VW Corrado VR6 12v (AAA) Motronic M2.9 OBD1 → Emtron Shadow 8 (auto)
VW Corrado VR6 12v (AAA) Motronic M2.9 OBD1 — Emtron — Shadow 8
⚠ 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 | none |
| Size of the job | 47 wires · 6 connectors · 3 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Terminals | 3-1447221-4 |
| 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 | SHADOW8-A-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | SHADOW8-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-54 | SHADOW8-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-1 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-10 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-A-55 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-A-56 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-A-7 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | SHADOW8-A-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | SHADOW8-A-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-A-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-A-33 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-A-67 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | SHADOW8-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | SHADOW8-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-A-41 | SHADOW8-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-A-68 | SHADOW8-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-A-44 | SHADOW8-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-A-34 | SHADOW8-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-A-8 | SHADOW8-B-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-A-60 | SHADOW8-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-A-52 | SHADOW8-B-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-24 | SHADOW8-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-3 | SHADOW8-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-26 | SHADOW8-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-4 | SHADOW8-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-25 | SHADOW8-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-2 | SHADOW8-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-38 | SHADOW8-B-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-17 | SHADOW8-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-40 | SHADOW8-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-14 | SHADOW8-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-49 | SHADOW8-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-6 | SHADOW8-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-9 | SHADOW8-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-27 | SHADOW8-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-31 | SHADOW8-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-5 | SHADOW8-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-53 | SHADOW8-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-22 | SHADOW8-B-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-20 | SHADOW8-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-15 | SHADOW8-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-36 | SHADOW8-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-65 | SHADOW8-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-37 | SHADOW8-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-39 | SHADOW8-A-28 | 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 | SHADOW8-A-1 | SHADOW8-A-3 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 2 | SHADOW8-A-3 | SHADOW8-B-1 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 3 | SHADOW8-A-34 | SHADOW8-A-1 | open (OL) | power ground must not touch +12 V supply | |
| 4 | SHADOW8-A-34 | SHADOW8-A-3 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | SHADOW8-A-34 | SHADOW8-B-1 | open (OL) | power ground must not touch +12 V supply | |
| 6 | SHADOW8-A-4 | SHADOW8-A-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 7 | SHADOW8-A-4 | SHADOW8-A-3 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 8 | SHADOW8-A-4 | SHADOW8-B-1 | open (OL) | sensor ground must not touch +12 V supply |
