Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) → Emtron SL8 (auto)
Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) — Emtron — SL8
⚠ 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 | 55 wires · 8 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-D-4A | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-D-4E | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | SL8-A-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | SL8-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-1AF | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-1AJ | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-A-1L | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | SL8-B-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | SL8-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-1AB | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-A-1X | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C-3AB | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-C-3S | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | SL8-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-C-3A | SL8-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-C-3R | SL8-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | SL8-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-3U | SL8-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | SL8-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-3O | SL8-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-D-4AF | SL8-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-D-4AJ | SL8-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-D-4AN | SL8-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-1Q | SL8-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-1U | SL8-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-1Y | SL8-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-1AC | SL8-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-D-4C | SL8-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-1AA | SL8-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-1AE | SL8-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-1H | SL8-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-D-4D | SL8-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-D-4F | SL8-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-D-4G | SL8-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-D-4I | SL8-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-D-4K | SL8-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-D-4L | SL8-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-1C | SL8-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-1E | SL8-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-1G | SL8-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-1I | SL8-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-1K | SL8-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-1M | SL8-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-D-4AH | SL8-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-C-3I | SL8-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-C-3D | SL8-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-C-3W | SL8-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-C-3T | SL8-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-C-3V | SL8-B-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-C-3H | SL8-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-D-4Q | SL8-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-D-4AA | SL8-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-D-4S | SL8-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-D-4V | SL8-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-D-4W | SL8-A-24 | 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 | SL8-B-10 | SL8-A-34 | open (OL) | sensor ground must not touch +12 V supply | |
| 2 | SL8-B-10 | SL8-B-2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | SL8-B-18 | SL8-A-34 | open (OL) | power ground must not touch +12 V supply | |
