RSX Type-S 2005-06 (K20Z1) → Motorsport Electronics ME221 (auto)

RSX Type-S 2005-06 (K20Z1) — Motorsport Electronics — ME221

Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-09

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	proposal · not yet verified: nobody has reported building and running this harness
Open errors	none
Size of the job	55 wires · 7 connectors · 4 part lines
Tools	715131-1 · wire strippers · multimeter · heat gun + heat-shrink
Terminals	316836-1
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-A-2	SP-14V-1	0.85	☐	☐	☐	☐	☐	☐	☐
W2	OEM-A-3	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-A-4	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W6	OEM-A-5	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W7	OEM-A-8	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W8	OEM-A-9	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W9	OEM-E-4	SP-GND-1	0.85	☐	☐	☐	☐	☐	☐	☐
W10	SP-GND-1	ME221-C1-10	0.85	☐	☐	☐	☐	☐	☐	☐
W11	SP-GND-1	ME221-C1-61	0.85	☐	☐	☐	☐	☐	☐	☐
W12	SP-GND-1	ME221-C1-89	0.85	☐	☐	☐	☐	☐	☐	☐
W13	SP-GND-1	ME221-C1-90	0.85	☐	☐	☐	☐	☐	☐	☐
W14	OEM-A-23	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W15	OEM-A-24	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W16	OEM-E-5	SP-0V-1	0.5	☐	☐	☐	☐	☐	☐	☐
W17	SP-0V-1	ME221-C1-52	0.5	☐	☐	☐	☐	☐	☐	☐
W18	SP-0V-1	ME221-C1-84	0.5	☐	☐	☐	☐	☐	☐	☐
W19	OEM-A-20	ME221-C1-45	0.5	☐	☐	☐	☐	☐	☐	☐
W20	OEM-A-21	ME221-C1-46	0.5	☐	☐	☐	☐	☐	☐	☐
W21	OEM-E-6	ME221-C1-76	0.5	☐	☐	☐	☐	☐	☐	☐
W22	OEM-A-7	ME221-C1-81	0.5	☐	☐	☐	☐	☐	☐	☐
W23	OEM-A-19	ME221-C1-22	0.5	☐	☐	☐	☐	☐	☐	☐
W24	OEM-A-6	ME221-C1-23	0.5	☐	☐	☐	☐	☐	☐	☐
W25	OEM-A-1	ME221-C1-53	0.5	☐	☐	☐	☐	☐	☐	☐
W26	OEM-A-16	ME221-C1-32	0.5	☐	☐	☐	☐	☐	☐	☐
W27	OEM-A-15	ME221-C1-31	0.5	☐	☐	☐	☐	☐	☐	☐
W28	OEM-A-14	ME221-C1-2	0.5	☐	☐	☐	☐	☐	☐	☐
W29	OEM-A-13	ME221-C1-1	0.5	☐	☐	☐	☐	☐	☐	☐
W30	OEM-B-5	ME221-C1-63	0.5	☐	☐	☐	☐	☐	☐	☐
W31	OEM-B-4	ME221-C1-4	0.5	☐	☐	☐	☐	☐	☐	☐
W32	OEM-B-3	ME221-C1-33	0.5	☐	☐	☐	☐	☐	☐	☐
W33	OEM-B-2	ME221-C1-3	0.5	☐	☐	☐	☐	☐	☐	☐
W34	OEM-E-8	ME221-C1-73	0.5	☐	☐	☐	☐	☐	☐	☐
W35	OEM-E-12	ME221-C1-12	0.5	☐	☐	☐	☐	☐	☐	☐
W36	OEM-E-17	ME221-C1-74	0.5	☐	☐	☐	☐	☐	☐	☐
W37	OEM-E-18	ME221-C1-44	0.5	☐	☐	☐	☐	☐	☐	☐
W38	OEM-E-9	ME221-C1-69	0.5	☐	☐	☐	☐	☐	☐	☐
W39	OEM-E-21	ME221-C1-16	0.5	☐	☐	☐	☐	☐	☐	☐
W40	OEM-A-10	ME221-C1-39	0.5	☐	☐	☐	☐	☐	☐	☐
W41	OEM-B-1	ME221-C1-67	0.5	☐	☐	☐	☐	☐	☐	☐
W42	OEM-B-18	ME221-C1-68	0.5	☐	☐	☐	☐	☐	☐	☐
W43	OEM-B-21	ME221-C1-70	0.5	☐	☐	☐	☐	☐	☐	☐
W44	OEM-E-19	ME221-C1-71	0.5	☐	☐	☐	☐	☐	☐	☐
W45	OEM-E-25	ME221-C1-79	0.5	☐	☐	☐	☐	☐	☐	☐
W46	OEM-A-31	ME221-C1-50	0.5	☐	☐	☐	☐	☐	☐	☐
W47	OEM-A-28	ME221-C1-19	0.5	☐	☐	☐	☐	☐	☐	☐
W48	OEM-A-30	ME221-C1-26	0.5	☐	☐	☐	☐	☐	☐	☐
W49	OEM-A-29	ME221-C1-56	0.5	☐	☐	☐	☐	☐	☐	☐
W50	OEM-E-20	ME221-C1-17	0.5	☐	☐	☐	☐	☐	☐	☐
W51	OEM-B-8	ME221-C1-86	0.5	☐	☐	☐	☐	☐	☐	☐
W52	OEM-B-17	ME221-C1-57	0.5	☐	☐	☐	☐	☐	☐	☐
W53	OEM-B-13	ME221-C1-18	0.5	☐	☐	☐	☐	☐	☐	☐
W54	OEM-A-18	ME221-C1-6	0.5	☐	☐	☐	☐	☐	☐	☐
W55	OEM-B-10	ME221-C1-7	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-C1-15	ME221-C1-52	open (OL)	+12 V supply must not touch sensor ground
