pump	—	—	—	—	—	—	—	—
32	WBI 1 Nernst	—	—	—	—	—	—	—	—
33	WBI 1 Heater -	—	W66	—	0.5	OEM-X1-64	—	—	—
34	WBI 1 Cal	—	—	—	—	—	—	—	—
4	Home -	—	W38	—	0.5	SP-0V-1	—	—	—
5	SPI 1	—	W80	—	0.5	OEM-X1-71	—	—	—
6	SPI 2	—	W81	—	0.5	OEM-X1-72	—	—	—
7	SPI 3	—	W82	—	0.5	OEM-X1-9	—	—	—
8	SPI 4	—	W83	—	0.5	OEM-X2-33	—	—	—
9	+8V	—	—	—	—	—	—	—	—

OEM-X1

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
10	HO2S signal, bank 1 sensor 2 (post-cat)	—	W75	—	0.5	NEXUSS3-C-16	—	—	—
11	HO2S low reference, bank 1 sensor 2	—	W10	—	0.5	SP-0V-1	—	—	—
12	A/C refrigerant pressure signal	—	—	—	—	—	—	—	—
17	High speed cooling fan relay	—	W61	—	0.5	NEXUSS3-A-12	—	—	—
19	Ignition 1 voltage (key hot)	—	W1	—	0.85	SP-14V-1	—	—	—
20	Battery positive voltage (batt hot)	—	—	—	—	—	—	—	—
23	APP sensor low reference	—	W11	—	0.5	SP-0V-1	—	—	—
24	Fuel tank pressure signal	—	—	—	—	—	—	—	—
29	Accelerator pedal position (APP) sensor 1 signal	—	W71	—	0.5	NEXUSS3-C-12	—	—	—
30	APP sensor low reference	—	W12	—	0.5	SP-0V-1	—	—	—
32	Accelerator pedal position (APP) sensor 2 signal	—	W73	—	0.5	NEXUSS3-C-14	—	—	—
33	5V reference (fuel tank pressure)	—	W25	—	0.5	SP-5V1-1	—	—	—
34	5V reference (A/C pressure)	—	W26	—	0.5	SP-5V1-1	—	—	—
36	5V reference (APP sensor)	—	W27	—	0.5	SP-5V1-1	—	—	—
37	Intake air temperature (IAT) signal	—	—	—	—	—	—	—	—
38	Intake air temperature (IAT) low reference	—	W13	—	0.5	SP-0V-1	—	—	—
41	Mass air flow (MAF) signal	—	W69	—	0.5	NEXUSS3-C-10	—	—	—
47	Ignition 1 voltage (key hot)	—	W2	—	0.85	SP-14V-1	—	—	—
48	Tachometer output	—	—	—	—	—	—	—	—
49	HO2S low reference, bank 2 sensor 2	—	W14	—	0.5	SP-0V-1	—	—	—
50	Fuel pump relay control (primary)	—	W59	—	0.5	NEXUSS3-A-26	—	—	—
51	Fuel pump relay control (secondary)	—	W62	—	0.5	NEXUSS3-A-14	—	—	—
52	Starter enable relay control	—	W63	—	0.5	NEXUSS3-A-15	—	—	—
56	5V reference (APP sensor)	—	W28	—	0.5	SP-5V1-1	—	—	—
57	VSS output to ABS (128k)	—	—	—	—	—	—	—	—
58	Low speed cooling fan relay	—	W64	—	0.5	NEXUSS3-A-16	—	—	—
59	Powertrain relay coil control (main relay)	—	W60	—	0.5	NEXUSS3-A-9	—	—	—
61	EVAP canister vent solenoid	—	—	—	—	—	—	—	—
63	A/C compressor clutch relay	—	W65	—	0.5	NEXUSS3-A-17	—	—	—
64	HO2S heater low control, bank 2 sensor 2	—	W66	—	0.5	NEXUSS3-C-33	—	—	—
65	HO2S heater low control, bank 1 sensor 2	—	W67	—	0.5	NEXUSS3-A-21	—	—	—
68	Malfunction indicator lamp (MIL)	—	—	—	—	—	—	—	—
69	HO2S signal, bank 2 sensor 2 (post-cat)	—	W76	—	0.5	NEXUSS3-C-17	—	—	—
71	VSS high signal (manual trans)	—	W80	—	0.5	NEXUSS3-C-5	—	—	—
72	VSS low signal (manual trans)	—	W81	—	0.5	NEXUSS3-C-6	—	—	—
73	Power ground	—	W5	—	0.85	SP-GND-1	—	—	—
9	Brake switch signal	—	W82	—	0.5	NEXUSS3-C-7	—	—	—

