Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) → ECUMASTER EMU Black (auto)
Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) — ECUMASTER — EMU Black
⚠ 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 | 53 wires · 8 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-D-4A | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-D-4E | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | EMUBLACK-Black-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-1AF | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-1AJ | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-1L | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | EMUBLACK-Black-27 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-A-1AB | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-A-1X | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-C-3AB | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-C-3S | 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-C-3A | EMUBLACK-Black-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C-3R | EMUBLACK-Black-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-3U | EMUBLACK-Black-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-3O | EMUBLACK-Black-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-D-4AF | EMUBLACK-Grey-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-D-4AJ | EMUBLACK-Grey-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-D-4AN | EMUBLACK-Grey-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-1Q | EMUBLACK-Grey-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-1U | EMUBLACK-Grey-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-1Y | EMUBLACK-Grey-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-1AC | EMUBLACK-Grey-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-D-4C | EMUBLACK-Grey-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-1AA | EMUBLACK-Grey-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-1AE | EMUBLACK-Grey-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-1S | EMUBLACK-Grey-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-1W | EMUBLACK-Grey-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-1H | EMUBLACK-Grey-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-D-4D | EMUBLACK-Grey-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-D-4F | EMUBLACK-Grey-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-D-4G | EMUBLACK-Grey-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-D-4I | EMUBLACK-Grey-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-D-4K | EMUBLACK-Grey-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-D-4L | EMUBLACK-Grey-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-1C | EMUBLACK-Grey-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-D-4AH | EMUBLACK-Black-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-C-3I | EMUBLACK-Black-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-C-3D | EMUBLACK-Black-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-C-3W | EMUBLACK-Black-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-C-3T | EMUBLACK-Black-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-C-3V | EMUBLACK-Black-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-C-3H | EMUBLACK-Black-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-D-4Q | EMUBLACK-Black-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-D-4AA | EMUBLACK-Black-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-D-4S | EMUBLACK-Black-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-D-4V | EMUBLACK-Black-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-D-4W | EMUBLACK-Black-30 | 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-26 | EMUBLACK-Black-13 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 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 | — | W50 | — | 0.5 | OEM-D-4AA | — | — | — |