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) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Ground (OBD1 EGR enable) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Coolant temperature (CLT) | — | W33 | — | 0.5 | SHADOW8-A-12 | — | — | — |
| 15 | EGR temperature sensor | — | W43 | — | 0.5 | SHADOW8-A-14 | — | — | — |
| 16 | MAF ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 17 | MAF signal | — | W31 | — | 0.5 | SHADOW8-A-10 | — | — | — |
| 2 | Injector 6 (cyl 6) | — | W29 | — | 0.5 | SHADOW8-B-7 | — | — | — |
| 20 | O2 sensor 1 (primary) | — | W42 | — | 0.5 | SHADOW8-A-13 | — | — | — |
| 21 | Diagnostic L-line | — | — | — | — | — | — | — | — |
| 22 | Tachometer output | — | W41 | — | 0.5 | SHADOW8-B-17 | — | — | — |
| 23 | ECU main power (from engine-electronics relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Injector 1 (cyl 1) | — | W24 | — | 0.5 | SHADOW8-B-2 | — | — | — |
| 25 | Injector 5 (cyl 5) | — | W28 | — | 0.5 | SHADOW8-B-6 | — | — | — |
| 26 | Injector 3 (cyl 3) | — | W26 | — | 0.5 | SHADOW8-B-4 | — | — | — |
| 27 | Idle air control valve | — | W37 | — | 0.5 | SHADOW8-B-13 | — | — | — |
| 3 | Injector 2 (cyl 2) | — | W25 | — | 0.5 | SHADOW8-B-3 | — | — | — |
| 31 | EVAP canister purge valve | — | W38 | — | 0.5 | SHADOW8-B-14 | — | — | — |
| 33 | Sensor ground bus | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Knock sensor 1 | — | W20 | — | 0.5 | SHADOW8-A-16 | — | — | — |
| 36 | Intake air temperature (IAT) | — | W44 | — | 0.5 | SHADOW8-A-18 | — | — | — |
| 37 | A/C compressor switch | — | W46 | — | 0.5 | SHADOW8-A-27 | — | — | — |
| 38 | Ignition switch (run/start) | — | W30 | — | 0.5 | SHADOW8-B-21 | — | — | — |
| 39 | A/C switch (cabin) | — | W47 | — | 0.5 | SHADOW8-A-28 | — | — | — |
| 4 | Injector 4 (cyl 4) | — | W27 | — | 0.5 | SHADOW8-B-5 | — | — | — |
| 40 | Throttle position sensor 1 | — | W32 | — | 0.5 | SHADOW8-A-11 | — | — | — |
| 41 | TPS power (+5V) | — | W17 | — | 0.5 | SHADOW8-A-3 | — | — | — |
| 43 | Diagnostic K-line | — | — | — | — | — | — | — | — |
| 44 | Camshaft position sensor (G40) | — | W19 | — | 0.5 | SHADOW8-A-6 | — | — | — |
| 49 | Secondary air injection relay control | — | W34 | — | 0.5 | SHADOW8-B-10 | — | — | — |
| 5 | Check engine light (MIL) | — | W39 | — | 0.5 | SHADOW8-B-15 | — | — | — |
| 51 | MFA fuel-consumption signal | — | — | — | — | — | — | — | — |
| 52 | Ignition coil 4 (coil pack pin 4) | — | W23 | — | 0.5 | SHADOW8-B-29 | — | — | — |
| 53 | Idle air control valve (2nd) | — | W40 | — | 0.5 | SHADOW8-B-16 | — | — | — |
| 54 | Battery constant (+12V) | — | W4 | — | 0.85 | SHADOW8-B-1 | — | — | — |
| 55 | Ground (E-3) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 56 | Ground (E-4) | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 59 | Mass airflow sensor (5th terminal) | — | — | — | — | — | — | — | — |
| 6 | Fuel pump relay control | — | W35 | — | 0.5 | SHADOW8-B-11 | — | — | — |
| 60 | Ignition coil 3 (coil pack pin 3) | — | W22 | — | 0.5 | SHADOW8-B-28 | — | — | — |
| 65 | Vehicle speed sensor (VSS) | — | W45 | — | 0.5 | SHADOW8-A-26 | — | — | — |
| 67 | Crank sensor return (VR-) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 68 | Crank position sensor (G28, VR+) | — | W18 | — | 0.5 | SHADOW8-A-5 | — | — | — |
| 7 | Ground (E-2) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Ignition coil 2 (coil pack pin 2) | — | W21 | — | 0.5 | SHADOW8-B-27 | — | — | — |
| 9 | Engine electronics relay control | — | W36 | — | 0.5 | SHADOW8-B-12 | — | — | — |
SHADOW8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU supply | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | 8.0V sensor supply | — | — | — | — | — | — | — | — |
| 3 | 5.0V sensor supply | — | W17 | — | 0.5 | OEM-A-41 | — | — | — |
| 4 | 0V analog reference | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Crank position sensor | — | W18 | — | 0.5 | OEM-A-68 | — | — | — |
| 6 | Sync position sensor | — | W19 | — | 0.5 | OEM-A-44 | — | — | — |
