Honda NSX NA2 1997-2005 (C32B) → Motorsport Electronics ME221 (auto)
Honda NSX NA2 1997-2005 (C32B) — 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 | 10: read the Findings page before cutting any wire |
| Size of the job | 65 wires · 10 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 | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-A-13 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-G-10 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-G-2 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-G-3 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-G-9 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-14V-1 | ME221-C1-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-14V-1 | ME221-C1-64 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-A-12 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-25 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-G-7 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-G-8 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | ME221-C1-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-GND-1 | ME221-C1-61 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-GND-1 | ME221-C1-89 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-GND-1 | ME221-C1-90 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-A-26 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-B-13 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-B-14 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-B-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-B-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-B-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-D-11 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-F-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-F-2 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | SP-0V-1 | ME221-C1-52 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | SP-0V-1 | ME221-C1-84 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-D-10 | ME221-C1-46 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-F-1 | ME221-C1-76 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-F-14 | ME221-C1-45 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-8 | ME221-C1-80 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-7 | ME221-C1-81 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-6 | ME221-C1-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B-5 | ME221-C1-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-D-13 | ME221-C1-53 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-11 | ME221-C1-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-24 | ME221-C1-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-B-12 | ME221-C1-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-B-11 | ME221-C1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-1 | ME221-C1-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-2 | ME221-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-3 | ME221-C1-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-14 | ME221-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-15 | ME221-C1-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-16 | ME221-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-5 | ME221-C1-73 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-F-19 | ME221-C1-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-F-20 | ME221-C1-74 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-D-9 | ME221-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-F-13 | ME221-C1-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-F-12 | ME221-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-D-12 | ME221-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-D-7 | ME221-C1-86 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-F-4 | ME221-C1-44 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-A-8 | ME221-C1-69 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-10 | ME221-C1-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-A-22 | ME221-C1-39 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-A-23 | ME221-C1-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-A-9 | ME221-C1-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-A-17 | ME221-C1-72 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-A-20 | ME221-C1-43 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-C-8 | ME221-C1-79 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-D-8 | ME221-C1-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-C-7 | ME221-C1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-F-16 | 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 | Reading |
