Mazda RX-7 FC 1986-92 (13B-T Turbo II) → ECUMASTER EMU Black (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — ECUMASTER — EMU Black
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-08
Before you start
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 50 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-3-I | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | EMUBLACK-Black-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-2-R | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-G | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | SP-GND-1 | EMUBLACK-Black-27 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-1-P | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-1-Q | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | EMUBLACK-Black-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-2-A | EMUBLACK-Black-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-1-T | EMUBLACK-Black-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-1-N | EMUBLACK-Black-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-1-R | EMUBLACK-Black-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-1-U | EMUBLACK-Grey-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-1-V | EMUBLACK-Grey-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-1-X | EMUBLACK-Grey-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-3-E | EMUBLACK-Grey-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-H | EMUBLACK-Grey-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-3-C | EMUBLACK-Grey-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-F | EMUBLACK-Grey-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-1-F | EMUBLACK-Grey-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-3-D | EMUBLACK-Grey-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-1-C | EMUBLACK-Grey-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-1-S | EMUBLACK-Grey-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-K | EMUBLACK-Grey-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-M | EMUBLACK-Grey-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-N | EMUBLACK-Grey-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-O | EMUBLACK-Grey-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-2-P | EMUBLACK-Grey-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-2-Q | EMUBLACK-Grey-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-2-E | EMUBLACK-Black-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-B | EMUBLACK-Black-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-G | EMUBLACK-Black-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-D | EMUBLACK-Black-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-I | EMUBLACK-Black-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-J | EMUBLACK-Black-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-2-L | EMUBLACK-Black-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-F | EMUBLACK-Black-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-2-H | EMUBLACK-Black-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-1-O | EMUBLACK-Black-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-1-E | EMUBLACK-Black-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-1-G | EMUBLACK-Black-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-1-H | EMUBLACK-Black-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-1-L | EMUBLACK-Black-9 | 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-27 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | EMUBLACK-Black-26 | EMUBLACK-Black-13 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 3 | EMUBLACK-Black-27 | EMUBLACK-Black-13 | open (OL) | power ground must not touch +12 V supply | |
| 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 |
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 | — | W47 | — | 0.5 | OEM-1-E | — | — | — |
| 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 | — | W40 | — | 0.5 | OEM-2-D | — | — | — |
| 18 | TPS In | — | W39 | — | 0.5 | OEM-2-G | — | — | — |
| 19 | WBO Ip | — | — | — | — | — | — | — | — |
| 2 | EGT in #1 | — | — | — | — | — | — | — | — |
| 20 | VSS In | — | W46 | — | 0.5 | OEM-1-O | — | — | — |
| 21 | Camsync In #1 | — | W18 | — | 0.5 | OEM-1-N | — | — | — |
| 22 | WBO Rcal | — | — | — | — | — | — | — | — |