3	ME221-C1-45	ME221-C1-52	open (OL)	5 V sensor reference must not touch sensor ground
4	ME221-C1-46	ME221-C1-52	open (OL)	5 V sensor reference must not touch sensor ground
5	ME221-C1-10	ME221-C1-45	open (OL)	power ground must not touch 5 V sensor reference
6	ME221-C1-10	ME221-C1-46	open (OL)	power ground must not touch 5 V sensor reference
7	ME221-C1-10	ME221-C1-76	open (OL)	power ground must not touch 5 V sensor reference
8	ME221-C1-15	ME221-C1-45	open (OL)	+12 V supply must not touch 5 V sensor reference
9	ME221-C1-15	ME221-C1-46	open (OL)	+12 V supply must not touch 5 V sensor reference
10	ME221-C1-15	ME221-C1-76	open (OL)	+12 V supply must not touch 5 V sensor reference
11	ME221-C1-52	ME221-C1-76	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	—	W29	—	0.5	OEM-A-13	—	—	—
10	GROUND CHASSIS	—	W10	—	0.85	SP-GND-1	—	—	—
12	LOW SIDE 2	—	W35	—	0.5	OEM-E-12	—	—	—
14	LSU +12V	—	—	—	—	—	—	—	—
15	IGN +12V	—	W3	—	0.85	SP-14V-1	—	—	—
16	LSU HEATER -VE	—	W39	—	0.5	OEM-E-21	—	—	—
17	ANA VOLT 3	—	W50	—	0.5	OEM-E-20	—	—	—
18	ANA VOLT 4	—	W53	—	0.5	OEM-B-13	—	—	—
19	LSU UN	—	W47	—	0.5	OEM-A-28	—	—	—
2	COIL 3	—	W28	—	0.5	OEM-A-14	—	—	—
20	LSU VM	—	—	—	—	—	—	—	—
21	CAN 1 HIGH	—	—	—	—	—	—	—	—
22	CAM A VR+	—	W23	—	0.5	OEM-A-19	—	—	—
23	CAM A VR-	—	W24	—	0.5	OEM-A-6	—	—	—
24	SERIAL 1 GROUND	—	—	—	—	—	—	—	—
25	SERIAL 1 TX	—	—	—	—	—	—	—	—
26	ANA VOLT 1	—	W48	—	0.5	OEM-A-30	—	—	—
3	INJECTOR 4	—	W33	—	0.5	OEM-B-2	—	—	—
31	COIL 2	—	W27	—	0.5	OEM-A-15	—	—	—
32	COIL 1	—	W26	—	0.5	OEM-A-16	—	—	—
33	INJECTOR 3	—	W32	—	0.5	OEM-B-3	—	—	—
35	USB D+	—	—	—	—	—	—	—	—
36	USB D-	—	—	—	—	—	—	—	—
37	LOW SIDE RELAY 11	—	—	—	—	—	—	—	—
38	USB VBUS	—	—	—	—	—	—	—	—
39	LOW SIDE 6	—	W40	—	0.5	OEM-A-10	—	—	—
4	INJECTOR 2	—	W31	—	0.5	OEM-B-4	—	—	—
41	USB GROUND	—	—	—	—	—	—	—	—
42	LOW SIDE RELAY 12	—	—	—	—	—	—	—	—
43	LOW SIDE RELAY 14	—	—	—	—	—	—	—	—
44	LOW SIDE 4	—	W37	—	0.5	OEM-E-18	—	—	—
45	5V REF	—	W19	—	0.5	OEM-A-20	—	—	—
46	5V REF	—	W20	—	0.5	OEM-A-21	—	—	—
49	LSU IA	—	—	—	—	—	—	—	—
50	LSU IP	—	W46	—	0.5	OEM-A-31	—	—	—
51	CAN 1 LOW	—	—	—	—	—	—	—	—
52	SENSORS GROUND	—	W17	—	0.5	SP-0V-1	—	—	—
53	KNOCK 1 SIGNAL	—	W25	—	0.5	OEM-A-1	—	—	—
55	SERIAL 1 RX	—	—	—	—	—	—	—	—
56	ANA VOLT 2	—	W49	—	0.5	OEM-A-29	—	—	—
57	ANA TEMP 2	—	W52	—	0.5	OEM-B-17	—	—	—
6	DIG_IN 1	—	W54	—	0.5	OEM-A-18	—	—	—
61	GROUND	—	W11	—	0.85	SP-GND-1	—	—	—
63	INJECTOR 1	—	W30	—	0.5	OEM-B-5	—	—	—
64	VBAT	—	W4	—	0.85	SP-14V-1	—	—	—
67	Stepper 1 / A1	—	W41	—	0.5	OEM-B-1	—	—	—
68	Stepper 2 / A2	—	W42	—	0.5	OEM-B-18	—	—	—
69	LOW SIDE 5	—	W38	—	0.5	OEM-E-9	—	—	—
7	DIG_IN 2	—	W55	—	0.5	OEM-B-10	—	—	—
70	Stepper 3 / B1	—	W43	—	0.5	OEM-B-21	—	—	—
71	Stepper 4 / B2	—	W44	—	0.5	OEM-E-19	—	—	—
72	LOW SIDE RELAY 13	—	—	—	—	—	—	—	—
73	LOW SIDE 1	—	W34	—	0.5	OEM-E-8	—	—	—
74	LOW SIDE 3	—	W36	—	0.5	OEM-E-17	—	—	—
76	5V REF	—	W21	—	0.5	OEM-E-6	—	—	—
79	TACHOMETER	—	W45	—	0.5	OEM-E-25	—	—	—
80	CRANK VR-	—	—	—	—	—	—	—	—
81	CRANK VR+	—	W22	—	0.5	OEM-A-7	—	—	—
84	Sensor Ground	—	W18	—	0.5	SP-0V-1	—	—	—
86	ANA TEMP 1	—	W51	—	0.5	OEM-B-8	—	—	—
89	GROUND	—	W12	—	0.85	SP-GND-1	—	—	—
90	GROUND	—	W13	—	0.85	SP-GND-1	—	—	—