|---|---|---|---|---|---|
| 1 | ME221-C1-15 | ME221-C1-52 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | ME221-C1-10 | ME221-C1-15 | open (OL) | power ground must not touch +12 V supply | |
| 3 | ME221-C1-10 | ME221-C1-45 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | ME221-C1-10 | ME221-C1-46 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | ME221-C1-10 | ME221-C1-76 | open (OL) | power ground must not touch 5 V sensor reference | |
| 6 | ME221-C1-15 | ME221-C1-45 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 7 | ME221-C1-15 | ME221-C1-46 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | ME221-C1-15 | ME221-C1-76 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 9 | ME221-C1-52 | ME221-C1-45 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 10 | ME221-C1-52 | ME221-C1-46 | open (OL) | sensor ground 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 | — | W39 | — | 0.5 | OEM-B-11 | — | — | — |
| 10 | GROUND CHASSIS | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | LOW SIDE 2 | — | W47 | — | 0.5 | OEM-F-19 | — | — | — |
| 14 | LSU +12V | — | — | — | — | — | — | — | — |
| 15 | IGN +12V | — | W7 | — | 0.85 | SP-14V-1 | — | — | — |
| 16 | LSU HEATER -VE | — | W56 | — | 0.5 | OEM-A-10 | — | — | — |
| 17 | ANA VOLT 3 | — | W51 | — | 0.5 | OEM-F-12 | — | — | — |
| 18 | ANA VOLT 4 | — | W52 | — | 0.5 | OEM-D-12 | — | — | — |
| 19 | LSU UN | — | — | — | — | — | — | — | — |
| 2 | COIL 3 | — | W38 | — | 0.5 | OEM-B-12 | — | — | — |
| 20 | LSU VM | — | — | — | — | — | — | — | — |
| 21 | CAN 1 HIGH | — | — | — | — | — | — | — | — |
| 22 | CAM A VR+ | — | W33 | — | 0.5 | OEM-B-6 | — | — | — |
| 23 | CAM A VR- | — | W34 | — | 0.5 | OEM-B-5 | — | — | — |
| 24 | SERIAL 1 GROUND | — | — | — | — | — | — | — | — |
| 25 | SERIAL 1 TX | — | — | — | — | — | — | — | — |
| 26 | ANA VOLT 1 | — | W49 | — | 0.5 | OEM-D-9 | — | — | — |
| 3 | INJECTOR 4 | — | W43 | — | 0.5 | OEM-A-14 | — | — | — |
| 31 | COIL 2 | — | W37 | — | 0.5 | OEM-A-24 | — | — | — |
| 32 | COIL 1 | — | W36 | — | 0.5 | OEM-A-11 | — | — | — |
| 33 | INJECTOR 3 | — | W42 | — | 0.5 | OEM-A-3 | — | — | — |
| 35 | USB D+ | — | — | — | — | — | — | — | — |
| 36 | USB D- | — | — | — | — | — | — | — | — |
| 37 | LOW SIDE RELAY 11 | — | W58 | — | 0.5 | OEM-A-23 | — | — | — |
| 38 | USB VBUS | — | — | — | — | — | — | — | — |
| 39 | LOW SIDE 6 | — | W57 | — | 0.5 | OEM-A-22 | — | — | — |
| 4 | INJECTOR 2 | — | W41 | — | 0.5 | OEM-A-2 | — | — | — |
| 4 | INJECTOR 2 | — | W45 | — | 0.5 | OEM-A-16 | — | — | — |
| 41 | USB GROUND | — | — | — | — | — | — | — | — |
| 42 | LOW SIDE RELAY 12 | — | W59 | — | 0.5 | OEM-A-9 | — | — | — |
| 43 | LOW SIDE RELAY 14 | — | W61 | — | 0.5 | OEM-A-20 | — | — | — |
| 44 | LOW SIDE 4 | — | W54 | — | 0.5 | OEM-F-4 | — | — | — |
| 45 | 5V REF | — | W30 | — | 0.5 | OEM-F-14 | — | — | — |
| 46 | 5V REF | — | W28 | — | 0.5 | OEM-D-10 | — | — | — |
| 49 | LSU IA | — | — | — | — | — | — | — | — |
| 50 | LSU IP | — | — | — | — | — | — | — | — |
| 51 | CAN 1 LOW | — | — | — | — | — | — | — | — |
| 52 | SENSORS GROUND | — | W26 | — | 0.5 | SP-0V-1 | — | — | — |
| 53 | KNOCK 1 SIGNAL | — | W35 | — | 0.5 | OEM-D-13 | — | — | — |
| 55 | SERIAL 1 RX | — | — | — | — | — | — | — | — |
| 56 | ANA VOLT 2 | — | W50 | — | 0.5 | OEM-F-13 | — | — | — |
| 57 | ANA TEMP 2 | — | W63 | — | 0.5 | OEM-D-8 | — | — | — |
| 6 | DIG_IN 1 | — | W64 | — | 0.5 | OEM-C-7 | — | — | — |
| 61 | GROUND | — | W14 | — | 0.85 | SP-GND-1 | — | — | — |
| 63 | INJECTOR 1 | — | W40 | — | 0.5 | OEM-A-1 | — | — | — |
| 63 | INJECTOR 1 | — | W44 | — | 0.5 | OEM-A-15 | — | — | — |
| 64 | VBAT | — | W8 | — | 0.85 | SP-14V-1 | — | — | — |
| 67 | Stepper 1 / A1 | — | — | — | — | — | — | — | — |
| 68 | Stepper 2 / A2 | — | — | — | — | — | — | — | — |
| 69 | LOW SIDE 5 | — | W55 | — | 0.5 | OEM-A-8 | — | — | — |
| 7 | DIG_IN 2 | — | W65 | — | 0.5 | OEM-F-16 | — | — | — |
| 70 | Stepper 3 / B1 | — | — | — | — | — | — | — | — |
| 71 | Stepper 4 / B2 | — | — | — | — | — | — | — | — |
| 72 | LOW SIDE RELAY 13 | — | W60 | — | 0.5 | OEM-A-17 | — | — | — |
| 73 | LOW SIDE 1 | — | W46 | — | 0.5 | OEM-A-5 | — | — | — |
| 74 | LOW SIDE 3 | — | W48 | — | 0.5 | OEM-F-20 | — | — | — |
| 76 | 5V REF | — | W29 | — | 0.5 | OEM-F-1 | — | — | — |
| 79 | TACHOMETER | — | W62 | — | 0.5 | OEM-C-8 | — | — | — |
| 80 | CRANK VR+ | — | W31 | — | 0.5 | OEM-B-8 | — | — | — |
| 81 | CRANK VR- | — | W32 | — | 0.5 | OEM-B-7 | — | — | — |