OEM-X2

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
10	Cylinder shutoff solenoid 1 (AFM)	—	—	—	—	—	—	—	—
11	Cylinder shutoff solenoid 4 (AFM)	—	—	—	—	—	—	—	—
12	HO2S heater low control, bank 1 sensor 1	—	W68	—	0.5	NEXUSS3-A-22	—	—	—
13	HO2S heater low control, bank 2 sensor 1	—	—	—	—	—	—	—	—
14	Cylinder shutoff solenoid 2 (AFM)	—	—	—	—	—	—	—	—
16	Camshaft actuator solenoid (VVT)	—	—	—	—	—	—	—	—
17	Injector 8	—	W56	—	0.5	NEXUSS3-A-8	—	—	—
18	Injector 5	—	W53	—	0.5	NEXUSS3-A-5	—	—	—
19	Injector 6	—	W54	—	0.5	NEXUSS3-A-6	—	—	—
2	5V reference (crankshaft sensor)	—	W29	—	0.5	SP-5V1-1	—	—	—
20	Injector 1	—	W49	—	0.5	NEXUSS3-A-1	—	—	—
21	Engine coolant temperature (ECT) signal	—	W79	—	0.5	NEXUSS3-C-28	—	—	—
22	ECT low reference	—	W15	—	0.5	SP-0V-1	—	—	—
26	Knock sensor 1 signal A	—	W39	—	0.5	NEXUSS3-C-23	—	—	—
27	Knock sensor 1 signal B	—	W40	—	0.5	NEXUSS3-C-24	—	—	—
29	Knock sensor 2 signal A	—	—	—	—	—	—	—	—
3	5V reference (throttle body)	—	W30	—	0.5	SP-5V1-1	—	—	—
30	Knock sensor 2 signal B	—	—	—	—	—	—	—	—
32	Generator field duty control	—	—	—	—	—	—	—	—
33	Oil level switch signal	—	W83	—	0.5	NEXUSS3-C-8	—	—	—
34	Oil pressure low reference	—	W16	—	0.5	SP-0V-1	—	—	—
35	Throttle body low reference	—	W17	—	0.5	SP-0V-1	—	—	—
37	Injector 2	—	W50	—	0.5	NEXUSS3-A-2	—	—	—
38	Injector 3	—	W51	—	0.5	NEXUSS3-A-3	—	—	—
39	Injector 4	—	W52	—	0.5	NEXUSS3-A-4	—	—	—
40	Injector 7	—	W55	—	0.5	NEXUSS3-A-7	—	—	—
41	5V reference (oil pressure)	—	W31	—	0.5	SP-5V1-1	—	—	—
43	5V reference (MAP)	—	W32	—	0.5	SP-5V1-1	—	—	—
44	5V reference (camshaft sensor)	—	W33	—	0.5	SP-5V1-1	—	—	—
5	Throttle actuator motor control 2	—	W58	—	0.5	NEXUSS3-A-20	—	—	—
50	Engine oil pressure signal	—	—	—	—	—	—	—	—
52	Camshaft actuator low reference	—	W18	—	0.5	SP-0V-1	—	—	—
53	MAP low reference	—	W19	—	0.5	SP-0V-1	—	—	—
56	HO2S low reference, bank 1 sensor 1	—	W20	—	0.5	SP-0V-1	—	—	—
57	HO2S signal, bank 1 sensor 1 (pre-cat)	—	W77	—	0.5	NEXUSS3-C-18	—	—	—
58	Manifold absolute pressure (MAP) signal	—	W70	—	0.5	NEXUSS3-C-11	—	—	—
59	HO2S signal, bank 2 sensor 1 (pre-cat)	—	W78	—	0.5	NEXUSS3-C-27	—	—	—
6	Throttle actuator motor control 1	—	W57	—	0.5	NEXUSS3-A-19	—	—	—
60	HO2S low reference, bank 2 sensor 1	—	W21	—	0.5	SP-0V-1	—	—	—
61	Charge indicator signal	—	—	—	—	—	—	—	—
63	Throttle position sensor 2 signal	—	W74	—	0.5	NEXUSS3-C-15	—	—	—
64	Camshaft position signal (4x)	—	W37	—	0.5	NEXUSS3-C-3	—	—	—
65	Throttle position sensor 1 signal	—	W72	—	0.5	NEXUSS3-C-13	—	—	—
66	Camshaft position low reference	—	W22	—	0.5	SP-0V-1	—	—	—
68	Crankshaft position signal (58x)	—	W35	—	0.5	NEXUSS3-C-1	—	—	—
69	Crankshaft position low reference	—	W23	—	0.5	SP-0V-1	—	—	—
70	Ignition coil 1 control	—	W41	—	0.5	NEXUSS3-A-27	—	—	—
71	Ignition coil 8 control	—	W48	—	0.5	NEXUSS3-A-34	—	—	—
72	Ignition coil 7 control	—	W47	—	0.5	NEXUSS3-A-33	—	—	—
73	Ignition coil 2 control	—	W42	—	0.5	NEXUSS3-A-28	—	—	—
74	Ignition coil 6 control	—	W46	—	0.5	NEXUSS3-A-32	—	—	—
75	Ignition coil 5 control	—	W45	—	0.5	NEXUSS3-A-31	—	—	—
76	Ignition coil 4 control	—	W44	—	0.5	NEXUSS3-A-30	—	—	—
77	Ignition coil 3 control	—	W43	—	0.5	NEXUSS3-A-29	—	—	—
78	Coil low reference (odd bank)	—	W6	—	0.85	SP-GND-1	—	—	—
79	Coil low reference (even bank)	—	W7	—	0.85	SP-GND-1	—	—	—
8	EVAP canister purge solenoid	—	—	—	—	—	—	—	—
9	Cylinder shutoff solenoid 3 (AFM)	—	—	—	—	—	—	—	—