| 11 | RS232 TXD | — | — | — | — | — | — | — | — |
| 12 | CAN H | — | — | — | — | — | — | — | — |
| 13 | Battery +12V | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Ignition coil #4 | — | — | — | — | — | — | — | — |
| 15 | EGT in #2 | — | — | — | — | — | — | — | — |
| 16 | Knock Sensor in #2 | — | — | — | — | — | — | — | — |
| 17 | Analog In #3 | — | W48 | — | 0.5 | OEM-C-3H | — | — | — |
| 18 | TPS In | — | W43 | — | 0.5 | OEM-C-3I | — | — | — |
| 19 | WBO Ip | — | — | — | — | — | — | — | — |
| 2 | EGT in #1 | — | — | — | — | — | — | — | — |
| 20 | VSS In | — | W49 | — | 0.5 | OEM-D-4Q | — | — | — |
| 21 | Camsync In #1 | — | W20 | — | 0.5 | OEM-C-3U | — | — | — |
| 22 | WBO Rcal | — | — | — | — | — | — | — | — |
| 23 | Switch #2 In | — | W51 | — | 0.5 | OEM-D-4S | — | — | — |
| 24 | RS232 RXD | — | — | — | — | — | — | — | — |
| 25 | CAN L | — | — | — | — | — | — | — | — |
| 26 | +5V supply | — | W18 | — | 0.5 | OEM-C-3A | — | — | — |
| 27 | Power Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 28 | Ecu Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 29 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock Sensor in #1 | — | W21 | — | 0.5 | OEM-C-3O | — | — | — |
| 30 | Analog In #4 | — | W53 | — | 0.5 | OEM-D-4W | — | — | — |
| 31 | Analog In #1 | — | W42 | — | 0.5 | OEM-D-4AH | — | — | — |
| 32 | IAT In | — | W45 | — | 0.5 | OEM-C-3W | — | — | — |
| 33 | WBO VGND | — | — | — | — | — | — | — | — |
| 34 | +5V supply | — | — | — | — | — | — | — | — |
| 35 | Analog In #5 | — | — | — | — | — | — | — | — |
| 36 | Switch #3 In | — | W52 | — | 0.5 | OEM-D-4V | — | — | — |
| 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 | — | W44 | — | 0.5 | OEM-C-3D | — | — | — |
| 5 | CLT In | — | W46 | — | 0.5 | OEM-C-3T | — | — | — |
| 6 | WBO Vs | — | — | — | — | — | — | — | — |
| 7 | Camsync In #2 | — | — | — | — | — | — | — | — |
| 8 | Primary trigger | — | W19 | — | 0.5 | OEM-C-3R | — | — | — |
| 9 | Flex Fuel In | — | W47 | — | 0.5 | OEM-C-3V | — | — | — |
EMUBLACK-Grey
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil #6 | — | — | — | — | — | — | — | — |
| 10 | H-Bridge #1 Winding B | — | W30 | — | 0.5 | OEM-A-1AA | — | — | — |
| 11 | H-Bridge #2 Winding B | — | W32 | — | 0.5 | OEM-A-1S | — | — | — |
| 12 | AUX 5 | — | W38 | — | 0.5 | OEM-D-4I | — | — | — |
| 13 | AUX 2 / Injector #8 | — | W35 | — | 0.5 | OEM-D-4D | — | — | — |
| 14 | Injector #5 | — | W40 | — | 0.5 | OEM-D-4L | — | — | — |
| 15 | Injector #2 | — | W26 | — | 0.5 | OEM-A-1U | — | — | — |
| 16 | Ignition coil #2 | — | W23 | — | 0.5 | OEM-D-4AJ | — | — | — |
| 17 | Power Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Ignition +12V | — | W29 | — | 0.5 | OEM-D-4C | — | — | — |
| 19 | WBO Heater | — | — | — | — | — | — | — | — |
| 2 | H-Bridge #1 Winding A | — | W31 | — | 0.5 | OEM-A-1AE | — | — | — |
| 20 | AUX 4 / Tacho | — | W37 | — | 0.5 | OEM-D-4G | — | — | — |
| 21 | AUX 1 / Injector #7 | — | W34 | — | 0.5 | OEM-A-1H | — | — | — |
| 22 | Injector #6 | — | W41 | — | 0.5 | OEM-A-1C | — | — | — |
| 23 | Injector #3 | — | W27 | — | 0.5 | OEM-A-1Y | — | — | — |
| 24 | Power Ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | H-Bridge #2 Winding A | — | W33 | — | 0.5 | OEM-A-1W | — | — | — |
| 4 | AUX 6 | — | W39 | — | 0.5 | OEM-D-4K | — | — | — |
| 5 | AUX 3 | — | W36 | — | 0.5 | OEM-D-4F | — | — | — |
| 6 | Injector #4 | — | W28 | — | 0.5 | OEM-A-1AC | — | — | — |