| 84 | Sensor Ground | — | W27 | — | 0.5 | SP-0V-1 | — | — | — |
| 86 | ANA TEMP 1 | — | W53 | — | 0.5 | OEM-D-7 | — | — | — |
| 89 | GROUND | — | W15 | — | 0.85 | SP-GND-1 | — | — | — |
| 90 | GROUND | — | W16 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 (INJ1) | — | W40 | — | 0.5 | ME221-C1-63 | — | — | — |
| 10 | Rear secondary O2 heater (RSO2SHTC) | — | W56 | — | 0.5 | ME221-C1-16 | — | — | — |
| 11 | Ignition coil 1 (IGN COIL1) | — | W36 | — | 0.5 | ME221-C1-32 | — | — | — |
| 12 | Power ground (PG1) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 13 | ECM power source (IGP1) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Injector 4 (INJ4) | — | W43 | — | 0.5 | ME221-C1-3 | — | — | — |
| 15 | Injector 5 (INJ5) | — | W44 | — | 0.5 | ME221-C1-63 | — | — | — |
| 16 | Injector 6 (INJ6) | — | W45 | — | 0.5 | ME221-C1-4 | — | — | — |
| 17 | EVAP bypass solenoid (2WBS) | — | W60 | — | 0.5 | ME221-C1-72 | — | — | — |
| 2 | Injector 2 (INJ2) | — | W41 | — | 0.5 | ME221-C1-4 | — | — | — |
| 20 | IAB control solenoid (IABCS) | — | W61 | — | 0.5 | ME221-C1-43 | — | — | — |
| 21 | EVAP purge control solenoid (PCS) | — | — | — | — | — | — | — | — |
| 22 | Front primary O2 heater (FPO2SHTC) | — | W57 | — | 0.5 | ME221-C1-39 | — | — | — |
| 23 | Rear primary O2 heater (RPO2SHTC) | — | W58 | — | 0.5 | ME221-C1-37 | — | — | — |
| 24 | Ignition coil 2 (IGN COIL2) | — | W37 | — | 0.5 | ME221-C1-31 | — | — | — |
| 25 | Power ground (PG2) | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 26 | Logic ground (LG1) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Injector 3 (INJ3) | — | W42 | — | 0.5 | ME221-C1-33 | — | — | — |
| 4 | EVAP canister vent shut valve (VSV) | — | — | — | — | — | — | — | — |
| 5 | Fuel pump relay (FLR1) | — | W46 | — | 0.5 | ME221-C1-73 | — | — | — |
| 6 | EGR control solenoid (ESOL) | — | — | — | — | — | — | — | — |
| 7 | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
| 8 | A/C clutch relay (ACC) | — | W55 | — | 0.5 | ME221-C1-69 | — | — | — |
| 9 | Front secondary O2 heater (FSO2SHTC) | — | W59 | — | 0.5 | ME221-C1-42 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | VTEC pressure switch front (VTP SWF) | — | — | — | — | — | — | — | — |
| 10 | Ignition coil 5 (IGN COIL5) | — | — | — | — | — | — | — | — |
| 11 | Ignition coil 4 (IGN COIL4) | — | W39 | — | 0.5 | ME221-C1-1 | — | — | — |
| 12 | Ignition coil 3 (IGN COIL3) | — | W38 | — | 0.5 | ME221-C1-2 | — | — | — |
| 13 | Cylinder position sensor 2 return (CYP 2M) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | Cylinder position sensor 1 return (CYP 1M) | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | Crank position sensor 2 return (CKP 2M) | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Crank position sensor 1 return (CKP 1M) | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Ignition coil 6 (IGN COIL6) | — | — | — | — | — | — | — | — |
| 3 | VTEC pressure switch rear (VTP SWR) | — | — | — | — | — | — | — | — |
| 4 | Neutral switch (NT SW, M/T) | — | — | — | — | — | — | — | — |
| 5 | Cylinder position sensor 2 + (CYP 2P) | — | W34 | — | 0.5 | ME221-C1-23 | — | — | — |
| 6 | Cylinder position sensor 1 + (CYP 1P) | — | W33 | — | 0.5 | ME221-C1-22 | — | — | — |
| 7 | Crank position sensor 2 + (CKP 2P) | — | W32 | — | 0.5 | ME221-C1-81 | — | — | — |
| 8 | Crank position sensor 1 + (CKP 1P) | — | W31 | — | 0.5 | ME221-C1-80 | — | — | — |
| 9 | Logic ground (LG2) | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECM power source (IGP2) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Clutch switch (MTCLS, M/T) | — | — | — | — | — | — | — | — |
| 6 | Starter switch (STS) | — | — | — | — | — | — | — | — |
| 7 | Vehicle speed sensor (VSS) | — | W64 | — | 0.5 | ME221-C1-6 | — | — | — |
| 8 | Engine speed pulse (NEP) | — | W62 | — | 0.5 | ME221-C1-79 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Backup power (VBU) | — | — | — | — | — | — | — | — |
| 10 | Sensor 5V supply (VCC2) | — | W28 | — | 0.5 | ME221-C1-46 | — | — | — |
| 11 | Sensor ground (SG2) | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Throttle position sensor (TPS) | — | W52 | — | 0.5 | ME221-C1-18 | — | — | — |
| 13 | Knock sensor front (KSF) | — | W35 | — | 0.5 | ME221-C1-53 | — | — | — |
| 16 | Front secondary O2 signal (O2S FS) | — | — | — | — | — | — | — | — |
| 17 | Rear secondary O2 signal (O2S RS) | — | — | — | — | — | — | — | — |
| 18 | Front primary O2 signal (O2S FP) | — | — | — | — | — | — | — | — |
| 19 | Rear primary O2 signal (O2S RP) | — | — | — | — | — | — | — | — |