SP-0V

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W10	—	0.5	OEM-X1-11	—	—	—
1	—	—	W11	—	0.5	OEM-X1-23	—	—	—
1	—	—	W12	—	0.5	OEM-X1-30	—	—	—
1	—	—	W13	—	0.5	OEM-X1-38	—	—	—
1	—	—	W14	—	0.5	OEM-X1-49	—	—	—
1	—	—	W15	—	0.5	OEM-X2-22	—	—	—
1	—	—	W16	—	0.5	OEM-X2-34	—	—	—
1	—	—	W17	—	0.5	OEM-X2-35	—	—	—
1	—	—	W18	—	0.5	OEM-X2-52	—	—	—
1	—	—	W19	—	0.5	OEM-X2-53	—	—	—
1	—	—	W20	—	0.5	OEM-X2-56	—	—	—
1	—	—	W21	—	0.5	OEM-X2-60	—	—	—
1	—	—	W22	—	0.5	OEM-X2-66	—	—	—
1	—	—	W23	—	0.5	OEM-X2-69	—	—	—
1	—	—	W24	—	0.5	NEXUSS3-C-26	—	—	—
1	—	—	W36	—	0.5	NEXUSS3-C-2	—	—	—
1	—	—	W38	—	0.5	NEXUSS3-C-4	—	—	—

SP-14V

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W1	—	0.85	OEM-X1-19	—	—	—
1	—	—	W2	—	0.85	OEM-X1-47	—	—	—
1	—	—	W3	—	0.85	NEXUSS3-A-18	—	—	—
1	—	—	W4	—	0.85	NEXUSS3-A-25	—	—	—

SP-5V1

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W25	—	0.5	OEM-X1-33	—	—	—
1	—	—	W26	—	0.5	OEM-X1-34	—	—	—
1	—	—	W27	—	0.5	OEM-X1-36	—	—	—
1	—	—	W28	—	0.5	OEM-X1-56	—	—	—
1	—	—	W29	—	0.5	OEM-X2-2	—	—	—
1	—	—	W30	—	0.5	OEM-X2-3	—	—	—
1	—	—	W31	—	0.5	OEM-X2-41	—	—	—
1	—	—	W32	—	0.5	OEM-X2-43	—	—	—
1	—	—	W33	—	0.5	OEM-X2-44	—	—	—
1	—	—	W34	—	0.5	NEXUSS3-C-25	—	—	—

SP-GND

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W5	—	0.85	OEM-X1-73	—	—	—
1	—	—	W6	—	0.85	OEM-X2-78	—	—	—
1	—	—	W7	—	0.85	OEM-X2-79	—	—	—
1	—	—	W8	—	0.85	NEXUSS3-A-10	—	—	—
1	—	—	W9	—	0.85	NEXUSS3-A-11	—	—	—

