Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) → MoTeC M170 13170 (auto)
Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) — MoTeC — M170
⚠ 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 · 7 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 | M170-A-23 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | M170-A-32 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-14V-1 | M170-A-41 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-D-4B | M170-A-54 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-A-1AF | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-A-1AJ | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-A-1L | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | M170-A-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | M170-A-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | M170-A-19 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | M170-A-20 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-GND-1 | M170-A-21 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-1AB | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A-1X | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C-3AB | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-3S | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | M170-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | M170-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-3A | M170-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-3R | M170-A-49 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-3U | M170-A-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-3O | M170-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-4AF | M170-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-D-4AJ | M170-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-D-4AN | M170-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-1Q | M170-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-1U | M170-A-43 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-1Y | M170-A-50 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-1AC | M170-A-51 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-1AA | M170-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-1AE | M170-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-1S | M170-A-59 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-1W | M170-A-65 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-1H | M170-A-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-D-4D | M170-A-66 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-D-4F | M170-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-D-4G | M170-A-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-D-4I | M170-A-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-D-4K | M170-A-62 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-D-4L | M170-A-58 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-1C | M170-A-64 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-D-4AH | M170-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-C-3I | M170-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-C-3D | M170-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-C-3W | M170-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-C-3T | M170-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-C-3V | M170-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-C-3H | M170-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-D-4Q | M170-A-46 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-D-4AA | M170-A-45 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-D-4S | M170-A-52 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-D-4V | M170-A-53 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-D-4W | M170-A-13 | 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 | M170-A-11 | M170-A-16 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 2 | M170-A-11 | M170-A-23 | open (OL) | sensor ground must not touch +12 V supply | |