| 2 | Knock sensor rear (KSR) | — | — | — | — | — | — | — | — |
| 20 | EGR valve lift sensor (EGRL) | — | — | — | — | — | — | — | — |
| 4 | K-line diagnostics | — | — | — | — | — | — | — | — |
| 7 | Engine coolant temperature (ECT) | — | W53 | — | 0.5 | ME221-C1-86 | — | — | — |
| 8 | Intake air temperature (IAT) | — | W63 | — | 0.5 | ME221-C1-57 | — | — | — |
| 9 | MAP sensor | — | W49 | — | 0.5 | ME221-C1-26 | — | — | — |
OEM-F
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sensor 5V supply (VCC1) | — | W29 | — | 0.5 | ME221-C1-76 | — | — | — |
| 12 | Accelerator pedal position 2 (AP2) | — | W51 | — | 0.5 | ME221-C1-17 | — | — | — |
| 13 | Accelerator pedal position 1 (AP1) | — | W50 | — | 0.5 | ME221-C1-56 | — | — | — |
| 14 | Accelerator pedal 5V supply (VCC3) | — | W30 | — | 0.5 | ME221-C1-45 | — | — | — |
| 15 | Accelerator pedal ground (SG3) | — | W24 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Brake switch 1 (BKSW1) | — | W65 | — | 0.5 | ME221-C1-7 | — | — | — |
| 19 | VTEC solenoid front (VT SOLF) | — | W47 | — | 0.5 | ME221-C1-12 | — | — | — |
| 2 | Sensor ground (SG1) | — | W25 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | VTEC solenoid rear (VT SOLR) | — | W48 | — | 0.5 | ME221-C1-74 | — | — | — |
| 4 | Fuel pump relay 2 (FLR2) | — | W54 | — | 0.5 | ME221-C1-44 | — | — | — |
| 6 | Brake switch 2 (BKSW2) | — | — | — | — | — | — | — | — |
OEM-G
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Throttle motor common power phases 2&4 (COM2) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 11 | Throttle motor phase 3 (PM3) | — | — | — | — | — | — | — | — |
| 12 | Throttle motor phase 4 (PM4) | — | — | — | — | — | — | — | — |
| 2 | Throttle motor power source 1 (IGM1) | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | Throttle motor power source 2 (IGM2) | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Throttle motor phase 1 (PM1) | — | — | — | — | — | — | — | — |
| 5 | Throttle motor phase 2 (PM2) | — | — | — | — | — | — | — | — |
| 7 | Throttle motor ground 1 (PGM1) | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Throttle motor ground 2 (PGM2) | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 9 | Throttle motor common power phases 1&3 (COM1) | — | W6 | — | 0.85 | SP-14V-1 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W17 | — | 0.5 | OEM-A-26 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-B-13 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-B-14 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-B-15 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-B-16 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-B-9 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-D-11 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | OEM-F-15 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | OEM-F-2 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | ME221-C1-52 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | ME221-C1-84 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-13 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-G-10 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-G-2 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-G-3 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-G-9 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | ME221-C1-15 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | ME221-C1-64 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.85 | OEM-A-12 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | OEM-A-25 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | OEM-G-7 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | OEM-G-8 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | ME221-C1-10 | — | — | — |
| 1 | — | — | W14 | — | 0.85 | ME221-C1-61 | — | — | — |
| 1 | — | — | W15 | — | 0.85 | ME221-C1-89 | — | — | — |
| 1 | — | — | W16 | — | 0.85 | ME221-C1-90 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Injector 1 (INJ1) | injector_out | ME221-C1-63 | INJECTOR 1 | injector_out | single_source | |
| OEM-A-10 | Rear secondary O2 heater (RSO2SHTC) | low_side_out | ME221-C1-16 | LSU HEATER -VE | low_side_out | single_source | |
| OEM-A-11 | Ignition coil 1 (IGN COIL1) | ignition_out | ME221-C1-32 | COIL 1 | ignition_out | single_source | |
| OEM-A-12 | Power ground (PG1) | ground | ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | single_source | |
| OEM-A-13 | ECM power source (IGP1) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-A-14 | Injector 4 (INJ4) | injector_out | ME221-C1-3 | INJECTOR 4 | injector_out | single_source | |