Pin map

OEM point	OEM function	OEM family	Target point	Target function	Target family	Evidence
OEM-X1-10	HO2S signal, bank 1 sensor 2 (post-cat)	lambda_nb_in	NEXUSS3-C-16	AVI 7	analog_in	single_source
OEM-X1-11	HO2S low reference, bank 1 sensor 2	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X1-12	A/C refrigerant pressure signal	analog_in	—	—	—	corroborated
OEM-X1-17	High speed cooling fan relay	low_side_out	NEXUSS3-A-12	DPO 2	low_side_out	corroborated
OEM-X1-19	Ignition 1 voltage (key hot)	power_in	NEXUSS3-A-18 + NEXUSS3-A-25	+12V switched input + +12V switched input	power_in	single_source
OEM-X1-20	Battery positive voltage (batt hot)	power_in	—	—	—	single_source
OEM-X1-23	APP sensor low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X1-24	Fuel tank pressure signal	analog_in	—	—	—	corroborated
OEM-X1-29	Accelerator pedal position (APP) sensor 1 signal	analog_in	NEXUSS3-C-12	AVI 3	analog_in	single_source
OEM-X1-30	APP sensor low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X1-32	Accelerator pedal position (APP) sensor 2 signal	analog_in	NEXUSS3-C-14	AVI 5	analog_in	single_source
OEM-X1-33	5V reference (fuel tank pressure)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X1-34	5V reference (A/C pressure)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X1-36	5V reference (APP sensor)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X1-37	Intake air temperature (IAT) signal	temp_in	—	—	—	corroborated
OEM-X1-38	Intake air temperature (IAT) low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X1-41	Mass air flow (MAF) signal	analog_in	NEXUSS3-C-10	AVI 1	analog_in	corroborated
OEM-X1-47	Ignition 1 voltage (key hot)	power_in	NEXUSS3-A-18 + NEXUSS3-A-25	+12V switched input + +12V switched input	power_in	single_source
OEM-X1-48	Tachometer output	tacho_out	—	—	—	corroborated
OEM-X1-49	HO2S low reference, bank 2 sensor 2	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X1-50	Fuel pump relay control (primary)	low_side_out	NEXUSS3-A-26	ECR output	low_side_out	corroborated
OEM-X1-51	Fuel pump relay control (secondary)	low_side_out	NEXUSS3-A-14	DPO 3	low_side_out	corroborated
OEM-X1-52	Starter enable relay control	low_side_out	NEXUSS3-A-15	DPO 4	low_side_out	corroborated
OEM-X1-56	5V reference (APP sensor)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X1-57	VSS output to ABS (128k)	tacho_out	—	—	—	corroborated
OEM-X1-58	Low speed cooling fan relay	low_side_out	NEXUSS3-A-16	DPO 5	low_side_out	corroborated
OEM-X1-59	Powertrain relay coil control (main relay)	low_side_out	NEXUSS3-A-9	DPO 1	low_side_out	corroborated
OEM-X1-61	EVAP canister vent solenoid	low_side_out	—	—	—	corroborated
OEM-X1-63	A/C compressor clutch relay	low_side_out	NEXUSS3-A-17	DPO 6	low_side_out	corroborated
OEM-X1-64	HO2S heater low control, bank 2 sensor 2	low_side_out	NEXUSS3-C-33	WBI 1 Heater -	low_side_out	single_source
OEM-X1-65	HO2S heater low control, bank 1 sensor 2	low_side_out	NEXUSS3-A-21	HBO 3	hbridge_out	single_source
OEM-X1-68	Malfunction indicator lamp (MIL)	low_side_out	—	—	—	corroborated
OEM-X1-69	HO2S signal, bank 2 sensor 2 (post-cat)	lambda_nb_in	NEXUSS3-C-17	AVI 8	analog_in	single_source
OEM-X1-71	VSS high signal (manual trans)	digital_in	NEXUSS3-C-5	SPI 1	digital_in	corroborated
OEM-X1-72	VSS low signal (manual trans)	digital_in	NEXUSS3-C-6	SPI 2	digital_in	corroborated
OEM-X1-73	Power ground	ground	NEXUSS3-A-10 + NEXUSS3-A-11	Battery ground + Battery ground	ground	single_source
OEM-X1-9	Brake switch signal	digital_in	NEXUSS3-C-7	SPI 3	digital_in	corroborated
OEM-X2-10	Cylinder shutoff solenoid 1 (AFM)	low_side_out	—	—	—	corroborated
OEM-X2-11	Cylinder shutoff solenoid 4 (AFM)	low_side_out	—	—	—	corroborated
OEM-X2-12	HO2S heater low control, bank 1 sensor 1	low_side_out	NEXUSS3-A-22	HBO 4	hbridge_out	single_source
OEM-X2-13	HO2S heater low control, bank 2 sensor 1	low_side_out	—	—	—	single_source
OEM-X2-14	Cylinder shutoff solenoid 2 (AFM)	low_side_out	—	—	—	corroborated
OEM-X2-16	Camshaft actuator solenoid (VVT)	low_side_out	—	—	—	corroborated
OEM-X2-17	Injector 8	injector_out	NEXUSS3-A-8	Injector 8	injector_out	single_source
OEM-X2-18	Injector 5	injector_out	NEXUSS3-A-5	Injector 5	injector_out	single_source
OEM-X2-19	Injector 6	injector_out	NEXUSS3-A-6	Injector 6	injector_out	single_source