| 7 | Injector #1 | — | W25 | — | 0.5 | OEM-A-1Q | — | — | — |
| 8 | Ignition coil #1 | — | W22 | — | 0.5 | OEM-D-4AF | — | — | — |
| 9 | Ignition coil #3 | — | W24 | — | 0.5 | OEM-D-4AN | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1AA | OMP stepper phase B1 | — | W30 | — | 0.5 | EMUBLACK-Grey-10 | — | — | — |
| 1AB | Sensor ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 1AC | Injector 4 (rear secondary) | — | W28 | — | 0.5 | EMUBLACK-Grey-6 | — | — | — |
| 1AE | OMP stepper phase A1 | — | W31 | — | 0.5 | EMUBLACK-Grey-2 | — | — | — |
| 1AF | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 1AJ | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 1C | Idle speed control (ISC) solenoid | — | W41 | — | 0.5 | EMUBLACK-Grey-22 | — | — | — |
| 1E | Turbo charge control solenoid | — | — | — | — | — | — | — | — |
| 1G | Purge solenoid | — | — | — | — | — | — | — | — |
| 1H | Cooling fan relay (low speed) | — | W34 | — | 0.5 | EMUBLACK-Grey-21 | — | — | — |
| 1I | Turbo charge relief solenoid | — | — | — | — | — | — | — | — |
| 1K | Turbo pre-control solenoid | — | — | — | — | — | — | — | — |
| 1L | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 1M | Turbo control solenoid | — | — | — | — | — | — | — | — |
| 1O | Boost control solenoid | — | — | — | — | — | — | — | — |
| 1Q | Injector 1 (front primary) | — | W25 | — | 0.5 | EMUBLACK-Grey-7 | — | — | — |
| 1S | OMP stepper phase B2 | — | W32 | — | 0.5 | EMUBLACK-Grey-11 | — | — | — |
| 1U | Injector 2 (rear primary) | — | W26 | — | 0.5 | EMUBLACK-Grey-15 | — | — | — |
| 1W | OMP stepper phase A2 | — | W33 | — | 0.5 | EMUBLACK-Grey-3 | — | — | — |
| 1X | Sensor ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 1Y | Injector 3 (front secondary) | — | W27 | — | 0.5 | EMUBLACK-Grey-23 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 3A | +5V sensor supply | — | W18 | — | 0.5 | EMUBLACK-Black-26 | — | — | — |
| 3AB | Sensor ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 3D | O2 sensor (narrowband) | — | W44 | — | 0.5 | EMUBLACK-Black-4 | — | — | — |
| 3G | Fuel pressure regulator control (PRC) solenoid | — | — | — | — | — | — | — | — |
| 3H | OMP position sensor | — | W48 | — | 0.5 | EMUBLACK-Black-17 | — | — | — |
| 3I | Throttle position (TPS, full range) | — | W43 | — | 0.5 | EMUBLACK-Black-18 | — | — | — |
| 3O | Knock sensor | — | W21 | — | 0.5 | EMUBLACK-Black-3 | — | — | — |
| 3R | Crank position (CAS NE) | — | W19 | — | 0.5 | EMUBLACK-Black-8 | — | — | — |
| 3S | Sensor ground (CAS) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 3T | Intake air temperature (IAT) | — | W46 | — | 0.5 | EMUBLACK-Black-5 | — | — | — |
| 3U | Home position (CAS G) | — | W20 | — | 0.5 | EMUBLACK-Black-21 | — | — | — |
| 3V | Fuel temperature | — | W47 | — | 0.5 | EMUBLACK-Black-9 | — | — | — |
| 3W | Coolant temperature (ECT) | — | W45 | — | 0.5 | EMUBLACK-Black-32 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 4A | ECU main power (+12V via main relay/ECR) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 4AA | Brake pedal switch | — | W50 | — | 0.5 | EMUBLACK-Black-10 | — | — | — |
| 4AF | Ignition front trailing | — | W22 | — | 0.5 | EMUBLACK-Grey-8 | — | — | — |
| 4AH | MAP sensor (PIM) | — | W42 | — | 0.5 | EMUBLACK-Black-31 | — | — | — |
| 4AJ | Ignition rear trailing | — | W23 | — | 0.5 | EMUBLACK-Grey-16 | — | — | — |
| 4AN | Ignition leading (wasted spark) | — | W24 | — | 0.5 | EMUBLACK-Grey-9 | — | — | — |
| 4B | Battery constant (+12V) | — | — | — | — | — | — | — | — |
| 4C | Ignition switch / start signal | — | W29 | — | 0.5 | EMUBLACK-Grey-18 | — | — | — |
