MX-5 Miata Mazdaspeed 2004-05 (BP-ZET turbo, no VVT) → Motorsport Electronics ME442 (auto)
MX-5 Miata Mazdaspeed 2004-05 (BP-ZET turbo, no VVT) — Motorsport Electronics — ME442
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-17
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 | none |
| Size of the job | 66 wires · 9 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-2-P | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | ME442-C1-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | ME442-C1-64 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-4-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | ME442-C1-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | ME442-C1-61 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | ME442-C1-89 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | ME442-C1-90 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-4-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | ME442-C1-52 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | ME442-C1-84 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-4-L | ME442-C1-45 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-3-Y | ME442-C1-80 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-3-V | ME442-C1-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-4-M | ME442-C1-53 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-F | ME442-C1-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-I | ME442-C1-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-A | ME442-C1-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-2-D | ME442-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-2-G | ME442-C1-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-2-J | ME442-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-4-X | ME442-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-4-V | ME442-C1-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-4-P | ME442-C1-86 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-B | ME442-C1-73 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-C | ME442-C1-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-K | ME442-C1-74 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-M | ME442-C1-44 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-3-H | ME442-C1-69 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-O | ME442-C1-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-4-D | RLY1-R-OUT | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | SP-14V-1 | RLY1-R-IN | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | RLY1-R-COIL- | ME442-C1-39 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-4-E | RLY2-R-OUT | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | SP-14V-1 | RLY2-R-IN | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | SP-14V-1 | RLY2-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | RLY2-R-COIL- | ME442-C1-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-3-J | ME442-C1-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-3-P | ME442-C1-72 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-Q | ME442-C1-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-2-E | ME442-C1-43 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-2-F | ME442-C1-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-2-H | ME442-C1-75 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-2-I | ME442-C1-40 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-2-N | ME442-C1-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-2-R | ME442-C1-58 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-3-C | ME442-C1-88 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-3-K | ME442-C1-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-3-O | ME442-C1-79 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-4-AE | ME442-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-4-AA | ME442-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-4-W | ME442-C1-87 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-4-R | ME442-C1-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-4-N | ME442-C1-77 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-4-AD | ME442-C1-78 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-3-T | ME442-C1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-3-S | ME442-C1-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-4-B | ME442-C1-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-4-C | ME442-C1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-4-F | ME442-C1-62 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-4-H | ME442-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-4-I | ME442-C1-48 | 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 | ME442-C1-15 | ME442-C1-10 | open (OL) | +12 V supply must not touch power ground | |
