Chevrolet Corvette C6 2005-13 (LS2/LS3/LS7) → Motorsport Electronics ME221 (auto)

Chevrolet Corvette C6 2005-13 (LS2/LS3/LS7) — Motorsport Electronics — ME221

⚠ NOT CHECKED. Don't build from this.

Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-11

Before you start

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.

Status	draft · not yet verified: nobody has reported building and running this harness
Open errors	12: read the Findings page before cutting any wire
Size of the job	76 wires · 7 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	ME221-C1-15	0.85	☐	☐	☐	☐	☐	☐	☐
W4	SP-14V-1	ME221-C1-64	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	ME221-C1-10	0.85	☐	☐	☐	☐	☐	☐	☐
W9	SP-GND-1	ME221-C1-61	0.85	☐	☐	☐	☐	☐	☐	☐
W10	SP-GND-1	ME221-C1-89	0.85	☐	☐	☐	☐	☐	☐	☐
W11	SP-GND-1	ME221-C1-90	0.85	☐	☐	☐	☐	☐	☐	☐
W12	OEM-X1-11	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W13	OEM-X1-13	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W14	OEM-X1-23	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W15	OEM-X1-30	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W16	OEM-X1-31	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W17	OEM-X1-38	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W18	OEM-X1-49	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W19	OEM-X2-22	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W20	OEM-X2-34	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W21	OEM-X2-35	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W22	OEM-X2-52	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W23	OEM-X2-53	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W24	OEM-X2-56	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W25	OEM-X2-60	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W26	OEM-X2-66	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W27	OEM-X2-69	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W28	SP-0V-1	ME221-C1-52	0.5	☐	☐	☐	☐	☐	☐	☐
W29	SP-0V-1	ME221-C1-84	0.5	☐	☐	☐	☐	☐	☐	☐
W30	OEM-X1-33	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W31	OEM-X1-34	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W32	OEM-X1-36	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W33	OEM-X1-56	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W34	OEM-X2-2	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W35	OEM-X2-3	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W36	OEM-X2-41	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W37	OEM-X2-43	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W38	OEM-X2-44	SP-5V1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W39	SP-5V1-1	ME221-C1-45	0.5	☐	☐	☐	☐	☐	☐	☐
W40	OEM-X2-68	ME221-C1-80	0.5	☐	☐	☐	☐	☐	☐	☐
W41	OEM-X2-64	ME221-C1-22	0.5	☐	☐	☐	☐	☐	☐	☐
W42	OEM-X2-26	ME221-C1-53	0.5	☐	☐	☐	☐	☐	☐	☐
W43	OEM-X2-70	ME221-C1-32	0.5	☐	☐	☐	☐	☐	☐	☐
W44	OEM-X2-73	ME221-C1-31	0.5	☐	☐	☐	☐	☐	☐	☐
W45	OEM-X2-77	ME221-C1-2	0.5	☐	☐	☐	☐	☐	☐	☐
W46	OEM-X2-76	ME221-C1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W47	OEM-X2-20	ME221-C1-63	0.5	☐	☐	☐	☐	☐	☐	☐
W48	OEM-X2-37	ME221-C1-4	0.5	☐	☐	☐	☐	☐	☐	☐
W49	OEM-X2-38	ME221-C1-33	0.5	☐	☐	☐	☐	☐	☐	☐
W50	OEM-X2-39	ME221-C1-3	0.5	☐	☐	☐	☐	☐	☐	☐
W51	OEM-X2-18	ME221-C1-63	0.5	☐	☐	☐	☐	☐	☐	☐
W52	OEM-X2-19	ME221-C1-4	0.5	☐	☐	☐	☐	☐	☐	☐
W53	OEM-X2-40	ME221-C1-33	0.5	☐	☐	☐	☐	☐	☐	☐
W54	OEM-X2-17	ME221-C1-3	0.5	☐	☐	☐	☐	☐	☐	☐
W55	OEM-X1-50	ME221-C1-37	0.5	☐	☐	☐	☐	☐	☐	☐
W56	OEM-X1-59	ME221-C1-42	0.5	☐	☐	☐	☐	☐	☐	☐
W57	OEM-X1-41	ME221-C1-26	0.5	☐	☐	☐	☐	☐	☐	☐
W58	OEM-X2-58	ME221-C1-56	0.5	☐	☐	☐	☐	☐	☐	☐
W59	OEM-X1-29	ME221-C1-17	0.5	☐	☐	☐	☐	☐	☐	☐
W60	OEM-X2-65	ME221-C1-18	0.5	☐	☐	☐	☐	☐	☐	☐
W61	OEM-X2-21	ME221-C1-86	0.5	☐	☐	☐	☐	☐	☐	☐
W62	OEM-X1-17	ME221-C1-72	0.5	☐	☐	☐	☐	☐	☐	☐
W63	OEM-X1-51	ME221-C1-43	0.5	☐	☐	☐	☐	☐	☐	☐
W64	OEM-X1-52	ME221-C1-73	0.5	☐	☐	☐	☐	☐	☐	☐
W65	OEM-X1-58	ME221-C1-12	0.5	☐	☐	☐	☐	☐	☐	☐
W66	OEM-X1-63	ME221-C1-74	0.5	☐	☐	☐	☐	☐	☐	☐
W67	OEM-X1-64	ME221-C1-16	0.5	☐	☐	☐	☐	☐	☐	☐
W68	OEM-X1-65	ME221-C1-44	0.5	☐	☐	☐	☐	☐	☐	☐
W69	OEM-X2-12	ME221-C1-69	0.5	☐	☐	☐	☐	☐	☐	☐
W70	OEM-X2-13	ME221-C1-39	0.5	☐	☐	☐	☐	☐	☐	☐
W71	OEM-X1-48	ME221-C1-79	0.5	☐	☐	☐	☐	☐	☐	☐
W72	OEM-X1-37	ME221-C1-57	0.5	☐	☐	☐	☐	☐	☐	☐
W73	OEM-X1-71	ME221-C1-6	0.5	☐	☐	☐	☐	☐	☐	☐
W74	OEM-X1-72	ME221-C1-7	0.5	☐	☐	☐	☐	☐	☐	☐
W75	OEM-X1-28	ME221-C1-21	0.5	☐	☐	☐	☐	☐	☐	☐
W76	OEM-X1-27	ME221-C1-51	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	ME221-C1-15	ME221-C1-10	open (OL)	+12 V supply must not touch power ground
2	ME221-C1-45	ME221-C1-10	open (OL)	5 V sensor reference must not touch power ground
3	ME221-C1-15	ME221-C1-45	open (OL)	+12 V supply must not touch 5 V sensor reference
4	ME221-C1-52	ME221-C1-15	open (OL)	sensor ground must not touch +12 V supply
5	ME221-C1-52	ME221-C1-45	open (OL)	sensor ground must not touch 5 V sensor reference