| OEM-A-15 | Injector 5 (INJ5) | injector_out | ME221-C1-63 | INJECTOR 1 | injector_out | single_source | |
| OEM-A-16 | Injector 6 (INJ6) | injector_out | ME221-C1-4 | INJECTOR 2 | injector_out | single_source | |
| OEM-A-17 | EVAP bypass solenoid (2WBS) | low_side_out | ME221-C1-72 | LOW SIDE RELAY 13 | low_side_out | single_source | |
| OEM-A-2 | Injector 2 (INJ2) | injector_out | ME221-C1-4 | INJECTOR 2 | injector_out | single_source | |
| OEM-A-20 | IAB control solenoid (IABCS) | low_side_out | ME221-C1-43 | LOW SIDE RELAY 14 | low_side_out | single_source | |
| OEM-A-21 | EVAP purge control solenoid (PCS) | low_side_out | — | — | — | single_source | |
| OEM-A-22 | Front primary O2 heater (FPO2SHTC) | low_side_out | ME221-C1-39 | LOW SIDE 6 | low_side_out | single_source | |
| OEM-A-23 | Rear primary O2 heater (RPO2SHTC) | low_side_out | ME221-C1-37 | LOW SIDE RELAY 11 | low_side_out | single_source | |
| OEM-A-24 | Ignition coil 2 (IGN COIL2) | ignition_out | ME221-C1-31 | COIL 2 | ignition_out | single_source | |
| OEM-A-25 | Power ground (PG2) | ground | ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | single_source | |
| OEM-A-26 | Logic ground (LG1) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-A-3 | Injector 3 (INJ3) | injector_out | ME221-C1-33 | INJECTOR 3 | injector_out | single_source | |
| OEM-A-4 | EVAP canister vent shut valve (VSV) | low_side_out | — | — | — | single_source | |
| OEM-A-5 | Fuel pump relay (FLR1) | low_side_out | ME221-C1-73 | LOW SIDE 1 | low_side_out | single_source | |
| OEM-A-6 | EGR control solenoid (ESOL) | low_side_out | — | — | — | single_source | |
| OEM-A-7 | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | single_source | |
| OEM-A-8 | A/C clutch relay (ACC) | low_side_out | ME221-C1-69 | LOW SIDE 5 | low_side_out | single_source | |
| OEM-A-9 | Front secondary O2 heater (FSO2SHTC) | low_side_out | ME221-C1-42 | LOW SIDE RELAY 12 | low_side_out | single_source | |
| OEM-B-1 | VTEC pressure switch front (VTP SWF) | digital_in | — | — | — | single_source | |
| OEM-B-10 | Ignition coil 5 (IGN COIL5) | ignition_out | — | — | — | single_source | |
| OEM-B-11 | Ignition coil 4 (IGN COIL4) | ignition_out | ME221-C1-1 | COIL 4 | ignition_out | single_source | |
| OEM-B-12 | Ignition coil 3 (IGN COIL3) | ignition_out | ME221-C1-2 | COIL 3 | ignition_out | single_source | |
| OEM-B-13 | Cylinder position sensor 2 return (CYP 2M) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-B-14 | Cylinder position sensor 1 return (CYP 1M) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-B-15 | Crank position sensor 2 return (CKP 2M) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-B-16 | Crank position sensor 1 return (CKP 1M) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-B-2 | Ignition coil 6 (IGN COIL6) | ignition_out | — | — | — | single_source | |
| OEM-B-3 | VTEC pressure switch rear (VTP SWR) | digital_in | — | — | — | single_source | |
| OEM-B-4 | Neutral switch (NT SW, M/T) | digital_in | — | — | — | single_source | |
| OEM-B-5 | Cylinder position sensor 2 + (CYP 2P) | trigger_in | ME221-C1-23 | CAM A VR- | trigger_in | single_source | |
| OEM-B-6 | Cylinder position sensor 1 + (CYP 1P) | trigger_in | ME221-C1-22 | CAM A VR+ | trigger_in | single_source | |
| OEM-B-7 | Crank position sensor 2 + (CKP 2P) | trigger_in | ME221-C1-81 | CRANK VR- | trigger_in | single_source | |
| OEM-B-8 | Crank position sensor 1 + (CKP 1P) | trigger_in | ME221-C1-80 | CRANK VR+ | trigger_in | single_source | |
| OEM-B-9 | Logic ground (LG2) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-C-1 | ECM power source (IGP2) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-C-4 | Clutch switch (MTCLS, M/T) | digital_in | — | — | — | single_source | |
| OEM-C-6 | Starter switch (STS) | digital_in | — | — | — | single_source | |
| OEM-C-7 | Vehicle speed sensor (VSS) | digital_in | ME221-C1-6 | DIG_IN 1 | digital_in | single_source | |
| OEM-C-8 | Engine speed pulse (NEP) | tacho_out | ME221-C1-79 | TACHOMETER | tacho_out | single_source | |
| OEM-D-1 | Backup power (VBU) | power_in | — | — | — | single_source | |
| OEM-D-10 | Sensor 5V supply (VCC2) | vref | ME221-C1-46 | 5V REF | vref | single_source | |
| OEM-D-11 | Sensor ground (SG2) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-D-12 | Throttle position sensor (TPS) | analog_in | ME221-C1-18 | ANA VOLT 4 | analog_in | single_source | |
| OEM-D-13 | Knock sensor front (KSF) | knock_in | ME221-C1-53 | KNOCK 1 SIGNAL | knock_in | single_source | |