| 2 | ME442-C1-15 | ME442-C1-52 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | ME442-C1-45 | ME442-C1-52 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 4 | RLY1-R-OUT | ME442-C1-52 | open (OL) | +12 V supply must not touch sensor ground | |
| 5 | RLY2-R-OUT | ME442-C1-52 | open (OL) | +12 V supply must not touch sensor ground | |
| 6 | ME442-C1-10 | ME442-C1-45 | open (OL) | power ground must not touch 5 V sensor reference | |
| 7 | ME442-C1-10 | RLY1-R-OUT | open (OL) | power ground must not touch +12 V supply | |
| 8 | ME442-C1-10 | RLY2-R-OUT | open (OL) | power ground must not touch +12 V supply | |
| 9 | ME442-C1-15 | ME442-C1-45 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 10 | RLY1-R-OUT | ME442-C1-45 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 11 | RLY2-R-OUT | ME442-C1-45 | open (OL) | +12 V supply 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
ME442-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | COIL 4 | — | — | — | — | — | — | — | — |
| 10 | GROUND CHASSIS | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | EGT 1 | — | — | — | — | — | — | — | — |
| 12 | LOW SIDE 2 | — | W29 | — | 0.5 | OEM-2-C | — | — | — |
| 13 | LOW SIDE RELAY 15 | — | W46 | — | 0.5 | OEM-2-F | — | — | — |
| 14 | LSU +12V | — | — | — | — | — | — | — | — |
| 15 | IGN +12V | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 16 | LSU HEATER -VE | — | W41 | — | 0.5 | RLY2-R-COIL- | — | — | — |
| 17 | ANA VOLT 3 | — | W54 | — | 0.5 | OEM-4-AE | — | — | — |
| 18 | ANA VOLT 4 | — | W55 | — | 0.5 | OEM-4-AA | — | — | — |
| 19 | LSU UN | — | — | — | — | — | — | — | — |
| 2 | COIL 3 | — | — | — | — | — | — | — | — |
| 20 | LSU VM | — | — | — | — | — | — | — | — |
| 21 | CAN 1 HIGH | — | — | — | — | — | — | — | — |
| 22 | CAM A VR+ | — | W17 | — | 0.5 | OEM-3-V | — | — | — |
| 23 | CAM A VR- | — | — | — | — | — | — | — | — |
| 24 | SERIAL 1 GROUND | — | — | — | — | — | — | — | — |
| 25 | SERIAL 1 TX | — | — | — | — | — | — | — | — |
| 26 | ANA VOLT 1 | — | W25 | — | 0.5 | OEM-4-X | — | — | — |
| 27 | INJECTOR 8 | — | W52 | — | 0.5 | OEM-3-K | — | — | — |
| 28 | INJECTOR 5 | — | W44 | — | 0.5 | OEM-2-Q | — | — | — |
| 29 | COIL 7 | — | — | — | — | — | — | — | — |
| 3 | INJECTOR 4 | — | W24 | — | 0.5 | OEM-2-J | — | — | — |
| 30 | COIL 8 | — | — | — | — | — | — | — | — |
| 31 | COIL 2 | — | W20 | — | 0.5 | OEM-3-I | — | — | — |
| 32 | COIL 1 | — | W19 | — | 0.5 | OEM-3-F | — | — | — |
| 33 | INJECTOR 3 | — | W23 | — | 0.5 | OEM-2-G | — | — | — |
| 34 | DIG_IN 6 | — | W65 | — | 0.5 | OEM-4-H | — | — | — |
| 35 | USB D+ | — | — | — | — | — | — | — | — |
| 36 | USB D- | — | — | — | — | — | — | — | — |
| 37 | LOW SIDE RELAY 11 | — | W33 | — | 0.5 | OEM-2-O | — | — | — |
| 38 | USB VBUS | — | — | — | — | — | — | — | — |
| 39 | LOW SIDE 6 | — | W37 | — | 0.5 | RLY1-R-COIL- | — | — | — |
| 4 | INJECTOR 2 | — | W22 | — | 0.5 | OEM-2-D | — | — | — |
| 40 | LOW SIDE RELAY 17 | — | W48 | — | 0.5 | OEM-2-I | — | — | — |
| 41 | USB GROUND | — | — | — | — | — | — | — | — |
| 42 | LOW SIDE RELAY 12 | — | W42 | — | 0.5 | OEM-3-J | — | — | — |
| 43 | LOW SIDE RELAY 14 | — | W45 | — | 0.5 | OEM-2-E | — | — | — |
| 44 | LOW SIDE 4 | — | W31 | — | 0.5 | OEM-2-M | — | — | — |
| 45 | 5V REF | — | W15 | — | 0.5 | OEM-4-L | — | — | — |
| 46 | 5V REF | — | — | — | — | — | — | — | — |
| 47 | ANA TEMP 4 | — | — | — | — | — | — | — | — |
| 48 | ANA VOLT 7 | — | W66 | — | 0.5 | OEM-4-I | — | — | — |
| 49 | LSU IA | — | — | — | — | — | — | — | — |
| 5 | DIG_IN 4 | — | W63 | — | 0.5 | OEM-4-C | — | — | — |
| 50 | LSU IP | — | — | — | — | — | — | — | — |
| 51 | CAN 1 LOW | — | — | — | — | — | — | — | — |
| 52 | SENSORS GROUND | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 53 | KNOCK 1 SIGNAL | — | W18 | — | 0.5 | OEM-4-M | — | — | — |
| 54 | KNOCK 2 SIGNAL | — | — | — | — | — | — | — | — |