If any reading doesn't match, stop and get help before powering up.

Revisions

Rev	Label	By	Date
No revisions yet.

Schematic

Connectors

ME221-C1

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	COIL 4	—	W46	—	0.5	OEM-X2-76	—	—	—
10	GROUND CHASSIS	—	W8	—	0.85	SP-GND-1	—	—	—
12	LOW SIDE 2	—	W65	—	0.5	OEM-X1-58	—	—	—
14	LSU +12V	—	—	—	—	—	—	—	—
15	IGN +12V	—	W3	—	0.85	SP-14V-1	—	—	—
16	LSU HEATER -VE	—	W67	—	0.5	OEM-X1-64	—	—	—
17	ANA VOLT 3	—	W59	—	0.5	OEM-X1-29	—	—	—
18	ANA VOLT 4	—	W60	—	0.5	OEM-X2-65	—	—	—
19	LSU UN	—	—	—	—	—	—	—	—
2	COIL 3	—	W45	—	0.5	OEM-X2-77	—	—	—
20	LSU VM	—	—	—	—	—	—	—	—
21	CAN 1 HIGH	—	W75	—	0.5	OEM-X1-28	—	—	—
22	CAM A VR+	—	W41	—	0.5	OEM-X2-64	—	—	—
23	CAM A VR-	—	—	—	—	—	—	—	—
24	SERIAL 1 GROUND	—	—	—	—	—	—	—	—
25	SERIAL 1 TX	—	—	—	—	—	—	—	—
26	ANA VOLT 1	—	W57	—	0.5	OEM-X1-41	—	—	—
3	INJECTOR 4	—	W50	—	0.5	OEM-X2-39	—	—	—
3	INJECTOR 4	—	W54	—	0.5	OEM-X2-17	—	—	—
31	COIL 2	—	W44	—	0.5	OEM-X2-73	—	—	—
32	COIL 1	—	W43	—	0.5	OEM-X2-70	—	—	—
33	INJECTOR 3	—	W49	—	0.5	OEM-X2-38	—	—	—
33	INJECTOR 3	—	W53	—	0.5	OEM-X2-40	—	—	—
35	USB D+	—	—	—	—	—	—	—	—
36	USB D-	—	—	—	—	—	—	—	—
37	LOW SIDE RELAY 11	—	W55	—	0.5	OEM-X1-50	—	—	—
38	USB VBUS	—	—	—	—	—	—	—	—
39	LOW SIDE 6	—	W70	—	0.5	OEM-X2-13	—	—	—
4	INJECTOR 2	—	W48	—	0.5	OEM-X2-37	—	—	—
4	INJECTOR 2	—	W52	—	0.5	OEM-X2-19	—	—	—
41	USB GROUND	—	—	—	—	—	—	—	—
42	LOW SIDE RELAY 12	—	W56	—	0.5	OEM-X1-59	—	—	—
43	LOW SIDE RELAY 14	—	W63	—	0.5	OEM-X1-51	—	—	—
44	LOW SIDE 4	—	W68	—	0.5	OEM-X1-65	—	—	—
45	5V REF	—	W39	—	0.5	SP-5V1-1	—	—	—
46	5V REF	—	—	—	—	—	—	—	—
49	LSU IA	—	—	—	—	—	—	—	—
50	LSU IP	—	—	—	—	—	—	—	—
51	CAN 1 LOW	—	W76	—	0.5	OEM-X1-27	—	—	—
52	SENSORS GROUND	—	W28	—	0.5	SP-0V-1	—	—	—
53	KNOCK 1 SIGNAL	—	W42	—	0.5	OEM-X2-26	—	—	—
55	SERIAL 1 RX	—	—	—	—	—	—	—	—
56	ANA VOLT 2	—	W58	—	0.5	OEM-X2-58	—	—	—
57	ANA TEMP 2	—	W72	—	0.5	OEM-X1-37	—	—	—
6	DIG_IN 1	—	W73	—	0.5	OEM-X1-71	—	—	—
61	GROUND	—	W9	—	0.85	SP-GND-1	—	—	—
63	INJECTOR 1	—	W47	—	0.5	OEM-X2-20	—	—	—
63	INJECTOR 1	—	W51	—	0.5	OEM-X2-18	—	—	—
64	VBAT	—	W4	—	0.85	SP-14V-1	—	—	—
67	Stepper 1 / A1	—	—	—	—	—	—	—	—
68	Stepper 2 / A2	—	—	—	—	—	—	—	—
69	LOW SIDE 5	—	W69	—	0.5	OEM-X2-12	—	—	—
7	DIG_IN 2	—	W74	—	0.5	OEM-X1-72	—	—	—
70	Stepper 3 / B1	—	—	—	—	—	—	—	—
71	Stepper 4 / B2	—	—	—	—	—	—	—	—
72	LOW SIDE RELAY 13	—	W62	—	0.5	OEM-X1-17	—	—	—
73	LOW SIDE 1	—	W64	—	0.5	OEM-X1-52	—	—	—
74	LOW SIDE 3	—	W66	—	0.5	OEM-X1-63	—	—	—
76	5V REF	—	—	—	—	—	—	—	—
79	TACHOMETER	—	W71	—	0.5	OEM-X1-48	—	—	—
80	CRANK VR+	—	W40	—	0.5	OEM-X2-68	—	—	—
81	CRANK VR-	—	—	—	—	—	—	—	—
84	Sensor Ground	—	W29	—	0.5	SP-0V-1	—	—	—
86	ANA TEMP 1	—	W61	—	0.5	OEM-X2-21	—	—	—
89	GROUND	—	W10	—	0.85	SP-GND-1	—	—	—
90	GROUND	—	W11	—	0.85	SP-GND-1	—	—	—