| OEM-D-16 | Front secondary O2 signal (O2S FS) | lambda_nb_in | — | — | — | single_source | |
| OEM-D-17 | Rear secondary O2 signal (O2S RS) | lambda_nb_in | — | — | — | single_source | |
| OEM-D-18 | Front primary O2 signal (O2S FP) | lambda_nb_in | — | — | — | single_source | |
| OEM-D-19 | Rear primary O2 signal (O2S RP) | lambda_nb_in | — | — | — | single_source | |
| OEM-D-2 | Knock sensor rear (KSR) | knock_in | — | — | — | single_source | |
| OEM-D-20 | EGR valve lift sensor (EGRL) | analog_in | — | — | — | single_source | |
| OEM-D-4 | K-line diagnostics | serial | — | — | — | single_source | |
| OEM-D-7 | Engine coolant temperature (ECT) | temp_in | ME221-C1-86 | ANA TEMP 1 | temp_in | single_source | |
| OEM-D-8 | Intake air temperature (IAT) | temp_in | ME221-C1-57 | ANA TEMP 2 | temp_in | single_source | |
| OEM-D-9 | MAP sensor | analog_in | ME221-C1-26 | ANA VOLT 1 | analog_in | single_source | |
| OEM-F-1 | Sensor 5V supply (VCC1) | vref | ME221-C1-76 | 5V REF | vref | single_source | |
| OEM-F-12 | Accelerator pedal position 2 (AP2) | analog_in | ME221-C1-17 | ANA VOLT 3 | analog_in | single_source | |
| OEM-F-13 | Accelerator pedal position 1 (AP1) | analog_in | ME221-C1-56 | ANA VOLT 2 | analog_in | single_source | |
| OEM-F-14 | Accelerator pedal 5V supply (VCC3) | vref | ME221-C1-45 | 5V REF | vref | single_source | |
| OEM-F-15 | Accelerator pedal ground (SG3) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-F-16 | Brake switch 1 (BKSW1) | digital_in | ME221-C1-7 | DIG_IN 2 | digital_in | single_source | |
| OEM-F-19 | VTEC solenoid front (VT SOLF) | low_side_out | ME221-C1-12 | LOW SIDE 2 | low_side_out | single_source | |
| OEM-F-2 | Sensor ground (SG1) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | single_source | |
| OEM-F-20 | VTEC solenoid rear (VT SOLR) | low_side_out | ME221-C1-74 | LOW SIDE 3 | low_side_out | single_source | |
| OEM-F-4 | Fuel pump relay 2 (FLR2) | low_side_out | ME221-C1-44 | LOW SIDE 4 | low_side_out | single_source | |
| OEM-F-6 | Brake switch 2 (BKSW2) | digital_in | — | — | — | single_source | |
| OEM-G-10 | Throttle motor common power phases 2&4 (COM2) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-G-11 | Throttle motor phase 3 (PM3) | hbridge_out | — | — | — | single_source | |
| OEM-G-12 | Throttle motor phase 4 (PM4) | hbridge_out | — | — | — | single_source | |
| OEM-G-2 | Throttle motor power source 1 (IGM1) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-G-3 | Throttle motor power source 2 (IGM2) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-G-4 | Throttle motor phase 1 (PM1) | hbridge_out | — | — | — | single_source | |
| OEM-G-5 | Throttle motor phase 2 (PM2) | hbridge_out | — | — | — | single_source | |
| OEM-G-7 | Throttle motor ground 1 (PGM1) | ground | ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | single_source | |
| OEM-G-8 | Throttle motor ground 2 (PGM2) | ground | ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | single_source | |
| OEM-G-9 | Throttle motor common power phases 1&3 (COM1) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-13 | SP-14V-1 | 0.85 | no route | ECM power source (IGP1) | — | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | no route | ECM power source (IGP2) | — | |
| W3 | OEM-G-10 | SP-14V-1 | 0.85 | no route | Throttle motor common power phases 2&4 (COM2) | — | |
| W4 | OEM-G-2 | SP-14V-1 | 0.85 | no route | Throttle motor power source 1 (IGM1) | — | |
| W5 | OEM-G-3 | SP-14V-1 | 0.85 | no route | Throttle motor power source 2 (IGM2) | — | |
| W6 | OEM-G-9 | SP-14V-1 | 0.85 | no route | Throttle motor common power phases 1&3 (COM1) | — | |
| W7 | SP-14V-1 | ME221-C1-15 | 0.85 | no route | IGN +12V | — | |
| W8 | SP-14V-1 | ME221-C1-64 | 0.85 | no route | VBAT | — | |
| W9 | OEM-A-12 | SP-GND-1 | 0.85 | no route | Power ground (PG1) | — | |
| W10 | OEM-A-25 | SP-GND-1 | 0.85 | no route | Power ground (PG2) | — | |
| W11 | OEM-G-7 | SP-GND-1 | 0.85 | no route | Throttle motor ground 1 (PGM1) | — | |
| W12 | OEM-G-8 | SP-GND-1 | 0.85 | no route | Throttle motor ground 2 (PGM2) | — | |
| W13 | SP-GND-1 | ME221-C1-10 | 0.85 | no route | GROUND CHASSIS | — | |
| W14 | SP-GND-1 | ME221-C1-61 | 0.85 | no route | GROUND | — | |
| W15 | SP-GND-1 | ME221-C1-89 | 0.85 | no route | GROUND | — | |
| W16 | SP-GND-1 | ME221-C1-90 | 0.85 | no route | GROUND | — | |
| W17 | OEM-A-26 | SP-0V-1 | 0.5 | no route | Logic ground (LG1) | — | |
| W18 | OEM-B-13 | SP-0V-1 | 0.5 | no route | Cylinder position sensor 2 return (CYP 2M) | — | |