| 55 | SERIAL 1 RX | — | — | — | — | — | — | — | — |
| 56 | ANA VOLT 2 | — | W26 | — | 0.5 | OEM-4-V | — | — | — |
| 57 | ANA TEMP 2 | — | W57 | — | 0.5 | OEM-4-R | — | — | — |
| 58 | INJECTOR 6 | — | W50 | — | 0.5 | OEM-2-R | — | — | — |
| 59 | COIL 5 | — | — | — | — | — | — | — | — |
| 6 | DIG_IN 1 | — | W60 | — | 0.5 | OEM-3-T | — | — | — |
| 60 | COIL 6 | — | — | — | — | — | — | — | — |
| 61 | GROUND | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 62 | DIG_IN 5 | — | W64 | — | 0.5 | OEM-4-F | — | — | — |
| 63 | INJECTOR 1 | — | W21 | — | 0.5 | OEM-2-A | — | — | — |
| 64 | VBAT | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 65 | H-BRIDGE A OUT 1 | — | — | — | — | — | — | — | — |
| 66 | H-BRIDGE A OUT 2 | — | — | — | — | — | — | — | — |
| 67 | Stepper 1 / A1 | — | — | — | — | — | — | — | — |
| 68 | Stepper 2 / A2 | — | — | — | — | — | — | — | — |
| 69 | LOW SIDE 5 | — | W32 | — | 0.5 | OEM-3-H | — | — | — |
| 7 | DIG_IN 2 | — | W61 | — | 0.5 | OEM-3-S | — | — | — |
| 70 | Stepper 3 / B1 | — | — | — | — | — | — | — | — |
| 71 | Stepper 4 / B2 | — | — | — | — | — | — | — | — |
| 72 | LOW SIDE RELAY 13 | — | W43 | — | 0.5 | OEM-3-P | — | — | — |
| 73 | LOW SIDE 1 | — | W28 | — | 0.5 | OEM-2-B | — | — | — |
| 74 | LOW SIDE 3 | — | W30 | — | 0.5 | OEM-2-K | — | — | — |
| 75 | LOW SIDE RELAY 16 | — | W47 | — | 0.5 | OEM-2-H | — | — | — |
| 76 | 5V REF | — | — | — | — | — | — | — | — |
| 77 | ANA TEMP 3 | — | W58 | — | 0.5 | OEM-4-N | — | — | — |
| 78 | ANA VOLT 6 | — | W59 | — | 0.5 | OEM-4-AD | — | — | — |
| 79 | TACHOMETER | — | W53 | — | 0.5 | OEM-3-O | — | — | — |
| 8 | DIG_IN 3 | — | W62 | — | 0.5 | OEM-4-B | — | — | — |
| 80 | CRANK VR+ | — | W16 | — | 0.5 | OEM-3-Y | — | — | — |
| 81 | CRANK VR- | — | — | — | — | — | — | — | — |
| 82 | CAM B VR+ | — | — | — | — | — | — | — | — |
| 83 | CAM B VR- | — | — | — | — | — | — | — | — |
| 84 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 86 | ANA TEMP 1 | — | W27 | — | 0.5 | OEM-4-P | — | — | — |
| 87 | ANA VOLT 5 | — | W56 | — | 0.5 | OEM-4-W | — | — | — |
| 88 | INJECTOR 7 | — | W51 | — | 0.5 | OEM-3-C | — | — | — |
| 89 | GROUND | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 9 | LOW SIDE RELAY 18 | — | W49 | — | 0.5 | OEM-2-N | — | — | — |
| 90 | GROUND | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Injector 1 | — | W21 | — | 0.5 | ME442-C1-63 | — | — | — |
| B | Cooling fan relay | — | W28 | — | 0.5 | ME442-C1-73 | — | — | — |
| C | Condenser fan relay | — | W29 | — | 0.5 | ME442-C1-12 | — | — | — |
| D | Injector 2 | — | W22 | — | 0.5 | ME442-C1-4 | — | — | — |
| E | EGR valve | — | W45 | — | 0.5 | ME442-C1-43 | — | — | — |
| F | EGR valve | — | W46 | — | 0.5 | ME442-C1-13 | — | — | — |
| G | Injector 3 | — | W23 | — | 0.5 | ME442-C1-33 | — | — | — |
| H | EGR valve | — | W47 | — | 0.5 | ME442-C1-75 | — | — | — |
| I | EGR valve | — | W48 | — | 0.5 | ME442-C1-40 | — | — | — |
| J | Injector 4 | — | W24 | — | 0.5 | ME442-C1-3 | — | — | — |
| K | A/C clutch relay | — | W30 | — | 0.5 | ME442-C1-74 | — | — | — |
| L | NC | — | — | — | — | — | — | — | — |
| M | Fuel pump relay | — | W31 | — | 0.5 | ME442-C1-44 | — | — | — |
| N | VTCS solenoid (intake butterflies) | — | W49 | — | 0.5 | ME442-C1-9 | — | — | — |
| O | Fuel pump relay (non-immobiliser) | — | W33 | — | 0.5 | ME442-C1-37 | — | — | — |
| P | ISC valve +14V feed | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| Q | ISC valve low side | — | W44 | — | 0.5 | ME442-C1-28 | — | — | — |
| R | Malfunction indicator lamp (MIL) | — | W50 | — | 0.5 | ME442-C1-58 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Purge solenoid valve | — | W51 | — | 0.5 | ME442-C1-88 | — | — | — |
| D | EGR boost solenoid | — | — | — | — | — | — | — | — |
| E | NC | — | — | — | — | — | — | — | — |
| F | Ignition 1 (coils 1+4, wasted spark) | — | W19 | — | 0.5 | ME442-C1-32 | — | — | — |
| G | NC | — | — | — | — | — | — | — | — |
| H | Main relay | — | W32 | — | 0.5 | ME442-C1-69 | — | — | — |
| I | Ignition 2 (coils 2+3, wasted spark) | — | W20 | — | 0.5 | ME442-C1-31 | — | — | — |
| J | Front O2 heater | — | W42 | — | 0.5 | ME442-C1-42 | — | — | — |
| K | EVAP leak detection pump | — | W52 | — | 0.5 | ME442-C1-27 | — | — | — |
| L | NC | — | — | — | — | — | — | — | — |
| M | Alternator control | — | — | — | — | — | — | — | — |