| 3 | M170-A-11 | M170-A-54 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | M170-A-14 | M170-A-16 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | M170-A-14 | M170-A-23 | open (OL) | power ground must not touch +12 V supply | |
| 6 | M170-A-14 | M170-A-54 | open (OL) | power ground must not touch +12 V supply | |
| 7 | M170-A-16 | M170-A-23 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 8 | M170-A-16 | M170-A-54 | 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
M170-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Low Side Ignition 1 | — | W25 | — | 0.5 | OEM-D-4AF | — | — | — |
| 10 | Low Side Ignition 4 | — | — | — | — | — | — | — | — |
| 11 | Sensor 0V A | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Analogue Voltage Input 5 | — | — | — | — | — | — | — | — |
| 13 | Universal Digital Input 7 | — | W55 | — | 0.5 | OEM-D-4W | — | — | — |
| 14 | Battery Negative 1 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Battery Negative 2 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 16 | Sensor 5.0V A | — | W21 | — | 0.5 | OEM-C-3A | — | — | — |
| 17 | Low Side Ignition 5 | — | — | — | — | — | — | — | — |
| 18 | Analogue Voltage Input 2 | — | W45 | — | 0.5 | OEM-C-3I | — | — | — |
| 19 | Battery Negative 3 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Low Side Ignition 8 | — | — | — | — | — | — | — | — |
| 20 | Battery Negative 4 | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Battery Negative 5 | — | W14 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Universal Digital Input 8 | — | — | — | — | — | — | — | — |
| 23 | Battery Positive | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Peak Hold Injector 5 | — | W38 | — | 0.5 | OEM-D-4F | — | — | — |
| 25 | Low Side Ignition 6 | — | — | — | — | — | — | — | — |
| 26 | Analogue Voltage Input 1 | — | W44 | — | 0.5 | OEM-D-4AH | — | — | — |
| 27 | Sensor 0V B | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Analogue Temperature Input 1 | — | W47 | — | 0.5 | OEM-C-3W | — | — | — |
| 29 | Knock Input 1 | — | W24 | — | 0.5 | OEM-C-3O | — | — | — |
| 3 | Low Side Ignition 7 | — | — | — | — | — | — | — | — |
| 30 | Analogue Temperature Input 3 | — | W49 | — | 0.5 | OEM-C-3V | — | — | — |
| 31 | CAN Bus 1 Low | — | — | — | — | — | — | — | — |
| 32 | Battery Positive | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 33 | Peak Hold Injector 1 | — | W28 | — | 0.5 | OEM-A-1Q | — | — | — |
| 34 | Sensor 5.0V B | — | — | — | — | — | — | — | — |
| 35 | Analogue Voltage Input 7 | — | — | — | — | — | — | — | — |
| 36 | Analogue Voltage Input 6 | — | — | — | — | — | — | — | — |
| 37 | Sensor 6.3V | — | — | — | — | — | — | — | — |
| 38 | Analogue Temperature Input 2 | — | W48 | — | 0.5 | OEM-C-3T | — | — | — |
| 39 | Analogue Temperature Input 4 | — | — | — | — | — | — | — | — |
| 4 | Low Side Ignition 3 | — | W27 | — | 0.5 | OEM-D-4AN | — | — | — |
| 40 | CAN Bus 1 High | — | — | — | — | — | — | — | — |
| 41 | Battery Positive | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 42 | Peak Hold Injector 6 | — | W39 | — | 0.5 | OEM-D-4G | — | — | — |
| 43 | Low Side Injector 1 | — | W29 | — | 0.5 | OEM-A-1U | — | — | — |
| 44 | Analogue Voltage Input 8 | — | — | — | — | — | — | — | — |
| 45 | Universal Digital Input 4 | — | W52 | — | 0.5 | OEM-D-4AA | — | — | — |
| 46 | Universal Digital Input 3 | — | W51 | — | 0.5 | OEM-D-4Q | — | — | — |
| 47 | Ethernet Transmit - | — | — | — | — | — | — | — | — |
| 48 | Ethernet Transmit + | — | — | — | — | — | — | — | — |
| 49 | Universal Digital Input 1 | — | W22 | — | 0.5 | OEM-C-3R | — | — | — |
| 5 | Low Side Ignition 2 | — | W26 | — | 0.5 | OEM-D-4AJ | — | — | — |
| 50 | Peak Hold Injector 2 | — | W30 | — | 0.5 | OEM-A-1Y | — | — | — |
| 51 | Low Side Injector 2 | — | W31 | — | 0.5 | OEM-A-1AC | — | — | — |
| 52 | Universal Digital Input 5 | — | W53 | — | 0.5 | OEM-D-4S | — | — | — |
