VW Corrado VR6 12v (AAA) Motronic M2.9 OBD1 → ECUMASTER EMU Black (auto)
VW Corrado VR6 12v (AAA) Motronic M2.9 OBD1 — ECUMASTER — EMU Black
Drawn by Michael Gnankou · Rev 0 · proposal · 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 | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 47 wires · 6 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 | EMUBLACK-Black-13 | 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 | EMUBLACK-Black-27 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | EMUBLACK-Grey-24 | 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 | EMUBLACK-Black-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-A-41 | EMUBLACK-Black-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-A-68 | EMUBLACK-Black-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-A-44 | EMUBLACK-Black-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-A-34 | EMUBLACK-Black-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-A-8 | EMUBLACK-Grey-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-A-60 | EMUBLACK-Grey-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-52 | EMUBLACK-Grey-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-24 | EMUBLACK-Grey-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-3 | EMUBLACK-Grey-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-26 | EMUBLACK-Grey-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-4 | EMUBLACK-Grey-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-25 | EMUBLACK-Grey-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-2 | EMUBLACK-Grey-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-38 | EMUBLACK-Grey-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-17 | EMUBLACK-Black-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-40 | EMUBLACK-Black-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-14 | EMUBLACK-Black-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-49 | EMUBLACK-Grey-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-6 | EMUBLACK-Grey-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-9 | EMUBLACK-Grey-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-27 | EMUBLACK-Grey-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-31 | EMUBLACK-Grey-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-5 | EMUBLACK-Grey-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-53 | EMUBLACK-Grey-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-20 | EMUBLACK-Black-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-15 | EMUBLACK-Black-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-36 | EMUBLACK-Black-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-65 | EMUBLACK-Black-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-37 | EMUBLACK-Black-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-39 | EMUBLACK-Black-23 | 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 | EMUBLACK-Black-13 | EMUBLACK-Black-26 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 2 | EMUBLACK-Black-27 | EMUBLACK-Black-13 | open (OL) | power ground must not touch +12 V supply | |
| 3 | EMUBLACK-Black-27 | EMUBLACK-Black-26 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | EMUBLACK-Black-29 | EMUBLACK-Black-13 | open (OL) | sensor ground must not touch +12 V supply | |
| 5 | EMUBLACK-Black-29 | EMUBLACK-Black-26 | open (OL) | sensor ground must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
EMUBLACK-Black
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil #5 | — | — | — | — | — | — | — | — |
| 10 | Switch #1 In | — | W46 | — | 0.5 | OEM-A-37 | — | — | — |
| 11 | RS232 TXD | — | — | — | — | — | — | — | — |
| 12 | CAN H | — | — | — | — | — | — | — | — |
| 13 | Battery +12V | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Ignition coil #4 | — | — | — | — | — | — | — | — |
| 15 | EGT in #2 | — | — | — | — | — | — | — | — |
| 16 | Knock Sensor in #2 | — | — | — | — | — | — | — | — |
| 17 | Analog In #3 | — | W44 | — | 0.5 | OEM-A-36 | — | — | — |