OEM-X2-2	5V reference (crankshaft sensor)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X2-20	Injector 1	injector_out	NEXUSS3-A-1	Injector 1	injector_out	single_source
OEM-X2-21	Engine coolant temperature (ECT) signal	temp_in	NEXUSS3-C-28	AVI 11	analog_in	corroborated
OEM-X2-22	ECT low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-26	Knock sensor 1 signal A	knock_in	NEXUSS3-C-23	Knock 1	knock_in	corroborated
OEM-X2-27	Knock sensor 1 signal B	knock_in	NEXUSS3-C-24	Knock 2	knock_in	single_source
OEM-X2-29	Knock sensor 2 signal A	knock_in	—	—	—	corroborated
OEM-X2-3	5V reference (throttle body)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X2-30	Knock sensor 2 signal B	knock_in	—	—	—	single_source
OEM-X2-32	Generator field duty control	low_side_out	—	—	—	corroborated
OEM-X2-33	Oil level switch signal	digital_in	NEXUSS3-C-8	SPI 4	digital_in	corroborated
OEM-X2-34	Oil pressure low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-35	Throttle body low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-37	Injector 2	injector_out	NEXUSS3-A-2	Injector 2	injector_out	single_source
OEM-X2-38	Injector 3	injector_out	NEXUSS3-A-3	Injector 3	injector_out	single_source
OEM-X2-39	Injector 4	injector_out	NEXUSS3-A-4	Injector 4	injector_out	single_source
OEM-X2-40	Injector 7	injector_out	NEXUSS3-A-7	Injector 7	injector_out	single_source
OEM-X2-41	5V reference (oil pressure)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X2-43	5V reference (MAP)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X2-44	5V reference (camshaft sensor)	vref	NEXUSS3-C-25	+5V	vref	single_source
OEM-X2-5	Throttle actuator motor control 2	hbridge_out	NEXUSS3-A-20	HBO 2	hbridge_out	corroborated
OEM-X2-50	Engine oil pressure signal	analog_in	—	—	—	corroborated
OEM-X2-52	Camshaft actuator low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-53	MAP low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-56	HO2S low reference, bank 1 sensor 1	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-57	HO2S signal, bank 1 sensor 1 (pre-cat)	lambda_nb_in	NEXUSS3-C-18	AVI 9	analog_in	single_source
OEM-X2-58	Manifold absolute pressure (MAP) signal	analog_in	NEXUSS3-C-11	AVI 2	analog_in	corroborated
OEM-X2-59	HO2S signal, bank 2 sensor 1 (pre-cat)	lambda_nb_in	NEXUSS3-C-27	AVI 10	analog_in	single_source
OEM-X2-6	Throttle actuator motor control 1	hbridge_out	NEXUSS3-A-19	HBO 1	hbridge_out	corroborated
OEM-X2-60	HO2S low reference, bank 2 sensor 1	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-61	Charge indicator signal	low_side_out	—	—	—	corroborated
OEM-X2-63	Throttle position sensor 2 signal	analog_in	NEXUSS3-C-15	AVI 6	analog_in	single_source
OEM-X2-64	Camshaft position signal (4x)	trigger_in	NEXUSS3-C-3	Home +	trigger_in	single_source
OEM-X2-65	Throttle position sensor 1 signal	analog_in	NEXUSS3-C-13	AVI 4	analog_in	single_source
OEM-X2-66	Camshaft position low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-68	Crankshaft position signal (58x)	trigger_in	NEXUSS3-C-1	Trigger +	trigger_in	single_source
OEM-X2-69	Crankshaft position low reference	sensor_ground	NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4	Trigger - + Signal ground + Home -	sensor_ground + trigger_in	single_source
OEM-X2-70	Ignition coil 1 control	ignition_out	NEXUSS3-A-27	Ignition 1	ignition_out	single_source
OEM-X2-71	Ignition coil 8 control	ignition_out	NEXUSS3-A-34	Ignition 8	ignition_out	single_source
OEM-X2-72	Ignition coil 7 control	ignition_out	NEXUSS3-A-33	Ignition 7	ignition_out	single_source
OEM-X2-73	Ignition coil 2 control	ignition_out	NEXUSS3-A-28	Ignition 2	ignition_out	single_source
OEM-X2-74	Ignition coil 6 control	ignition_out	NEXUSS3-A-32	Ignition 6	ignition_out	single_source
OEM-X2-75	Ignition coil 5 control	ignition_out	NEXUSS3-A-31	Ignition 5	ignition_out	single_source
OEM-X2-76	Ignition coil 4 control	ignition_out	NEXUSS3-A-30	Ignition 4	ignition_out	single_source
OEM-X2-77	Ignition coil 3 control	ignition_out	NEXUSS3-A-29	Ignition 3	ignition_out	single_source
OEM-X2-78	Coil low reference (odd bank)	ground	NEXUSS3-A-10 + NEXUSS3-A-11	Battery ground + Battery ground	ground	single_source
OEM-X2-79	Coil low reference (even bank)	ground	NEXUSS3-A-10 + NEXUSS3-A-11	Battery ground + Battery ground	ground	single_source
OEM-X2-8	EVAP canister purge solenoid	low_side_out	—	—	—	corroborated
OEM-X2-9	Cylinder shutoff solenoid 3 (AFM)	low_side_out	—	—	—	corroborated