| 23 | Switch #2 In | — | W48 | — | 0.5 | OEM-1-G | — | — | — |
| 24 | RS232 RXD | — | — | — | — | — | — | — | — |
| 25 | CAN L | — | — | — | — | — | — | — | — |
| 26 | +5V supply | — | W16 | — | 0.5 | OEM-2-A | — | — | — |
| 27 | Power Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 28 | Ecu Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 29 | Sensor Ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock Sensor in #1 | — | W19 | — | 0.5 | OEM-1-R | — | — | — |
| 30 | Analog In #4 | — | W43 | — | 0.5 | OEM-2-L | — | — | — |
| 31 | Analog In #1 | — | W37 | — | 0.5 | OEM-2-E | — | — | — |
| 32 | IAT In | — | W41 | — | 0.5 | OEM-2-I | — | — | — |
| 33 | WBO VGND | — | — | — | — | — | — | — | — |
| 34 | +5V supply | — | — | — | — | — | — | — | — |
| 35 | Analog In #5 | — | W44 | — | 0.5 | OEM-2-F | — | — | — |
| 36 | Switch #3 In | — | W49 | — | 0.5 | OEM-1-H | — | — | — |
| 37 | Analog In #6 | — | W45 | — | 0.5 | OEM-2-H | — | — | — |
| 38 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 39 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 4 | Analog In #2 | — | W38 | — | 0.5 | OEM-2-B | — | — | — |
| 5 | CLT In | — | W42 | — | 0.5 | OEM-2-J | — | — | — |
| 6 | WBO Vs | — | — | — | — | — | — | — | — |
| 7 | Camsync In #2 | — | — | — | — | — | — | — | — |
| 8 | Primary trigger | — | W17 | — | 0.5 | OEM-1-T | — | — | — |
| 9 | Flex Fuel In | — | W50 | — | 0.5 | OEM-1-L | — | — | — |
EMUBLACK-Grey
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil #6 | — | — | — | — | — | — | — | — |
| 10 | H-Bridge #1 Winding B | — | W35 | — | 0.5 | OEM-2-P | — | — | — |
| 11 | H-Bridge #2 Winding B | — | — | — | — | — | — | — | — |
| 12 | AUX 5 | — | W31 | — | 0.5 | OEM-2-K | — | — | — |
| 13 | AUX 2 / Injector #8 | — | W28 | — | 0.5 | OEM-3-D | — | — | — |
| 14 | Injector #5 | — | W33 | — | 0.5 | OEM-2-N | — | — | — |
| 15 | Injector #2 | — | W24 | — | 0.5 | OEM-3-H | — | — | — |
| 16 | Ignition coil #2 | — | W21 | — | 0.5 | OEM-1-V | — | — | — |
| 17 | Power Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Ignition +12V | — | — | — | — | — | — | — | — |
| 19 | WBO Heater | — | — | — | — | — | — | — | — |
| 2 | H-Bridge #1 Winding A | — | W36 | — | 0.5 | OEM-2-Q | — | — | — |
| 20 | AUX 4 / Tacho | — | W30 | — | 0.5 | OEM-1-S | — | — | — |
| 21 | AUX 1 / Injector #7 | — | W27 | — | 0.5 | OEM-1-F | — | — | — |
| 22 | Injector #6 | — | W34 | — | 0.5 | OEM-2-O | — | — | — |
| 23 | Injector #3 | — | W25 | — | 0.5 | OEM-3-C | — | — | — |
| 24 | Power Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | H-Bridge #2 Winding A | — | — | — | — | — | — | — | — |
| 4 | AUX 6 | — | W32 | — | 0.5 | OEM-2-M | — | — | — |
| 5 | AUX 3 | — | W29 | — | 0.5 | OEM-1-C | — | — | — |
| 6 | Injector #4 | — | W26 | — | 0.5 | OEM-3-F | — | — | — |
| 7 | Injector #1 | — | W23 | — | 0.5 | OEM-3-E | — | — | — |
| 8 | Ignition coil #1 | — | W20 | — | 0.5 | OEM-1-U | — | — | — |
| 9 | Ignition coil #3 | — | W22 | — | 0.5 | OEM-1-X | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W29 | — | 0.5 | EMUBLACK-Grey-5 | — | — | — |
| E | A/C request | — | W47 | — | 0.5 | EMUBLACK-Black-10 | — | — | — |
| F | A/C clutch relay | — | W27 | — | 0.5 | EMUBLACK-Grey-21 | — | — | — |
| G | Neutral switch | — | W48 | — | 0.5 | EMUBLACK-Black-23 | — | — | — |
| H | Water temperature switch | — | W49 | — | 0.5 | EMUBLACK-Black-36 | — | — | — |
| L | Clutch switch | — | W50 | — | 0.5 | EMUBLACK-Black-9 | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W18 | — | 0.5 | EMUBLACK-Black-21 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W46 | — | 0.5 | EMUBLACK-Black-20 | — | — | — |
| P | CAS ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | W19 | — | 0.5 | EMUBLACK-Black-3 | — | — | — |
| S | Port air valve | — | W30 | — | 0.5 | EMUBLACK-Grey-20 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W17 | — | 0.5 | EMUBLACK-Black-8 | — | — | — |
| U | Ignition select (trailing rotor) | — | W20 | — | 0.5 | EMUBLACK-Grey-8 | — | — | — |
| V | Ignition leading | — | W21 | — | 0.5 | EMUBLACK-Grey-16 | — | — | — |
| X | Ignition trailing | — | W22 | — | 0.5 | EMUBLACK-Grey-9 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W16 | — | 0.5 | EMUBLACK-Black-26 | — | — | — |
| B | MAP (pressure) signal | — | W38 | — | 0.5 | EMUBLACK-Black-4 | — | — | — |