OEM-A

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	Knock sensor (KS)	—	W25	—	0.5	ME221-C1-53	—	—	—
2	Ignition power 2 (IGP2)	—	W1	—	0.85	SP-14V-1	—	—	—
3	Ignition power 1 (IGP1)	—	W2	—	0.85	SP-14V-1	—	—	—
4	Power ground 2 (PG2)	—	W5	—	0.85	SP-GND-1	—	—	—
5	Power ground 1 (PG1)	—	W6	—	0.85	SP-GND-1	—	—	—
6	Camshaft position B (CMP B)	—	W24	—	0.5	ME221-C1-23	—	—	—
7	Crank position sensor (CKP)	—	W22	—	0.5	ME221-C1-81	—	—	—
8	Logic ground 2 (LG2)	—	W7	—	0.85	SP-GND-1	—	—	—
9	Logic ground 1 (LG1)	—	W8	—	0.85	SP-GND-1	—	—	—
10	A/F sensor heater control (AFSHTC)	—	W40	—	0.5	ME221-C1-39	—	—	—
11	—	—	—	—	—	—	—	—	—
12	Idle air control valve (IACV)	—	—	—	—	—	—	—	—
13	Ignition coil 4 (IGPLS4)	—	W29	—	0.5	ME221-C1-1	—	—	—
14	Ignition coil 3 (IGPLS3)	—	W28	—	0.5	ME221-C1-2	—	—	—
15	Ignition coil 2 (IGPLS2)	—	W27	—	0.5	ME221-C1-31	—	—	—
16	Ignition coil 1 (IGPLS1)	—	W26	—	0.5	ME221-C1-32	—	—	—
17	—	—	—	—	—	—	—	—	—
18	Neutral position switch (NC)	—	W54	—	0.5	ME221-C1-6	—	—	—
19	Camshaft position A (CMP A)	—	W23	—	0.5	ME221-C1-22	—	—	—
20	Sensor 5V supply 2 (VCC2)	—	W19	—	0.5	ME221-C1-45	—	—	—
21	Sensor 5V supply 1 (VCC1)	—	W20	—	0.5	ME221-C1-46	—	—	—
22	—	—	—	—	—	—	—	—	—
23	Sensor ground 2 (SG2)	—	W14	—	0.5	SP-0V-1	—	—	—
24	Sensor ground 1 (SG1)	—	W15	—	0.5	SP-0V-1	—	—	—
25	—	—	—	—	—	—	—	—	—
26	—	—	—	—	—	—	—	—	—
27	—	—	—	—	—	—	—	—	—
28	A/F sensor - (AFS-, wideband Vs)	—	W47	—	0.5	ME221-C1-19	—	—	—
29	Throttle position sensor (TPS)	—	W49	—	0.5	ME221-C1-56	—	—	—
30	Manifold absolute pressure (MAP)	—	W48	—	0.5	ME221-C1-26	—	—	—
31	A/F sensor + (AFS+, wideband Ip)	—	W46	—	0.5	ME221-C1-50	—	—	—