OEM-X1

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	Park/Neutral signal (1786)	—	—	—	—	—	—	—	—
10	HO2S signal, bank 1 sensor 2 (post-cat)	—	—	—	—	—	—	—	—
11	HO2S low reference, bank 1 sensor 2	—	W12	—	0.5	SP-0V-1	—	—	—
12	A/C refrigerant pressure signal	—	—	—	—	—	—	—	—
13	A/C refrigerant pressure sensor low reference (5514)	—	W13	—	0.5	SP-0V-1	—	—	—
16	Fuel level sensor signal, primary (1589)	—	—	—	—	—	—	—	—
17	High speed cooling fan relay	—	W62	—	0.5	ME221-C1-72	—	—	—
18	Accessory wakeup serial data (5985)	—	—	—	—	—	—	—	—
19	Ignition 1 voltage (key hot)	—	W1	—	0.85	SP-14V-1	—	—	—
2	4WD low signal (1694)	—	—	—	—	—	—	—	—
20	Battery positive voltage (batt hot)	—	—	—	—	—	—	—	—
23	APP sensor low reference	—	W14	—	0.5	SP-0V-1	—	—	—
24	Fuel tank pressure signal	—	—	—	—	—	—	—	—
27	High-speed GMLAN serial data bus - (2501)	—	W76	—	0.5	ME221-C1-51	—	—	—
28	High-speed GMLAN serial data bus + (2500)	—	W75	—	0.5	ME221-C1-21	—	—	—
29	Accelerator pedal position (APP) sensor 1 signal	—	W59	—	0.5	ME221-C1-17	—	—	—
3	Axle switch signal (1695)	—	—	—	—	—	—	—	—
30	APP sensor low reference	—	W15	—	0.5	SP-0V-1	—	—	—
31	Fuel tank pressure sensor low reference (6049)	—	W16	—	0.5	SP-0V-1	—	—	—
32	Accelerator pedal position (APP) sensor 2 signal	—	—	—	—	—	—	—	—
33	5V reference (fuel tank pressure)	—	W30	—	0.5	SP-5V1-1	—	—	—
34	5V reference (A/C pressure)	—	W31	—	0.5	SP-5V1-1	—	—	—
36	5V reference (APP sensor)	—	W32	—	0.5	SP-5V1-1	—	—	—
37	Intake air temperature (IAT) signal	—	W72	—	0.5	ME221-C1-57	—	—	—
38	Intake air temperature (IAT) low reference	—	W17	—	0.5	SP-0V-1	—	—	—
41	Mass air flow (MAF) signal	—	W57	—	0.5	ME221-C1-26	—	—	—
47	Ignition 1 voltage (key hot)	—	W2	—	0.85	SP-14V-1	—	—	—
48	Tachometer output	—	W71	—	0.5	ME221-C1-79	—	—	—
49	HO2S low reference, bank 2 sensor 2	—	W18	—	0.5	SP-0V-1	—	—	—
50	Fuel pump relay control (primary)	—	W55	—	0.5	ME221-C1-37	—	—	—
51	Fuel pump relay control (secondary)	—	W63	—	0.5	ME221-C1-43	—	—	—
52	Starter enable relay control	—	W64	—	0.5	ME221-C1-73	—	—	—
56	5V reference (APP sensor)	—	W33	—	0.5	SP-5V1-1	—	—	—
57	VSS output to ABS (128k)	—	—	—	—	—	—	—	—
58	Low speed cooling fan relay	—	W65	—	0.5	ME221-C1-12	—	—	—
59	Powertrain relay coil control (main relay)	—	W56	—	0.5	ME221-C1-42	—	—	—
61	EVAP canister vent solenoid	—	—	—	—	—	—	—	—
63	A/C compressor clutch relay	—	W66	—	0.5	ME221-C1-74	—	—	—
64	HO2S heater low control, bank 2 sensor 2	—	W67	—	0.5	ME221-C1-16	—	—	—
65	HO2S heater low control, bank 1 sensor 2	—	W68	—	0.5	ME221-C1-44	—	—	—
68	Malfunction indicator lamp (MIL)	—	—	—	—	—	—	—	—
69	HO2S signal, bank 2 sensor 2 (post-cat)	—	—	—	—	—	—	—	—
70	Secondary fuel level sensor signal (1937)	—	—	—	—	—	—	—	—
71	VSS high signal (manual trans)	—	W73	—	0.5	ME221-C1-6	—	—	—
72	VSS low signal (manual trans)	—	W74	—	0.5	ME221-C1-7	—	—	—
73	Power ground	—	W5	—	0.85	SP-GND-1	—	—	—
9	Brake switch signal	—	—	—	—	—	—	—	—

