VW Corrado VR6 12v (AAA) Motronic M2.9 OBD1 → rusEFI Proteus (auto)
VW Corrado VR6 12v (AAA) Motronic M2.9 OBD1 — rusEFI — Proteus
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
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 | 57 wires · 7 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-A-23 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | PROTEUS-Black23-23 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-A-1 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-10 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-55 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-56 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-A-7 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | PROTEUS-Black23-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | PROTEUS-Black23-19 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | PROTEUS-Black23-20 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | PROTEUS-Black35-17 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | PROTEUS-Black35-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | PROTEUS-Black35-24 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-A-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-33 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A-67 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | PROTEUS-White35-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | PROTEUS-White35-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | PROTEUS-White35-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | PROTEUS-White35-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | PROTEUS-White35-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | SP-0V-1 | PROTEUS-White35-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-0V-1 | PROTEUS-White35-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | SP-0V-1 | PROTEUS-White35-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | SP-0V-1 | PROTEUS-White35-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | SP-0V-1 | PROTEUS-White35-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-41 | PROTEUS-White35-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-68 | PROTEUS-Black23-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | SP-0V-1 | PROTEUS-Black23-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-44 | PROTEUS-Black23-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-34 | PROTEUS-White35-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-8 | PROTEUS-Black35-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-60 | PROTEUS-Black35-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-52 | PROTEUS-Black35-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-24 | PROTEUS-Black35-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-3 | PROTEUS-Black35-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-26 | PROTEUS-Black35-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-4 | PROTEUS-Black35-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-25 | PROTEUS-Black35-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-2 | PROTEUS-Black35-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-38 | PROTEUS-Black23-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-17 | PROTEUS-White35-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-40 | PROTEUS-White35-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-14 | PROTEUS-White35-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-49 | PROTEUS-Black35-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-6 | PROTEUS-Black35-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-9 | PROTEUS-Black35-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-27 | PROTEUS-Black35-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-31 | PROTEUS-Black35-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A-5 | PROTEUS-Black35-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-53 | PROTEUS-Black35-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-20 | PROTEUS-White35-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A-15 | PROTEUS-White35-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-A-36 | PROTEUS-White35-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-A-65 | PROTEUS-Black23-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-37 | PROTEUS-Black23-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-A-39 | PROTEUS-Black23-3 | 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 | PROTEUS-Black23-13 | PROTEUS-Black23-23 | open (OL) | sensor ground must not touch +12 V supply | |
| 2 | PROTEUS-Black23-13 | PROTEUS-White35-10 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | PROTEUS-Black23-14 | PROTEUS-Black23-23 | open (OL) | power ground must not touch +12 V supply | |
| 4 | PROTEUS-Black23-14 | PROTEUS-White35-10 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | PROTEUS-Black23-23 | PROTEUS-White35-10 | 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
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ground (E-1) | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Ground (OBD1 EGR enable) | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Coolant temperature (CLT) | — | W44 | — | 0.5 | PROTEUS-White35-20 | — | — | — |
| 15 | EGR temperature sensor | — | W53 | — | 0.5 | PROTEUS-White35-19 | — | — | — |
| 16 | MAF ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 17 | MAF signal | — | W42 | — | 0.5 | PROTEUS-White35-13 | — | — | — |
| 2 | Injector 6 (cyl 6) | — | W40 | — | 0.5 | PROTEUS-Black35-6 | — | — | — |
| 20 | O2 sensor 1 (primary) | — | W52 | — | 0.5 | PROTEUS-White35-14 | — | — | — |
| 21 | Diagnostic L-line | — | — | — | — | — | — | — | — |
| 22 | Tachometer output | — | — | — | — | — | — | — | — |
| 23 | ECU main power (from engine-electronics relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Injector 1 (cyl 1) | — | W35 | — | 0.5 | PROTEUS-Black35-3 | — | — | — |
| 25 | Injector 5 (cyl 5) | — | W39 | — | 0.5 | PROTEUS-Black35-5 | — | — | — |
| 26 | Injector 3 (cyl 3) | — | W37 | — | 0.5 | PROTEUS-Black35-4 | — | — | — |
| 27 | Idle air control valve | — | W48 | — | 0.5 | PROTEUS-Black35-10 | — | — | — |
| 3 | Injector 2 (cyl 2) | — | W36 | — | 0.5 | PROTEUS-Black35-15 | — | — | — |
| 31 | EVAP canister purge valve | — | W49 | — | 0.5 | PROTEUS-Black35-11 | — | — | — |
| 33 | Sensor ground bus | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Knock sensor 1 | — | W31 | — | 0.5 | PROTEUS-White35-34 | — | — | — |
| 36 | Intake air temperature (IAT) | — | W54 | — | 0.5 | PROTEUS-White35-30 | — | — | — |
| 37 | A/C compressor switch | — | W56 | — | 0.5 | PROTEUS-Black23-10 | — | — | — |
| 38 | Ignition switch (run/start) | — | W41 | — | 0.5 | PROTEUS-Black23-18 | — | — | — |
| 39 | A/C switch (cabin) | — | W57 | — | 0.5 | PROTEUS-Black23-3 | — | — | — |
| 4 | Injector 4 (cyl 4) | — | W38 | — | 0.5 | PROTEUS-Black35-16 | — | — | — |
| 40 | Throttle position sensor 1 | — | W43 | — | 0.5 | PROTEUS-White35-24 | — | — | — |
| 41 | TPS power (+5V) | — | W27 | — | 0.5 | PROTEUS-White35-10 | — | — | — |
| 43 | Diagnostic K-line | — | — | — | — | — | — | — | — |
| 44 | Camshaft position sensor (G40) | — | W30 | — | 0.5 | PROTEUS-Black23-1 | — | — | — |
| 49 | Secondary air injection relay control | — | W45 | — | 0.5 | PROTEUS-Black35-20 | — | — | — |
| 5 | Check engine light (MIL) | — | W50 | — | 0.5 | PROTEUS-Black35-12 | — | — | — |