OEM-B

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	VTC oil control solenoid (+)	—	W41	—	0.5	ME221-C1-67	—	—	—
2	Injector 4 (INJ4)	—	W33	—	0.5	ME221-C1-3	—	—	—
3	Injector 3 (INJ3)	—	W32	—	0.5	ME221-C1-33	—	—	—
4	Injector 2 (INJ2)	—	W31	—	0.5	ME221-C1-4	—	—	—
5	Injector 1 (INJ1)	—	W30	—	0.5	ME221-C1-63	—	—	—
6	VTEC solenoid (VTS)	—	—	—	—	—	—	—	—
7	—	—	—	—	—	—	—	—	—
8	Coolant temp sensor (ECT)	—	W51	—	0.5	ME221-C1-86	—	—	—
9	—	—	—	—	—	—	—	—	—
10	Alternator L signal (ALTL)	—	W55	—	0.5	ME221-C1-7	—	—	—
11	VTEC oil pressure switch (VTPSW)	—	—	—	—	—	—	—	—
12	—	—	—	—	—	—	—	—	—
13	Alternator FR signal (ALTF)	—	W53	—	0.5	ME221-C1-18	—	—	—
14	—	—	—	—	—	—	—	—	—
15	—	—	—	—	—	—	—	—	—
16	—	—	—	—	—	—	—	—	—
17	Intake air temp sensor (IAT)	—	W52	—	0.5	ME221-C1-57	—	—	—
18	Alternator control (ALTC)	—	W42	—	0.5	ME221-C1-68	—	—	—
19	—	—	—	—	—	—	—	—	—
20	—	—	—	—	—	—	—	—	—
21	Evap canister purge valve (PCS)	—	W43	—	0.5	ME221-C1-70	—	—	—
22	—	—	—	—	—	—	—	—	—
23	—	—	—	—	—	—	—	—	—
24	—	—	—	—	—	—	—	—	—

OEM-E

Mating face

Wire side

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	—	—	—	—	—	—	—
2	—	—	—	—	—	—	—	—	—
3	Reverse lockout solenoid (RVS, Type-S)	—	—	—	—	—	—	—	—
4	Logic ground 3 (LG3)	—	W9	—	0.85	SP-GND-1	—	—	—
5	Sensor ground 3 (SG3)	—	W16	—	0.5	SP-0V-1	—	—	—
6	Sensor 5V supply 3 (VCC3)	—	W21	—	0.5	ME221-C1-76	—	—	—
7	—	—	—	—	—	—	—	—	—
8	Main relay control (MRLY)	—	W34	—	0.5	ME221-C1-73	—	—	—
9	A/F sensor heater relay control (AFSHTCR)	—	W38	—	0.5	ME221-C1-69	—	—	—
10	Ignition switch signal (IG1)	—	—	—	—	—	—	—	—
11	—	—	—	—	—	—	—	—	—
12	Radiator fan control (FANC)	—	W35	—	0.5	ME221-C1-12	—	—	—
13	Multiplex communication (SEFMJ)	—	—	—	—	—	—	—	—
14	Fuel tank pressure sensor (FTP)	—	—	—	—	—	—	—	—
15	Electrical load detector (ELD)	—	—	—	—	—	—	—	—
16	Power steering pressure switch (PSPSW)	—	—	—	—	—	—	—	—
17	Immobilizer fuel pump relay (IMO FPR)	—	W36	—	0.5	ME221-C1-74	—	—	—
18	A/C clutch relay (ACC)	—	W37	—	0.5	ME221-C1-44	—	—	—
19	Evap vent shut valve (VSV)	—	W44	—	0.5	ME221-C1-71	—	—	—
20	Secondary heated O2 sensor (SHO2S)	—	W50	—	0.5	ME221-C1-17	—	—	—
21	Secondary O2 heater control (SO2SHTC)	—	W39	—	0.5	ME221-C1-16	—	—	—
22	Brake switch (BKSW)	—	—	—	—	—	—	—	—
23	K-line (diagnostic)	—	—	—	—	—	—	—	—
24	—	—	—	—	—	—	—	—	—
25	Engine speed pulse / tacho (NEP)	—	W45	—	0.5	ME221-C1-79	—	—	—
26	Vehicle speed output (VSSOUT)	—	—	—	—	—	—	—	—
27	Immobilizer code (IMOCD)	—	—	—	—	—	—	—	—
28	—	—	—	—	—	—	—	—	—
29	Service check signal (SCS)	—	—	—	—	—	—	—	—
30	Write enable signal (WEN)	—	—	—	—	—	—	—	—
31	Malfunction indicator lamp (MIL)	—	—	—	—	—	—	—	—

SP-0V

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W17	—	0.5	ME221-C1-52	—	—	—
1	—	—	W14	—	0.5	OEM-A-23	—	—	—
1	—	—	W15	—	0.5	OEM-A-24	—	—	—
1	—	—	W16	—	0.5	OEM-E-5	—	—	—
1	—	—	W18	—	0.5	ME221-C1-84	—	—	—