| 4D | Air pump clutch relay | — | W35 | — | 0.5 | EMUBLACK-Grey-13 | — | — | — |
| 4E | ECU main power (+12V via main relay/ECR) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4F | Fuel pump speed relay | — | W36 | — | 0.5 | EMUBLACK-Grey-5 | — | — | — |
| 4G | Fuel pump relay | — | W37 | — | 0.5 | EMUBLACK-Grey-20 | — | — | — |
| 4I | A/C relay | — | W38 | — | 0.5 | EMUBLACK-Grey-12 | — | — | — |
| 4K | Cooling fan relay (low speed) | — | W39 | — | 0.5 | EMUBLACK-Grey-4 | — | — | — |
| 4L | Cooling fan relay (high speed) | — | W40 | — | 0.5 | EMUBLACK-Grey-14 | — | — | — |
| 4M | Tachometer output | — | — | — | — | — | — | — | — |
| 4Q | Vehicle speed sensor | — | W49 | — | 0.5 | EMUBLACK-Black-20 | — | — | — |
| 4S | Clutch switch | — | W51 | — | 0.5 | EMUBLACK-Black-23 | — | — | — |
| 4V | A/C request | — | W52 | — | 0.5 | EMUBLACK-Black-36 | — | — | — |
| 4W | Power steering pressure switch | — | W53 | — | 0.5 | EMUBLACK-Black-30 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-A-1AB | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-A-1X | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-C-3AB | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-C-3S | — | — | — |
| 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-D-4A | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-D-4E | — | — | — |
| 1 | — | — | W3 | — | 0.85 | EMUBLACK-Black-13 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-A-1AF | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-A-1AJ | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-1L | — | — | — |
| 1 | — | — | W7 | — | 0.85 | EMUBLACK-Black-27 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | EMUBLACK-Black-28 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | EMUBLACK-Grey-17 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | EMUBLACK-Grey-24 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1AA | OMP stepper phase B1 | hbridge_out | EMUBLACK-Grey-10 | H-Bridge #1 Winding B | hbridge_out | single_source | |
| OEM-A-1AB | Sensor ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-1AC | Injector 4 (rear secondary) | injector_out | EMUBLACK-Grey-6 | Injector #4 | injector_out | single_source | |
| OEM-A-1AE | OMP stepper phase A1 | hbridge_out | EMUBLACK-Grey-2 | H-Bridge #1 Winding A | hbridge_out | single_source | |
| OEM-A-1AF | Power ground | 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-1AJ | Power ground | 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-1C | Idle speed control (ISC) solenoid | low_side_out | EMUBLACK-Grey-22 | Injector #6 | injector_out | single_source | |
| OEM-A-1E | Turbo charge control solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1G | Purge solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1H | Cooling fan relay (low speed) | low_side_out | EMUBLACK-Grey-21 | AUX 1 / Injector #7 | low_side_out | single_source | |
| OEM-A-1I | Turbo charge relief solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1K | Turbo pre-control solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1L | Power ground | 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-1M | Turbo control solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1O | Boost control solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1Q | Injector 1 (front primary) | injector_out | EMUBLACK-Grey-7 | Injector #1 | injector_out | single_source | |
| OEM-A-1S | OMP stepper phase B2 | hbridge_out | EMUBLACK-Grey-11 | H-Bridge #2 Winding B | hbridge_out | single_source | |
| OEM-A-1U | Injector 2 (rear primary) | injector_out | EMUBLACK-Grey-15 | Injector #2 | injector_out | single_source | |