| 4 | SL8-B-18 | SL8-B-2 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | SL8-B-2 | SL8-A-34 | open (OL) | 5 V sensor reference 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 |
|---|---|---|---|---|---|---|---|---|---|
| 1AA | OMP stepper phase B1 | — | W29 | — | 0.5 | SL8-A-18 | — | — | — |
| 1AB | Sensor ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 1AC | Injector 4 (rear secondary) | — | W27 | — | 0.5 | SL8-A-4 | — | — | — |
| 1AE | OMP stepper phase A1 | — | W30 | — | 0.5 | SL8-A-19 | — | — | — |
| 1AF | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 1AJ | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 1C | Idle speed control (ISC) solenoid | — | W38 | — | 0.5 | SL8-A-12 | — | — | — |
| 1E | Turbo charge control solenoid | — | W39 | — | 0.5 | SL8-A-13 | — | — | — |
| 1G | Purge solenoid | — | W40 | — | 0.5 | SL8-A-5 | — | — | — |
| 1H | Cooling fan relay (low speed) | — | W31 | — | 0.5 | SL8-B-3 | — | — | — |
| 1I | Turbo charge relief solenoid | — | W41 | — | 0.5 | SL8-A-6 | — | — | — |
| 1K | Turbo pre-control solenoid | — | W42 | — | 0.5 | SL8-A-7 | — | — | — |
| 1L | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 1M | Turbo control solenoid | — | W43 | — | 0.5 | SL8-A-8 | — | — | — |
| 1O | Boost control solenoid | — | — | — | — | — | — | — | — |
| 1Q | Injector 1 (front primary) | — | W24 | — | 0.5 | SL8-A-1 | — | — | — |
| 1S | OMP stepper phase B2 | — | — | — | — | — | — | — | — |
| 1U | Injector 2 (rear primary) | — | W25 | — | 0.5 | SL8-A-2 | — | — | — |
| 1W | OMP stepper phase A2 | — | — | — | — | — | — | — | — |
| 1X | Sensor ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 1Y | Injector 3 (front secondary) | — | W26 | — | 0.5 | SL8-A-3 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 3A | +5V sensor supply | — | W15 | — | 0.5 | SL8-B-2 | — | — | — |
| 3AB | Sensor ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 3D | O2 sensor (narrowband) | — | W46 | — | 0.5 | SL8-B-13 | — | — | — |
| 3G | Fuel pressure regulator control (PRC) solenoid | — | — | — | — | — | — | — | — |
| 3H | OMP position sensor | — | W50 | — | 0.5 | SL8-B-20 | — | — | — |
| 3I | Throttle position (TPS, full range) | — | W45 | — | 0.5 | SL8-B-12 | — | — | — |
| 3O | Knock sensor | — | W20 | — | 0.5 | SL8-B-16 | — | — | — |
| 3R | Crank position (CAS NE) | — | W16 | — | 0.5 | SL8-B-5 | — | — | — |
| 3S | Sensor ground (CAS) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 3T | Intake air temperature (IAT) | — | W48 | — | 0.5 | SL8-B-15 | — | — | — |
| 3U | Home position (CAS G) | — | W18 | — | 0.5 | SL8-B-7 | — | — | — |
| 3V | Fuel temperature | — | W49 | — | 0.5 | SL8-B-19 | — | — | — |
| 3W | Coolant temperature (ECT) | — | W47 | — | 0.5 | SL8-B-14 | — | — | — |
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 | — | W52 | — | 0.5 | SL8-A-21 | — | — | — |
| 4AF | Ignition front trailing | — | W21 | — | 0.5 | SL8-A-26 | — | — | — |
| 4AH | MAP sensor (PIM) | — | W44 | — | 0.5 | SL8-B-11 | — | — | — |
| 4AJ | Ignition rear trailing | — | W22 | — | 0.5 | SL8-A-27 | — | — | — |
| 4AN | Ignition leading (wasted spark) | — | W23 | — | 0.5 | SL8-A-28 | — | — | — |
| 4B | Battery constant (+12V) | — | — | — | — | — | — | — | — |
| 4C | Ignition switch / start signal | — | W28 | — | 0.5 | SL8-B-4 | — | — | — |
| 4D | Air pump clutch relay | — | W32 | — | 0.5 | SL8-A-14 | — | — | — |
| 4E | ECU main power (+12V via main relay/ECR) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4F | Fuel pump speed relay | — | W33 | — | 0.5 | SL8-A-15 | — | — | — |
| 4G | Fuel pump relay | — | W34 | — | 0.5 | SL8-A-16 | — | — | — |
| 4I | A/C relay | — | W35 | — | 0.5 | SL8-A-17 | — | — | — |
| 4K | Cooling fan relay (low speed) | — | W36 | — | 0.5 | SL8-A-10 | — | — | — |
| 4L | Cooling fan relay (high speed) | — | W37 | — | 0.5 | SL8-A-11 | — | — | — |
| 4M | Tachometer output | — | — | — | — | — | — | — | — |