| 51 | MFA fuel-consumption signal | — | — | — | — | — | — | — | — |
| 52 | Ignition coil 4 (coil pack pin 4) | — | W34 | — | 0.5 | PROTEUS-Black35-22 | — | — | — |
| 53 | Idle air control valve (2nd) | — | W51 | — | 0.5 | PROTEUS-Black35-23 | — | — | — |
| 54 | Battery constant (+12V) | — | — | — | — | — | — | — | — |
| 55 | Ground (E-3) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 56 | Ground (E-4) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 59 | Mass airflow sensor (5th terminal) | — | — | — | — | — | — | — | — |
| 6 | Fuel pump relay control | — | W46 | — | 0.5 | PROTEUS-Black35-9 | — | — | — |
| 60 | Ignition coil 3 (coil pack pin 3) | — | W33 | — | 0.5 | PROTEUS-Black35-34 | — | — | — |
| 65 | Vehicle speed sensor (VSS) | — | W55 | — | 0.5 | PROTEUS-Black23-2 | — | — | — |
| 67 | Crank sensor return (VR-) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 68 | Crank position sensor (G28, VR+) | — | W28 | — | 0.5 | PROTEUS-Black23-5 | — | — | — |
| 7 | Ground (E-2) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Ignition coil 2 (coil pack pin 2) | — | W32 | — | 0.5 | PROTEUS-Black35-35 | — | — | — |
| 9 | Engine electronics relay control | — | W47 | — | 0.5 | PROTEUS-Black35-21 | — | — | — |
PROTEUS-Black23
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Digital 2 | — | W30 | — | 0.5 | OEM-A-44 | — | — | — |
| 10 | Digital 1 | — | W56 | — | 0.5 | OEM-A-37 | — | — | — |
| 11 | Digital 6 | — | — | — | — | — | — | — | — |
| 12 | VR 2 negative | — | — | — | — | — | — | — | — |
| 13 | VR 1 negative | — | W29 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | ETB 2 positive | — | — | — | — | — | — | — | — |
| 16 | CAN 1 Low | — | — | — | — | — | — | — | — |
| 17 | CAN 1 High | — | — | — | — | — | — | — | — |
| 18 | Ignition switch in | — | W41 | — | 0.5 | OEM-A-38 | — | — | — |
| 19 | Power ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Digital 3 | — | W55 | — | 0.5 | OEM-A-65 | — | — | — |
| 20 | Power ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | CAN 2 Low | — | — | — | — | — | — | — | — |
| 22 | CAN 2 High | — | — | — | — | — | — | — | — |
| 23 | Main relay feed | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | Digital 4 | — | W57 | — | 0.5 | OEM-A-39 | — | — | — |
| 4 | VR 2 positive | — | — | — | — | — | — | — | — |
| 5 | VR 1 positive | — | W28 | — | 0.5 | OEM-A-68 | — | — | — |
| 6 | ETB 1 negative | — | — | — | — | — | — | — | — |
| 7 | ETB 1 positive | — | — | — | — | — | — | — | — |
| 8 | ETB 2 negative | — | — | — | — | — | — | — | — |
| 9 | Digital 5 | — | — | — | — | — | — | — | — |
PROTEUS-Black35
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Highside 2 | — | — | — | — | — | — | — | — |
| 10 | Lowside 13 | — | W48 | — | 0.5 | OEM-A-27 | — | — | — |
| 11 | Lowside 14 | — | W49 | — | 0.5 | OEM-A-31 | — | — | — |
| 12 | Lowside 15 | — | W50 | — | 0.5 | OEM-A-5 | — | — | — |
| 13 | Highside 3 | — | — | — | — | — | — | — | — |
| 14 | Highside 4 | — | — | — | — | — | — | — | — |
| 15 | Injector 2 | — | W36 | — | 0.5 | OEM-A-3 | — | — | — |
| 16 | Injector 4 | — | W38 | — | 0.5 | OEM-A-4 | — | — | — |
| 17 | Power ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Power ground | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 19 | Injector 8 | — | — | — | — | — | — | — | — |
| 2 | Highside 1 | — | — | — | — | — | — | — | — |
| 20 | Lowside 10 | — | W45 | — | 0.5 | OEM-A-49 | — | — | — |
| 21 | Lowside 12 | — | W47 | — | 0.5 | OEM-A-9 | — | — | — |
| 22 | Ignition 3 | — | W34 | — | 0.5 | OEM-A-52 | — | — | — |
| 23 | Lowside 16 | — | W51 | — | 0.5 | OEM-A-53 | — | — | — |