SP-14V

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W1	—	0.85	OEM-A-2	—	—	—
1	—	—	W2	—	0.85	OEM-A-3	—	—	—
1	—	—	W3	—	0.85	ME221-C1-15	—	—	—
1	—	—	W4	—	0.85	ME221-C1-64	—	—	—

SP-GND

Cavity	Function	Signal	Wire	Colour	Gauge (mm²)	Destination	Terminal	Seal	Plug
1	—	—	W5	—	0.85	OEM-A-4	—	—	—
1	—	—	W6	—	0.85	OEM-A-5	—	—	—
1	—	—	W7	—	0.85	OEM-A-8	—	—	—
1	—	—	W8	—	0.85	OEM-A-9	—	—	—
1	—	—	W9	—	0.85	OEM-E-4	—	—	—
1	—	—	W10	—	0.85	ME221-C1-10	—	—	—
1	—	—	W11	—	0.85	ME221-C1-61	—	—	—
1	—	—	W12	—	0.85	ME221-C1-89	—	—	—
1	—	—	W13	—	0.85	ME221-C1-90	—	—	—

Pin map

OEM point	OEM function	OEM family	Target point	Target function	Target family	Evidence
OEM-A-1	Knock sensor (KS)	knock_in	ME221-C1-53	KNOCK 1 SIGNAL	knock_in	single_source
OEM-A-10	A/F sensor heater control (AFSHTC)	low_side_out	ME221-C1-39	LOW SIDE 6	low_side_out	single_source
OEM-A-12	Idle air control valve (IACV)	low_side_out	—	—	—	single_source
OEM-A-13	Ignition coil 4 (IGPLS4)	ignition_out	ME221-C1-1	COIL 4	ignition_out	single_source
OEM-A-14	Ignition coil 3 (IGPLS3)	ignition_out	ME221-C1-2	COIL 3	ignition_out	single_source
OEM-A-15	Ignition coil 2 (IGPLS2)	ignition_out	ME221-C1-31	COIL 2	ignition_out	single_source
OEM-A-16	Ignition coil 1 (IGPLS1)	ignition_out	ME221-C1-32	COIL 1	ignition_out	single_source
OEM-A-18	Neutral position switch (NC)	digital_in	ME221-C1-6	DIG_IN 1	digital_in	single_source
OEM-A-19	Camshaft position A (CMP A)	trigger_in	ME221-C1-22	CAM A VR+	trigger_in	single_source
OEM-A-2	Ignition power 2 (IGP2)	power_in	ME221-C1-15 + ME221-C1-64	IGN +12V + VBAT	power_in	single_source
OEM-A-20	Sensor 5V supply 2 (VCC2)	vref	ME221-C1-45	5V REF	vref	single_source
OEM-A-21	Sensor 5V supply 1 (VCC1)	vref	ME221-C1-46	5V REF	vref	single_source
OEM-A-23	Sensor ground 2 (SG2)	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-A-24	Sensor ground 1 (SG1)	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-A-28	A/F sensor - (AFS-, wideband Vs)	wb_vs	ME221-C1-19	LSU UN	wb_vs	single_source
OEM-A-29	Throttle position sensor (TPS)	analog_in	ME221-C1-56	ANA VOLT 2	analog_in	single_source
OEM-A-3	Ignition power 1 (IGP1)	power_in	ME221-C1-15 + ME221-C1-64	IGN +12V + VBAT	power_in	single_source
OEM-A-30	Manifold absolute pressure (MAP)	analog_in	ME221-C1-26	ANA VOLT 1	analog_in	single_source
OEM-A-31	A/F sensor + (AFS+, wideband Ip)	wb_ip	ME221-C1-50	LSU IP	wb_ip	single_source
OEM-A-4	Power ground 2 (PG2)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-A-5	Power ground 1 (PG1)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-A-6	Camshaft position B (CMP B)	trigger_in	ME221-C1-23	CAM A VR-	trigger_in	single_source
OEM-A-7	Crank position sensor (CKP)	trigger_in	ME221-C1-81	CRANK VR+	trigger_in	single_source
OEM-A-8	Logic ground 2 (LG2)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-A-9	Logic ground 1 (LG1)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-B-1	VTC oil control solenoid (+)	low_side_out	ME221-C1-67	Stepper 1 / A1	hbridge_out	single_source
OEM-B-10	Alternator L signal (ALTL)	digital_in	ME221-C1-7	DIG_IN 2	digital_in	single_source