| 4Q | Vehicle speed sensor | — | W51 | — | 0.5 | SL8-A-20 | — | — | — |
| 4S | Clutch switch | — | W53 | — | 0.5 | SL8-A-22 | — | — | — |
| 4V | A/C request | — | W54 | — | 0.5 | SL8-A-23 | — | — | — |
| 4W | Power steering pressure switch | — | W55 | — | 0.5 | SL8-A-24 | — | — | — |
SL8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injection channel 1 | — | W24 | — | 0.5 | OEM-A-1Q | — | — | — |
| 2 | Injection channel 2 | — | W25 | — | 0.5 | OEM-A-1U | — | — | — |
| 3 | Injection channel 3 | — | W26 | — | 0.5 | OEM-A-1Y | — | — | — |
| 4 | Injection channel 4 | — | W27 | — | 0.5 | OEM-A-1AC | — | — | — |
| 5 | Injection channel 5 | — | W40 | — | 0.5 | OEM-A-1G | — | — | — |
| 6 | Injection channel 6 | — | W41 | — | 0.5 | OEM-A-1I | — | — | — |
| 7 | Injection channel 7 | — | W42 | — | 0.5 | OEM-A-1K | — | — | — |
| 8 | Injection channel 8 | — | W43 | — | 0.5 | OEM-A-1M | — | — | — |
| 9 | Sensor supply 8V | — | — | — | — | — | — | — | — |
| 10 | Auxiliary output 1 | — | W36 | — | 0.5 | OEM-D-4K | — | — | — |
| 11 | Auxiliary output 2 | — | W37 | — | 0.5 | OEM-D-4L | — | — | — |
| 12 | Auxiliary output 3 | — | W38 | — | 0.5 | OEM-A-1C | — | — | — |
| 13 | Auxiliary output 4 | — | W39 | — | 0.5 | OEM-A-1E | — | — | — |
| 14 | Auxiliary output 5 | — | W32 | — | 0.5 | OEM-D-4D | — | — | — |
| 15 | Auxiliary output 6 | — | W33 | — | 0.5 | OEM-D-4F | — | — | — |
| 16 | Auxiliary output 7 | — | W34 | — | 0.5 | OEM-D-4G | — | — | — |
| 17 | Auxiliary output 8 | — | W35 | — | 0.5 | OEM-D-4I | — | — | — |
| 18 | Auxiliary output 9 | — | W29 | — | 0.5 | OEM-A-1AA | — | — | — |
| 19 | Auxiliary output 10 | — | W30 | — | 0.5 | OEM-A-1AE | — | — | — |
| 20 | Digital input 1 | — | W51 | — | 0.5 | OEM-D-4Q | — | — | — |
| 21 | Digital input 2 | — | W52 | — | 0.5 | OEM-D-4AA | — | — | — |
| 22 | Digital input 3 | — | W53 | — | 0.5 | OEM-D-4S | — | — | — |
| 23 | Digital input 4 | — | W54 | — | 0.5 | OEM-D-4V | — | — | — |
| 24 | Digital input 5 | — | W55 | — | 0.5 | OEM-D-4W | — | — | — |
| 25 | Digital input 6 | — | — | — | — | — | — | — | — |
| 26 | Ignition channel 1 | — | W21 | — | 0.5 | OEM-D-4AF | — | — | — |
| 27 | Ignition channel 2 | — | W22 | — | 0.5 | OEM-D-4AJ | — | — | — |
| 28 | Ignition channel 3 | — | W23 | — | 0.5 | OEM-D-4AN | — | — | — |
| 29 | Ignition channel 4 | — | — | — | — | — | — | — | — |
| 30 | Ignition channel 5 | — | — | — | — | — | — | — | — |
| 31 | Ignition channel 6 | — | — | — | — | — | — | — | — |
| 32 | Ignition channel 7 | — | — | — | — | — | — | — | — |
| 33 | Ignition channel 8 | — | — | — | — | — | — | — | — |
| 34 | Aux 9–10 14V supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
SL8-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU 14V supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Sensor supply Vref1 5.0V | — | W15 | — | 0.5 | OEM-C-3A | — | — | — |
| 3 | EFI relay output (low side, 200 mA) | — | W31 | — | 0.5 | OEM-A-1H | — | — | — |
| 4 | Ignition switch input | — | W28 | — | 0.5 | OEM-D-4C | — | — | — |
| 5 | Crank index sensor + | — | W16 | — | 0.5 | OEM-C-3R | — | — | — |
| 6 | Crank index sensor − | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | Sync sensor + | — | W18 | — | 0.5 | OEM-C-3U | — | — | — |
| 8 | Sync sensor − | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 9 | Shield (crank/sync/knock) | — | — | — | — | — | — | — | — |
| 10 | Analog sensor 0V reference | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | Analog input 1 | — | W44 | — | 0.5 | OEM-D-4AH | — | — | — |
| 12 | Analog input 2 | — | W45 | — | 0.5 | OEM-C-3I | — | — | — |
| 13 | Analog input 3 | — | W46 | — | 0.5 | OEM-C-3D | — | — | — |
| 14 | Analog input 4 | — | W47 | — | 0.5 | OEM-C-3W | — | — | — |
| 15 | Analog input 5 | — | W48 | — | 0.5 | OEM-C-3T | — | — | — |
| 16 | Knock 1 + | — | W20 | — | 0.5 | OEM-C-3O | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | ECU ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 19 | Analog input 6 | — | W49 | — | 0.5 | OEM-C-3V | — | — | — |