| C | Sensor ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | W40 | — | 0.5 | EMUBLACK-Black-17 | — | — | — |
| E | Airflow signal (AFM) | — | W37 | — | 0.5 | EMUBLACK-Black-31 | — | — | — |
| F | Variable resistor (tuning) | — | W44 | — | 0.5 | EMUBLACK-Black-35 | — | — | — |
| G | Throttle position (TPS) | — | W39 | — | 0.5 | EMUBLACK-Black-18 | — | — | — |
| H | Atmospheric pressure (ATP) | — | W45 | — | 0.5 | EMUBLACK-Black-37 | — | — | — |
| I | Coolant temperature (ECT) | — | W41 | — | 0.5 | EMUBLACK-Black-32 | — | — | — |
| J | Inlet air temperature (IAT) | — | W42 | — | 0.5 | EMUBLACK-Black-5 | — | — | — |
| K | Turbo control valve (boost) | — | W31 | — | 0.5 | EMUBLACK-Grey-12 | — | — | — |
| L | Manifold air temperature (MAT) | — | W43 | — | 0.5 | EMUBLACK-Black-30 | — | — | — |
| M | Pressure regulator control valve | — | W32 | — | 0.5 | EMUBLACK-Grey-4 | — | — | — |
| N | EGR valve | — | W33 | — | 0.5 | EMUBLACK-Grey-14 | — | — | — |
| O | Switching valve | — | W34 | — | 0.5 | EMUBLACK-Grey-22 | — | — | — |
| P | Relief valve | — | W35 | — | 0.5 | EMUBLACK-Grey-10 | — | — | — |
| Q | Idle control (BAC) | — | W36 | — | 0.5 | EMUBLACK-Grey-2 | — | — | — |
| R | Power ground | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Starter input | — | — | — | — | — | — | — | — |
| C | Primary injector 2 | — | W25 | — | 0.5 | EMUBLACK-Grey-23 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W28 | — | 0.5 | EMUBLACK-Grey-13 | — | — | — |
| E | Primary injector 1 | — | W23 | — | 0.5 | EMUBLACK-Grey-7 | — | — | — |
| F | Secondary injector 2 | — | W26 | — | 0.5 | EMUBLACK-Grey-6 | — | — | — |
| G | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W24 | — | 0.5 | EMUBLACK-Grey-15 | — | — | — |
| I | Ignition power (+12V via main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| J | Battery constant (+12V) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-1-P | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-1-Q | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W13 | — | 0.5 | EMUBLACK-Black-29 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | EMUBLACK-Black-38 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | EMUBLACK-Black-39 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 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-2-R | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-3-G | — | — | — |
| 1 | — | — | W6 | — | 0.85 | EMUBLACK-Black-27 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | EMUBLACK-Black-28 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | EMUBLACK-Grey-17 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | EMUBLACK-Grey-24 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-C | Air bypass solenoid | low_side_out | EMUBLACK-Grey-5 | AUX 3 | low_side_out | single_source | |
| OEM-1-E | A/C request | digital_in | EMUBLACK-Black-10 | Switch #1 In | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | EMUBLACK-Grey-21 | AUX 1 / Injector #7 | low_side_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | EMUBLACK-Black-23 | Switch #2 In | digital_in | corroborated | |
| OEM-1-H | Water temperature switch | digital_in | EMUBLACK-Black-36 | Switch #3 In | digital_in | corroborated | |
| OEM-1-L | Clutch switch | digital_in | EMUBLACK-Black-9 | Flex Fuel In | analog_in | single_source | |
| OEM-1-M | Ignition feedback (tacho) | tacho_out | — | — | — | single_source | |
| OEM-1-N | CAS 2-tooth (G, cam) | trigger_in | EMUBLACK-Black-21 | Camsync In #1 | trigger_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | EMUBLACK-Black-20 | VSS In | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-1-R | Knock input | knock_in | EMUBLACK-Black-3 | Knock Sensor in #1 | knock_in | corroborated | |