| N | NC | — | — | — | — | — | — | — | — |
| O | Tachometer output | — | W53 | — | 0.5 | ME442-C1-79 | — | — | — |
| P | Rear O2 heater | — | W43 | — | 0.5 | ME442-C1-72 | — | — | — |
| Q | Data link connector (K-line) | — | — | — | — | — | — | — | — |
| R | NC | — | — | — | — | — | — | — | — |
| S | Immobiliser | — | W61 | — | 0.5 | ME442-C1-7 | — | — | — |
| T | Vehicle speed | — | W60 | — | 0.5 | ME442-C1-6 | — | — | — |
| U | Charge lamp | — | — | — | — | — | — | — | — |
| V | Cam position (CMP) | — | W17 | — | 0.5 | ME442-C1-22 | — | — | — |
| W | NC | — | — | — | — | — | — | — | — |
| X | NC | — | — | — | — | — | — | — | — |
| Y | Crank position (CKP) | — | W16 | — | 0.5 | ME442-C1-80 | — | — | — |
| Z | NC | — | — | — | — | — | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| AA | Rear O2 signal | — | W55 | — | 0.5 | ME442-C1-18 | — | — | — |
| AB | NC | — | — | — | — | — | — | — | — |
| AC | Data link connector (DLC TEN, turbo) | — | — | — | — | — | — | — | — |
| AD | Fuel level | — | W59 | — | 0.5 | ME442-C1-78 | — | — | — |
| AE | BARO/MAP sensor (turbo boost pressure) | — | W54 | — | 0.5 | ME442-C1-17 | — | — | — |
| AF | ECU power +14V (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| AG | Constant +12V | — | — | — | — | — | — | — | — |
| AH | EVAP leak detection pump solenoid valve | — | — | — | — | — | — | — | — |
| B | Brake switch | — | W62 | — | 0.5 | ME442-C1-8 | — | — | — |
| C | Power steering pressure switch | — | W63 | — | 0.5 | ME442-C1-5 | — | — | — |
| D | Boost control solenoid (turbo) | — | W34 | — | 0.5 | RLY1-R-OUT | — | — | — |
| E | Boost control solenoid (turbo) | — | W38 | — | 0.5 | RLY2-R-OUT | — | — | — |
| F | A/C request | — | W64 | — | 0.5 | ME442-C1-62 | — | — | — |
| G | NC | — | — | — | — | — | — | — | — |
| H | Neutral switch | — | W65 | — | 0.5 | ME442-C1-34 | — | — | — |
| I | Clutch switch | — | W66 | — | 0.5 | ME442-C1-48 | — | — | — |
| J | VTCS vacuum switch | — | — | — | — | — | — | — | — |
| K | NC | — | — | — | — | — | — | — | — |
| L | +5V sensor supply | — | W15 | — | 0.5 | ME442-C1-45 | — | — | — |
| M | Knock sensor | — | W18 | — | 0.5 | ME442-C1-53 | — | — | — |
| N | Intake air temperature (IAT) | — | W58 | — | 0.5 | ME442-C1-77 | — | — | — |
| O | Signal ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Coolant temperature (ECT) | — | W27 | — | 0.5 | ME442-C1-86 | — | — | — |
| Q | NC | — | — | — | — | — | — | — | — |
| R | Intake air temperature 2 (IAT2, turbo) | — | W57 | — | 0.5 | ME442-C1-57 | — | — | — |
| S | Ignition switch (IG1) sense | — | — | — | — | — | — | — | — |
| T | Generator output voltage (terminal P) | — | — | — | — | — | — | — | — |
| U | NC | — | — | — | — | — | — | — | — |
| V | Throttle position (TPS) | — | W26 | — | 0.5 | ME442-C1-56 | — | — | — |
| W | Front O2 signal | — | W56 | — | 0.5 | ME442-C1-87 | — | — | — |
| X | Mass air flow (MAF) | — | W25 | — | 0.5 | ME442-C1-26 | — | — | — |
| Y | NC | — | — | — | — | — | — | — | — |
| Z | TCM (automatic only) | — | — | — | — | — | — | — | — |
RLY1-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (switched +12 V) | — | W36 | — | 0.5 | SP-14V-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W37 | — | 0.5 | ME442-C1-39 | — | — | — |
| IN | Relay contact input (switched +12 V) | — | W35 | — | 0.5 | SP-14V-1 | — | — | — |
| OUT | Relay contact output (switched +12 V to load) | — | W34 | — | 0.5 | OEM-4-D | — | — | — |
RLY2-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (switched +12 V) | — | W40 | — | 0.5 | SP-14V-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W41 | — | 0.5 | ME442-C1-16 | — | — | — |
| IN | Relay contact input (switched +12 V) | — | W39 | — | 0.5 | SP-14V-1 | — | — | — |
| OUT | Relay contact output (switched +12 V to load) | — | W38 | — | 0.5 | OEM-4-E | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W12 | — | 0.5 | OEM-4-O | — | — | — |
| 1 | — | — | W13 | — | 0.5 | ME442-C1-52 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | ME442-C1-84 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-2-P | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-4-AF | — | — | — |
| 1 | — | — | W3 | — | 0.85 | ME442-C1-15 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | ME442-C1-64 | — | — | — |
| 1 | — | — | W35 | — | 0.5 | RLY1-R-IN | — | — | — |