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	—	W69	—	0.5	ME221-C1-69	—	—	—
13	HO2S heater low control, bank 2 sensor 1	—	W70	—	0.5	ME221-C1-39	—	—	—
14	Cylinder shutoff solenoid 2 (AFM)	—	—	—	—	—	—	—	—
16	Camshaft actuator solenoid (VVT)	—	—	—	—	—	—	—	—
17	Injector 8	—	W54	—	0.5	ME221-C1-3	—	—	—
18	Injector 5	—	W51	—	0.5	ME221-C1-63	—	—	—
19	Injector 6	—	W52	—	0.5	ME221-C1-4	—	—	—
2	5V reference (crankshaft sensor)	—	W34	—	0.5	SP-5V1-1	—	—	—
20	Injector 1	—	W47	—	0.5	ME221-C1-63	—	—	—
21	Engine coolant temperature (ECT) signal	—	W61	—	0.5	ME221-C1-86	—	—	—
22	ECT low reference	—	W19	—	0.5	SP-0V-1	—	—	—
26	Knock sensor 1 signal A	—	W42	—	0.5	ME221-C1-53	—	—	—
27	Knock sensor 1 signal B	—	—	—	—	—	—	—	—
29	Knock sensor 2 signal A	—	—	—	—	—	—	—	—
3	5V reference (throttle body)	—	W35	—	0.5	SP-5V1-1	—	—	—
30	Knock sensor 2 signal B	—	—	—	—	—	—	—	—
32	Generator field duty control	—	—	—	—	—	—	—	—
33	Oil level switch signal	—	—	—	—	—	—	—	—
34	Oil pressure low reference	—	W20	—	0.5	SP-0V-1	—	—	—
35	Throttle body low reference	—	W21	—	0.5	SP-0V-1	—	—	—
37	Injector 2	—	W48	—	0.5	ME221-C1-4	—	—	—
38	Injector 3	—	W49	—	0.5	ME221-C1-33	—	—	—
39	Injector 4	—	W50	—	0.5	ME221-C1-3	—	—	—
40	Injector 7	—	W53	—	0.5	ME221-C1-33	—	—	—
41	5V reference (oil pressure)	—	W36	—	0.5	SP-5V1-1	—	—	—
43	5V reference (MAP)	—	W37	—	0.5	SP-5V1-1	—	—	—
44	5V reference (camshaft sensor)	—	W38	—	0.5	SP-5V1-1	—	—	—
5	Throttle actuator motor control 2	—	—	—	—	—	—	—	—
50	Engine oil pressure signal	—	—	—	—	—	—	—	—
52	Camshaft actuator low reference	—	W22	—	0.5	SP-0V-1	—	—	—
53	MAP low reference	—	W23	—	0.5	SP-0V-1	—	—	—
56	HO2S low reference, bank 1 sensor 1	—	W24	—	0.5	SP-0V-1	—	—	—
57	HO2S signal, bank 1 sensor 1 (pre-cat)	—	—	—	—	—	—	—	—
58	Manifold absolute pressure (MAP) signal	—	W58	—	0.5	ME221-C1-56	—	—	—
59	HO2S signal, bank 2 sensor 1 (pre-cat)	—	—	—	—	—	—	—	—
6	Throttle actuator motor control 1	—	—	—	—	—	—	—	—
60	HO2S low reference, bank 2 sensor 1	—	W25	—	0.5	SP-0V-1	—	—	—
61	Charge indicator signal	—	—	—	—	—	—	—	—
63	Throttle position sensor 2 signal	—	—	—	—	—	—	—	—
64	Camshaft position signal (4x)	—	W41	—	0.5	ME221-C1-22	—	—	—
65	Throttle position sensor 1 signal	—	W60	—	0.5	ME221-C1-18	—	—	—
66	Camshaft position low reference	—	W26	—	0.5	SP-0V-1	—	—	—
68	Crankshaft position signal (58x)	—	W40	—	0.5	ME221-C1-80	—	—	—
69	Crankshaft position low reference	—	W27	—	0.5	SP-0V-1	—	—	—
70	Ignition coil 1 control	—	W43	—	0.5	ME221-C1-32	—	—	—
71	Ignition coil 8 control	—	—	—	—	—	—	—	—
72	Ignition coil 7 control	—	—	—	—	—	—	—	—
73	Ignition coil 2 control	—	W44	—	0.5	ME221-C1-31	—	—	—
74	Ignition coil 6 control	—	—	—	—	—	—	—	—
75	Ignition coil 5 control	—	—	—	—	—	—	—	—
76	Ignition coil 4 control	—	W46	—	0.5	ME221-C1-1	—	—	—
77	Ignition coil 3 control	—	W45	—	0.5	ME221-C1-2	—	—	—
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	—	—	W12	—	0.5	OEM-X1-11	—	—	—
1	—	—	W13	—	0.5	OEM-X1-13	—	—	—
1	—	—	W14	—	0.5	OEM-X1-23	—	—	—
1	—	—	W15	—	0.5	OEM-X1-30	—	—	—
1	—	—	W16	—	0.5	OEM-X1-31	—	—	—
1	—	—	W17	—	0.5	OEM-X1-38	—	—	—
1	—	—	W18	—	0.5	OEM-X1-49	—	—	—
1	—	—	W19	—	0.5	OEM-X2-22	—	—	—
1	—	—	W20	—	0.5	OEM-X2-34	—	—	—
1	—	—	W21	—	0.5	OEM-X2-35	—	—	—
1	—	—	W22	—	0.5	OEM-X2-52	—	—	—
1	—	—	W23	—	0.5	OEM-X2-53	—	—	—
1	—	—	W24	—	0.5	OEM-X2-56	—	—	—
1	—	—	W25	—	0.5	OEM-X2-60	—	—	—
1	—	—	W26	—	0.5	OEM-X2-66	—	—	—
1	—	—	W27	—	0.5	OEM-X2-69	—	—	—
1	—	—	W28	—	0.5	ME221-C1-52	—	—	—
1	—	—	W29	—	0.5	ME221-C1-84	—	—	—

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	ME221-C1-15	—	—	—
1	—	—	W4	—	0.85	ME221-C1-64	—	—	—

SP-5V1

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W30	—	0.5	OEM-X1-33	—	—	—
1	—	—	W31	—	0.5	OEM-X1-34	—	—	—
1	—	—	W32	—	0.5	OEM-X1-36	—	—	—
1	—	—	W33	—	0.5	OEM-X1-56	—	—	—
1	—	—	W34	—	0.5	OEM-X2-2	—	—	—
1	—	—	W35	—	0.5	OEM-X2-3	—	—	—
1	—	—	W36	—	0.5	OEM-X2-41	—	—	—
1	—	—	W37	—	0.5	OEM-X2-43	—	—	—
1	—	—	W38	—	0.5	OEM-X2-44	—	—	—
1	—	—	W39	—	0.5	ME221-C1-45	—	—	—