OEM-B-11	VTEC oil pressure switch (VTPSW)	digital_in	—	—	—	single_source
OEM-B-13	Alternator FR signal (ALTF)	analog_in	ME221-C1-18	ANA VOLT 4	analog_in	single_source
OEM-B-17	Intake air temp sensor (IAT)	temp_in	ME221-C1-57	ANA TEMP 2	temp_in	single_source
OEM-B-18	Alternator control (ALTC)	low_side_out	ME221-C1-68	Stepper 2 / A2	hbridge_out	single_source
OEM-B-2	Injector 4 (INJ4)	injector_out	ME221-C1-3	INJECTOR 4	injector_out	single_source
OEM-B-21	Evap canister purge valve (PCS)	low_side_out	ME221-C1-70	Stepper 3 / B1	hbridge_out	single_source
OEM-B-3	Injector 3 (INJ3)	injector_out	ME221-C1-33	INJECTOR 3	injector_out	single_source
OEM-B-4	Injector 2 (INJ2)	injector_out	ME221-C1-4	INJECTOR 2	injector_out	single_source
OEM-B-5	Injector 1 (INJ1)	injector_out	ME221-C1-63	INJECTOR 1	injector_out	single_source
OEM-B-6	VTEC solenoid (VTS)	low_side_out	—	—	—	single_source
OEM-B-8	Coolant temp sensor (ECT)	temp_in	ME221-C1-86	ANA TEMP 1	temp_in	single_source
OEM-E-10	Ignition switch signal (IG1)	digital_in	—	—	—	single_source
OEM-E-12	Radiator fan control (FANC)	low_side_out	ME221-C1-12	LOW SIDE 2	low_side_out	single_source
OEM-E-13	Multiplex communication (SEFMJ)	serial	—	—	—	single_source
OEM-E-14	Fuel tank pressure sensor (FTP)	analog_in	—	—	—	single_source
OEM-E-15	Electrical load detector (ELD)	analog_in	—	—	—	single_source
OEM-E-16	Power steering pressure switch (PSPSW)	digital_in	—	—	—	single_source
OEM-E-17	Immobilizer fuel pump relay (IMO FPR)	low_side_out	ME221-C1-74	LOW SIDE 3	low_side_out	single_source
OEM-E-18	A/C clutch relay (ACC)	low_side_out	ME221-C1-44	LOW SIDE 4	low_side_out	single_source
OEM-E-19	Evap vent shut valve (VSV)	low_side_out	ME221-C1-71	Stepper 4 / B2	hbridge_out	single_source
OEM-E-20	Secondary heated O2 sensor (SHO2S)	lambda_nb_in	ME221-C1-17	ANA VOLT 3	analog_in	single_source
OEM-E-21	Secondary O2 heater control (SO2SHTC)	low_side_out	ME221-C1-16	LSU HEATER -VE	low_side_out	single_source
OEM-E-22	Brake switch (BKSW)	digital_in	—	—	—	single_source
OEM-E-23	K-line (diagnostic)	serial	—	—	—	single_source
OEM-E-25	Engine speed pulse / tacho (NEP)	tacho_out	ME221-C1-79	TACHOMETER	tacho_out	single_source
OEM-E-26	Vehicle speed output (VSSOUT)	tacho_out	—	—	—	single_source
OEM-E-27	Immobilizer code (IMOCD)	—	—	—	—	single_source
OEM-E-29	Service check signal (SCS)	—	—	—	—	single_source
OEM-E-3	Reverse lockout solenoid (RVS, Type-S)	low_side_out	—	—	—	single_source
OEM-E-30	Write enable signal (WEN)	—	—	—	—	single_source
OEM-E-31	Malfunction indicator lamp (MIL)	low_side_out	—	—	—	single_source
OEM-E-4	Logic ground 3 (LG3)	ground	ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90	GROUND CHASSIS + GROUND + GROUND + GROUND	ground	single_source
OEM-E-5	Sensor ground 3 (SG3)	sensor_ground	ME221-C1-52 + ME221-C1-84	SENSORS GROUND + Sensor Ground	sensor_ground	single_source
OEM-E-6	Sensor 5V supply 3 (VCC3)	vref	ME221-C1-76	5V REF	vref	single_source
OEM-E-8	Main relay control (MRLY)	low_side_out	ME221-C1-73	LOW SIDE 1	low_side_out	single_source
OEM-E-9	A/F sensor heater relay control (AFSHTCR)	low_side_out	ME221-C1-69	LOW SIDE 5	low_side_out	single_source