Cut list

Wire	From	To	Gauge (mm²)	Length	Signal	Ident
W1	OEM-X1-19	SP-14V-1	0.85	no route	Ignition 1 voltage (key hot)	—
W2	OEM-X1-47	SP-14V-1	0.85	no route	Ignition 1 voltage (key hot)	—
W3	SP-14V-1	NEXUSS3-A-18	0.85	no route	+12V switched input	—
W4	SP-14V-1	NEXUSS3-A-25	0.85	no route	+12V switched input	—
W5	OEM-X1-73	SP-GND-1	0.85	no route	Power ground	—
W6	OEM-X2-78	SP-GND-1	0.85	no route	Coil low reference (odd bank)	—
W7	OEM-X2-79	SP-GND-1	0.85	no route	Coil low reference (even bank)	—
W8	SP-GND-1	NEXUSS3-A-10	0.85	no route	Battery ground	—
W9	SP-GND-1	NEXUSS3-A-11	0.85	no route	Battery ground	—
W10	OEM-X1-11	SP-0V-1	0.5	no route	HO2S low reference, bank 1 sensor 2	—
W11	OEM-X1-23	SP-0V-1	0.5	no route	APP sensor low reference	—
W12	OEM-X1-30	SP-0V-1	0.5	no route	APP sensor low reference	—
W13	OEM-X1-38	SP-0V-1	0.5	no route	Intake air temperature (IAT) low reference	—
W14	OEM-X1-49	SP-0V-1	0.5	no route	HO2S low reference, bank 2 sensor 2	—
W15	OEM-X2-22	SP-0V-1	0.5	no route	ECT low reference	—
W16	OEM-X2-34	SP-0V-1	0.5	no route	Oil pressure low reference	—
W17	OEM-X2-35	SP-0V-1	0.5	no route	Throttle body low reference	—
W18	OEM-X2-52	SP-0V-1	0.5	no route	Camshaft actuator low reference	—
W19	OEM-X2-53	SP-0V-1	0.5	no route	MAP low reference	—
W20	OEM-X2-56	SP-0V-1	0.5	no route	HO2S low reference, bank 1 sensor 1	—
W21	OEM-X2-60	SP-0V-1	0.5	no route	HO2S low reference, bank 2 sensor 1	—
W22	OEM-X2-66	SP-0V-1	0.5	no route	Camshaft position low reference	—
W23	OEM-X2-69	SP-0V-1	0.5	no route	Crankshaft position low reference	—
W24	SP-0V-1	NEXUSS3-C-26	0.5	no route	Signal ground	—
W25	OEM-X1-33	SP-5V1-1	0.5	no route	5V reference (fuel tank pressure)	—
W26	OEM-X1-34	SP-5V1-1	0.5	no route	5V reference (A/C pressure)	—
W27	OEM-X1-36	SP-5V1-1	0.5	no route	5V reference (APP sensor)	—
W28	OEM-X1-56	SP-5V1-1	0.5	no route	5V reference (APP sensor)	—
W29	OEM-X2-2	SP-5V1-1	0.5	no route	5V reference (crankshaft sensor)	—
W30	OEM-X2-3	SP-5V1-1	0.5	no route	5V reference (throttle body)	—
W31	OEM-X2-41	SP-5V1-1	0.5	no route	5V reference (oil pressure)	—
W32	OEM-X2-43	SP-5V1-1	0.5	no route	5V reference (MAP)	—
W33	OEM-X2-44	SP-5V1-1	0.5	no route	5V reference (camshaft sensor)	—
W34	SP-5V1-1	NEXUSS3-C-25	0.5	no route	+5V	—
W35	OEM-X2-68	NEXUSS3-C-1	0.5	no route	Crankshaft position signal (58x)	—
W36	SP-0V-1	NEXUSS3-C-2	0.5	no route	Trigger -	—
W37	OEM-X2-64	NEXUSS3-C-3	0.5	no route	Camshaft position signal (4x)	—
W38	SP-0V-1	NEXUSS3-C-4	0.5	no route	Home -	—
W39	OEM-X2-26	NEXUSS3-C-23	0.5	no route	Knock sensor 1 signal A	—
W40	OEM-X2-27	NEXUSS3-C-24	0.5	no route	Knock sensor 1 signal B	—
W41	OEM-X2-70	NEXUSS3-A-27	0.5	no route	Ignition coil 1 control	—
W42	OEM-X2-73	NEXUSS3-A-28	0.5	no route	Ignition coil 2 control	—
W43	OEM-X2-77	NEXUSS3-A-29	0.5	no route	Ignition coil 3 control	—