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	ME221-C1-10	—	—	—
1	—	—	W9	—	0.85	ME221-C1-61	—	—	—
1	—	—	W10	—	0.85	ME221-C1-89	—	—	—
1	—	—	W11	—	0.85	ME221-C1-90	—	—	—

Pin map

OEM point	OEM function	OEM family	Target point	Target function	Target family	Evidence
OEM-X1-1	Park/Neutral signal (1786)	digital_in	—	—	—	single_source
OEM-X1-10	HO2S signal, bank 1 sensor 2 (post-cat)	lambda_nb_in	—	—	—	single_source
OEM-X1-11	HO2S low reference, bank 1 sensor 2	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-12	A/C refrigerant pressure signal	analog_in	—	—	—	corroborated
OEM-X1-13	A/C refrigerant pressure sensor low reference (5514)	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-16	Fuel level sensor signal, primary (1589)	analog_in	—	—	—	single_source
OEM-X1-17	High speed cooling fan relay	low_side_out	ME221-C1-72	LOW SIDE RELAY 13	low_side_out	corroborated
OEM-X1-18	Accessory wakeup serial data (5985)	serial	—	—	—	single_source
OEM-X1-19	Ignition 1 voltage (key hot)	power_in	ME221-C1-15 + ME221-C1-64	IGN +12V + VBAT	power_in	single_source
OEM-X1-2	4WD low signal (1694)	digital_in	—	—	—	single_source
OEM-X1-20	Battery positive voltage (batt hot)	power_in	—	—	—	single_source
OEM-X1-23	APP sensor low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-24	Fuel tank pressure signal	analog_in	—	—	—	corroborated
OEM-X1-27	High-speed GMLAN serial data bus - (2501)	can_l	ME221-C1-51	CAN 1 LOW	can_l	single_source
OEM-X1-28	High-speed GMLAN serial data bus + (2500)	can_h	ME221-C1-21	CAN 1 HIGH	can_h	single_source
OEM-X1-29	Accelerator pedal position (APP) sensor 1 signal	analog_in	ME221-C1-17	ANA VOLT 3	analog_in	single_source
OEM-X1-3	Axle switch signal (1695)	digital_in	—	—	—	single_source
OEM-X1-30	APP sensor low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-31	Fuel tank pressure sensor low reference (6049)	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-32	Accelerator pedal position (APP) sensor 2 signal	analog_in	—	—	—	single_source
OEM-X1-33	5V reference (fuel tank pressure)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X1-34	5V reference (A/C pressure)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X1-36	5V reference (APP sensor)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X1-37	Intake air temperature (IAT) signal	temp_in	ME221-C1-57	ANA TEMP 2	temp_in	corroborated
OEM-X1-38	Intake air temperature (IAT) low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-41	Mass air flow (MAF) signal	analog_in	ME221-C1-26	ANA VOLT 1	analog_in	corroborated
OEM-X1-47	Ignition 1 voltage (key hot)	power_in	ME221-C1-15 + ME221-C1-64	IGN +12V + VBAT	power_in	single_source
OEM-X1-48	Tachometer output	tacho_out	ME221-C1-79	TACHOMETER	tacho_out	corroborated
OEM-X1-49	HO2S low reference, bank 2 sensor 2	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X1-50	Fuel pump relay control (primary)	low_side_out	ME221-C1-37	LOW SIDE RELAY 11	low_side_out	corroborated
OEM-X1-51	Fuel pump relay control (secondary)	low_side_out	ME221-C1-43	LOW SIDE RELAY 14	low_side_out	corroborated
OEM-X1-52	Starter enable relay control	low_side_out	ME221-C1-73	LOW SIDE 1	low_side_out	corroborated
OEM-X1-56	5V reference (APP sensor)	vref	ME221-C1-45	5V REF	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	ME221-C1-12	LOW SIDE 2	low_side_out	corroborated
OEM-X1-59	Powertrain relay coil control (main relay)	low_side_out	ME221-C1-42	LOW SIDE RELAY 12	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	ME221-C1-74	LOW SIDE 3	low_side_out	corroborated
OEM-X1-64	HO2S heater low control, bank 2 sensor 2	low_side_out	ME221-C1-16	LSU HEATER -VE	low_side_out	single_source
OEM-X1-65	HO2S heater low control, bank 1 sensor 2	low_side_out	ME221-C1-44	LOW SIDE 4	low_side_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	—	—	—	single_source
OEM-X1-70	Secondary fuel level sensor signal (1937)	analog_in	—	—	—	single_source
OEM-X1-71	VSS high signal (manual trans)	digital_in	ME221-C1-6	DIG_IN 1	digital_in	corroborated
OEM-X1-72	VSS low signal (manual trans)	digital_in	ME221-C1-7	DIG_IN 2	digital_in	corroborated
OEM-X1-73	Power ground	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-X1-9	Brake switch signal	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	ME221-C1-69	LOW SIDE 5	low_side_out	single_source