| 24 | Power ground | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 25 | Ignition 12 | — | — | — | — | — | — | — | — |
| 26 | Ignition 11 | — | — | — | — | — | — | — | — |
| 27 | Ignition 10 | — | — | — | — | — | — | — | — |
| 28 | Ignition 9 | — | — | — | — | — | — | — | — |
| 29 | Ignition 8 | — | — | — | — | — | — | — | — |
| 3 | Injector 1 | — | W35 | — | 0.5 | OEM-A-24 | — | — | — |
| 30 | Ignition 7 | — | — | — | — | — | — | — | — |
| 31 | Ignition 6 | — | — | — | — | — | — | — | — |
| 32 | Ignition 5 | — | — | — | — | — | — | — | — |
| 33 | Ignition 4 | — | — | — | — | — | — | — | — |
| 34 | Ignition 2 | — | W33 | — | 0.5 | OEM-A-60 | — | — | — |
| 35 | Ignition 1 | — | W32 | — | 0.5 | OEM-A-8 | — | — | — |
| 4 | Injector 3 | — | W37 | — | 0.5 | OEM-A-26 | — | — | — |
| 5 | Injector 5 | — | W39 | — | 0.5 | OEM-A-25 | — | — | — |
| 6 | Injector 6 | — | W40 | — | 0.5 | OEM-A-2 | — | — | — |
| 7 | Injector 7 | — | — | — | — | — | — | — | — |
| 8 | Injector 9 | — | — | — | — | — | — | — | — |
| 9 | Lowside 11 | — | W46 | — | 0.5 | OEM-A-6 | — | — | — |
PROTEUS-White35
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sensor ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 10 | 5V supply #2 | — | W27 | — | 0.5 | OEM-A-41 | — | — | — |
| 11 | 12V sensor supply | — | — | — | — | — | — | — | — |
| 12 | 12V sensor supply | — | — | — | — | — | — | — | — |
| 13 | Analog Volt 1 | — | W42 | — | 0.5 | OEM-A-17 | — | — | — |
| 14 | Analog Volt 3 | — | W52 | — | 0.5 | OEM-A-20 | — | — | — |
| 15 | Analog Volt 5 | — | — | — | — | — | — | — | — |
| 16 | Analog Volt 7 | — | — | — | — | — | — | — | — |
| 17 | Analog Volt 9 | — | — | — | — | — | — | — | — |
| 18 | Analog Volt 11 | — | — | — | — | — | — | — | — |
| 19 | Thermistor 1 | — | W53 | — | 0.5 | OEM-A-15 | — | — | — |
| 2 | Sensor ground | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | Coolant temp (CLT) | — | W44 | — | 0.5 | OEM-A-14 | — | — | — |
| 21 | 5V supply #1 | — | — | — | — | — | — | — | — |
| 22 | 5V supply #2 | — | — | — | — | — | — | — | — |
| 23 | Sensor ground | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | Analog Volt 2 | — | W43 | — | 0.5 | OEM-A-40 | — | — | — |
| 25 | Analog Volt 4 | — | — | — | — | — | — | — | — |
| 26 | Analog Volt 6 | — | — | — | — | — | — | — | — |
| 27 | Analog Volt 8 | — | — | — | — | — | — | — | — |
| 28 | Analog Volt 10 | — | — | — | — | — | — | — | — |
| 29 | Sensor ground | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Sensor ground | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 30 | Intake air temp (IAT) | — | W54 | — | 0.5 | OEM-A-36 | — | — | — |
| 31 | Thermistor 4 | — | — | — | — | — | — | — | — |
| 32 | 5V supply #1 | — | — | — | — | — | — | — | — |
| 33 | 5V supply #2 | — | — | — | — | — | — | — | — |
| 34 | Knock 1 | — | W31 | — | 0.5 | OEM-A-34 | — | — | — |
| 35 | Knock 2 | — | — | — | — | — | — | — | — |
| 4 | Sensor ground | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Sensor ground | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 6 | Sensor ground | — | W24 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | Sensor ground | — | W25 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Sensor ground | — | W26 | — | 0.5 | SP-0V-1 | — | — | — |