| 18 | TPS In | — | W33 | — | 0.5 | OEM-A-40 | — | — | — |
| 19 | WBO Ip | — | — | — | — | — | — | — | — |
| 2 | EGT in #1 | — | — | — | — | — | — | — | — |
| 20 | VSS In | — | W45 | — | 0.5 | OEM-A-65 | — | — | — |
| 21 | Camsync In #1 | — | W20 | — | 0.5 | OEM-A-44 | — | — | — |
| 22 | WBO Rcal | — | — | — | — | — | — | — | — |
| 23 | Switch #2 In | — | W47 | — | 0.5 | OEM-A-39 | — | — | — |
| 24 | RS232 RXD | — | — | — | — | — | — | — | — |
| 25 | CAN L | — | — | — | — | — | — | — | — |
| 26 | +5V supply | — | W18 | — | 0.5 | OEM-A-41 | — | — | — |
| 27 | Power Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 28 | Ecu Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 29 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock Sensor in #1 | — | W21 | — | 0.5 | OEM-A-34 | — | — | — |
| 30 | Analog In #4 | — | — | — | — | — | — | — | — |
| 31 | Analog In #1 | — | W32 | — | 0.5 | OEM-A-17 | — | — | — |
| 32 | IAT In | — | W43 | — | 0.5 | OEM-A-15 | — | — | — |
| 33 | WBO VGND | — | — | — | — | — | — | — | — |
| 34 | +5V supply | — | — | — | — | — | — | — | — |
| 35 | Analog In #5 | — | — | — | — | — | — | — | — |
| 36 | Switch #3 In | — | — | — | — | — | — | — | — |
| 37 | Analog In #6 | — | — | — | — | — | — | — | — |
| 38 | Sensor Ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 39 | Sensor Ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 4 | Analog In #2 | — | W42 | — | 0.5 | OEM-A-20 | — | — | — |
| 5 | CLT In | — | W34 | — | 0.5 | OEM-A-14 | — | — | — |
| 6 | WBO Vs | — | — | — | — | — | — | — | — |
| 7 | Camsync In #2 | — | — | — | — | — | — | — | — |
| 8 | Primary trigger | — | W19 | — | 0.5 | OEM-A-68 | — | — | — |
| 9 | Flex Fuel In | — | — | — | — | — | — | — | — |
EMUBLACK-Grey
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil #6 | — | — | — | — | — | — | — | — |
| 10 | H-Bridge #1 Winding B | — | — | — | — | — | — | — | — |
| 11 | H-Bridge #2 Winding B | — | — | — | — | — | — | — | — |
| 12 | AUX 5 | — | W39 | — | 0.5 | OEM-A-31 | — | — | — |
| 13 | AUX 2 / Injector #8 | — | W36 | — | 0.5 | OEM-A-6 | — | — | — |
| 14 | Injector #5 | — | W29 | — | 0.5 | OEM-A-25 | — | — | — |
| 15 | Injector #2 | — | W26 | — | 0.5 | OEM-A-3 | — | — | — |
| 16 | Ignition coil #2 | — | W23 | — | 0.5 | OEM-A-60 | — | — | — |
| 17 | Power Ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Ignition +12V | — | W31 | — | 0.5 | OEM-A-38 | — | — | — |
| 19 | WBO Heater | — | W41 | — | 0.5 | OEM-A-53 | — | — | — |
| 2 | H-Bridge #1 Winding A | — | — | — | — | — | — | — | — |
| 20 | AUX 4 / Tacho | — | W38 | — | 0.5 | OEM-A-27 | — | — | — |
| 21 | AUX 1 / Injector #7 | — | W35 | — | 0.5 | OEM-A-49 | — | — | — |
| 22 | Injector #6 | — | W30 | — | 0.5 | OEM-A-2 | — | — | — |
| 23 | Injector #3 | — | W27 | — | 0.5 | OEM-A-26 | — | — | — |
| 24 | Power Ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | H-Bridge #2 Winding A | — | — | — | — | — | — | — | — |
| 4 | AUX 6 | — | W40 | — | 0.5 | OEM-A-5 | — | — | — |
| 5 | AUX 3 | — | W37 | — | 0.5 | OEM-A-9 | — | — | — |
| 6 | Injector #4 | — | W28 | — | 0.5 | OEM-A-4 | — | — | — |
| 7 | Injector #1 | — | W25 | — | 0.5 | OEM-A-24 | — | — | — |
| 8 | Ignition coil #1 | — | W22 | — | 0.5 | OEM-A-8 | — | — | — |
| 9 | Ignition coil #3 | — | W24 | — | 0.5 | OEM-A-52 | — | — | — |
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) | — | W34 | — | 0.5 | EMUBLACK-Black-5 | — | — | — |
| 15 | EGR temperature sensor | — | W43 | — | 0.5 | EMUBLACK-Black-32 | — | — | — |
| 16 | MAF ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 17 | MAF signal | — | W32 | — | 0.5 | EMUBLACK-Black-31 | — | — | — |
| 2 | Injector 6 (cyl 6) | — | W30 | — | 0.5 | EMUBLACK-Grey-22 | — | — | — |
| 20 | O2 sensor 1 (primary) | — | W42 | — | 0.5 | EMUBLACK-Black-4 | — | — | — |
| 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) | — | W25 | — | 0.5 | EMUBLACK-Grey-7 | — | — | — |
| 25 | Injector 5 (cyl 5) | — | W29 | — | 0.5 | EMUBLACK-Grey-14 | — | — | — |
| 26 | Injector 3 (cyl 3) | — | W27 | — | 0.5 | EMUBLACK-Grey-23 | — | — | — |