Cut list

Wire	From	To	Gauge (mm²)	Length	Signal	Ident
W1	OEM-A-2	SP-14V-1	0.85	no route	Ignition power 2 (IGP2)	—
W2	OEM-A-3	SP-14V-1	0.85	no route	Ignition power 1 (IGP1)	—
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-A-4	SP-GND-1	0.85	no route	Power ground 2 (PG2)	—
W6	OEM-A-5	SP-GND-1	0.85	no route	Power ground 1 (PG1)	—
W7	OEM-A-8	SP-GND-1	0.85	no route	Logic ground 2 (LG2)	—
W8	OEM-A-9	SP-GND-1	0.85	no route	Logic ground 1 (LG1)	—
W9	OEM-E-4	SP-GND-1	0.85	no route	Logic ground 3 (LG3)	—
W10	SP-GND-1	ME221-C1-10	0.85	no route	GROUND CHASSIS	—
W11	SP-GND-1	ME221-C1-61	0.85	no route	GROUND	—
W12	SP-GND-1	ME221-C1-89	0.85	no route	GROUND	—
W13	SP-GND-1	ME221-C1-90	0.85	no route	GROUND	—
W14	OEM-A-23	SP-0V-1	0.5	no route	Sensor ground 2 (SG2)	—
W15	OEM-A-24	SP-0V-1	0.5	no route	Sensor ground 1 (SG1)	—
W16	OEM-E-5	SP-0V-1	0.5	no route	Sensor ground 3 (SG3)	—
W17	SP-0V-1	ME221-C1-52	0.5	no route	SENSORS GROUND	—
W18	SP-0V-1	ME221-C1-84	0.5	no route	Sensor Ground	—
W19	OEM-A-20	ME221-C1-45	0.5	no route	Sensor 5V supply 2 (VCC2)	—
W20	OEM-A-21	ME221-C1-46	0.5	no route	Sensor 5V supply 1 (VCC1)	—
W21	OEM-E-6	ME221-C1-76	0.5	no route	Sensor 5V supply 3 (VCC3)	—
W22	OEM-A-7	ME221-C1-81	0.5	no route	Crank position sensor (CKP)	—
W23	OEM-A-19	ME221-C1-22	0.5	no route	Camshaft position A (CMP A)	—
W24	OEM-A-6	ME221-C1-23	0.5	no route	Camshaft position B (CMP B)	—
W25	OEM-A-1	ME221-C1-53	0.5	no route	Knock sensor (KS)	—
W26	OEM-A-16	ME221-C1-32	0.5	no route	Ignition coil 1 (IGPLS1)	—
W27	OEM-A-15	ME221-C1-31	0.5	no route	Ignition coil 2 (IGPLS2)	—
W28	OEM-A-14	ME221-C1-2	0.5	no route	Ignition coil 3 (IGPLS3)	—
W29	OEM-A-13	ME221-C1-1	0.5	no route	Ignition coil 4 (IGPLS4)	—
W30	OEM-B-5	ME221-C1-63	0.5	no route	Injector 1 (INJ1)	—
W31	OEM-B-4	ME221-C1-4	0.5	no route	Injector 2 (INJ2)	—
W32	OEM-B-3	ME221-C1-33	0.5	no route	Injector 3 (INJ3)	—
W33	OEM-B-2	ME221-C1-3	0.5	no route	Injector 4 (INJ4)	—
W34	OEM-E-8	ME221-C1-73	0.5	no route	Main relay control (MRLY)	—
W35	OEM-E-12	ME221-C1-12	0.5	no route	Radiator fan control (FANC)	—
W36	OEM-E-17	ME221-C1-74	0.5	no route	Immobilizer fuel pump relay (IMO FPR)	—
W37	OEM-E-18	ME221-C1-44	0.5	no route	A/C clutch relay (ACC)	—
W38	OEM-E-9	ME221-C1-69	0.5	no route	A/F sensor heater relay control (AFSHTCR)	—
W39	OEM-E-21	ME221-C1-16	0.5	no route	Secondary O2 heater control (SO2SHTC)	—
W40	OEM-A-10	ME221-C1-39	0.5	no route	A/F sensor heater control (AFSHTC)	—
W41	OEM-B-1	ME221-C1-67	0.5	no route	VTC oil control solenoid (+)	—
W42	OEM-B-18	ME221-C1-68	0.5	no route	Alternator control (ALTC)	—
W43	OEM-B-21	ME221-C1-70	0.5	no route	Evap canister purge valve (PCS)	—
W44	OEM-E-19	ME221-C1-71	0.5	no route	Evap vent shut valve (VSV)	—
W45	OEM-E-25	ME221-C1-79	0.5	no route	Engine speed pulse / tacho (NEP)	—
W46	OEM-A-31	ME221-C1-50	0.5	no route	A/F sensor + (AFS+, wideband Ip)	—
W47	OEM-A-28	ME221-C1-19	0.5	no route	A/F sensor - (AFS-, wideband Vs)	—
W48	OEM-A-30	ME221-C1-26	0.5	no route	Manifold absolute pressure (MAP)	—
W49	OEM-A-29	ME221-C1-56	0.5	no route	Throttle position sensor (TPS)	—
W50	OEM-E-20	ME221-C1-17	0.5	no route	Secondary heated O2 sensor (SHO2S)	—
W51	OEM-B-8	ME221-C1-86	0.5	no route	Coolant temp sensor (ECT)	—
W52	OEM-B-17	ME221-C1-57	0.5	no route	Intake air temp sensor (IAT)	—
W53	OEM-B-13	ME221-C1-18	0.5	no route	Alternator FR signal (ALTF)	—
W54	OEM-A-18	ME221-C1-6	0.5	no route	Neutral position switch (NC)	—
W55	OEM-B-10	ME221-C1-7	0.5	no route	Alternator L signal (ALTL)	—

Bill of materials

Category	Part number	Manufacturer	Description	Qty	Unit
connector	1318682-6	TE	K-series ECU harness plug A (040-3 HD plug assy, 31P)	1.000	ea
connector	353029-1	TE	K-series ECU harness plug B (040 H/D-3 plug HSG assy, 24P)	1.000	ea
connector	353826-1	TE	K-series ECU harness plug E (040 HD 31P plug HSG assy-B, 31P)	1.000	ea
terminal	316836-1	TE	Multilock 040 III HD socket, tin, 22–18 AWG (0.3–0.85 mm²)	47.000	ea