| W19 | OEM-B-14 | SP-0V-1 | 0.5 | no route | Cylinder position sensor 1 return (CYP 1M) | — | |
| W20 | OEM-B-15 | SP-0V-1 | 0.5 | no route | Crank position sensor 2 return (CKP 2M) | — | |
| W21 | OEM-B-16 | SP-0V-1 | 0.5 | no route | Crank position sensor 1 return (CKP 1M) | — | |
| W22 | OEM-B-9 | SP-0V-1 | 0.5 | no route | Logic ground (LG2) | — | |
| W23 | OEM-D-11 | SP-0V-1 | 0.5 | no route | Sensor ground (SG2) | — | |
| W24 | OEM-F-15 | SP-0V-1 | 0.5 | no route | Accelerator pedal ground (SG3) | — | |
| W25 | OEM-F-2 | SP-0V-1 | 0.5 | no route | Sensor ground (SG1) | — | |
| W26 | SP-0V-1 | ME221-C1-52 | 0.5 | no route | SENSORS GROUND | — | |
| W27 | SP-0V-1 | ME221-C1-84 | 0.5 | no route | Sensor Ground | — | |
| W28 | OEM-D-10 | ME221-C1-46 | 0.5 | no route | Sensor 5V supply (VCC2) | — | |
| W29 | OEM-F-1 | ME221-C1-76 | 0.5 | no route | Sensor 5V supply (VCC1) | — | |
| W30 | OEM-F-14 | ME221-C1-45 | 0.5 | no route | Accelerator pedal 5V supply (VCC3) | — | |
| W31 | OEM-B-8 | ME221-C1-80 | 0.5 | no route | Crank position sensor 1 + (CKP 1P) | — | |
| W32 | OEM-B-7 | ME221-C1-81 | 0.5 | no route | Crank position sensor 2 + (CKP 2P) | — | |
| W33 | OEM-B-6 | ME221-C1-22 | 0.5 | no route | Cylinder position sensor 1 + (CYP 1P) | — | |
| W34 | OEM-B-5 | ME221-C1-23 | 0.5 | no route | Cylinder position sensor 2 + (CYP 2P) | — | |
| W35 | OEM-D-13 | ME221-C1-53 | 0.5 | no route | Knock sensor front (KSF) | — | |
| W36 | OEM-A-11 | ME221-C1-32 | 0.5 | no route | Ignition coil 1 (IGN COIL1) | — | |
| W37 | OEM-A-24 | ME221-C1-31 | 0.5 | no route | Ignition coil 2 (IGN COIL2) | — | |
| W38 | OEM-B-12 | ME221-C1-2 | 0.5 | no route | Ignition coil 3 (IGN COIL3) | — | |
| W39 | OEM-B-11 | ME221-C1-1 | 0.5 | no route | Ignition coil 4 (IGN COIL4) | — | |
| W40 | OEM-A-1 | ME221-C1-63 | 0.5 | no route | Injector 1 (INJ1) | — | |
| W41 | OEM-A-2 | ME221-C1-4 | 0.5 | no route | Injector 2 (INJ2) | — | |
| W42 | OEM-A-3 | ME221-C1-33 | 0.5 | no route | Injector 3 (INJ3) | — | |
| W43 | OEM-A-14 | ME221-C1-3 | 0.5 | no route | Injector 4 (INJ4) | — | |
| W44 | OEM-A-15 | ME221-C1-63 | 0.5 | no route | Injector 5 (INJ5) | — | |
| W45 | OEM-A-16 | ME221-C1-4 | 0.5 | no route | Injector 6 (INJ6) | — | |
| W46 | OEM-A-5 | ME221-C1-73 | 0.5 | no route | Fuel pump relay (FLR1) | — | |
| W47 | OEM-F-19 | ME221-C1-12 | 0.5 | no route | VTEC solenoid front (VT SOLF) | — | |
| W48 | OEM-F-20 | ME221-C1-74 | 0.5 | no route | VTEC solenoid rear (VT SOLR) | — | |
| W49 | OEM-D-9 | ME221-C1-26 | 0.5 | no route | MAP sensor | — | |
| W50 | OEM-F-13 | ME221-C1-56 | 0.5 | no route | Accelerator pedal position 1 (AP1) | — | |
| W51 | OEM-F-12 | ME221-C1-17 | 0.5 | no route | Accelerator pedal position 2 (AP2) | — | |
| W52 | OEM-D-12 | ME221-C1-18 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W53 | OEM-D-7 | ME221-C1-86 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W54 | OEM-F-4 | ME221-C1-44 | 0.5 | no route | Fuel pump relay 2 (FLR2) | — | |
| W55 | OEM-A-8 | ME221-C1-69 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W56 | OEM-A-10 | ME221-C1-16 | 0.5 | no route | Rear secondary O2 heater (RSO2SHTC) | — | |
| W57 | OEM-A-22 | ME221-C1-39 | 0.5 | no route | Front primary O2 heater (FPO2SHTC) | — | |
| W58 | OEM-A-23 | ME221-C1-37 | 0.5 | no route | Rear primary O2 heater (RPO2SHTC) | — | |
| W59 | OEM-A-9 | ME221-C1-42 | 0.5 | no route | Front secondary O2 heater (FSO2SHTC) | — | |
| W60 | OEM-A-17 | ME221-C1-72 | 0.5 | no route | EVAP bypass solenoid (2WBS) | — | |
| W61 | OEM-A-20 | ME221-C1-43 | 0.5 | no route | IAB control solenoid (IABCS) | — | |
| W62 | OEM-C-8 | ME221-C1-79 | 0.5 | no route | Engine speed pulse (NEP) | — | |
| W63 | OEM-D-8 | ME221-C1-57 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W64 | OEM-C-7 | ME221-C1-6 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W65 | OEM-F-16 | ME221-C1-7 | 0.5 | no route | Brake switch 1 (BKSW1) | — |
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 (11)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | DBW_SENSOR_INPUT | tps | Only 0 throttle-position track(s) found. An electronic throttle needs two (main and sub) so the ECU can cross-check them. |
| error | NET_MERGED | ME221-C1-4 + OEM-A-16 + OEM-A-2 | 2 different OEM functions share one net: OEM-A-16 Injector 6 (INJ6); OEM-A-2 Injector 2 (INJ2) |
| error | NET_MERGED | ME221-C1-63 + OEM-A-1 + OEM-A-15 | 2 different OEM functions share one net: OEM-A-1 Injector 1 (INJ1); OEM-A-15 Injector 5 (INJ5) |