| 27 | Idle air control valve | — | W38 | — | 0.5 | EMUBLACK-Grey-20 | — | — | — |
| 3 | Injector 2 (cyl 2) | — | W26 | — | 0.5 | EMUBLACK-Grey-15 | — | — | — |
| 31 | EVAP canister purge valve | — | W39 | — | 0.5 | EMUBLACK-Grey-12 | — | — | — |
| 33 | Sensor ground bus | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Knock sensor 1 | — | W21 | — | 0.5 | EMUBLACK-Black-3 | — | — | — |
| 36 | Intake air temperature (IAT) | — | W44 | — | 0.5 | EMUBLACK-Black-17 | — | — | — |
| 37 | A/C compressor switch | — | W46 | — | 0.5 | EMUBLACK-Black-10 | — | — | — |
| 38 | Ignition switch (run/start) | — | W31 | — | 0.5 | EMUBLACK-Grey-18 | — | — | — |
| 39 | A/C switch (cabin) | — | W47 | — | 0.5 | EMUBLACK-Black-23 | — | — | — |
| 4 | Injector 4 (cyl 4) | — | W28 | — | 0.5 | EMUBLACK-Grey-6 | — | — | — |
| 40 | Throttle position sensor 1 | — | W33 | — | 0.5 | EMUBLACK-Black-18 | — | — | — |
| 41 | TPS power (+5V) | — | W18 | — | 0.5 | EMUBLACK-Black-26 | — | — | — |
| 43 | Diagnostic K-line | — | — | — | — | — | — | — | — |
| 44 | Camshaft position sensor (G40) | — | W20 | — | 0.5 | EMUBLACK-Black-21 | — | — | — |
| 49 | Secondary air injection relay control | — | W35 | — | 0.5 | EMUBLACK-Grey-21 | — | — | — |
| 5 | Check engine light (MIL) | — | W40 | — | 0.5 | EMUBLACK-Grey-4 | — | — | — |
| 51 | MFA fuel-consumption signal | — | — | — | — | — | — | — | — |
| 52 | Ignition coil 4 (coil pack pin 4) | — | W24 | — | 0.5 | EMUBLACK-Grey-9 | — | — | — |
| 53 | Idle air control valve (2nd) | — | W41 | — | 0.5 | EMUBLACK-Grey-19 | — | — | — |
| 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 | — | W36 | — | 0.5 | EMUBLACK-Grey-13 | — | — | — |
| 60 | Ignition coil 3 (coil pack pin 3) | — | W23 | — | 0.5 | EMUBLACK-Grey-16 | — | — | — |
| 65 | Vehicle speed sensor (VSS) | — | W45 | — | 0.5 | EMUBLACK-Black-20 | — | — | — |
| 67 | Crank sensor return (VR-) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 68 | Crank position sensor (G28, VR+) | — | W19 | — | 0.5 | EMUBLACK-Black-8 | — | — | — |
| 7 | Ground (E-2) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Ignition coil 2 (coil pack pin 2) | — | W22 | — | 0.5 | EMUBLACK-Grey-8 | — | — | — |
| 9 | Engine electronics relay control | — | W37 | — | 0.5 | EMUBLACK-Grey-5 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W12 | — | 0.5 | OEM-A-16 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-A-33 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-A-67 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | EMUBLACK-Black-29 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | EMUBLACK-Black-38 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | EMUBLACK-Black-39 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | EMUBLACK-Black-13 | — | — | — |
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 | EMUBLACK-Black-27 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | EMUBLACK-Black-28 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | EMUBLACK-Grey-17 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | EMUBLACK-Grey-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 | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-A-10 | Ground (OBD1 EGR enable) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-A-14 | Coolant temperature (CLT) | temp_in | EMUBLACK-Black-5 | CLT In | temp_in | single_source | |
| OEM-A-15 | EGR temperature sensor | temp_in | EMUBLACK-Black-32 | IAT In | temp_in | single_source | |
| OEM-A-16 | MAF ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-17 | MAF signal | analog_in | EMUBLACK-Black-31 | Analog In #1 | analog_in | single_source | |
| OEM-A-2 | Injector 6 (cyl 6) | injector_out | EMUBLACK-Grey-22 | Injector #6 | injector_out | single_source | |
| OEM-A-20 | O2 sensor 1 (primary) | lambda_nb_in | EMUBLACK-Black-4 | Analog In #2 | 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 | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-A-24 | Injector 1 (cyl 1) | injector_out | EMUBLACK-Grey-7 | Injector #1 | injector_out | single_source | |