| 9 | 5V supply #1 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W14 | — | 0.5 | OEM-A-16 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-A-33 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-A-67 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | PROTEUS-White35-1 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | PROTEUS-White35-2 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | PROTEUS-White35-23 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | PROTEUS-White35-29 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | PROTEUS-White35-3 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | PROTEUS-White35-4 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | PROTEUS-White35-5 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | PROTEUS-White35-6 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | PROTEUS-White35-7 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | PROTEUS-White35-8 | — | — | — |
| 1 | — | — | W29 | — | 0.5 | PROTEUS-Black23-13 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | PROTEUS-Black23-23 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.85 | OEM-A-1 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-A-10 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-A-55 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-56 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-A-7 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | PROTEUS-Black23-14 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | PROTEUS-Black23-19 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | PROTEUS-Black23-20 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | PROTEUS-Black35-17 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | PROTEUS-Black35-18 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | PROTEUS-Black35-24 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Ground (E-1) | ground | PROTEUS-Black23-14 + PROTEUS-Black23-19 + PROTEUS-Black23-20 + PROTEUS-Black35-17 + PROTEUS-Black35-18 + PROTEUS-Black35-24 | Power ground + Power ground + Power ground + Power ground + Power ground + Power ground | ground | single_source | |
| OEM-A-10 | Ground (OBD1 EGR enable) | ground | PROTEUS-Black23-14 + PROTEUS-Black23-19 + PROTEUS-Black23-20 + PROTEUS-Black35-17 + PROTEUS-Black35-18 + PROTEUS-Black35-24 | Power ground + Power ground + Power ground + Power ground + Power ground + Power ground | ground | single_source | |
| OEM-A-14 | Coolant temperature (CLT) | temp_in | PROTEUS-White35-20 | Coolant temp (CLT) | temp_in | single_source | |
| OEM-A-15 | EGR temperature sensor | temp_in | PROTEUS-White35-19 | Thermistor 1 | temp_in | single_source | |
| OEM-A-16 | MAF ground | sensor_ground | PROTEUS-Black23-13 + PROTEUS-White35-1 + PROTEUS-White35-2 + PROTEUS-White35-23 + PROTEUS-White35-29 + PROTEUS-White35-3 + PROTEUS-White35-4 + PROTEUS-White35-5 + PROTEUS-White35-6 + PROTEUS-White35-7 + PROTEUS-White35-8 | VR 1 negative + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground | sensor_ground + trigger_in | single_source | |
| OEM-A-17 | MAF signal | analog_in | PROTEUS-White35-13 | Analog Volt 1 | analog_in | single_source | |
| OEM-A-2 | Injector 6 (cyl 6) | injector_out | PROTEUS-Black35-6 | Injector 6 | injector_out | single_source | |
| OEM-A-20 | O2 sensor 1 (primary) | lambda_nb_in | PROTEUS-White35-14 | Analog Volt 3 | analog_in | single_source | |
| OEM-A-21 | Diagnostic L-line | serial | — | — | — | single_source | |
| OEM-A-22 | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-A-23 | ECU main power (from engine-electronics relay) | power_in | PROTEUS-Black23-23 | Main relay feed | power_in | single_source | |
| OEM-A-24 | Injector 1 (cyl 1) | injector_out | PROTEUS-Black35-3 | Injector 1 | injector_out | single_source | |
| OEM-A-25 | Injector 5 (cyl 5) | injector_out | PROTEUS-Black35-5 | Injector 5 | injector_out | single_source | |
| OEM-A-26 | Injector 3 (cyl 3) | injector_out | PROTEUS-Black35-4 | Injector 3 | injector_out | single_source | |
| OEM-A-27 | Idle air control valve | low_side_out | PROTEUS-Black35-10 | Lowside 13 | low_side_out | single_source | |