| 1 | — | — | W36 | — | 0.5 | RLY1-R-COIL+ | — | — | — |
| 1 | — | — | W39 | — | 0.5 | RLY2-R-IN | — | — | — |
| 1 | — | — | W40 | — | 0.5 | RLY2-R-COIL+ | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-4-A | — | — | — |
| 1 | — | — | W8 | — | 0.85 | ME442-C1-10 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | ME442-C1-61 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | ME442-C1-89 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | ME442-C1-90 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-2-A | Injector 1 | injector_out | ME442-C1-63 | INJECTOR 1 | injector_out | corroborated | |
| OEM-2-B | Cooling fan relay | low_side_out | ME442-C1-73 | LOW SIDE 1 | low_side_out | corroborated | |
| OEM-2-C | Condenser fan relay | low_side_out | ME442-C1-12 | LOW SIDE 2 | low_side_out | corroborated | |
| OEM-2-D | Injector 2 | injector_out | ME442-C1-4 | INJECTOR 2 | injector_out | corroborated | |
| OEM-2-E | EGR valve | low_side_out | ME442-C1-43 | LOW SIDE RELAY 14 | low_side_out | corroborated | |
| OEM-2-F | EGR valve | low_side_out | ME442-C1-13 | LOW SIDE RELAY 15 | low_side_out | corroborated | |
| OEM-2-G | Injector 3 | injector_out | ME442-C1-33 | INJECTOR 3 | injector_out | corroborated | |
| OEM-2-H | EGR valve | low_side_out | ME442-C1-75 | LOW SIDE RELAY 16 | low_side_out | corroborated | |
| OEM-2-I | EGR valve | low_side_out | ME442-C1-40 | LOW SIDE RELAY 17 | low_side_out | corroborated | |
| OEM-2-J | Injector 4 | injector_out | ME442-C1-3 | INJECTOR 4 | injector_out | corroborated | |
| OEM-2-K | A/C clutch relay | low_side_out | ME442-C1-74 | LOW SIDE 3 | low_side_out | corroborated | |
| OEM-2-L | NC | — | — | — | — | single_source | |
| OEM-2-M | Fuel pump relay | low_side_out | ME442-C1-44 | LOW SIDE 4 | low_side_out | corroborated | |
| OEM-2-N | VTCS solenoid (intake butterflies) | low_side_out | ME442-C1-9 | LOW SIDE RELAY 18 | low_side_out | corroborated | |
| OEM-2-O | Fuel pump relay (non-immobiliser) | low_side_out | ME442-C1-37 | LOW SIDE RELAY 11 | low_side_out | corroborated | |
| OEM-2-P | ISC valve +14V feed | power_in | ME442-C1-15 + ME442-C1-64 + RLY1-R-COIL+ + RLY1-R-IN + RLY2-R-COIL+ + RLY2-R-IN | IGN +12V + VBAT + Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) | power_in + power_out | corroborated | |
| OEM-2-Q | ISC valve low side | low_side_out | ME442-C1-28 | INJECTOR 5 | injector_out | corroborated | |
| OEM-2-R | Malfunction indicator lamp (MIL) | low_side_out | ME442-C1-58 | INJECTOR 6 | injector_out | corroborated | |
| OEM-3-A | Power ground | ground | ME442-C1-10 + ME442-C1-61 + ME442-C1-89 + ME442-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | corroborated | |
| OEM-3-B | Power ground | ground | ME442-C1-10 + ME442-C1-61 + ME442-C1-89 + ME442-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | corroborated | |
| OEM-3-C | Purge solenoid valve | low_side_out | ME442-C1-88 | INJECTOR 7 | injector_out | corroborated | |
| OEM-3-D | EGR boost solenoid | — | — | — | — | conflict | |
| OEM-3-E | NC | — | — | — | — | single_source | |
| OEM-3-F | Ignition 1 (coils 1+4, wasted spark) | ignition_out | ME442-C1-32 | COIL 1 | ignition_out | corroborated | |
| OEM-3-G | NC | — | — | — | — | single_source | |
| OEM-3-H | Main relay | low_side_out | ME442-C1-69 | LOW SIDE 5 | low_side_out | corroborated | |
| OEM-3-I | Ignition 2 (coils 2+3, wasted spark) | ignition_out | ME442-C1-31 | COIL 2 | ignition_out | corroborated | |
| OEM-3-J | Front O2 heater | low_side_out | ME442-C1-42 | LOW SIDE RELAY 12 | low_side_out | corroborated | |
| OEM-3-K | EVAP leak detection pump | low_side_out | ME442-C1-27 | INJECTOR 8 | injector_out | corroborated | |
| OEM-3-L | NC | — | — | — | — | single_source | |
| OEM-3-M | Alternator control | low_side_out | — | — | — | corroborated | |
| OEM-3-N | NC | — | — | — | — | single_source | |
| OEM-3-O | Tachometer output | tacho_out | ME442-C1-79 | TACHOMETER | tacho_out | corroborated | |
| OEM-3-P | Rear O2 heater | low_side_out | ME442-C1-72 | LOW SIDE RELAY 13 | low_side_out | corroborated | |
| OEM-3-Q | Data link connector (K-line) | serial | — | — | — | corroborated | |
| OEM-3-R | NC | — | — | — | — | single_source | |
| OEM-3-S | Immobiliser | digital_in | ME442-C1-7 | DIG_IN 2 | digital_in | corroborated | |