OEM-X2-13	HO2S heater low control, bank 2 sensor 1	low_side_out	ME221-C1-39	LOW SIDE 6	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	ME221-C1-3	INJECTOR 4	injector_out	single_source
OEM-X2-18	Injector 5	injector_out	ME221-C1-63	INJECTOR 1	injector_out	single_source
OEM-X2-19	Injector 6	injector_out	ME221-C1-4	INJECTOR 2	injector_out	single_source
OEM-X2-2	5V reference (crankshaft sensor)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X2-20	Injector 1	injector_out	ME221-C1-63	INJECTOR 1	injector_out	single_source
OEM-X2-21	Engine coolant temperature (ECT) signal	temp_in	ME221-C1-86	ANA TEMP 1	temp_in	corroborated
OEM-X2-22	ECT low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-26	Knock sensor 1 signal A	knock_in	ME221-C1-53	KNOCK 1 SIGNAL	knock_in	corroborated
OEM-X2-27	Knock sensor 1 signal B	knock_in	—	—	—	single_source
OEM-X2-29	Knock sensor 2 signal A	knock_in	—	—	—	corroborated
OEM-X2-3	5V reference (throttle body)	vref	ME221-C1-45	5V REF	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	—	—	—	corroborated
OEM-X2-34	Oil pressure low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-35	Throttle body low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-37	Injector 2	injector_out	ME221-C1-4	INJECTOR 2	injector_out	single_source
OEM-X2-38	Injector 3	injector_out	ME221-C1-33	INJECTOR 3	injector_out	single_source
OEM-X2-39	Injector 4	injector_out	ME221-C1-3	INJECTOR 4	injector_out	single_source
OEM-X2-40	Injector 7	injector_out	ME221-C1-33	INJECTOR 3	injector_out	single_source
OEM-X2-41	5V reference (oil pressure)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X2-43	5V reference (MAP)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X2-44	5V reference (camshaft sensor)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-X2-5	Throttle actuator motor control 2	hbridge_out	—	—	—	corroborated
OEM-X2-50	Engine oil pressure signal	analog_in	—	—	—	corroborated
OEM-X2-52	Camshaft actuator low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-53	MAP low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-56	HO2S low reference, bank 1 sensor 1	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-57	HO2S signal, bank 1 sensor 1 (pre-cat)	lambda_nb_in	—	—	—	single_source
OEM-X2-58	Manifold absolute pressure (MAP) signal	analog_in	ME221-C1-56	ANA VOLT 2	analog_in	corroborated
OEM-X2-59	HO2S signal, bank 2 sensor 1 (pre-cat)	lambda_nb_in	—	—	—	single_source
OEM-X2-6	Throttle actuator motor control 1	hbridge_out	—	—	—	corroborated
OEM-X2-60	HO2S low reference, bank 2 sensor 1	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-61	Charge indicator signal	low_side_out	—	—	—	corroborated
OEM-X2-63	Throttle position sensor 2 signal	analog_in	—	—	—	single_source
OEM-X2-64	Camshaft position signal (4x)	trigger_in	ME221-C1-22	CAM A VR+	trigger_in	single_source
OEM-X2-65	Throttle position sensor 1 signal	analog_in	ME221-C1-18	ANA VOLT 4	analog_in	single_source
OEM-X2-66	Camshaft position low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-68	Crankshaft position signal (58x)	trigger_in	ME221-C1-80	CRANK VR+	trigger_in	single_source
OEM-X2-69	Crankshaft position low reference	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-X2-70	Ignition coil 1 control	ignition_out	ME221-C1-32	COIL 1	ignition_out	single_source
OEM-X2-71	Ignition coil 8 control	ignition_out	—	—	—	single_source
OEM-X2-72	Ignition coil 7 control	ignition_out	—	—	—	single_source
OEM-X2-73	Ignition coil 2 control	ignition_out	ME221-C1-31	COIL 2	ignition_out	single_source
OEM-X2-74	Ignition coil 6 control	ignition_out	—	—	—	single_source
OEM-X2-75	Ignition coil 5 control	ignition_out	—	—	—	single_source
OEM-X2-76	Ignition coil 4 control	ignition_out	ME221-C1-1	COIL 4	ignition_out	single_source
OEM-X2-77	Ignition coil 3 control	ignition_out	ME221-C1-2	COIL 3	ignition_out	single_source
OEM-X2-78	Coil low reference (odd bank)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-X2-79	Coil low reference (even bank)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + 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	ME221-C1-15	0.85	no route	IGN +12V	—
W4	SP-14V-1	ME221-C1-64	0.85	no route	VBAT	—
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	ME221-C1-10	0.85	no route	GROUND CHASSIS	—
W9	SP-GND-1	ME221-C1-61	0.85	no route	GROUND	—
W10	SP-GND-1	ME221-C1-89	0.85	no route	GROUND	—
W11	SP-GND-1	ME221-C1-90	0.85	no route	GROUND	—
W12	OEM-X1-11	SP-0V-1	0.5	no route	HO2S low reference, bank 1 sensor 2	—