| 7 | Trigger ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Shield | — | — | — | — | — | — | — | — |
| 9 | Ground 1 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Analog voltage 1 | — | W31 | — | 0.5 | OEM-A-17 | — | — | — |
| 11 | Analog voltage 2 | — | W32 | — | 0.5 | OEM-A-40 | — | — | — |
| 12 | Analog voltage 3 | — | W33 | — | 0.5 | OEM-A-14 | — | — | — |
| 13 | Analog voltage 4 | — | W42 | — | 0.5 | OEM-A-20 | — | — | — |
| 14 | Analog voltage 5 | — | W43 | — | 0.5 | OEM-A-15 | — | — | — |
| 15 | CAN bus 1 high | — | — | — | — | — | — | — | — |
| 16 | Knock 1 + | — | W20 | — | 0.5 | OEM-A-34 | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | Analog voltage 6 | — | W44 | — | 0.5 | OEM-A-36 | — | — | — |
| 19 | Analog voltage 7 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 20 | Analog voltage 8 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 21 | Analog voltage 9 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 22 | Analog voltage 10 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 23 | CAN bus 1 low | — | — | — | — | — | — | — | — |
| 24 | Knock 2 + | — | — | — | — | — | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | Digital input 1 | — | W45 | — | 0.5 | OEM-A-65 | — | — | — |
| 27 | Digital input 2 | — | W46 | — | 0.5 | OEM-A-37 | — | — | — |
| 28 | Digital input 3 | — | W47 | — | 0.5 | OEM-A-39 | — | — | — |
| 29 | Digital input 4 | — | — | — | — | — | — | — | — |
| 30 | Digital input 5 | — | — | — | — | — | — | — | — |
| 31 | Digital input 6 | — | — | — | — | — | — | — | — |
| 32 | CAN bus 2 high | — | — | — | — | — | — | — | — |
| 33 | CAN bus 2 low | — | — | — | — | — | — | — | — |
| 34 | Ground 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
SHADOW8-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (HOT) supply | — | W4 | — | 0.85 | OEM-A-54 | — | — | — |
| 2 | Injector cylinder 1 | — | W24 | — | 0.5 | OEM-A-24 | — | — | — |
| 3 | Injector cylinder 2 | — | W25 | — | 0.5 | OEM-A-3 | — | — | — |
| 4 | Injector cylinder 3 | — | W26 | — | 0.5 | OEM-A-26 | — | — | — |
| 5 | Injector cylinder 4 | — | W27 | — | 0.5 | OEM-A-4 | — | — | — |
| 6 | Injector cylinder 5 | — | W28 | — | 0.5 | OEM-A-25 | — | — | — |
| 7 | Injector cylinder 6 | — | W29 | — | 0.5 | OEM-A-2 | — | — | — |
| 8 | Injector cylinder 7 | — | — | — | — | — | — | — | — |
| 9 | Injector cylinder 8 | — | — | — | — | — | — | — | — |
| 10 | Aux output 1 | — | W34 | — | 0.5 | OEM-A-49 | — | — | — |
| 11 | Aux output 2 | — | W35 | — | 0.5 | OEM-A-6 | — | — | — |
| 12 | Aux output 3 | — | W36 | — | 0.5 | OEM-A-9 | — | — | — |
| 13 | Aux output 4 | — | W37 | — | 0.5 | OEM-A-27 | — | — | — |
| 14 | Aux output 5 | — | W38 | — | 0.5 | OEM-A-31 | — | — | — |
| 15 | Aux output 6 | — | W39 | — | 0.5 | OEM-A-5 | — | — | — |
| 16 | Aux output 7 | — | W40 | — | 0.5 | OEM-A-53 | — | — | — |
| 17 | Aux output 8 | — | W41 | — | 0.5 | OEM-A-22 | — | — | — |
| 18 | Digital input 7 | — | — | — | — | — | — | — | — |
| 19 | Digital input 8 | — | — | — | — | — | — | — | — |
| 20 | Digital input 9 | — | — | — | — | — | — | — | — |
| 21 | Digital input 10 / ignition switch | — | W30 | — | 0.5 | OEM-A-38 | — | — | — |
| 22 | Aux output 9 | — | — | — | — | — | — | — | — |
| 23 | Aux output 10 | — | — | — | — | — | — | — | — |
| 24 | Aux output 11 | — | — | — | — | — | — | — | — |
| 25 | Aux output 12 | — | — | — | — | — | — | — | — |
| 26 | Aux 9–12 power supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | Ignition TTL cylinder 1 | — | W21 | — | 0.5 | OEM-A-8 | — | — | — |
| 28 | Ignition TTL cylinder 2 | — | W22 | — | 0.5 | OEM-A-60 | — | — | — |
| 29 | Ignition TTL cylinder 3 | — | W23 | — | 0.5 | OEM-A-52 | — | — | — |
| 30 | Ignition TTL cylinder 4 | — | — | — | — | — | — | — | — |
| 31 | Ignition TTL cylinder 5 | — | — | — | — | — | — | — | — |
| 32 | Ignition TTL cylinder 6 | — | — | — | — | — | — | — | — |