| OEM-A-1W | OMP stepper phase A2 | hbridge_out | EMUBLACK-Grey-3 | H-Bridge #2 Winding A | hbridge_out | single_source | |
| OEM-A-1X | Sensor ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-1Y | Injector 3 (front secondary) | injector_out | EMUBLACK-Grey-23 | Injector #3 | injector_out | single_source | |
| OEM-C-3A | +5V sensor supply | vref | EMUBLACK-Black-26 | +5V supply | vref | single_source | |
| OEM-C-3AB | Sensor ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-3D | O2 sensor (narrowband) | lambda_nb_in | EMUBLACK-Black-4 | Analog In #2 | analog_in | single_source | |
| OEM-C-3G | Fuel pressure regulator control (PRC) solenoid | low_side_out | — | — | — | single_source | |
| OEM-C-3H | OMP position sensor | analog_in | EMUBLACK-Black-17 | Analog In #3 | analog_in | single_source | |
| OEM-C-3I | Throttle position (TPS, full range) | analog_in | EMUBLACK-Black-18 | TPS In | analog_in | single_source | |
| OEM-C-3O | Knock sensor | knock_in | EMUBLACK-Black-3 | Knock Sensor in #1 | knock_in | single_source | |
| OEM-C-3R | Crank position (CAS NE) | trigger_in | EMUBLACK-Black-8 | Primary trigger | trigger_in | single_source | |
| OEM-C-3S | Sensor ground (CAS) | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-3T | Intake air temperature (IAT) | temp_in | EMUBLACK-Black-5 | CLT In | temp_in | single_source | |
| OEM-C-3U | Home position (CAS G) | trigger_in | EMUBLACK-Black-21 | Camsync In #1 | trigger_in | single_source | |
| OEM-C-3V | Fuel temperature | temp_in | EMUBLACK-Black-9 | Flex Fuel In | analog_in | single_source | |
| OEM-C-3W | Coolant temperature (ECT) | temp_in | EMUBLACK-Black-32 | IAT In | temp_in | single_source | |
| OEM-D-4A | ECU main power (+12V via main relay/ECR) | power_in | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-D-4AA | Brake pedal switch | digital_in | EMUBLACK-Black-10 | Switch #1 In | digital_in | single_source | |
| OEM-D-4AF | Ignition front trailing | ignition_out | EMUBLACK-Grey-8 | Ignition coil #1 | ignition_out | single_source | |
| OEM-D-4AH | MAP sensor (PIM) | analog_in | EMUBLACK-Black-31 | Analog In #1 | analog_in | single_source | |
| OEM-D-4AJ | Ignition rear trailing | ignition_out | EMUBLACK-Grey-16 | Ignition coil #2 | ignition_out | single_source | |
| OEM-D-4AN | Ignition leading (wasted spark) | ignition_out | EMUBLACK-Grey-9 | Ignition coil #3 | ignition_out | single_source | |
| OEM-D-4B | Battery constant (+12V) | power_in | — | — | — | single_source | |
| OEM-D-4C | Ignition switch / start signal | digital_in | EMUBLACK-Grey-18 | Ignition +12V | digital_in | single_source | |
| OEM-D-4D | Air pump clutch relay | low_side_out | EMUBLACK-Grey-13 | AUX 2 / Injector #8 | low_side_out | single_source | |
| OEM-D-4E | ECU main power (+12V via main relay/ECR) | power_in | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-D-4F | Fuel pump speed relay | low_side_out | EMUBLACK-Grey-5 | AUX 3 | low_side_out | single_source | |
| OEM-D-4G | Fuel pump relay | low_side_out | EMUBLACK-Grey-20 | AUX 4 / Tacho | low_side_out | single_source | |
| OEM-D-4I | A/C relay | low_side_out | EMUBLACK-Grey-12 | AUX 5 | low_side_out | single_source | |
| OEM-D-4K | Cooling fan relay (low speed) | low_side_out | EMUBLACK-Grey-4 | AUX 6 | low_side_out | single_source | |
| OEM-D-4L | Cooling fan relay (high speed) | low_side_out | EMUBLACK-Grey-14 | Injector #5 | injector_out | single_source | |
| OEM-D-4M | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-D-4Q | Vehicle speed sensor | digital_in | EMUBLACK-Black-20 | VSS In | digital_in | single_source | |