| OEM-A-25 | Injector 5 (cyl 5) | injector_out | EMUBLACK-Grey-14 | Injector #5 | injector_out | single_source | |
| OEM-A-26 | Injector 3 (cyl 3) | injector_out | EMUBLACK-Grey-23 | Injector #3 | injector_out | single_source | |
| OEM-A-27 | Idle air control valve | low_side_out | EMUBLACK-Grey-20 | AUX 4 / Tacho | low_side_out | single_source | |
| OEM-A-3 | Injector 2 (cyl 2) | injector_out | EMUBLACK-Grey-15 | Injector #2 | injector_out | single_source | |
| OEM-A-31 | EVAP canister purge valve | low_side_out | EMUBLACK-Grey-12 | AUX 5 | low_side_out | single_source | |
| OEM-A-33 | Sensor ground bus | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-34 | Knock sensor 1 | knock_in | EMUBLACK-Black-3 | Knock Sensor in #1 | knock_in | single_source | |
| OEM-A-36 | Intake air temperature (IAT) | temp_in | EMUBLACK-Black-17 | Analog In #3 | analog_in | single_source | |
| OEM-A-37 | A/C compressor switch | digital_in | EMUBLACK-Black-10 | Switch #1 In | digital_in | single_source | |
| OEM-A-38 | Ignition switch (run/start) | digital_in | EMUBLACK-Grey-18 | Ignition +12V | digital_in | single_source | |
| OEM-A-39 | A/C switch (cabin) | digital_in | EMUBLACK-Black-23 | Switch #2 In | digital_in | single_source | |
| OEM-A-4 | Injector 4 (cyl 4) | injector_out | EMUBLACK-Grey-6 | Injector #4 | injector_out | single_source | |
| OEM-A-40 | Throttle position sensor 1 | analog_in | EMUBLACK-Black-18 | TPS In | analog_in | single_source | |
| OEM-A-41 | TPS power (+5V) | vref | EMUBLACK-Black-26 | +5V supply | vref | single_source | |
| OEM-A-43 | Diagnostic K-line | serial | — | — | — | single_source | |
| OEM-A-44 | Camshaft position sensor (G40) | trigger_in | EMUBLACK-Black-21 | Camsync In #1 | trigger_in | single_source | |
| OEM-A-49 | Secondary air injection relay control | low_side_out | EMUBLACK-Grey-21 | AUX 1 / Injector #7 | low_side_out | single_source | |
| OEM-A-5 | Check engine light (MIL) | low_side_out | EMUBLACK-Grey-4 | AUX 6 | 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 | EMUBLACK-Grey-9 | Ignition coil #3 | ignition_out | single_source | |
| OEM-A-53 | Idle air control valve (2nd) | low_side_out | EMUBLACK-Grey-19 | WBO Heater | low_side_out | single_source | |
| OEM-A-54 | Battery constant (+12V) | power_in | — | — | — | single_source | |
| OEM-A-55 | Ground (E-3) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-A-56 | Ground (E-4) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu 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 | EMUBLACK-Grey-13 | AUX 2 / Injector #8 | low_side_out | single_source | |
| OEM-A-60 | Ignition coil 3 (coil pack pin 3) | ignition_out | EMUBLACK-Grey-16 | Ignition coil #2 | ignition_out | single_source | |
| OEM-A-65 | Vehicle speed sensor (VSS) | digital_in | EMUBLACK-Black-20 | VSS In | digital_in | single_source | |
| OEM-A-67 | Crank sensor return (VR-) | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-68 | Crank position sensor (G28, VR+) | trigger_in | EMUBLACK-Black-8 | Primary trigger | trigger_in | single_source | |
| OEM-A-7 | Ground (E-2) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-A-8 | Ignition coil 2 (coil pack pin 2) | ignition_out | EMUBLACK-Grey-8 | Ignition coil #1 | ignition_out | single_source | |
| OEM-A-9 | Engine electronics relay control | low_side_out | EMUBLACK-Grey-5 | AUX 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 | EMUBLACK-Black-13 | 0.85 | no route | Battery +12V | — | |
| 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 | EMUBLACK-Black-27 | 0.85 | no route | Power Ground | — | |
| W9 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | no route | Ecu Ground | — | |
| W10 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | no route | Power Ground | — | |
| W11 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | no route | Power Ground | — | |