| OEM-A-3 | Injector 2 (cyl 2) | injector_out | PROTEUS-Black35-15 | Injector 2 | injector_out | single_source | |
| OEM-A-31 | EVAP canister purge valve | low_side_out | PROTEUS-Black35-11 | Lowside 14 | low_side_out | single_source | |
| OEM-A-33 | Sensor ground bus | sensor_ground | PROTEUS-Black23-13 + PROTEUS-White35-1 + PROTEUS-White35-2 + PROTEUS-White35-23 + PROTEUS-White35-29 + PROTEUS-White35-3 + PROTEUS-White35-4 + PROTEUS-White35-5 + PROTEUS-White35-6 + PROTEUS-White35-7 + PROTEUS-White35-8 | VR 1 negative + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground | sensor_ground + trigger_in | single_source | |
| OEM-A-34 | Knock sensor 1 | knock_in | PROTEUS-White35-34 | Knock 1 | knock_in | single_source | |
| OEM-A-36 | Intake air temperature (IAT) | temp_in | PROTEUS-White35-30 | Intake air temp (IAT) | temp_in | single_source | |
| OEM-A-37 | A/C compressor switch | digital_in | PROTEUS-Black23-10 | Digital 1 | digital_in | single_source | |
| OEM-A-38 | Ignition switch (run/start) | digital_in | PROTEUS-Black23-18 | Ignition switch in | digital_in | single_source | |
| OEM-A-39 | A/C switch (cabin) | digital_in | PROTEUS-Black23-3 | Digital 4 | digital_in | single_source | |
| OEM-A-4 | Injector 4 (cyl 4) | injector_out | PROTEUS-Black35-16 | Injector 4 | injector_out | single_source | |
| OEM-A-40 | Throttle position sensor 1 | analog_in | PROTEUS-White35-24 | Analog Volt 2 | analog_in | single_source | |
| OEM-A-41 | TPS power (+5V) | vref | PROTEUS-White35-10 | 5V supply #2 | vref | single_source | |
| OEM-A-43 | Diagnostic K-line | serial | — | — | — | single_source | |
| OEM-A-44 | Camshaft position sensor (G40) | trigger_in | PROTEUS-Black23-1 | Digital 2 | trigger_in | single_source | |
| OEM-A-49 | Secondary air injection relay control | low_side_out | PROTEUS-Black35-20 | Lowside 10 | low_side_out | single_source | |
| OEM-A-5 | Check engine light (MIL) | low_side_out | PROTEUS-Black35-12 | Lowside 15 | low_side_out | single_source | |
| OEM-A-51 | MFA fuel-consumption signal | tacho_out | — | — | — | single_source | |
| OEM-A-52 | Ignition coil 4 (coil pack pin 4) | ignition_out | PROTEUS-Black35-22 | Ignition 3 | ignition_out | single_source | |
| OEM-A-53 | Idle air control valve (2nd) | low_side_out | PROTEUS-Black35-23 | Lowside 16 | low_side_out | single_source | |
| OEM-A-54 | Battery constant (+12V) | power_in | — | — | — | single_source | |
| OEM-A-55 | Ground (E-3) | ground | PROTEUS-Black23-14 + PROTEUS-Black23-19 + PROTEUS-Black23-20 + PROTEUS-Black35-17 + PROTEUS-Black35-18 + PROTEUS-Black35-24 | Power ground + Power ground + Power ground + Power ground + Power ground + Power ground | ground | single_source | |
| OEM-A-56 | Ground (E-4) | ground | PROTEUS-Black23-14 + PROTEUS-Black23-19 + PROTEUS-Black23-20 + PROTEUS-Black35-17 + PROTEUS-Black35-18 + PROTEUS-Black35-24 | Power ground + Power ground + Power ground + Power ground + Power ground + Power ground | ground | single_source | |
| OEM-A-59 | Mass airflow sensor (5th terminal) | sensor_out | — | — | — | single_source | |
| OEM-A-6 | Fuel pump relay control | low_side_out | PROTEUS-Black35-9 | Lowside 11 | low_side_out | single_source | |
| OEM-A-60 | Ignition coil 3 (coil pack pin 3) | ignition_out | PROTEUS-Black35-34 | Ignition 2 | ignition_out | single_source | |
| OEM-A-65 | Vehicle speed sensor (VSS) | digital_in | PROTEUS-Black23-2 | Digital 3 | digital_in | single_source | |