W44	OEM-X2-76	NEXUSS3-A-30	0.5	no route	Ignition coil 4 control	—
W45	OEM-X2-75	NEXUSS3-A-31	0.5	no route	Ignition coil 5 control	—
W46	OEM-X2-74	NEXUSS3-A-32	0.5	no route	Ignition coil 6 control	—
W47	OEM-X2-72	NEXUSS3-A-33	0.5	no route	Ignition coil 7 control	—
W48	OEM-X2-71	NEXUSS3-A-34	0.5	no route	Ignition coil 8 control	—
W49	OEM-X2-20	NEXUSS3-A-1	0.5	no route	Injector 1	—
W50	OEM-X2-37	NEXUSS3-A-2	0.5	no route	Injector 2	—
W51	OEM-X2-38	NEXUSS3-A-3	0.5	no route	Injector 3	—
W52	OEM-X2-39	NEXUSS3-A-4	0.5	no route	Injector 4	—
W53	OEM-X2-18	NEXUSS3-A-5	0.5	no route	Injector 5	—
W54	OEM-X2-19	NEXUSS3-A-6	0.5	no route	Injector 6	—
W55	OEM-X2-40	NEXUSS3-A-7	0.5	no route	Injector 7	—
W56	OEM-X2-17	NEXUSS3-A-8	0.5	no route	Injector 8	—
W57	OEM-X2-6	NEXUSS3-A-19	0.5	no route	Throttle actuator motor control 1	—
W58	OEM-X2-5	NEXUSS3-A-20	0.5	no route	Throttle actuator motor control 2	—
W59	OEM-X1-50	NEXUSS3-A-26	0.5	no route	Fuel pump relay control (primary)	—
W60	OEM-X1-59	NEXUSS3-A-9	0.5	no route	Powertrain relay coil control (main relay)	—
W61	OEM-X1-17	NEXUSS3-A-12	0.5	no route	High speed cooling fan relay	—
W62	OEM-X1-51	NEXUSS3-A-14	0.5	no route	Fuel pump relay control (secondary)	—
W63	OEM-X1-52	NEXUSS3-A-15	0.5	no route	Starter enable relay control	—
W64	OEM-X1-58	NEXUSS3-A-16	0.5	no route	Low speed cooling fan relay	—
W65	OEM-X1-63	NEXUSS3-A-17	0.5	no route	A/C compressor clutch relay	—
W66	OEM-X1-64	NEXUSS3-C-33	0.5	no route	HO2S heater low control, bank 2 sensor 2	—
W67	OEM-X1-65	NEXUSS3-A-21	0.5	no route	HO2S heater low control, bank 1 sensor 2	—
W68	OEM-X2-12	NEXUSS3-A-22	0.5	no route	HO2S heater low control, bank 1 sensor 1	—
W69	OEM-X1-41	NEXUSS3-C-10	0.5	no route	Mass air flow (MAF) signal	—
W70	OEM-X2-58	NEXUSS3-C-11	0.5	no route	Manifold absolute pressure (MAP) signal	—
W71	OEM-X1-29	NEXUSS3-C-12	0.5	no route	Accelerator pedal position (APP) sensor 1 signal	—
W72	OEM-X2-65	NEXUSS3-C-13	0.5	no route	Throttle position sensor 1 signal	—
W73	OEM-X1-32	NEXUSS3-C-14	0.5	no route	Accelerator pedal position (APP) sensor 2 signal	—
W74	OEM-X2-63	NEXUSS3-C-15	0.5	no route	Throttle position sensor 2 signal	—
W75	OEM-X1-10	NEXUSS3-C-16	0.5	no route	HO2S signal, bank 1 sensor 2 (post-cat)	—
W76	OEM-X1-69	NEXUSS3-C-17	0.5	no route	HO2S signal, bank 2 sensor 2 (post-cat)	—
W77	OEM-X2-57	NEXUSS3-C-18	0.5	no route	HO2S signal, bank 1 sensor 1 (pre-cat)	—
W78	OEM-X2-59	NEXUSS3-C-27	0.5	no route	HO2S signal, bank 2 sensor 1 (pre-cat)	—
W79	OEM-X2-21	NEXUSS3-C-28	0.5	no route	Engine coolant temperature (ECT) signal	—
W80	OEM-X1-71	NEXUSS3-C-5	0.5	no route	VSS high signal (manual trans)	—
W81	OEM-X1-72	NEXUSS3-C-6	0.5	no route	VSS low signal (manual trans)	—
W82	OEM-X1-9	NEXUSS3-C-7	0.5	no route	Brake switch signal	—
W83	OEM-X2-33	NEXUSS3-C-8	0.5	no route	Oil level switch signal	—