ECU setup sheet

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

Findings

Open (8)

Severity	Code	Subject	Message
warn	DATASET_GAP	RSX ECU A	6 of 31 cavities on RSX ECU A have no pin data (11,17,22,25,26,27). Anything there is invisible to these checks.
warn	DATASET_GAP	RSX ECU B	11 of 24 cavities on RSX ECU B have no pin data (7,9,12,14,15,16,19,20,22,23,24). Anything there is invisible to these checks.
warn	DATASET_GAP	RSX ECU E	6 of 31 cavities on RSX ECU E have no pin data (1,2,7,11,24,28). Anything there is invisible to these checks.
warn	NET_FAMILY	OEM-B-1 ↔ ME221-C1-67	OEM-B-1 "VTC oil control solenoid (+)" [low_side_out] is wired to ME221-C1-67 "Stepper 1 / A1" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warn	NET_FAMILY	OEM-B-18 ↔ ME221-C1-68	OEM-B-18 "Alternator control (ALTC)" [low_side_out] is wired to ME221-C1-68 "Stepper 2 / A2" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warn	NET_FAMILY	OEM-B-21 ↔ ME221-C1-70	OEM-B-21 "Evap canister purge valve (PCS)" [low_side_out] is wired to ME221-C1-70 "Stepper 3 / B1" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warn	NET_FAMILY	OEM-E-19 ↔ ME221-C1-71	OEM-E-19 "Evap vent shut valve (VSV)" [low_side_out] is wired to ME221-C1-71 "Stepper 4 / B2" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
info	UNMAPPED	OEM	16 optional OEM pins are not mapped: OEM-A-12 Idle air control valve (IACV); OEM-B-11 VTEC oil pressure switch (VTPSW); OEM-B-6 VTEC solenoid (VTS); OEM-E-10 Ignition switch signal (IG1); OEM-E-13 Multiplex communication (SEFMJ); OEM-E-14 Fuel tank pressure sensor (FTP); OEM-E-15 Electrical load detector (ELD); OEM-E-16 Power steering pressure switch (PSPSW); OEM-E-22 Brake switch (BKSW); OEM-E-23 K-line (diagnostic); OEM-E-26 Vehicle speed output (VSSOUT); OEM-E-27 Immobilizer code (IMOCD); OEM-E-29 Service check signal (SCS); OEM-E-3 Reverse lockout solenoid (RVS, Type-S); OEM-E-30 Write enable signal (WEN); OEM-E-31 Malfunction indicator lamp (MIL)

Accepted (0)

Code	Subject	Reason	By

Notes

Auto-mapped by auto_map() from the library pin data on 2026-10-09. Review every wire against both manuals before building. Not wired: - OEM-E 10: Ignition switch signal (IG1): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); Motorsport Electronics ME221 has no dedicated key-on input - OEM-A 12: Idle air control valve (IACV): no free low_side/ls_hs/injector/hbridge rated ≥ 1.0 A on Motorsport Electronics ME221 - OEM-B 6: VTEC solenoid (VTS): no free low_side/ls_hs/injector/hbridge rated ≥ 1.0 A on Motorsport Electronics ME221 - OEM-E 3: Reverse lockout solenoid (RVS, Type-S): no free low_side/ls_hs/injector/hbridge on Motorsport Electronics ME221 - OEM-E 31: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on Motorsport Electronics ME221 - OEM-E 26: Vehicle speed output (VSSOUT): no free frequency_out/tacho/low_side/ls_hs on Motorsport Electronics ME221 - OEM-E 14: Fuel tank pressure sensor (FTP): no free analog_0_5 on Motorsport Electronics ME221 - OEM-E 15: Electrical load detector (ELD): no free analog_0_5 on Motorsport Electronics ME221 - OEM-B 11: VTEC oil pressure switch (VTPSW): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-E 16: Power steering pressure switch (PSPSW): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-E 22: Brake switch (BKSW): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-E 13: Multiplex communication (SEFMJ): no free k_line on Motorsport Electronics ME221 - OEM-E 23: K-line (diagnostic): no free k_line on Motorsport Electronics ME221 - OEM-E 27: Immobilizer code (IMOCD): not classified in the library; wire by hand - OEM-E 29: Service check signal (SCS): not classified in the library; wire by hand - OEM-E 30: Write enable signal (WEN): not classified in the library; wire by hand

Sources

Reliability	Kind	Title	URL	Archive	Captured	SHA-256
4	vendor_doc	Motorsport Electronics GEN2 ME221/ME360/ME442 wire-in pinout	https://motorsport-electronics.co.uk/onlinehelp/html/ME442ME360ME221GEN2Wire-InPinout.html	—	—	—
3	forum	FFS TechNet: K-series 02-06 RSX ECU pin diagram (Helm)	https://ff-squad.com/technet2/k-series-02-06-rsx-ecu-pin-diagram/	archive	2026-10-05	b2b85002666e