| 53 | Universal Digital Input 6 | — | W54 | — | 0.5 | OEM-D-4V | — | — | — |
| 54 | Battery Backup | — | W6 | — | 0.85 | OEM-D-4B | — | — | — |
| 55 | Ethernet Receive + | — | — | — | — | — | — | — | — |
| 56 | Universal Digital Input 2 | — | W23 | — | 0.5 | OEM-C-3U | — | — | — |
| 57 | Peak Hold Injector 7 | — | W40 | — | 0.5 | OEM-D-4I | — | — | — |
| 58 | Half Bridge Output 5 | — | W42 | — | 0.5 | OEM-D-4L | — | — | — |
| 59 | Half Bridge Output 3 | — | W34 | — | 0.5 | OEM-A-1S | — | — | — |
| 6 | Analogue Voltage Input 3 | — | W46 | — | 0.5 | OEM-C-3D | — | — | — |
| 60 | Knock Input 2 | — | — | — | — | — | — | — | — |
| 61 | Ethernet Receive - | — | — | — | — | — | — | — | — |
| 62 | Peak Hold Injector 8 | — | W41 | — | 0.5 | OEM-D-4K | — | — | — |
| 63 | Peak Hold Injector 3 | — | W36 | — | 0.5 | OEM-A-1H | — | — | — |
| 64 | Half Bridge Output 6 | — | W43 | — | 0.5 | OEM-A-1C | — | — | — |
| 65 | Half Bridge Output 4 | — | W35 | — | 0.5 | OEM-A-1W | — | — | — |
| 66 | Peak Hold Injector 4 | — | W37 | — | 0.5 | OEM-D-4D | — | — | — |
| 7 | Analogue Voltage Input 4 | — | W50 | — | 0.5 | OEM-C-3H | — | — | — |
| 8 | Half Bridge Output 2 | — | W33 | — | 0.5 | OEM-A-1AE | — | — | — |
| 9 | Half Bridge Output 1 | — | W32 | — | 0.5 | OEM-A-1AA | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1AA | OMP stepper phase B1 | — | W32 | — | 0.5 | M170-A-9 | — | — | — |
| 1AB | Sensor ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 1AC | Injector 4 (rear secondary) | — | W31 | — | 0.5 | M170-A-51 | — | — | — |
| 1AE | OMP stepper phase A1 | — | W33 | — | 0.5 | M170-A-8 | — | — | — |
| 1AF | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 1AJ | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 1C | Idle speed control (ISC) solenoid | — | W43 | — | 0.5 | M170-A-64 | — | — | — |
| 1E | Turbo charge control solenoid | — | — | — | — | — | — | — | — |
| 1G | Purge solenoid | — | — | — | — | — | — | — | — |
| 1H | Cooling fan relay (low speed) | — | W36 | — | 0.5 | M170-A-63 | — | — | — |
| 1I | Turbo charge relief solenoid | — | — | — | — | — | — | — | — |
| 1K | Turbo pre-control solenoid | — | — | — | — | — | — | — | — |
| 1L | Power ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 1M | Turbo control solenoid | — | — | — | — | — | — | — | — |
| 1O | Boost control solenoid | — | — | — | — | — | — | — | — |
| 1Q | Injector 1 (front primary) | — | W28 | — | 0.5 | M170-A-33 | — | — | — |
| 1S | OMP stepper phase B2 | — | W34 | — | 0.5 | M170-A-59 | — | — | — |
| 1U | Injector 2 (rear primary) | — | W29 | — | 0.5 | M170-A-43 | — | — | — |
| 1W | OMP stepper phase A2 | — | W35 | — | 0.5 | M170-A-65 | — | — | — |
| 1X | Sensor ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 1Y | Injector 3 (front secondary) | — | W30 | — | 0.5 | M170-A-50 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 3A | +5V sensor supply | — | W21 | — | 0.5 | M170-A-16 | — | — | — |
| 3AB | Sensor ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 3D | O2 sensor (narrowband) | — | W46 | — | 0.5 | M170-A-6 | — | — | — |
| 3G | Fuel pressure regulator control (PRC) solenoid | — | — | — | — | — | — | — | — |
| 3H | OMP position sensor | — | W50 | — | 0.5 | M170-A-7 | — | — | — |
| 3I | Throttle position (TPS, full range) | — | W45 | — | 0.5 | M170-A-18 | — | — | — |
| 3O | Knock sensor | — | W24 | — | 0.5 | M170-A-29 | — | — | — |
| 3R | Crank position (CAS NE) | — | W22 | — | 0.5 | M170-A-49 | — | — | — |
| 3S | Sensor ground (CAS) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 3T | Intake air temperature (IAT) | — | W48 | — | 0.5 | M170-A-38 | — | — | — |
| 3U | Home position (CAS G) | — | W23 | — | 0.5 | M170-A-56 | — | — | — |
| 3V | Fuel temperature | — | W49 | — | 0.5 | M170-A-30 | — | — | — |
| 3W | Coolant temperature (ECT) | — | W47 | — | 0.5 | M170-A-28 | — | — | — |
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 | M170-A-45 | — | — | — |