| OEM-3-T | Vehicle speed | digital_in | ME442-C1-6 | DIG_IN 1 | digital_in | corroborated | |
| OEM-3-U | Charge lamp | low_side_out | — | — | — | corroborated | |
| OEM-3-V | Cam position (CMP) | trigger_in | ME442-C1-22 | CAM A VR+ | trigger_in | corroborated | |
| OEM-3-W | NC | — | — | — | — | single_source | |
| OEM-3-X | NC | — | — | — | — | single_source | |
| OEM-3-Y | Crank position (CKP) | trigger_in | ME442-C1-80 | CRANK VR+ | trigger_in | corroborated | |
| OEM-3-Z | NC | — | — | — | — | single_source | |
| OEM-4-A | Power ground | ground | ME442-C1-10 + ME442-C1-61 + ME442-C1-89 + ME442-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | corroborated | |
| OEM-4-AA | Rear O2 signal | lambda_nb_in | ME442-C1-18 | ANA VOLT 4 | analog_in | corroborated | |
| OEM-4-AB | NC | — | — | — | — | single_source | |
| OEM-4-AC | Data link connector (DLC TEN, turbo) | serial | — | — | — | BrY | single_source |
| OEM-4-AD | Fuel level | analog_in | ME442-C1-78 | ANA VOLT 6 | analog_in | corroborated | |
| OEM-4-AE | BARO/MAP sensor (turbo boost pressure) | analog_in | ME442-C1-17 | ANA VOLT 3 | analog_in | LY | single_source |
| OEM-4-AF | ECU power +14V (main relay) | power_in | ME442-C1-15 + ME442-C1-64 + RLY1-R-COIL+ + RLY1-R-IN + RLY2-R-COIL+ + RLY2-R-IN | IGN +12V + VBAT + Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) | power_in + power_out | corroborated | |
| OEM-4-AG | Constant +12V | power_in | — | — | — | corroborated | |
| OEM-4-AH | EVAP leak detection pump solenoid valve | low_side_out | — | — | — | corroborated | |
| OEM-4-B | Brake switch | digital_in | ME442-C1-8 | DIG_IN 3 | digital_in | corroborated | |
| OEM-4-C | Power steering pressure switch | digital_in | ME442-C1-5 | DIG_IN 4 | digital_in | corroborated | |
| OEM-4-D | Boost control solenoid (turbo) | high_side_out | RLY1-R-OUT | Relay contact output (switched +12 V to load) | power_out | Y | single_source |
| OEM-4-E | Boost control solenoid (turbo) | high_side_out | RLY2-R-OUT | Relay contact output (switched +12 V to load) | power_out | Y | single_source |
| OEM-4-F | A/C request | digital_in | ME442-C1-62 | DIG_IN 5 | digital_in | corroborated | |
| OEM-4-G | NC | — | — | — | — | single_source | |
| OEM-4-H | Neutral switch | digital_in | ME442-C1-34 | DIG_IN 6 | digital_in | corroborated | |
| OEM-4-I | Clutch switch | digital_in | ME442-C1-48 | ANA VOLT 7 | analog_in | corroborated | |
| OEM-4-J | VTCS vacuum switch | digital_in | — | — | — | corroborated | |
| OEM-4-K | NC | — | — | — | — | single_source | |
| OEM-4-L | +5V sensor supply | vref | ME442-C1-45 | 5V REF | vref | corroborated | |
| OEM-4-M | Knock sensor | knock_in | ME442-C1-53 | KNOCK 1 SIGNAL | knock_in | corroborated | |
| OEM-4-N | Intake air temperature (IAT) | temp_in | ME442-C1-77 | ANA TEMP 3 | temp_in | corroborated | |
| OEM-4-O | Signal ground | sensor_ground | ME442-C1-52 + ME442-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | corroborated | |
| OEM-4-P | Coolant temperature (ECT) | temp_in | ME442-C1-86 | ANA TEMP 1 | temp_in | corroborated | |
| OEM-4-Q | NC | — | — | — | — | single_source | |
| OEM-4-R | Intake air temperature 2 (IAT2, turbo) | temp_in | ME442-C1-57 | ANA TEMP 2 | temp_in | VY | single_source |
| OEM-4-S | Ignition switch (IG1) sense | digital_in | — | — | — | corroborated | |
| OEM-4-T | Generator output voltage (terminal P) | — | — | — | — | corroborated | |
| OEM-4-U | NC | — | — | — | — | single_source | |
| OEM-4-V | Throttle position (TPS) | analog_in | ME442-C1-56 | ANA VOLT 2 | analog_in | corroborated | |
| OEM-4-W | Front O2 signal | lambda_nb_in | ME442-C1-87 | ANA VOLT 5 | analog_in | corroborated | |
| OEM-4-X | Mass air flow (MAF) | analog_in | ME442-C1-26 | ANA VOLT 1 | analog_in | corroborated | |
| OEM-4-Y | NC | — | — | — | — | single_source | |
| OEM-4-Z | TCM (automatic only) | — | — | — | — | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W3 | SP-14V-1 | ME442-C1-15 | 0.85 | no route | IGN +12V | — | |
| W4 | SP-14V-1 | ME442-C1-64 | 0.85 | no route | VBAT | — | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-4-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | SP-GND-1 | ME442-C1-10 | 0.85 | no route | GROUND CHASSIS | — | |
| W9 | SP-GND-1 | ME442-C1-61 | 0.85 | no route | GROUND | — | |