| 20 | Analog input 7 (switchable 1k pull-up) | — | W50 | — | 0.5 | OEM-C-3H | — | — | — |
| 21 | Analog input 8 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 22 | Analog input 9 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 23 | Analog input 10 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 24 | Knock 2 + | — | — | — | — | — | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | ECU ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 27 | CAN 1 H | — | — | — | — | — | — | — | — |
| 28 | CAN 1 L | — | — | — | — | — | — | — | — |
| 29 | NC | — | — | — | — | — | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | Ethernet Tx + | — | — | — | — | — | — | — | — |
| 32 | Ethernet Tx − | — | — | — | — | — | — | — | — |
| 33 | Ethernet Rx + | — | — | — | — | — | — | — | — |
| 34 | Ethernet Rx − | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-A-1X | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-A-1AB | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-C-3AB | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-C-3S | — | — | — |
| 1 | — | — | W14 | — | 0.5 | SL8-B-10 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | SL8-B-6 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | SL8-B-8 | — | — | — |
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 | SL8-A-34 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | SL8-B-1 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A-1AF | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-1AJ | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-A-1L | — | — | — |
| 1 | — | — | W8 | — | 0.85 | SL8-B-18 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | SL8-B-26 | — | — | — |
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 | SL8-A-18 | Auxiliary output 9 | hbridge_out | single_source | |
| OEM-A-1AB | Sensor ground | sensor_ground | SL8-B-10 + SL8-B-6 + SL8-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-A-1AC | Injector 4 (rear secondary) | injector_out | SL8-A-4 | Injection channel 4 | injector_out | single_source | |
| OEM-A-1AE | OMP stepper phase A1 | hbridge_out | SL8-A-19 | Auxiliary output 10 | hbridge_out | single_source | |
| OEM-A-1AF | Power ground | ground | SL8-B-18 + SL8-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-A-1AJ | Power ground | ground | SL8-B-18 + SL8-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-A-1C | Idle speed control (ISC) solenoid | low_side_out | SL8-A-12 | Auxiliary output 3 | switch_out | single_source | |
| OEM-A-1E | Turbo charge control solenoid | low_side_out | SL8-A-13 | Auxiliary output 4 | switch_out | single_source | |
| OEM-A-1G | Purge solenoid | low_side_out | SL8-A-5 | Injection channel 5 | injector_out | single_source | |
| OEM-A-1H | Cooling fan relay (low speed) | low_side_out | SL8-B-3 | EFI relay output (low side, 200 mA) | low_side_out | single_source | |
| OEM-A-1I | Turbo charge relief solenoid | low_side_out | SL8-A-6 | Injection channel 6 | injector_out | single_source | |
| OEM-A-1K | Turbo pre-control solenoid | low_side_out | SL8-A-7 | Injection channel 7 | injector_out | single_source | |
| OEM-A-1L | Power ground | ground | SL8-B-18 + SL8-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-A-1M | Turbo control solenoid | low_side_out | SL8-A-8 | Injection channel 8 | injector_out | single_source | |
| OEM-A-1O | Boost control solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-1Q | Injector 1 (front primary) | injector_out | SL8-A-1 | Injection channel 1 | injector_out | single_source | |
| OEM-A-1S | OMP stepper phase B2 | hbridge_out | — | — | — | single_source | |
| OEM-A-1U | Injector 2 (rear primary) | injector_out | SL8-A-2 | Injection channel 2 | injector_out | single_source | |
| OEM-A-1W | OMP stepper phase A2 | hbridge_out | — | — | — | single_source | |