| OEM-1-S | Port air valve | low_side_out | EMUBLACK-Grey-20 | AUX 4 / Tacho | low_side_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | EMUBLACK-Black-8 | Primary trigger | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | EMUBLACK-Grey-8 | Ignition coil #1 | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | EMUBLACK-Grey-16 | Ignition coil #2 | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | EMUBLACK-Grey-9 | Ignition coil #3 | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | EMUBLACK-Black-26 | +5V supply | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | EMUBLACK-Black-4 | Analog In #2 | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | EMUBLACK-Black-17 | Analog In #3 | analog_in | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | EMUBLACK-Black-31 | Analog In #1 | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | EMUBLACK-Black-35 | Analog In #5 | analog_in | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | EMUBLACK-Black-18 | TPS In | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | EMUBLACK-Black-37 | Analog In #6 | analog_in | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | EMUBLACK-Black-32 | IAT In | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | EMUBLACK-Black-5 | CLT In | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | EMUBLACK-Grey-12 | AUX 5 | low_side_out | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | EMUBLACK-Black-30 | Analog In #4 | analog_in | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | EMUBLACK-Grey-4 | AUX 6 | low_side_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | EMUBLACK-Grey-14 | Injector #5 | injector_out | single_source | |
| OEM-2-O | Switching valve | low_side_out | EMUBLACK-Grey-22 | Injector #6 | injector_out | single_source | |
| OEM-2-P | Relief valve | low_side_out | EMUBLACK-Grey-10 | H-Bridge #1 Winding B | hbridge_out | single_source | |
| OEM-2-Q | Idle control (BAC) | low_side_out | EMUBLACK-Grey-2 | H-Bridge #1 Winding A | hbridge_out | single_source | |
| OEM-2-R | 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-3-A | 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-3-B | Starter input | digital_in | — | — | — | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | EMUBLACK-Grey-23 | Injector #3 | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | EMUBLACK-Grey-13 | AUX 2 / Injector #8 | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | EMUBLACK-Grey-7 | Injector #1 | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | EMUBLACK-Grey-6 | Injector #4 | injector_out | single_source | |
| OEM-3-G | 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-3-H | Secondary injector 1 | injector_out | EMUBLACK-Grey-15 | Injector #2 | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-3-J | Battery constant (+12V) | power_in | — | — | — | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-3-I | SP-14V-1 | 0.85 | no route | Ignition power (+12V via main relay) | — | |
| W2 | SP-14V-1 | EMUBLACK-Black-13 | 0.85 | no route | Battery +12V | — | |
| W3 | OEM-2-R | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-3-G | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | SP-GND-1 | EMUBLACK-Black-27 | 0.85 | no route | Power Ground | — | |
| W7 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | no route | Ecu Ground | — | |
| W8 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | no route | Power Ground | — | |
| W9 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | no route | Power Ground | — | |
| W10 | OEM-1-P | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W11 | OEM-1-Q | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W12 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W13 | SP-0V-1 | EMUBLACK-Black-29 | 0.5 | no route | Sensor Ground | — | |
| W14 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | no route | Sensor Ground | — | |
| W15 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | no route | Sensor Ground | — | |
| W16 | OEM-2-A | EMUBLACK-Black-26 | 0.5 | no route | 5V sensor supply | — | |
| W17 | OEM-1-T | EMUBLACK-Black-8 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W18 | OEM-1-N | EMUBLACK-Black-21 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W19 | OEM-1-R | EMUBLACK-Black-3 | 0.5 | no route | Knock input | — | |
| W20 | OEM-1-U | EMUBLACK-Grey-8 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W21 | OEM-1-V | EMUBLACK-Grey-16 | 0.5 | no route | Ignition leading | — | |
| W22 | OEM-1-X | EMUBLACK-Grey-9 | 0.5 | no route | Ignition trailing | — | |
| W23 | OEM-3-E | EMUBLACK-Grey-7 | 0.5 | no route | Primary injector 1 | — | |
| W24 | OEM-3-H | EMUBLACK-Grey-15 | 0.5 | no route | Secondary injector 1 | — | |
| W25 | OEM-3-C | EMUBLACK-Grey-23 | 0.5 | no route | Primary injector 2 | — | |