W13	OEM-X1-13	SP-0V-1	0.5	no route	A/C refrigerant pressure sensor low reference (5514)	—
W14	OEM-X1-23	SP-0V-1	0.5	no route	APP sensor low reference	—
W15	OEM-X1-30	SP-0V-1	0.5	no route	APP sensor low reference	—
W16	OEM-X1-31	SP-0V-1	0.5	no route	Fuel tank pressure sensor low reference (6049)	—
W17	OEM-X1-38	SP-0V-1	0.5	no route	Intake air temperature (IAT) low reference	—
W18	OEM-X1-49	SP-0V-1	0.5	no route	HO2S low reference, bank 2 sensor 2	—
W19	OEM-X2-22	SP-0V-1	0.5	no route	ECT low reference	—
W20	OEM-X2-34	SP-0V-1	0.5	no route	Oil pressure low reference	—
W21	OEM-X2-35	SP-0V-1	0.5	no route	Throttle body low reference	—
W22	OEM-X2-52	SP-0V-1	0.5	no route	Camshaft actuator low reference	—
W23	OEM-X2-53	SP-0V-1	0.5	no route	MAP low reference	—
W24	OEM-X2-56	SP-0V-1	0.5	no route	HO2S low reference, bank 1 sensor 1	—
W25	OEM-X2-60	SP-0V-1	0.5	no route	HO2S low reference, bank 2 sensor 1	—
W26	OEM-X2-66	SP-0V-1	0.5	no route	Camshaft position low reference	—
W27	OEM-X2-69	SP-0V-1	0.5	no route	Crankshaft position low reference	—
W28	SP-0V-1	ME221-C1-52	0.5	no route	SENSORS GROUND	—
W29	SP-0V-1	ME221-C1-84	0.5	no route	Sensor Ground	—
W30	OEM-X1-33	SP-5V1-1	0.5	no route	5V reference (fuel tank pressure)	—
W31	OEM-X1-34	SP-5V1-1	0.5	no route	5V reference (A/C pressure)	—
W32	OEM-X1-36	SP-5V1-1	0.5	no route	5V reference (APP sensor)	—
W33	OEM-X1-56	SP-5V1-1	0.5	no route	5V reference (APP sensor)	—
W34	OEM-X2-2	SP-5V1-1	0.5	no route	5V reference (crankshaft sensor)	—
W35	OEM-X2-3	SP-5V1-1	0.5	no route	5V reference (throttle body)	—
W36	OEM-X2-41	SP-5V1-1	0.5	no route	5V reference (oil pressure)	—
W37	OEM-X2-43	SP-5V1-1	0.5	no route	5V reference (MAP)	—
W38	OEM-X2-44	SP-5V1-1	0.5	no route	5V reference (camshaft sensor)	—
W39	SP-5V1-1	ME221-C1-45	0.5	no route	5V REF	—
W40	OEM-X2-68	ME221-C1-80	0.5	no route	Crankshaft position signal (58x)	—
W41	OEM-X2-64	ME221-C1-22	0.5	no route	Camshaft position signal (4x)	—
W42	OEM-X2-26	ME221-C1-53	0.5	no route	Knock sensor 1 signal A	—
W43	OEM-X2-70	ME221-C1-32	0.5	no route	Ignition coil 1 control	—
W44	OEM-X2-73	ME221-C1-31	0.5	no route	Ignition coil 2 control	—
W45	OEM-X2-77	ME221-C1-2	0.5	no route	Ignition coil 3 control	—
W46	OEM-X2-76	ME221-C1-1	0.5	no route	Ignition coil 4 control	—
W47	OEM-X2-20	ME221-C1-63	0.5	no route	Injector 1	—
W48	OEM-X2-37	ME221-C1-4	0.5	no route	Injector 2	—
W49	OEM-X2-38	ME221-C1-33	0.5	no route	Injector 3	—
W50	OEM-X2-39	ME221-C1-3	0.5	no route	Injector 4	—
W51	OEM-X2-18	ME221-C1-63	0.5	no route	Injector 5	—
W52	OEM-X2-19	ME221-C1-4	0.5	no route	Injector 6	—
W53	OEM-X2-40	ME221-C1-33	0.5	no route	Injector 7	—
W54	OEM-X2-17	ME221-C1-3	0.5	no route	Injector 8	—
W55	OEM-X1-50	ME221-C1-37	0.5	no route	Fuel pump relay control (primary)	—
W56	OEM-X1-59	ME221-C1-42	0.5	no route	Powertrain relay coil control (main relay)	—
W57	OEM-X1-41	ME221-C1-26	0.5	no route	Mass air flow (MAF) signal	—
W58	OEM-X2-58	ME221-C1-56	0.5	no route	Manifold absolute pressure (MAP) signal	—
W59	OEM-X1-29	ME221-C1-17	0.5	no route	Accelerator pedal position (APP) sensor 1 signal	—
W60	OEM-X2-65	ME221-C1-18	0.5	no route	Throttle position sensor 1 signal	—
W61	OEM-X2-21	ME221-C1-86	0.5	no route	Engine coolant temperature (ECT) signal	—
W62	OEM-X1-17	ME221-C1-72	0.5	no route	High speed cooling fan relay	—
W63	OEM-X1-51	ME221-C1-43	0.5	no route	Fuel pump relay control (secondary)	—
W64	OEM-X1-52	ME221-C1-73	0.5	no route	Starter enable relay control	—
W65	OEM-X1-58	ME221-C1-12	0.5	no route	Low speed cooling fan relay	—
W66	OEM-X1-63	ME221-C1-74	0.5	no route	A/C compressor clutch relay	—
W67	OEM-X1-64	ME221-C1-16	0.5	no route	HO2S heater low control, bank 2 sensor 2	—
W68	OEM-X1-65	ME221-C1-44	0.5	no route	HO2S heater low control, bank 1 sensor 2	—
W69	OEM-X2-12	ME221-C1-69	0.5	no route	HO2S heater low control, bank 1 sensor 1	—
W70	OEM-X2-13	ME221-C1-39	0.5	no route	HO2S heater low control, bank 2 sensor 1	—
W71	OEM-X1-48	ME221-C1-79	0.5	no route	Tachometer output	—
W72	OEM-X1-37	ME221-C1-57	0.5	no route	Intake air temperature (IAT) signal	—
W73	OEM-X1-71	ME221-C1-6	0.5	no route	VSS high signal (manual trans)	—
W74	OEM-X1-72	ME221-C1-7	0.5	no route	VSS low signal (manual trans)	—
W75	OEM-X1-28	ME221-C1-21	0.5	no route	High-speed GMLAN serial data bus + (2500)	—
W76	OEM-X1-27	ME221-C1-51	0.5	no route	High-speed GMLAN serial data bus - (2501)	—