| error | REQUIRED_UNMAPPED | OEM-B-10 | Required OEM function "Ignition coil 5 (IGN COIL5)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-2 | Required OEM function "Ignition coil 6 (IGN COIL6)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-D-2 | Required OEM function "Knock sensor rear (KSR)" (knock_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-11 | Required OEM function "Throttle motor phase 3 (PM3)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-12 | Required OEM function "Throttle motor phase 4 (PM4)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-4 | Required OEM function "Throttle motor phase 1 (PM1)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-5 | Required OEM function "Throttle motor phase 2 (PM2)" (hbridge_out) is not connected to the new ECU. |
| info | UNMAPPED | OEM | 16 optional OEM pins are not mapped: OEM-A-21 EVAP purge control solenoid (PCS); OEM-A-4 EVAP canister vent shut valve (VSV); OEM-A-6 EGR control solenoid (ESOL); OEM-A-7 Malfunction indicator lamp (MIL); OEM-B-1 VTEC pressure switch front (VTP SWF); OEM-B-3 VTEC pressure switch rear (VTP SWR); OEM-B-4 Neutral switch (NT SW, M/T); OEM-C-4 Clutch switch (MTCLS, M/T); OEM-C-6 Starter switch (STS); OEM-D-16 Front secondary O2 signal (O2S FS); OEM-D-17 Rear secondary O2 signal (O2S RS); OEM-D-18 Front primary O2 signal (O2S FP); OEM-D-19 Rear primary O2 signal (O2S RP); OEM-D-20 EGR valve lift sensor (EGRL); OEM-D-4 K-line diagnostics; OEM-F-6 Brake switch 2 (BKSW2) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-D-1 | 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 - Trigger pattern for Honda C32B not found in the ECU's docs (Trigger-pattern list is only inside MEITE software, not published online) - Only 4 ignition outputs for 6 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 6 injectors: batch / semi-sequential injection - This car has Honda Type 1A (1997+) immobilizer; needs a delete/bypass 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-D 2: Knock sensor rear (KSR): no free knock input on Motorsport Electronics ME221 - OEM-B 10: Ignition coil 5 (IGN COIL5): no free ignition output on Motorsport Electronics ME221 - OEM-B 2: Ignition coil 6 (IGN COIL6): no free ignition output on Motorsport Electronics ME221 - OEM-G 4: Throttle motor phase 1 (PM1): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 5: Throttle motor phase 2 (PM2): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 11: Throttle motor phase 3 (PM3): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 12: Throttle motor phase 4 (PM4): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-D 1: Backup power (VBU): Motorsport Electronics ME221 has no battery-constant input; not needed - OEM-A 21: EVAP purge control solenoid (PCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-A 4: EVAP canister vent shut valve (VSV): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-A 6: EGR control solenoid (ESOL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-A 7: Malfunction indicator lamp (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME221 - OEM-D 16: Front secondary O2 signal (O2S FS): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-D 17: Rear secondary O2 signal (O2S RS): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-D 18: Front primary O2 signal (O2S FP): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-D 19: Rear primary O2 signal (O2S RP): no free o2_narrowband/analog_0_5 on Motorsport Electronics ME221 - OEM-D 20: EGR valve lift sensor (EGRL): no free analog_0_5 on Motorsport Electronics ME221 - OEM-F 6: Brake switch 2 (BKSW2): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-B 1: VTEC pressure switch front (VTP SWF): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-B 3: VTEC pressure switch rear (VTP SWR): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-B 4: Neutral switch (NT SW, M/T): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-C 4: Clutch switch (MTCLS, M/T): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-C 6: Starter switch (STS): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221 - OEM-D 4: K-line diagnostics: no free k_line on Motorsport Electronics ME221
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | 1997-2005 Acura NSX Service Manual §11 (PGM-FI), ECM terminal arrangement | https://www.manualslib.com/manual/1540331/Acura-Nsx-1997.html | — | — | — |
| 4 | vendor_doc | Motorsport Electronics GEN2 ME221/ME360/ME442 wire-in pinout | https://motorsport-electronics.co.uk/onlinehelp/html/ME442ME360ME221GEN2Wire-InPinout.html | — | — | — |