| W26 | OEM-3-F | EMUBLACK-Grey-6 | 0.5 | no route | Secondary injector 2 | — | |
| W27 | OEM-1-F | EMUBLACK-Grey-21 | 0.5 | no route | A/C clutch relay | — | |
| W28 | OEM-3-D | EMUBLACK-Grey-13 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W29 | OEM-1-C | EMUBLACK-Grey-5 | 0.5 | no route | Air bypass solenoid | — | |
| W30 | OEM-1-S | EMUBLACK-Grey-20 | 0.5 | no route | Port air valve | — | |
| W31 | OEM-2-K | EMUBLACK-Grey-12 | 0.5 | no route | Turbo control valve (boost) | — | |
| W32 | OEM-2-M | EMUBLACK-Grey-4 | 0.5 | no route | Pressure regulator control valve | — | |
| W33 | OEM-2-N | EMUBLACK-Grey-14 | 0.5 | no route | EGR valve | — | |
| W34 | OEM-2-O | EMUBLACK-Grey-22 | 0.5 | no route | Switching valve | — | |
| W35 | OEM-2-P | EMUBLACK-Grey-10 | 0.5 | no route | Relief valve | — | |
| W36 | OEM-2-Q | EMUBLACK-Grey-2 | 0.5 | no route | Idle control (BAC) | — | |
| W37 | OEM-2-E | EMUBLACK-Black-31 | 0.5 | no route | Airflow signal (AFM) | — | |
| W38 | OEM-2-B | EMUBLACK-Black-4 | 0.5 | no route | MAP (pressure) signal | — | |
| W39 | OEM-2-G | EMUBLACK-Black-18 | 0.5 | no route | Throttle position (TPS) | — | |
| W40 | OEM-2-D | EMUBLACK-Black-17 | 0.5 | no route | O2 sensor signal | — | |
| W41 | OEM-2-I | EMUBLACK-Black-32 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W42 | OEM-2-J | EMUBLACK-Black-5 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W43 | OEM-2-L | EMUBLACK-Black-30 | 0.5 | no route | Manifold air temperature (MAT) | — | |
| W44 | OEM-2-F | EMUBLACK-Black-35 | 0.5 | no route | Variable resistor (tuning) | — | |
| W45 | OEM-2-H | EMUBLACK-Black-37 | 0.5 | no route | Atmospheric pressure (ATP) | — | |
| W46 | OEM-1-O | EMUBLACK-Black-20 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W47 | OEM-1-E | EMUBLACK-Black-10 | 0.5 | no route | A/C request | — | |
| W48 | OEM-1-G | EMUBLACK-Black-23 | 0.5 | no route | Neutral switch | — | |
| W49 | OEM-1-H | EMUBLACK-Black-36 | 0.5 | no route | Water temperature switch | — | |
| W50 | OEM-1-L | EMUBLACK-Black-9 | 0.5 | no route | Clutch switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (7)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-1-L ↔ EMUBLACK-Black-9 | OEM-1-L "Clutch switch" [digital_in] is wired to EMUBLACK-Black-9 "Flex Fuel In" [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. |
| warn | NET_FAMILY | OEM-2-P ↔ EMUBLACK-Grey-10 | OEM-2-P "Relief valve" [low_side_out] is wired to EMUBLACK-Grey-10 "H-Bridge #1 Winding B" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-2-Q ↔ EMUBLACK-Grey-2 | OEM-2-Q "Idle control (BAC)" [low_side_out] is wired to EMUBLACK-Grey-2 "H-Bridge #1 Winding A" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | NET_FAMILY | OEM-2-L ↔ EMUBLACK-Black-30 | OEM-2-L "Manifold air temperature (MAT)" [temp_in] is wired to EMUBLACK-Black-30 "Analog In #4" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-N ↔ EMUBLACK-Grey-14 | OEM-2-N "EGR valve" [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 | NET_FAMILY | OEM-2-O ↔ EMUBLACK-Grey-22 | OEM-2-O "Switching valve" [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 | UNMAPPED | OEM | 2 optional OEM pins are not mapped: OEM-1-M Ignition feedback (tacho); OEM-3-B Starter input |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-3-J | 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 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-3 J: Battery constant (+12V): ECUMASTER EMU Black has no battery-constant input; not needed - OEM-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on ECUMASTER EMU Black - OEM-3 B: Starter input: no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - EMUBLACK-Grey 18: Ignition +12V: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Adaptronic: Select RX7 Series 4 FC Turbo plug-in pinout | https://www.rx7club.com/attachments/adaptronic-engine-mgmt-aus-311/543323d1411579751-need-pin-out-diagram-s5-pnp-rx7_s4_sel_pinout.pdf | — | — | — |
| 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 | forum | MSExtra: FC3S CAS wiring (NE/G) | https://www.msextra.com/forums/viewtopic.php?p=279694 | — | — | — |
| 2 | forum | NoPistons: S4 Turbo II main harness wiring (ECU plug, colours only) | https://www.nopistons.com/1st-generation-specific-16/thinking-putting-89-13bt-sa22-66354/page2/ | — | — | — |