| 33 | Ignition TTL cylinder 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition TTL cylinder 8 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | OEM-A-33 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-A-16 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-A-67 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | SHADOW8-A-4 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | SHADOW8-A-7 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | SHADOW8-A-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | SHADOW8-B-26 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A-1 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-10 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-A-55 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-A-56 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-A-7 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | SHADOW8-A-34 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | SHADOW8-A-9 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Ground (E-1) | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-A-10 | Ground (OBD1 EGR enable) | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-A-14 | Coolant temperature (CLT) | temp_in | SHADOW8-A-12 | Analog voltage 3 | analog_in | single_source | |
| OEM-A-15 | EGR temperature sensor | temp_in | SHADOW8-A-14 | Analog voltage 5 | analog_in | single_source | |
| OEM-A-16 | MAF ground | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | single_source | |
| OEM-A-17 | MAF signal | analog_in | SHADOW8-A-10 | Analog voltage 1 | analog_in | single_source | |
| OEM-A-2 | Injector 6 (cyl 6) | injector_out | SHADOW8-B-7 | Injector cylinder 6 | injector_out | single_source | |
| OEM-A-20 | O2 sensor 1 (primary) | lambda_nb_in | SHADOW8-A-13 | Analog voltage 4 | analog_in | single_source | |
| OEM-A-21 | Diagnostic L-line | serial | — | — | — | single_source | |
| OEM-A-22 | Tachometer output | tacho_out | SHADOW8-B-17 | Aux output 8 | switch_out | single_source | |
| OEM-A-23 | ECU main power (from engine-electronics relay) | power_in | SHADOW8-A-1 + SHADOW8-B-26 | ECU supply + Aux 9–12 power supply | power_in | single_source | |
| OEM-A-24 | Injector 1 (cyl 1) | injector_out | SHADOW8-B-2 | Injector cylinder 1 | injector_out | single_source | |
| OEM-A-25 | Injector 5 (cyl 5) | injector_out | SHADOW8-B-6 | Injector cylinder 5 | injector_out | single_source | |
| OEM-A-26 | Injector 3 (cyl 3) | injector_out | SHADOW8-B-4 | Injector cylinder 3 | injector_out | single_source | |
| OEM-A-27 | Idle air control valve | low_side_out | SHADOW8-B-13 | Aux output 4 | low_side_out | single_source | |
| OEM-A-3 | Injector 2 (cyl 2) | injector_out | SHADOW8-B-3 | Injector cylinder 2 | injector_out | single_source | |
| OEM-A-31 | EVAP canister purge valve | low_side_out | SHADOW8-B-14 | Aux output 5 | switch_out | single_source | |
| OEM-A-33 | Sensor ground bus | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | single_source | |
| OEM-A-34 | Knock sensor 1 | knock_in | SHADOW8-A-16 | Knock 1 + | knock_in | single_source | |
| OEM-A-36 | Intake air temperature (IAT) | temp_in | SHADOW8-A-18 | Analog voltage 6 | analog_in | single_source | |
| OEM-A-37 | A/C compressor switch | digital_in | SHADOW8-A-27 | Digital input 2 | digital_in | single_source | |
| OEM-A-38 | Ignition switch (run/start) | digital_in | SHADOW8-B-21 | Digital input 10 / ignition switch | digital_in | single_source | |
| OEM-A-39 | A/C switch (cabin) | digital_in | SHADOW8-A-28 | Digital input 3 | digital_in | single_source | |
| OEM-A-4 | Injector 4 (cyl 4) | injector_out | SHADOW8-B-5 | Injector cylinder 4 | injector_out | single_source | |
| OEM-A-40 | Throttle position sensor 1 | analog_in | SHADOW8-A-11 | Analog voltage 2 | analog_in | single_source | |
| OEM-A-41 | TPS power (+5V) | vref | SHADOW8-A-3 | 5.0V sensor supply | vref | single_source | |
| OEM-A-43 | Diagnostic K-line | serial | — | — | — | single_source | |
| OEM-A-44 | Camshaft position sensor (G40) | trigger_in | SHADOW8-A-6 | Sync position sensor | trigger_in | single_source | |