| OEM-A-1X | Sensor ground | sensor_ground | SL8-B-10 + SL8-B-6 + SL8-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-A-1Y | Injector 3 (front secondary) | injector_out | SL8-A-3 | Injection channel 3 | injector_out | single_source | |
| OEM-C-3A | +5V sensor supply | vref | SL8-B-2 | Sensor supply Vref1 5.0V | vref | single_source | |
| OEM-C-3AB | Sensor ground | sensor_ground | SL8-B-10 + SL8-B-6 + SL8-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-C-3D | O2 sensor (narrowband) | lambda_nb_in | SL8-B-13 | Analog input 3 | 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 | SL8-B-20 | Analog input 7 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-C-3I | Throttle position (TPS, full range) | analog_in | SL8-B-12 | Analog input 2 | analog_in | single_source | |
| OEM-C-3O | Knock sensor | knock_in | SL8-B-16 | Knock 1 + | knock_in | single_source | |
| OEM-C-3R | Crank position (CAS NE) | trigger_in | SL8-B-5 | Crank index sensor + | trigger_in | single_source | |
| OEM-C-3S | Sensor ground (CAS) | sensor_ground | SL8-B-10 + SL8-B-6 + SL8-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-C-3T | Intake air temperature (IAT) | temp_in | SL8-B-15 | Analog input 5 | analog_in | single_source | |
| OEM-C-3U | Home position (CAS G) | trigger_in | SL8-B-7 | Sync sensor + | trigger_in | single_source | |
| OEM-C-3V | Fuel temperature | temp_in | SL8-B-19 | Analog input 6 | analog_in | single_source | |
| OEM-C-3W | Coolant temperature (ECT) | temp_in | SL8-B-14 | Analog input 4 | analog_in | single_source | |
| OEM-D-4A | ECU main power (+12V via main relay/ECR) | power_in | SL8-A-34 + SL8-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-D-4AA | Brake pedal switch | digital_in | SL8-A-21 | Digital input 2 | digital_in | single_source | |
| OEM-D-4AF | Ignition front trailing | ignition_out | SL8-A-26 | Ignition channel 1 | ignition_out | single_source | |
| OEM-D-4AH | MAP sensor (PIM) | analog_in | SL8-B-11 | Analog input 1 | analog_in | single_source | |
| OEM-D-4AJ | Ignition rear trailing | ignition_out | SL8-A-27 | Ignition channel 2 | ignition_out | single_source | |
| OEM-D-4AN | Ignition leading (wasted spark) | ignition_out | SL8-A-28 | Ignition channel 3 | ignition_out | single_source | |
| OEM-D-4B | Battery constant (+12V) | power_in | — | — | — | single_source | |
| OEM-D-4C | Ignition switch / start signal | digital_in | SL8-B-4 | Ignition switch input | digital_in | single_source | |
| OEM-D-4D | Air pump clutch relay | low_side_out | SL8-A-14 | Auxiliary output 5 | switch_out | single_source | |
| OEM-D-4E | ECU main power (+12V via main relay/ECR) | power_in | SL8-A-34 + SL8-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-D-4F | Fuel pump speed relay | low_side_out | SL8-A-15 | Auxiliary output 6 | switch_out | single_source | |
| OEM-D-4G | Fuel pump relay | low_side_out | SL8-A-16 | Auxiliary output 7 | switch_out | single_source | |
| OEM-D-4I | A/C relay | low_side_out | SL8-A-17 | Auxiliary output 8 | switch_out | single_source | |
| OEM-D-4K | Cooling fan relay (low speed) | low_side_out | SL8-A-10 | Auxiliary output 1 | switch_out | single_source | |
| OEM-D-4L | Cooling fan relay (high speed) | low_side_out | SL8-A-11 | Auxiliary output 2 | switch_out | single_source | |
| OEM-D-4M | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-D-4Q | Vehicle speed sensor | digital_in | SL8-A-20 | Digital input 1 | digital_in | single_source | |
| OEM-D-4S | Clutch switch | digital_in | SL8-A-22 | Digital input 3 | digital_in | single_source | |
| OEM-D-4V | A/C request | digital_in | SL8-A-23 | Digital input 4 | digital_in | single_source | |
| OEM-D-4W | Power steering pressure switch | digital_in | SL8-A-24 | Digital input 5 | digital_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 | SL8-A-34 | 0.85 | no route | Aux 9–10 14V supply | — | |
| W4 | SP-14V-1 | SL8-B-1 | 0.85 | no route | ECU 14V supply | — | |