| W10 | SP-GND-1 | ME442-C1-89 | 0.85 | no route | GROUND | — | |
| W11 | SP-GND-1 | ME442-C1-90 | 0.85 | no route | GROUND | — | |
| W12 | OEM-4-O | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W13 | SP-0V-1 | ME442-C1-52 | 0.5 | no route | SENSORS GROUND | — | |
| W14 | SP-0V-1 | ME442-C1-84 | 0.5 | no route | Sensor Ground | — | |
| W15 | OEM-4-L | ME442-C1-45 | 0.5 | no route | +5V sensor supply | — | |
| W16 | OEM-3-Y | ME442-C1-80 | 0.5 | no route | Crank position (CKP) | — | |
| W17 | OEM-3-V | ME442-C1-22 | 0.5 | no route | Cam position (CMP) | — | |
| W18 | OEM-4-M | ME442-C1-53 | 0.5 | no route | Knock sensor | — | |
| W19 | OEM-3-F | ME442-C1-32 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W20 | OEM-3-I | ME442-C1-31 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W21 | OEM-2-A | ME442-C1-63 | 0.5 | no route | Injector 1 | — | |
| W22 | OEM-2-D | ME442-C1-4 | 0.5 | no route | Injector 2 | — | |
| W23 | OEM-2-G | ME442-C1-33 | 0.5 | no route | Injector 3 | — | |
| W24 | OEM-2-J | ME442-C1-3 | 0.5 | no route | Injector 4 | — | |
| W25 | OEM-4-X | ME442-C1-26 | 0.5 | no route | Mass air flow (MAF) | — | |
| W26 | OEM-4-V | ME442-C1-56 | 0.5 | no route | Throttle position (TPS) | — | |
| W27 | OEM-4-P | ME442-C1-86 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W28 | OEM-2-B | ME442-C1-73 | 0.5 | no route | Cooling fan relay | — | |
| W29 | OEM-2-C | ME442-C1-12 | 0.5 | no route | Condenser fan relay | — | |
| W30 | OEM-2-K | ME442-C1-74 | 0.5 | no route | A/C clutch relay | — | |
| W31 | OEM-2-M | ME442-C1-44 | 0.5 | no route | Fuel pump relay | — | |
| W32 | OEM-3-H | ME442-C1-69 | 0.5 | no route | Main relay | — | |
| W33 | OEM-2-O | ME442-C1-37 | 0.5 | no route | Fuel pump relay (non-immobiliser) | — | |
| W34 | OEM-4-D | RLY1-R-OUT | 0.5 | no route | Boost control solenoid (turbo) | — | |
| W35 | SP-14V-1 | RLY1-R-IN | 0.5 | no route | Relay contact input (switched +12 V) | — | |
| W36 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | no route | Relay coil positive (switched +12 V) | — | |
| W37 | RLY1-R-COIL- | ME442-C1-39 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W38 | OEM-4-E | RLY2-R-OUT | 0.5 | no route | Boost control solenoid (turbo) | — | |
| W39 | SP-14V-1 | RLY2-R-IN | 0.5 | no route | Relay contact input (switched +12 V) | — | |
| W40 | SP-14V-1 | RLY2-R-COIL+ | 0.5 | no route | Relay coil positive (switched +12 V) | — | |
| W41 | RLY2-R-COIL- | ME442-C1-16 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W42 | OEM-3-J | ME442-C1-42 | 0.5 | no route | Front O2 heater | — | |
| W43 | OEM-3-P | ME442-C1-72 | 0.5 | no route | Rear O2 heater | — | |
| W44 | OEM-2-Q | ME442-C1-28 | 0.5 | no route | ISC valve low side | — | |
| W45 | OEM-2-E | ME442-C1-43 | 0.5 | no route | EGR valve | — | |
| W46 | OEM-2-F | ME442-C1-13 | 0.5 | no route | EGR valve | — | |
| W47 | OEM-2-H | ME442-C1-75 | 0.5 | no route | EGR valve | — | |
| W48 | OEM-2-I | ME442-C1-40 | 0.5 | no route | EGR valve | — | |
| W49 | OEM-2-N | ME442-C1-9 | 0.5 | no route | VTCS solenoid (intake butterflies) | — | |
| W50 | OEM-2-R | ME442-C1-58 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W51 | OEM-3-C | ME442-C1-88 | 0.5 | no route | Purge solenoid valve | — | |
| W52 | OEM-3-K | ME442-C1-27 | 0.5 | no route | EVAP leak detection pump | — | |
| W53 | OEM-3-O | ME442-C1-79 | 0.5 | no route | Tachometer output | — | |
| W54 | OEM-4-AE | ME442-C1-17 | 0.5 | no route | BARO/MAP sensor (turbo boost pressure) | — | |
| W55 | OEM-4-AA | ME442-C1-18 | 0.5 | no route | Rear O2 signal | — | |
| W56 | OEM-4-W | ME442-C1-87 | 0.5 | no route | Front O2 signal | — | |
| W57 | OEM-4-R | ME442-C1-57 | 0.5 | no route | Intake air temperature 2 (IAT2, turbo) | — | |
| W58 | OEM-4-N | ME442-C1-77 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W59 | OEM-4-AD | ME442-C1-78 | 0.5 | no route | Fuel level | — | |
| W60 | OEM-3-T | ME442-C1-6 | 0.5 | no route | Vehicle speed | — | |
| W61 | OEM-3-S | ME442-C1-7 | 0.5 | no route | Immobiliser | — | |
| W62 | OEM-4-B | ME442-C1-8 | 0.5 | no route | Brake switch | — | |
| W63 | OEM-4-C | ME442-C1-5 | 0.5 | no route | Power steering pressure switch | — | |
| W64 | OEM-4-F | ME442-C1-62 | 0.5 | no route | A/C request | — | |
| W65 | OEM-4-H | ME442-C1-34 | 0.5 | no route | Neutral switch | — | |