Bill of materials

Category	Part number	Manufacturer	Description	Qty	Unit

ECU setup sheet

Role	Engine ref	Engine signal	Sensor	ECU point	ECU function	ECU class	Setup flag
No configured channels.

Findings

Open (7)

Severity	Code	Subject	Message
warn	DBW_MOTOR_CURRENT	NEXUSS3-A-19	Cannot confirm Nexus S3 can drive the throttle motor: NEXUSS3-A-19 "HBO 1" is rated 8.0 A, but the motor current at OEM-X2-6 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A).
warn	DBW_MOTOR_CURRENT	NEXUSS3-A-20	Cannot confirm Nexus S3 can drive the throttle motor: NEXUSS3-A-20 "HBO 2" is rated 8.0 A, but the motor current at OEM-X2-5 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A).
warn	NET_FAMILY	OEM-X1-65 ↔ NEXUSS3-A-21	OEM-X1-65 "HO2S heater low control, bank 1 sensor 2" [low_side_out] is wired to NEXUSS3-A-21 "HBO 3" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warn	NET_FAMILY	OEM-X2-12 ↔ NEXUSS3-A-22	OEM-X2-12 "HO2S heater low control, bank 1 sensor 1" [low_side_out] is wired to NEXUSS3-A-22 "HBO 4" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
info	NET_FAMILY	OEM-X2-21 ↔ NEXUSS3-C-28	OEM-X2-21 "Engine coolant temperature (ECT) signal" [temp_in] is wired to NEXUSS3-C-28 "AVI 11" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
info	NET_FAMILY	OEM-X2-35 ↔ NEXUSS3-C-2	OEM-X2-35 "Throttle body low reference" [sensor_ground] is wired to NEXUSS3-C-2 "Trigger -" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs.
info	UNMAPPED	OEM	19 optional OEM pins are not mapped: OEM-X1-12 A/C refrigerant pressure signal; OEM-X1-24 Fuel tank pressure signal; OEM-X1-37 Intake air temperature (IAT) signal; OEM-X1-48 Tachometer output; OEM-X1-57 VSS output to ABS (128k); OEM-X1-61 EVAP canister vent solenoid; OEM-X1-68 Malfunction indicator lamp (MIL); OEM-X2-10 Cylinder shutoff solenoid 1 (AFM); OEM-X2-11 Cylinder shutoff solenoid 4 (AFM); OEM-X2-13 HO2S heater low control, bank 2 sensor 1; OEM-X2-14 Cylinder shutoff solenoid 2 (AFM); OEM-X2-16 Camshaft actuator solenoid (VVT); OEM-X2-29 Knock sensor 2 signal A; OEM-X2-30 Knock sensor 2 signal B; OEM-X2-32 Generator field duty control; OEM-X2-50 Engine oil pressure signal; OEM-X2-61 Charge indicator signal; OEM-X2-8 EVAP canister purge solenoid; OEM-X2-9 Cylinder shutoff solenoid 3 (AFM)

Accepted (1)

Code	Subject	Reason	By
REQUIRED_UNMAPPED	OEM-X1-20	Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed.	mapping-proposal

Notes

Auto-mapped by auto_map() from the library pin data on 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-X1 20: Battery positive voltage (batt hot): Haltech Nexus S3 has no battery-constant input; not needed - OEM-X2 29: Knock sensor 2 signal A: no free knock input on Haltech Nexus S3 - OEM-X2 30: Knock sensor 2 signal B: no free knock input on Haltech Nexus S3 - OEM-X2 13: HO2S heater low control, bank 2 sensor 1: no free heater_low_side/low_side/ls_hs/hbridge on Haltech Nexus S3 - OEM-X2 10: Cylinder shutoff solenoid 1 (AFM): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 14: Cylinder shutoff solenoid 2 (AFM): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 9: Cylinder shutoff solenoid 3 (AFM): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 11: Cylinder shutoff solenoid 4 (AFM): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X1 61: EVAP canister vent solenoid: no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X1 68: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 16: Camshaft actuator solenoid (VVT): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 32: Generator field duty control: no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 61: Charge indicator signal: no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X2 8: EVAP canister purge solenoid: no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-X1 48: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on Haltech Nexus S3 - OEM-X1 57: VSS output to ABS (128k): no free frequency_out/tacho/low_side/ls_hs on Haltech Nexus S3 - OEM-X1 37: Intake air temperature (IAT) signal: no free thermistor/analog_0_5 on Haltech Nexus S3 - OEM-X1 12: A/C refrigerant pressure signal: no free analog_0_5 on Haltech Nexus S3 - OEM-X1 24: Fuel tank pressure signal: no free analog_0_5 on Haltech Nexus S3 - OEM-X2 50: Engine oil pressure signal: no free analog_0_5 on Haltech Nexus S3 - NEXUSS3-A 13: Ignition switch input: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source

Sources

Reliability	Kind	Title	URL	Archive	Captured	SHA-256
4	vendor_doc	Haltech: Nexus S3 Plug 'n' Play adapter QSG (Subaru WRX/STI ADM, HT-186300) — ECU Connector A & C pinout	https://www.haltech.com/product/ht-186300-nexus-s3-plug-n-play-adapter-harness/	archive	2026-10-05	3cab7cd337c2
4	vendor_doc	Haltech: Nexus S3/S2 ECU Overview (QSG) — specifications	https://store.haltech.com/product/ht-213000-nexus-s3-ecu-only/	archive	2026-10-05	388299668207
4	vendor_doc	MaxxECU webhelp: Wiring — plug-in ECU Chevrolet Corvette C6 (GM E38 ECM)	http://www.maxxecu.com/webhelp/wirings-pluginecu-chevrolet_corvette_c6_e38_ecm.html	—	—	—
2	community_copy	lt1swap.com: E38 ECM Connector Pinouts	https://lt1swap.com/E38 ECM Connector Pinouts.htm	—	—	—