| OEM-D-4S | Clutch switch | digital_in | EMUBLACK-Black-23 | Switch #2 In | digital_in | single_source | |
| OEM-D-4V | A/C request | digital_in | EMUBLACK-Black-36 | Switch #3 In | digital_in | single_source | |
| OEM-D-4W | Power steering pressure switch | digital_in | EMUBLACK-Black-30 | Analog In #4 | analog_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-D-4A | SP-14V-1 | 0.85 | no route | ECU main power (+12V via main relay/ECR) | — | |
| W2 | OEM-D-4E | SP-14V-1 | 0.85 | no route | ECU main power (+12V via main relay/ECR) | — | |
| W3 | SP-14V-1 | EMUBLACK-Black-13 | 0.85 | no route | Battery +12V | — | |
| W4 | OEM-A-1AF | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-A-1AJ | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-A-1L | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | SP-GND-1 | EMUBLACK-Black-27 | 0.85 | no route | Power Ground | — | |
| W8 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | no route | Ecu Ground | — | |
| W9 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | no route | Power Ground | — | |
| W10 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | no route | Power Ground | — | |
| W11 | OEM-A-1AB | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W12 | OEM-A-1X | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W13 | OEM-C-3AB | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W14 | OEM-C-3S | SP-0V-1 | 0.5 | no route | Sensor ground (CAS) | — | |
| 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-C-3A | EMUBLACK-Black-26 | 0.5 | no route | +5V sensor supply | — | |
| W19 | OEM-C-3R | EMUBLACK-Black-8 | 0.5 | no route | Crank position (CAS NE) | — | |
| W20 | OEM-C-3U | EMUBLACK-Black-21 | 0.5 | no route | Home position (CAS G) | — | |
| W21 | OEM-C-3O | EMUBLACK-Black-3 | 0.5 | no route | Knock sensor | — | |
| W22 | OEM-D-4AF | EMUBLACK-Grey-8 | 0.5 | no route | Ignition front trailing | — | |
| W23 | OEM-D-4AJ | EMUBLACK-Grey-16 | 0.5 | no route | Ignition rear trailing | — | |
| W24 | OEM-D-4AN | EMUBLACK-Grey-9 | 0.5 | no route | Ignition leading (wasted spark) | — | |
| W25 | OEM-A-1Q | EMUBLACK-Grey-7 | 0.5 | no route | Injector 1 (front primary) | — | |
| W26 | OEM-A-1U | EMUBLACK-Grey-15 | 0.5 | no route | Injector 2 (rear primary) | — | |
| W27 | OEM-A-1Y | EMUBLACK-Grey-23 | 0.5 | no route | Injector 3 (front secondary) | — | |
| W28 | OEM-A-1AC | EMUBLACK-Grey-6 | 0.5 | no route | Injector 4 (rear secondary) | — | |
| W29 | OEM-D-4C | EMUBLACK-Grey-18 | 0.5 | no route | Ignition switch / start signal | — | |
| W30 | OEM-A-1AA | EMUBLACK-Grey-10 | 0.5 | no route | OMP stepper phase B1 | — | |
| W31 | OEM-A-1AE | EMUBLACK-Grey-2 | 0.5 | no route | OMP stepper phase A1 | — | |
| W32 | OEM-A-1S | EMUBLACK-Grey-11 | 0.5 | no route | OMP stepper phase B2 | — | |
| W33 | OEM-A-1W | EMUBLACK-Grey-3 | 0.5 | no route | OMP stepper phase A2 | — | |
| W34 | OEM-A-1H | EMUBLACK-Grey-21 | 0.5 | no route | Cooling fan relay (low speed) | — | |
| W35 | OEM-D-4D | EMUBLACK-Grey-13 | 0.5 | no route | Air pump clutch relay | — | |
| W36 | OEM-D-4F | EMUBLACK-Grey-5 | 0.5 | no route | Fuel pump speed relay | — | |
| W37 | OEM-D-4G | EMUBLACK-Grey-20 | 0.5 | no route | Fuel pump relay | — | |
| W38 | OEM-D-4I | EMUBLACK-Grey-12 | 0.5 | no route | A/C relay | — | |
| W39 | OEM-D-4K | EMUBLACK-Grey-4 | 0.5 | no route | Cooling fan relay (low speed) | — | |
| W40 | OEM-D-4L | EMUBLACK-Grey-14 | 0.5 | no route | Cooling fan relay (high speed) | — | |
| W41 | OEM-A-1C | EMUBLACK-Grey-22 | 0.5 | no route | Idle speed control (ISC) solenoid | — | |