| W5 | OEM-A-1AF | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-A-1AJ | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-A-1L | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | SP-GND-1 | SL8-B-18 | 0.85 | no route | ECU ground | — | |
| W9 | SP-GND-1 | SL8-B-26 | 0.85 | no route | ECU ground | — | |
| W10 | OEM-A-1AB | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W11 | OEM-A-1X | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W12 | OEM-C-3AB | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W13 | OEM-C-3S | SP-0V-1 | 0.5 | no route | Sensor ground (CAS) | — | |
| W14 | SP-0V-1 | SL8-B-10 | 0.5 | no route | Analog sensor 0V reference | — | |
| W15 | OEM-C-3A | SL8-B-2 | 0.5 | no route | +5V sensor supply | — | |
| W16 | OEM-C-3R | SL8-B-5 | 0.5 | no route | Crank position (CAS NE) | — | |
| W17 | SP-0V-1 | SL8-B-6 | 0.5 | no route | Crank index sensor − | — | |
| W18 | OEM-C-3U | SL8-B-7 | 0.5 | no route | Home position (CAS G) | — | |
| W19 | SP-0V-1 | SL8-B-8 | 0.5 | no route | Sync sensor − | — | |
| W20 | OEM-C-3O | SL8-B-16 | 0.5 | no route | Knock sensor | — | |
| W21 | OEM-D-4AF | SL8-A-26 | 0.5 | no route | Ignition front trailing | — | |
| W22 | OEM-D-4AJ | SL8-A-27 | 0.5 | no route | Ignition rear trailing | — | |
| W23 | OEM-D-4AN | SL8-A-28 | 0.5 | no route | Ignition leading (wasted spark) | — | |
| W24 | OEM-A-1Q | SL8-A-1 | 0.5 | no route | Injector 1 (front primary) | — | |
| W25 | OEM-A-1U | SL8-A-2 | 0.5 | no route | Injector 2 (rear primary) | — | |
| W26 | OEM-A-1Y | SL8-A-3 | 0.5 | no route | Injector 3 (front secondary) | — | |
| W27 | OEM-A-1AC | SL8-A-4 | 0.5 | no route | Injector 4 (rear secondary) | — | |
| W28 | OEM-D-4C | SL8-B-4 | 0.5 | no route | Ignition switch / start signal | — | |
| W29 | OEM-A-1AA | SL8-A-18 | 0.5 | no route | OMP stepper phase B1 | — | |
| W30 | OEM-A-1AE | SL8-A-19 | 0.5 | no route | OMP stepper phase A1 | — | |
| W31 | OEM-A-1H | SL8-B-3 | 0.5 | no route | Cooling fan relay (low speed) | — | |
| W32 | OEM-D-4D | SL8-A-14 | 0.5 | no route | Air pump clutch relay | — | |
| W33 | OEM-D-4F | SL8-A-15 | 0.5 | no route | Fuel pump speed relay | — | |
| W34 | OEM-D-4G | SL8-A-16 | 0.5 | no route | Fuel pump relay | — | |
| W35 | OEM-D-4I | SL8-A-17 | 0.5 | no route | A/C relay | — | |
| W36 | OEM-D-4K | SL8-A-10 | 0.5 | no route | Cooling fan relay (low speed) | — | |
| W37 | OEM-D-4L | SL8-A-11 | 0.5 | no route | Cooling fan relay (high speed) | — | |
| W38 | OEM-A-1C | SL8-A-12 | 0.5 | no route | Idle speed control (ISC) solenoid | — | |
| W39 | OEM-A-1E | SL8-A-13 | 0.5 | no route | Turbo charge control solenoid | — | |
| W40 | OEM-A-1G | SL8-A-5 | 0.5 | no route | Purge solenoid | — | |
| W41 | OEM-A-1I | SL8-A-6 | 0.5 | no route | Turbo charge relief solenoid | — | |
| W42 | OEM-A-1K | SL8-A-7 | 0.5 | no route | Turbo pre-control solenoid | — | |
| W43 | OEM-A-1M | SL8-A-8 | 0.5 | no route | Turbo control solenoid | — | |
| W44 | OEM-D-4AH | SL8-B-11 | 0.5 | no route | MAP sensor (PIM) | — | |
| W45 | OEM-C-3I | SL8-B-12 | 0.5 | no route | Throttle position (TPS, full range) | — | |
| W46 | OEM-C-3D | SL8-B-13 | 0.5 | no route | O2 sensor (narrowband) | — | |
| W47 | OEM-C-3W | SL8-B-14 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W48 | OEM-C-3T | SL8-B-15 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W49 | OEM-C-3V | SL8-B-19 | 0.5 | no route | Fuel temperature | — | |
| W50 | OEM-C-3H | SL8-B-20 | 0.5 | no route | OMP position sensor | — | |
| W51 | OEM-D-4Q | SL8-A-20 | 0.5 | no route | Vehicle speed sensor | — | |
| W52 | OEM-D-4AA | SL8-A-21 | 0.5 | no route | Brake pedal switch | — | |
| W53 | OEM-D-4S | SL8-A-22 | 0.5 | no route | Clutch switch | — | |
| W54 | OEM-D-4V | SL8-A-23 | 0.5 | no route | A/C request | — | |
| W55 | OEM-D-4W | SL8-A-24 | 0.5 | no route | Power steering pressure switch | — |