| OEM-A-67 | Crank sensor return (VR-) | sensor_ground | PROTEUS-Black23-13 + PROTEUS-White35-1 + PROTEUS-White35-2 + PROTEUS-White35-23 + PROTEUS-White35-29 + PROTEUS-White35-3 + PROTEUS-White35-4 + PROTEUS-White35-5 + PROTEUS-White35-6 + PROTEUS-White35-7 + PROTEUS-White35-8 | VR 1 negative + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground + Sensor ground | sensor_ground + trigger_in | single_source | |
| OEM-A-68 | Crank position sensor (G28, VR+) | trigger_in | PROTEUS-Black23-5 | VR 1 positive | trigger_in | single_source | |
| OEM-A-7 | Ground (E-2) | ground | PROTEUS-Black23-14 + PROTEUS-Black23-19 + PROTEUS-Black23-20 + PROTEUS-Black35-17 + PROTEUS-Black35-18 + PROTEUS-Black35-24 | Power ground + Power ground + Power ground + Power ground + Power ground + Power ground | ground | single_source | |
| OEM-A-8 | Ignition coil 2 (coil pack pin 2) | ignition_out | PROTEUS-Black35-35 | Ignition 1 | ignition_out | single_source | |
| OEM-A-9 | Engine electronics relay control | low_side_out | PROTEUS-Black35-21 | Lowside 12 | low_side_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-23 | SP-14V-1 | 0.85 | no route | ECU main power (from engine-electronics relay) | — | |
| W2 | SP-14V-1 | PROTEUS-Black23-23 | 0.85 | no route | Main relay feed | — | |
| W3 | OEM-A-1 | SP-GND-1 | 0.85 | no route | Ground (E-1) | — | |
| W4 | OEM-A-10 | SP-GND-1 | 0.85 | no route | Ground (OBD1 EGR enable) | — | |
| W5 | OEM-A-55 | SP-GND-1 | 0.85 | no route | Ground (E-3) | — | |
| W6 | OEM-A-56 | SP-GND-1 | 0.85 | no route | Ground (E-4) | — | |
| W7 | OEM-A-7 | SP-GND-1 | 0.85 | no route | Ground (E-2) | — | |
| W8 | SP-GND-1 | PROTEUS-Black23-14 | 0.85 | no route | Power ground | — | |
| W9 | SP-GND-1 | PROTEUS-Black23-19 | 0.85 | no route | Power ground | — | |
| W10 | SP-GND-1 | PROTEUS-Black23-20 | 0.85 | no route | Power ground | — | |
| W11 | SP-GND-1 | PROTEUS-Black35-17 | 0.85 | no route | Power ground | — | |
| W12 | SP-GND-1 | PROTEUS-Black35-18 | 0.85 | no route | Power ground | — | |
| W13 | SP-GND-1 | PROTEUS-Black35-24 | 0.85 | no route | Power ground | — | |
| W14 | OEM-A-16 | SP-0V-1 | 0.5 | no route | MAF ground | — | |
| W15 | OEM-A-33 | SP-0V-1 | 0.5 | no route | Sensor ground bus | — | |
| W16 | OEM-A-67 | SP-0V-1 | 0.5 | no route | Crank sensor return (VR-) | — | |
| W17 | SP-0V-1 | PROTEUS-White35-1 | 0.5 | no route | Sensor ground | — | |
| W18 | SP-0V-1 | PROTEUS-White35-2 | 0.5 | no route | Sensor ground | — | |
| W19 | SP-0V-1 | PROTEUS-White35-23 | 0.5 | no route | Sensor ground | — | |
| W20 | SP-0V-1 | PROTEUS-White35-29 | 0.5 | no route | Sensor ground | — | |
| W21 | SP-0V-1 | PROTEUS-White35-3 | 0.5 | no route | Sensor ground | — | |
| W22 | SP-0V-1 | PROTEUS-White35-4 | 0.5 | no route | Sensor ground | — | |
| W23 | SP-0V-1 | PROTEUS-White35-5 | 0.5 | no route | Sensor ground | — | |
| W24 | SP-0V-1 | PROTEUS-White35-6 | 0.5 | no route | Sensor ground | — | |
| W25 | SP-0V-1 | PROTEUS-White35-7 | 0.5 | no route | Sensor ground | — | |
| W26 | SP-0V-1 | PROTEUS-White35-8 | 0.5 | no route | Sensor ground | — | |
| W27 | OEM-A-41 | PROTEUS-White35-10 | 0.5 | no route | TPS power (+5V) | — | |
| W28 | OEM-A-68 | PROTEUS-Black23-5 | 0.5 | no route | Crank position sensor (G28, VR+) | — | |
| W29 | SP-0V-1 | PROTEUS-Black23-13 | 0.5 | no route | VR 1 negative | — | |
| W30 | OEM-A-44 | PROTEUS-Black23-1 | 0.5 | no route | Camshaft position sensor (G40) | — | |
| W31 | OEM-A-34 | PROTEUS-White35-34 | 0.5 | no route | Knock sensor 1 | — | |
| W32 | OEM-A-8 | PROTEUS-Black35-35 | 0.5 | no route | Ignition coil 2 (coil pack pin 2) | — | |
| W33 | OEM-A-60 | PROTEUS-Black35-34 | 0.5 | no route | Ignition coil 3 (coil pack pin 3) | — | |
| W34 | OEM-A-52 | PROTEUS-Black35-22 | 0.5 | no route | Ignition coil 4 (coil pack pin 4) | — | |