| 4AF | Ignition front trailing | — | W25 | — | 0.5 | M170-A-1 | — | — | — |
| 4AH | MAP sensor (PIM) | — | W44 | — | 0.5 | M170-A-26 | — | — | — |
| 4AJ | Ignition rear trailing | — | W26 | — | 0.5 | M170-A-5 | — | — | — |
| 4AN | Ignition leading (wasted spark) | — | W27 | — | 0.5 | M170-A-4 | — | — | — |
| 4B | Battery constant (+12V) | — | W6 | — | 0.85 | M170-A-54 | — | — | — |
| 4C | Ignition switch / start signal | — | — | — | — | — | — | — | — |
| 4D | Air pump clutch relay | — | W37 | — | 0.5 | M170-A-66 | — | — | — |
| 4E | ECU main power (+12V via main relay/ECR) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4F | Fuel pump speed relay | — | W38 | — | 0.5 | M170-A-24 | — | — | — |
| 4G | Fuel pump relay | — | W39 | — | 0.5 | M170-A-42 | — | — | — |
| 4I | A/C relay | — | W40 | — | 0.5 | M170-A-57 | — | — | — |
| 4K | Cooling fan relay (low speed) | — | W41 | — | 0.5 | M170-A-62 | — | — | — |
| 4L | Cooling fan relay (high speed) | — | W42 | — | 0.5 | M170-A-58 | — | — | — |
| 4M | Tachometer output | — | — | — | — | — | — | — | — |
| 4Q | Vehicle speed sensor | — | W51 | — | 0.5 | M170-A-46 | — | — | — |
| 4S | Clutch switch | — | W53 | — | 0.5 | M170-A-52 | — | — | — |
| 4V | A/C request | — | W54 | — | 0.5 | M170-A-53 | — | — | — |
| 4W | Power steering pressure switch | — | W55 | — | 0.5 | M170-A-13 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-A-1AB | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-A-1X | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-C-3AB | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-C-3S | — | — | — |
| 1 | — | — | W19 | — | 0.5 | M170-A-11 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | M170-A-27 | — | — | — |
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 | M170-A-23 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | M170-A-32 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | M170-A-41 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W7 | — | 0.85 | OEM-A-1AF | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-A-1AJ | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-A-1L | — | — | — |
| 1 | — | — | W10 | — | 0.85 | M170-A-14 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | M170-A-15 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | M170-A-19 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | M170-A-20 | — | — | — |
| 1 | — | — | W14 | — | 0.85 | M170-A-21 | — | — | — |
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 | M170-A-9 | Half Bridge Output 1 | hbridge_out | single_source | |
| OEM-A-1AB | Sensor ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | single_source | |
| OEM-A-1AC | Injector 4 (rear secondary) | injector_out | M170-A-51 | Low Side Injector 2 | injector_out | single_source | |
| OEM-A-1AE | OMP stepper phase A1 | hbridge_out | M170-A-8 | Half Bridge Output 2 | hbridge_out | single_source | |
| OEM-A-1AF | Power ground | ground | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | ground | single_source | |
| OEM-A-1AJ | Power ground | ground | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | ground | single_source | |
| OEM-A-1C | Idle speed control (ISC) solenoid | low_side_out | M170-A-64 | Half Bridge Output 6 | hbridge_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 | M170-A-63 | Peak Hold Injector 3 | injector_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 | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | 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 | M170-A-33 | Peak Hold Injector 1 | injector_out | single_source | |
| OEM-A-1S | OMP stepper phase B2 | hbridge_out | M170-A-59 | Half Bridge Output 3 | hbridge_out | single_source | |
| OEM-A-1U | Injector 2 (rear primary) | injector_out | M170-A-43 | Low Side Injector 1 | injector_out | single_source | |
| OEM-A-1W | OMP stepper phase A2 | hbridge_out | M170-A-65 | Half Bridge Output 4 | hbridge_out | single_source | |