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 (13)

Severity	Code	Subject	Message
error	NET_MERGED	ME221-C1-3 + OEM-X2-17 + OEM-X2-39	2 different OEM functions share one net: OEM-X2-17 Injector 8; OEM-X2-39 Injector 4
error	NET_MERGED	ME221-C1-33 + OEM-X2-38 + OEM-X2-40	2 different OEM functions share one net: OEM-X2-38 Injector 3; OEM-X2-40 Injector 7
error	NET_MERGED	ME221-C1-4 + OEM-X2-19 + OEM-X2-37	2 different OEM functions share one net: OEM-X2-19 Injector 6; OEM-X2-37 Injector 2
error	NET_MERGED	ME221-C1-63 + OEM-X2-18 + OEM-X2-20	2 different OEM functions share one net: OEM-X2-18 Injector 5; OEM-X2-20 Injector 1
error	REQUIRED_UNMAPPED	OEM-X1-32	Required OEM function "Accelerator pedal position (APP) sensor 2 signal" (analog_in) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-5	Required OEM function "Throttle actuator motor control 2" (hbridge_out) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-6	Required OEM function "Throttle actuator motor control 1" (hbridge_out) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-63	Required OEM function "Throttle position sensor 2 signal" (analog_in) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-71	Required OEM function "Ignition coil 8 control" (ignition_out) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-72	Required OEM function "Ignition coil 7 control" (ignition_out) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-74	Required OEM function "Ignition coil 6 control" (ignition_out) is not connected to the new ECU.
error	REQUIRED_UNMAPPED	OEM-X2-75	Required OEM function "Ignition coil 5 control" (ignition_out) is not connected to the new ECU.
info	UNMAPPED	OEM	29 optional OEM pins are not mapped: OEM-X1-1 Park/Neutral signal (1786); OEM-X1-10 HO2S signal, bank 1 sensor 2 (post-cat); OEM-X1-12 A/C refrigerant pressure signal; OEM-X1-16 Fuel level sensor signal, primary (1589); OEM-X1-18 Accessory wakeup serial data (5985); OEM-X1-2 4WD low signal (1694); OEM-X1-24 Fuel tank pressure signal; OEM-X1-3 Axle switch signal (1695); OEM-X1-57 VSS output to ABS (128k); OEM-X1-61 EVAP canister vent solenoid; OEM-X1-68 Malfunction indicator lamp (MIL); OEM-X1-69 HO2S signal, bank 2 sensor 2 (post-cat); OEM-X1-70 Secondary fuel level sensor signal (1937); OEM-X1-9 Brake switch signal; OEM-X2-10 Cylinder shutoff solenoid 1 (AFM); OEM-X2-11 Cylinder shutoff solenoid 4 (AFM); OEM-X2-14 Cylinder shutoff solenoid 2 (AFM); OEM-X2-16 Camshaft actuator solenoid (VVT); OEM-X2-27 Knock sensor 1 signal B; OEM-X2-29 Knock sensor 2 signal A; OEM-X2-30 Knock sensor 2 signal B; OEM-X2-32 Generator field duty control; OEM-X2-33 Oil level switch signal; OEM-X2-50 Engine oil pressure signal; OEM-X2-57 HO2S signal, bank 1 sensor 1 (pre-cat); OEM-X2-59 HO2S signal, bank 2 sensor 1 (pre-cat); 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

Fit check: needs add-on. Resolve these before building: - No drive-by-wire; needs a cable-throttle conversion or an external DBW controller - Needs CAN (GM E38 (C6 Corvette)); not documented for this ECU - Only 4 ignition outputs for 8 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 8 injectors: batch / semi-sequential injection Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-X2 75: Ignition coil 5 control: no free ignition output on Motorsport Electronics ME221 - OEM-X2 74: Ignition coil 6 control: no free ignition output on Motorsport Electronics ME221 - OEM-X2 72: Ignition coil 7 control: no free ignition output on Motorsport Electronics ME221 - OEM-X2 71: Ignition coil 8 control: no free ignition output on Motorsport Electronics ME221 - OEM-X1 32: Accelerator pedal position (APP) sensor 2 signal: no free tps/analog_0_5 on Motorsport Electronics ME221 - OEM-X2 63: Throttle position sensor 2 signal: no free tps/analog_0_5 on Motorsport Electronics ME221 - OEM-X2 6: Throttle actuator motor control 1: no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-X2 5: Throttle actuator motor control 2: no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-X1 20: Battery positive voltage (batt hot): Motorsport Electronics ME221 has no battery-constant input; not needed - OEM-X2 27: Knock sensor 1 signal B: no free knock input on Motorsport Electronics ME221 - OEM-X2 29: Knock sensor 2 signal A: no free knock input on Motorsport Electronics ME221 - OEM-X2 30: Knock sensor 2 signal B: no free knock input on Motorsport Electronics ME221 - OEM-X2 10: Cylinder shutoff solenoid 1 (AFM): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 14: Cylinder shutoff solenoid 2 (AFM): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 9: Cylinder shutoff solenoid 3 (AFM): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 11: Cylinder shutoff solenoid 4 (AFM): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X1 61: EVAP canister vent solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X1 68: Malfunction indicator lamp (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 16: Camshaft actuator solenoid (VVT): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 32: Generator field duty control: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 61: Charge indicator signal: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X2 8: EVAP canister purge solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-X1 57: VSS output to ABS (128k): no free frequency_out/tacho/low_side/ls_hs on Motorsport Electronics ME221 - OEM-X1 10: HO2S signal, bank 1 sensor 2 (post-cat): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-X1 69: HO2S signal, bank 2 sensor 2 (post-cat): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-X2 57: HO2S signal, bank 1 sensor 1 (pre-cat): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-X2 59: HO2S signal, bank 2 sensor 1 (pre-cat): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-X1 12: A/C refrigerant pressure signal: no free analog_0_5 on Motorsport Electronics ME221 - OEM-X1 16: Fuel level sensor signal, primary (1589): no free analog_0_5 on Motorsport Electronics ME221 - OEM-X1 24: Fuel tank pressure signal: no free analog_0_5 on Motorsport Electronics ME221 - OEM-X1 70: Secondary fuel level sensor signal (1937): no free analog_0_5 on Motorsport Electronics ME221 - OEM-X2 50: Engine oil pressure signal: no free analog_0_5 on Motorsport Electronics ME221 - OEM-X1 2: 4WD low signal (1694): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-X1 1: Park/Neutral signal (1786): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-X1 3: Axle switch signal (1695): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-X1 9: Brake switch signal: no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-X2 33: Oil level switch signal: no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-X1 18: Accessory wakeup serial data (5985): no free k_line on Motorsport Electronics ME221

Sources

Reliability	Kind	Title	URL	Archive	Captured	SHA-256
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	—	—	—
4	vendor_doc	Motorsport Electronics GEN2 ME221/ME360/ME442 wire-in pinout	https://motorsport-electronics.co.uk/onlinehelp/html/ME442ME360ME221GEN2Wire-InPinout.html	—	—	—
2	community_copy	lt1swap.com: E38 ECM Connector Pinouts	https://lt1swap.com/E38 ECM Connector Pinouts.htm	—	—	—