| W42 | OEM-D-4AH | EMUBLACK-Black-31 | 0.5 | no route | MAP sensor (PIM) | — | |
| W43 | OEM-C-3I | EMUBLACK-Black-18 | 0.5 | no route | Throttle position (TPS, full range) | — | |
| W44 | OEM-C-3D | EMUBLACK-Black-4 | 0.5 | no route | O2 sensor (narrowband) | — | |
| W45 | OEM-C-3W | EMUBLACK-Black-32 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W46 | OEM-C-3T | EMUBLACK-Black-5 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W47 | OEM-C-3V | EMUBLACK-Black-9 | 0.5 | no route | Fuel temperature | — | |
| W48 | OEM-C-3H | EMUBLACK-Black-17 | 0.5 | no route | OMP position sensor | — | |
| W49 | OEM-D-4Q | EMUBLACK-Black-20 | 0.5 | no route | Vehicle speed sensor | — | |
| W50 | OEM-D-4AA | EMUBLACK-Black-10 | 0.5 | no route | Brake pedal switch | — | |
| W51 | OEM-D-4S | EMUBLACK-Black-23 | 0.5 | no route | Clutch switch | — | |
| W52 | OEM-D-4V | EMUBLACK-Black-36 | 0.5 | no route | A/C request | — | |
| W53 | OEM-D-4W | EMUBLACK-Black-30 | 0.5 | no route | Power steering pressure 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 (5)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-D-4W ↔ EMUBLACK-Black-30 | OEM-D-4W "Power steering pressure switch" [digital_in] is wired to EMUBLACK-Black-30 "Analog In #4" [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-A-1C ↔ EMUBLACK-Grey-22 | OEM-A-1C "Idle speed control (ISC) solenoid" [low_side_out] is wired to EMUBLACK-Grey-22 "Injector #6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-C-3V ↔ EMUBLACK-Black-9 | OEM-C-3V "Fuel temperature" [temp_in] is wired to EMUBLACK-Black-9 "Flex Fuel In" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-D-4L ↔ EMUBLACK-Grey-14 | OEM-D-4L "Cooling fan relay (high speed)" [low_side_out] is wired to EMUBLACK-Grey-14 "Injector #5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 8 optional OEM pins are not mapped: OEM-A-1E Turbo charge control solenoid; OEM-A-1G Purge solenoid; OEM-A-1I Turbo charge relief solenoid; OEM-A-1K Turbo pre-control solenoid; OEM-A-1M Turbo control solenoid; OEM-A-1O Boost control solenoid; OEM-C-3G Fuel pressure regulator control (PRC) solenoid; OEM-D-4M Tachometer output |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-D-4B | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Fit check: needs add-on. Resolve these before building: - Oil metering pump stepper driver needed; not documented for this ECU - Sequential twin-turbo control needed; not documented for this ECU 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-D 4B: Battery constant (+12V): ECUMASTER EMU Black has no battery-constant input; not needed - OEM-A 1E: Turbo charge control solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-A 1G: Purge solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-A 1I: Turbo charge relief solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-A 1K: Turbo pre-control solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-A 1M: Turbo control solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-A 1O: Boost control solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-C 3G: Fuel pressure regulator control (PRC) solenoid: no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-D 4M: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on ECUMASTER EMU Black
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 |
| 4 | vendor_doc | Haltech: RX7 FD Series 7-8 Nexus PnP adapter pinout (HT-186338) | https://www.haltech.com/wp-admin/admin-ajax.php?action=ht_get_file&id=681af8c0cc78f3b6860e615e&op=1 | — | — | — |
| 2 | forum | defreezemotorsport: MS3 FD3S 16-bit ECU pinout | https://defreezemotorsport.ru/doku.php?id=ms3:fd3s162 | — | — | — |