| 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 | EMUBLACK-Black-29 | 0.5 | no route | Sensor Ground | — | |
| W16 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | no route | Sensor Ground | — | |
| W17 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | no route | Sensor Ground | — | |
| W18 | OEM-A-41 | EMUBLACK-Black-26 | 0.5 | no route | TPS power (+5V) | — | |
| W19 | OEM-A-68 | EMUBLACK-Black-8 | 0.5 | no route | Crank position sensor (G28, VR+) | — | |
| W20 | OEM-A-44 | EMUBLACK-Black-21 | 0.5 | no route | Camshaft position sensor (G40) | — | |
| W21 | OEM-A-34 | EMUBLACK-Black-3 | 0.5 | no route | Knock sensor 1 | — | |
| W22 | OEM-A-8 | EMUBLACK-Grey-8 | 0.5 | no route | Ignition coil 2 (coil pack pin 2) | — | |
| W23 | OEM-A-60 | EMUBLACK-Grey-16 | 0.5 | no route | Ignition coil 3 (coil pack pin 3) | — | |
| W24 | OEM-A-52 | EMUBLACK-Grey-9 | 0.5 | no route | Ignition coil 4 (coil pack pin 4) | — | |
| W25 | OEM-A-24 | EMUBLACK-Grey-7 | 0.5 | no route | Injector 1 (cyl 1) | — | |
| W26 | OEM-A-3 | EMUBLACK-Grey-15 | 0.5 | no route | Injector 2 (cyl 2) | — | |
| W27 | OEM-A-26 | EMUBLACK-Grey-23 | 0.5 | no route | Injector 3 (cyl 3) | — | |
| W28 | OEM-A-4 | EMUBLACK-Grey-6 | 0.5 | no route | Injector 4 (cyl 4) | — | |
| W29 | OEM-A-25 | EMUBLACK-Grey-14 | 0.5 | no route | Injector 5 (cyl 5) | — | |
| W30 | OEM-A-2 | EMUBLACK-Grey-22 | 0.5 | no route | Injector 6 (cyl 6) | — | |
| W31 | OEM-A-38 | EMUBLACK-Grey-18 | 0.5 | no route | Ignition switch (run/start) | — | |
| W32 | OEM-A-17 | EMUBLACK-Black-31 | 0.5 | no route | MAF signal | — | |
| W33 | OEM-A-40 | EMUBLACK-Black-18 | 0.5 | no route | Throttle position sensor 1 | — | |
| W34 | OEM-A-14 | EMUBLACK-Black-5 | 0.5 | no route | Coolant temperature (CLT) | — | |
| W35 | OEM-A-49 | EMUBLACK-Grey-21 | 0.5 | no route | Secondary air injection relay control | — | |
| W36 | OEM-A-6 | EMUBLACK-Grey-13 | 0.5 | no route | Fuel pump relay control | — | |
| W37 | OEM-A-9 | EMUBLACK-Grey-5 | 0.5 | no route | Engine electronics relay control | — | |
| W38 | OEM-A-27 | EMUBLACK-Grey-20 | 0.5 | no route | Idle air control valve | — | |
| W39 | OEM-A-31 | EMUBLACK-Grey-12 | 0.5 | no route | EVAP canister purge valve | — | |
| W40 | OEM-A-5 | EMUBLACK-Grey-4 | 0.5 | no route | Check engine light (MIL) | — | |
| W41 | OEM-A-53 | EMUBLACK-Grey-19 | 0.5 | no route | Idle air control valve (2nd) | — | |
| W42 | OEM-A-20 | EMUBLACK-Black-4 | 0.5 | no route | O2 sensor 1 (primary) | — | |
| W43 | OEM-A-15 | EMUBLACK-Black-32 | 0.5 | no route | EGR temperature sensor | — | |
| W44 | OEM-A-36 | EMUBLACK-Black-17 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W45 | OEM-A-65 | EMUBLACK-Black-20 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W46 | OEM-A-37 | EMUBLACK-Black-10 | 0.5 | no route | A/C compressor switch | — | |
| W47 | OEM-A-39 | EMUBLACK-Black-23 | 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 | OEM-A-36 ↔ EMUBLACK-Black-17 | OEM-A-36 "Intake air temperature (IAT)" [temp_in] is wired to EMUBLACK-Black-17 "Analog In #3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| 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
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): ECUMASTER EMU Black has no battery-constant input; not needed - OEM-A 22: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on ECUMASTER EMU Black - OEM-A 51: MFA fuel-consumption signal: no free tacho/frequency_out/low_side/ls_hs on ECUMASTER EMU Black - OEM-A 21: Diagnostic L-line: no free k_line on ECUMASTER EMU Black - OEM-A 43: Diagnostic K-line: no free k_line on ECUMASTER EMU Black - 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 | ECUMASTER EMU Black — pinout (Black 39-pin / Grey 24-pin) | https://www.ecumaster.com/wp/wp-content/uploads/2020/05/EMU_Black_pinout.pdf | archive | 2026-10-05 | 096b2b4df1bd |
| 2 | community_copy | a2resource: VR6/ABA Motronic M2.9 (OBD1) engine control unit pinout | http://www.a2resource.com/electrical/management/motronicvr6aba.html | — | — | — |