| W66 | OEM-4-I | ME442-C1-48 | 0.5 | no route | Clutch switch | — |
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 (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-4-I ↔ ME442-C1-48 | OEM-4-I "Clutch switch" [digital_in] is wired to ME442-C1-48 "ANA VOLT 7" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| info | NET_FAMILY | OEM-2-Q ↔ ME442-C1-28 | OEM-2-Q "ISC valve low side" [low_side_out] is wired to ME442-C1-28 "INJECTOR 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-R ↔ ME442-C1-58 | OEM-2-R "Malfunction indicator lamp (MIL)" [low_side_out] is wired to ME442-C1-58 "INJECTOR 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-C ↔ ME442-C1-88 | OEM-3-C "Purge solenoid valve" [low_side_out] is wired to ME442-C1-88 "INJECTOR 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-K ↔ ME442-C1-27 | OEM-3-K "EVAP leak detection pump" [low_side_out] is wired to ME442-C1-27 "INJECTOR 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 10 optional OEM pins are not mapped: OEM-3-D EGR boost solenoid; OEM-3-M Alternator control; OEM-3-Q Data link connector (K-line); OEM-3-U Charge lamp; OEM-4-AC Data link connector (DLC TEN, turbo); OEM-4-AH EVAP leak detection pump solenoid valve; OEM-4-J VTCS vacuum switch; OEM-4-S Ignition switch (IG1) sense; OEM-4-T Generator output voltage (terminal P); OEM-4-Z TCM (automatic only) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-4-AG | 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: unconfirmed. Confirm these before building: - Trigger pattern for Mazda BP-ZET not found in the ECU's docs (Trigger-pattern list is only inside MEITE software, not published online) Auto-mapped by auto_map() from the library pin data on 2026-10-17. Review every wire against both manuals before building. Not wired: - OEM-4 AG: Constant +12V: Motorsport Electronics ME442 has no battery-constant input; not needed - OEM-4 S: Ignition switch (IG1) sense: key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); Motorsport Electronics ME442 has no dedicated key-on input - OEM-3 M: Alternator control: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME442 - OEM-3 U: Charge lamp: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME442 - OEM-4 AH: EVAP leak detection pump solenoid valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on Motorsport Electronics ME442 - OEM-4 J: VTCS vacuum switch: no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME442 - OEM-3 Q: Data link connector (K-line): no free k_line on Motorsport Electronics ME442 - OEM-4 AC: Data link connector (DLC TEN, turbo): no free k_line on Motorsport Electronics ME442 - OEM-3 D: EGR boost solenoid: not classified in the library; wire by hand - OEM-4 T: Generator output voltage (terminal P): not classified in the library; wire by hand - OEM-4 Z: TCM (automatic only): not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | oem_manual | 2005 Mazda MX-5 Miata Engine Performance Control System (PCM terminal voltage reference, BP and BP WITH TC) | https://trull.org/alex/pubmirror/www.mellens.net/mazda/Mazda-Miata-2005/engine_control_system.pdf | — | — | — |
| 4 | vendor_doc | Adaptronic eSel039 Select Plugin ECU for Mazda MX5 / Miata NB8B/C (OEM ECU pinout) | https://www.miataturbo.net/attachments/ecus-tuning-54/04-msm-ecu-pinout-104032/nb8bc_oem_ecu_pinouts-224948d1602912806 | — | — | — |
| 4 | vendor_doc | Bosch relay catalogue (mini ISO relays) | https://www.bosch-ibusiness.com/media/downloads/kataloge/relay/2025_10_bosch_relay_catalogue.pdf | archive | 2026-10-05 | 20344cff1ef3 |
| 4 | community_copy | Honda S2000 Service Manual 2000–2008, Fuel and Emissions Systems | https://www.s2000.wiki/view/images/7/7f/Service_Manual_2000-2008.pdf | archive | 2026-10-05 | a470cfc928e9 |
| 4 | vendor_doc | Link G4X MX5NB2X install manual (NB2 2001-05) | https://linkecu.com/documentation/MX5XNB2.pdf | archive | 2026-10-05 | 741efdd9f2c8 |
| 4 | vendor_doc | Motorsport Electronics GEN2 ME221/ME360/ME442 wire-in pinout | https://motorsport-electronics.co.uk/onlinehelp/html/ME442ME360ME221GEN2Wire-InPinout.html | — | — | — |
| 4 | vendor_doc | Omron G8V-RH-1C7T-R-DC12 high-current micro 280 automotive relay datasheet | https://www.alldatasheet.com/datasheet-pdf/pdf/333797/OMRON/G8V-RH-1C7T-R-DC12.html | — | 2026-10-05 | 764a0505a941 |