| OEM-A-49 | Secondary air injection relay control | low_side_out | SHADOW8-B-10 | Aux output 1 | low_side_out | single_source | |
| OEM-A-5 | Check engine light (MIL) | low_side_out | SHADOW8-B-15 | Aux output 6 | switch_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 | SHADOW8-B-29 | Ignition TTL cylinder 3 | ignition_out | single_source | |
| OEM-A-53 | Idle air control valve (2nd) | low_side_out | SHADOW8-B-16 | Aux output 7 | switch_out | single_source | |
| OEM-A-54 | Battery constant (+12V) | power_in | SHADOW8-B-1 | Battery constant (HOT) supply | power_in | single_source | |
| OEM-A-55 | Ground (E-3) | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-A-56 | Ground (E-4) | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | 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 | SHADOW8-B-11 | Aux output 2 | low_side_out | single_source | |
| OEM-A-60 | Ignition coil 3 (coil pack pin 3) | ignition_out | SHADOW8-B-28 | Ignition TTL cylinder 2 | ignition_out | single_source | |
| OEM-A-65 | Vehicle speed sensor (VSS) | digital_in | SHADOW8-A-26 | Digital input 1 | digital_in | single_source | |
| OEM-A-67 | Crank sensor return (VR-) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | single_source | |
| OEM-A-68 | Crank position sensor (G28, VR+) | trigger_in | SHADOW8-A-5 | Crank position sensor | trigger_in | single_source | |
| OEM-A-7 | Ground (E-2) | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-A-8 | Ignition coil 2 (coil pack pin 2) | ignition_out | SHADOW8-B-27 | Ignition TTL cylinder 1 | ignition_out | single_source | |
| OEM-A-9 | Engine electronics relay control | low_side_out | SHADOW8-B-12 | Aux output 3 | 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 | SHADOW8-A-1 | 0.85 | no route | ECU supply | — | |
| W3 | SP-14V-1 | SHADOW8-B-26 | 0.85 | no route | Aux 9–12 power supply | — | |
| W4 | OEM-A-54 | SHADOW8-B-1 | 0.85 | no route | Battery constant (+12V) | — | |
| W5 | OEM-A-1 | SP-GND-1 | 0.85 | no route | Ground (E-1) | — | |
| W6 | OEM-A-10 | SP-GND-1 | 0.85 | no route | Ground (OBD1 EGR enable) | — | |
| W7 | OEM-A-55 | SP-GND-1 | 0.85 | no route | Ground (E-3) | — | |
| W8 | OEM-A-56 | SP-GND-1 | 0.85 | no route | Ground (E-4) | — | |
| W9 | OEM-A-7 | SP-GND-1 | 0.85 | no route | Ground (E-2) | — | |
| W10 | SP-GND-1 | SHADOW8-A-34 | 0.85 | no route | Ground 2 | — | |
| W11 | SP-GND-1 | SHADOW8-A-9 | 0.85 | no route | Ground 1 | — | |
| W12 | OEM-A-16 | SP-0V-1 | 0.5 | no route | MAF ground | — | |
| W13 | OEM-A-33 | SP-0V-1 | 0.5 | no route | Sensor ground bus | — | |
| W14 | OEM-A-67 | SP-0V-1 | 0.5 | no route | Crank sensor return (VR-) | — | |
| W15 | SP-0V-1 | SHADOW8-A-4 | 0.5 | no route | 0V analog reference | — | |
| W16 | SP-0V-1 | SHADOW8-A-7 | 0.5 | no route | Trigger ground | — | |
| W17 | OEM-A-41 | SHADOW8-A-3 | 0.5 | no route | TPS power (+5V) | — | |
| W18 | OEM-A-68 | SHADOW8-A-5 | 0.5 | no route | Crank position sensor (G28, VR+) | — | |
| W19 | OEM-A-44 | SHADOW8-A-6 | 0.5 | no route | Camshaft position sensor (G40) | — | |
| W20 | OEM-A-34 | SHADOW8-A-16 | 0.5 | no route | Knock sensor 1 | — | |
| W21 | OEM-A-8 | SHADOW8-B-27 | 0.5 | no route | Ignition coil 2 (coil pack pin 2) | — | |
| W22 | OEM-A-60 | SHADOW8-B-28 | 0.5 | no route | Ignition coil 3 (coil pack pin 3) | — | |
| W23 | OEM-A-52 | SHADOW8-B-29 | 0.5 | no route | Ignition coil 4 (coil pack pin 4) | — | |
| W24 | OEM-A-24 | SHADOW8-B-2 | 0.5 | no route | Injector 1 (cyl 1) | — | |
| W25 | OEM-A-3 | SHADOW8-B-3 | 0.5 | no route | Injector 2 (cyl 2) | — | |
| W26 | OEM-A-26 | SHADOW8-B-4 | 0.5 | no route | Injector 3 (cyl 3) | — | |
| W27 | OEM-A-4 | SHADOW8-B-5 | 0.5 | no route | Injector 4 (cyl 4) | — | |
| W28 | OEM-A-25 | SHADOW8-B-6 | 0.5 | no route | Injector 5 (cyl 5) | — | |
| W29 | OEM-A-2 | SHADOW8-B-7 | 0.5 | no route | Injector 6 (cyl 6) | — | |
| W30 | OEM-A-38 | SHADOW8-B-21 | 0.5 | no route | Ignition switch (run/start) | — | |
| W31 | OEM-A-17 | SHADOW8-A-10 | 0.5 | no route | MAF signal | — | |