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) | 46.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (17)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | OEM-A-1AB ↔ SL8-B-8 | OEM-A-1AB "Sensor ground" [sensor_ground] is wired to SL8-B-8 "Sync sensor −" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-A-1C ↔ SL8-A-12 | OEM-A-1C "Idle speed control (ISC) solenoid" [low_side_out] is wired to SL8-A-12 "Auxiliary output 3" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-1E ↔ SL8-A-13 | OEM-A-1E "Turbo charge control solenoid" [low_side_out] is wired to SL8-A-13 "Auxiliary output 4" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-1G ↔ SL8-A-5 | OEM-A-1G "Purge solenoid" [low_side_out] is wired to SL8-A-5 "Injection channel 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-A-1I ↔ SL8-A-6 | OEM-A-1I "Turbo charge relief solenoid" [low_side_out] is wired to SL8-A-6 "Injection channel 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-A-1K ↔ SL8-A-7 | OEM-A-1K "Turbo pre-control solenoid" [low_side_out] is wired to SL8-A-7 "Injection channel 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-A-1M ↔ SL8-A-8 | OEM-A-1M "Turbo control solenoid" [low_side_out] is wired to SL8-A-8 "Injection channel 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-C-3T ↔ SL8-B-15 | OEM-C-3T "Intake air temperature (IAT)" [temp_in] is wired to SL8-B-15 "Analog input 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-C-3V ↔ SL8-B-19 | OEM-C-3V "Fuel temperature" [temp_in] is wired to SL8-B-19 "Analog input 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-C-3W ↔ SL8-B-14 | OEM-C-3W "Coolant temperature (ECT)" [temp_in] is wired to SL8-B-14 "Analog input 4" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-D-4D ↔ SL8-A-14 | OEM-D-4D "Air pump clutch relay" [low_side_out] is wired to SL8-A-14 "Auxiliary output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-D-4F ↔ SL8-A-15 | OEM-D-4F "Fuel pump speed relay" [low_side_out] is wired to SL8-A-15 "Auxiliary output 6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-D-4G ↔ SL8-A-16 | OEM-D-4G "Fuel pump relay" [low_side_out] is wired to SL8-A-16 "Auxiliary output 7" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-D-4I ↔ SL8-A-17 | OEM-D-4I "A/C relay" [low_side_out] is wired to SL8-A-17 "Auxiliary output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-D-4K ↔ SL8-A-10 | OEM-D-4K "Cooling fan relay (low speed)" [low_side_out] is wired to SL8-A-10 "Auxiliary output 1" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-D-4L ↔ SL8-A-11 | OEM-D-4L "Cooling fan relay (high speed)" [low_side_out] is wired to SL8-A-11 "Auxiliary output 2" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 5 optional OEM pins are not mapped: OEM-A-1O Boost control solenoid; OEM-A-1S OMP stepper phase B2; OEM-A-1W OMP stepper phase A2; 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 - Trigger pattern for Mazda 13B-REW not found in the ECU's docs (Ignition modes support Direct Trailing Spark; trigger decode is generic, no rotary-specific preset documented.) 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): Emtron SL8 has no battery-constant input; not needed - SL8-B 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-A 1S: OMP stepper phase B2: no free hbridge on Emtron SL8 - OEM-A 1W: OMP stepper phase A2: no free hbridge on Emtron SL8 - OEM-A 1O: Boost control solenoid: no free low_side/ls_hs/injector/hbridge on Emtron SL8 - OEM-C 3G: Fuel pressure regulator control (PRC) solenoid: no free low_side/ls_hs/injector/hbridge on Emtron SL8 - OEM-D 4M: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on Emtron SL8
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Emtron SL4/SL6/SL8 ECU datasheets | https://docs.emtronaustralia.com.au/engine-management/datasheets/index.html | archive | 2026-10-05 | 1e22846cec94 |
| 4 | vendor_doc | Emtron SL4/SL6/SL8 pinout pages | https://docs.emtronaustralia.com.au/engine-management/wiring/index.html | archive | 2026-10-05 | e52b3da9996a |
| 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 | — | — | — |