| W35 | OEM-A-24 | PROTEUS-Black35-3 | 0.5 | no route | Injector 1 (cyl 1) | — | |
| W36 | OEM-A-3 | PROTEUS-Black35-15 | 0.5 | no route | Injector 2 (cyl 2) | — | |
| W37 | OEM-A-26 | PROTEUS-Black35-4 | 0.5 | no route | Injector 3 (cyl 3) | — | |
| W38 | OEM-A-4 | PROTEUS-Black35-16 | 0.5 | no route | Injector 4 (cyl 4) | — | |
| W39 | OEM-A-25 | PROTEUS-Black35-5 | 0.5 | no route | Injector 5 (cyl 5) | — | |
| W40 | OEM-A-2 | PROTEUS-Black35-6 | 0.5 | no route | Injector 6 (cyl 6) | — | |
| W41 | OEM-A-38 | PROTEUS-Black23-18 | 0.5 | no route | Ignition switch (run/start) | — | |
| W42 | OEM-A-17 | PROTEUS-White35-13 | 0.5 | no route | MAF signal | — | |
| W43 | OEM-A-40 | PROTEUS-White35-24 | 0.5 | no route | Throttle position sensor 1 | — | |
| W44 | OEM-A-14 | PROTEUS-White35-20 | 0.5 | no route | Coolant temperature (CLT) | — | |
| W45 | OEM-A-49 | PROTEUS-Black35-20 | 0.5 | no route | Secondary air injection relay control | — | |
| W46 | OEM-A-6 | PROTEUS-Black35-9 | 0.5 | no route | Fuel pump relay control | — | |
| W47 | OEM-A-9 | PROTEUS-Black35-21 | 0.5 | no route | Engine electronics relay control | — | |
| W48 | OEM-A-27 | PROTEUS-Black35-10 | 0.5 | no route | Idle air control valve | — | |
| W49 | OEM-A-31 | PROTEUS-Black35-11 | 0.5 | no route | EVAP canister purge valve | — | |
| W50 | OEM-A-5 | PROTEUS-Black35-12 | 0.5 | no route | Check engine light (MIL) | — | |
| W51 | OEM-A-53 | PROTEUS-Black35-23 | 0.5 | no route | Idle air control valve (2nd) | — | |
| W52 | OEM-A-20 | PROTEUS-White35-14 | 0.5 | no route | O2 sensor 1 (primary) | — | |
| W53 | OEM-A-15 | PROTEUS-White35-19 | 0.5 | no route | EGR temperature sensor | — | |
| W54 | OEM-A-36 | PROTEUS-White35-30 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W55 | OEM-A-65 | PROTEUS-Black23-2 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W56 | OEM-A-37 | PROTEUS-Black23-10 | 0.5 | no route | A/C compressor switch | — | |
| W57 | OEM-A-39 | PROTEUS-Black23-3 | 0.5 | no route | A/C switch (cabin) | — |
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 (2)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | PROTEUS-White35-7 ↔ PROTEUS-Black23-13 | PROTEUS-White35-7 "Sensor ground" [sensor_ground] is wired to PROTEUS-Black23-13 "VR 1 negative" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 5 optional OEM pins are not mapped: OEM-A-21 Diagnostic L-line; OEM-A-22 Tachometer output; OEM-A-43 Diagnostic K-line; OEM-A-51 MFA fuel-consumption signal; OEM-A-59 Mass airflow sensor (5th terminal) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-A-54 | 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 VW VR6 not found in the ECU's docs (No VR6 cam decoder in firmware.) Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Not wired: - OEM-A 54: Battery constant (+12V): rusEFI Proteus has no battery-constant input; not needed - OEM-A 22: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on rusEFI Proteus - OEM-A 51: MFA fuel-consumption signal: no free tacho/frequency_out/low_side/ls_hs on rusEFI Proteus - OEM-A 21: Diagnostic L-line: no free k_line on rusEFI Proteus - OEM-A 43: Diagnostic K-line: no free k_line on rusEFI Proteus - OEM-A 59: Mass airflow sensor (5th terminal): no rule for class sensor_signal; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | rusEFI Proteus — board connector definitions (Black35 / White35 / Black23) | https://github.com/rusefi/rusefi/tree/master/firmware/config/boards/proteus/connectors | archive | 2026-10-05 | 738a2ea934c0 |
| 2 | community_copy | a2resource: VR6/ABA Motronic M2.9 (OBD1) engine control unit pinout | http://www.a2resource.com/electrical/management/motronicvr6aba.html | — | — | — |