| W32 | OEM-A-40 | SHADOW8-A-11 | 0.5 | no route | Throttle position sensor 1 | — | |
| W33 | OEM-A-14 | SHADOW8-A-12 | 0.5 | no route | Coolant temperature (CLT) | — | |
| W34 | OEM-A-49 | SHADOW8-B-10 | 0.5 | no route | Secondary air injection relay control | — | |
| W35 | OEM-A-6 | SHADOW8-B-11 | 0.5 | no route | Fuel pump relay control | — | |
| W36 | OEM-A-9 | SHADOW8-B-12 | 0.5 | no route | Engine electronics relay control | — | |
| W37 | OEM-A-27 | SHADOW8-B-13 | 0.5 | no route | Idle air control valve | — | |
| W38 | OEM-A-31 | SHADOW8-B-14 | 0.5 | no route | EVAP canister purge valve | — | |
| W39 | OEM-A-5 | SHADOW8-B-15 | 0.5 | no route | Check engine light (MIL) | — | |
| W40 | OEM-A-53 | SHADOW8-B-16 | 0.5 | no route | Idle air control valve (2nd) | — | |
| W41 | OEM-A-22 | SHADOW8-B-17 | 0.5 | no route | Tachometer output | — | |
| W42 | OEM-A-20 | SHADOW8-A-13 | 0.5 | no route | O2 sensor 1 (primary) | — | |
| W43 | OEM-A-15 | SHADOW8-A-14 | 0.5 | no route | EGR temperature sensor | — | |
| W44 | OEM-A-36 | SHADOW8-A-18 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W45 | OEM-A-65 | SHADOW8-A-26 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W46 | OEM-A-37 | SHADOW8-A-27 | 0.5 | no route | A/C compressor switch | — | |
| W47 | OEM-A-39 | SHADOW8-A-28 | 0.5 | no route | A/C switch (cabin) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | 4-1437290-1 | TE | Superseal 1.0 34-way plug, Key 2 | 1.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 38.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (8)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | OEM-A-14 ↔ SHADOW8-A-12 | OEM-A-14 "Coolant temperature (CLT)" [temp_in] is wired to SHADOW8-A-12 "Analog voltage 3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-A-15 ↔ SHADOW8-A-14 | OEM-A-15 "EGR temperature sensor" [temp_in] is wired to SHADOW8-A-14 "Analog voltage 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-A-22 ↔ SHADOW8-B-17 | OEM-A-22 "Tachometer output" [tacho_out] is wired to SHADOW8-B-17 "Aux output 8" [switch_out]. Frequency output on a general output: set it up as a tacho/frequency output with the right pull-up. |
| info | NET_FAMILY | OEM-A-31 ↔ SHADOW8-B-14 | OEM-A-31 "EVAP canister purge valve" [low_side_out] is wired to SHADOW8-B-14 "Aux output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-36 ↔ SHADOW8-A-18 | OEM-A-36 "Intake air temperature (IAT)" [temp_in] is wired to SHADOW8-A-18 "Analog voltage 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-A-5 ↔ SHADOW8-B-15 | OEM-A-5 "Check engine light (MIL)" [low_side_out] is wired to SHADOW8-B-15 "Aux output 6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-53 ↔ SHADOW8-B-16 | OEM-A-53 "Idle air control valve (2nd)" [low_side_out] is wired to SHADOW8-B-16 "Aux output 7" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 4 optional OEM pins are not mapped: OEM-A-21 Diagnostic L-line; OEM-A-43 Diagnostic K-line; OEM-A-51 MFA fuel-consumption signal; OEM-A-59 Mass airflow sensor (5th terminal) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for VW VR6 not found in the ECU's docs (No VR6 decoder.) Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Not wired: - SHADOW8-A 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-A 51: MFA fuel-consumption signal: no free tacho/frequency_out/low_side/ls_hs on Emtron Shadow 8 - OEM-A 21: Diagnostic L-line: no free k_line on Emtron Shadow 8 - OEM-A 43: Diagnostic K-line: no free k_line on Emtron Shadow 8 - 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 | Emtron Shadow 8 ECU datasheet | https://docs.emtronaustralia.com.au/engine-management/datasheets/shadow-8-datasheet/index.html | archive | 2026-10-05 | f004c9a8d60c |
| 4 | vendor_doc | Emtron Shadow 8 pinout | https://docs.emtronaustralia.com.au/engine-management/wiring/shadow-8/shadow-8-pinout/index.html | archive | 2026-10-05 | f510053951c7 |
| 2 | community_copy | a2resource: VR6/ABA Motronic M2.9 (OBD1) engine control unit pinout | http://www.a2resource.com/electrical/management/motronicvr6aba.html | — | — | — |