| OEM-A-1X | Sensor ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | single_source | |
| OEM-A-1Y | Injector 3 (front secondary) | injector_out | M170-A-50 | Peak Hold Injector 2 | injector_out | single_source | |
| OEM-C-3A | +5V sensor supply | vref | M170-A-16 | Sensor 5.0V A | vref | single_source | |
| OEM-C-3AB | Sensor ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | single_source | |
| OEM-C-3D | O2 sensor (narrowband) | lambda_nb_in | M170-A-6 | Analogue Voltage 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 | M170-A-7 | Analogue Voltage Input 4 | analog_in | single_source | |
| OEM-C-3I | Throttle position (TPS, full range) | analog_in | M170-A-18 | Analogue Voltage Input 2 | analog_in | single_source | |
| OEM-C-3O | Knock sensor | knock_in | M170-A-29 | Knock Input 1 | knock_in | single_source | |
| OEM-C-3R | Crank position (CAS NE) | trigger_in | M170-A-49 | Universal Digital Input 1 | digital_in | single_source | |
| OEM-C-3S | Sensor ground (CAS) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | single_source | |
| OEM-C-3T | Intake air temperature (IAT) | temp_in | M170-A-38 | Analogue Temperature Input 2 | temp_in | single_source | |
| OEM-C-3U | Home position (CAS G) | trigger_in | M170-A-56 | Universal Digital Input 2 | digital_in | single_source | |
| OEM-C-3V | Fuel temperature | temp_in | M170-A-30 | Analogue Temperature Input 3 | temp_in | single_source | |
| OEM-C-3W | Coolant temperature (ECT) | temp_in | M170-A-28 | Analogue Temperature Input 1 | temp_in | single_source | |
| OEM-D-4A | ECU main power (+12V via main relay/ECR) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | single_source | |
| OEM-D-4AA | Brake pedal switch | digital_in | M170-A-45 | Universal Digital Input 4 | digital_in | single_source | |
| OEM-D-4AF | Ignition front trailing | ignition_out | M170-A-1 | Low Side Ignition 1 | ignition_out | single_source | |
| OEM-D-4AH | MAP sensor (PIM) | analog_in | M170-A-26 | Analogue Voltage Input 1 | analog_in | single_source | |
| OEM-D-4AJ | Ignition rear trailing | ignition_out | M170-A-5 | Low Side Ignition 2 | ignition_out | single_source | |
| OEM-D-4AN | Ignition leading (wasted spark) | ignition_out | M170-A-4 | Low Side Ignition 3 | ignition_out | single_source | |
| OEM-D-4B | Battery constant (+12V) | power_in | M170-A-54 | Battery Backup | power_in | single_source | |
| OEM-D-4C | Ignition switch / start signal | digital_in | — | — | — | single_source | |
| OEM-D-4D | Air pump clutch relay | low_side_out | M170-A-66 | Peak Hold Injector 4 | injector_out | single_source | |
| OEM-D-4E | ECU main power (+12V via main relay/ECR) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | single_source | |
| OEM-D-4F | Fuel pump speed relay | low_side_out | M170-A-24 | Peak Hold Injector 5 | injector_out | single_source | |
| OEM-D-4G | Fuel pump relay | low_side_out | M170-A-42 | Peak Hold Injector 6 | injector_out | single_source | |
| OEM-D-4I | A/C relay | low_side_out | M170-A-57 | Peak Hold Injector 7 | injector_out | single_source | |
| OEM-D-4K | Cooling fan relay (low speed) | low_side_out | M170-A-62 | Peak Hold Injector 8 | injector_out | single_source | |
| OEM-D-4L | Cooling fan relay (high speed) | low_side_out | M170-A-58 | Half Bridge Output 5 | hbridge_out | single_source | |
| OEM-D-4M | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-D-4Q | Vehicle speed sensor | digital_in | M170-A-46 | Universal Digital Input 3 | digital_in | single_source | |
| OEM-D-4S | Clutch switch | digital_in | M170-A-52 | Universal Digital Input 5 | digital_in | single_source | |
| OEM-D-4V | A/C request | digital_in | M170-A-53 | Universal Digital Input 6 | digital_in | single_source | |
| OEM-D-4W | Power steering pressure switch | digital_in | M170-A-13 | Universal Digital Input 7 | 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 | M170-A-23 | 0.85 | no route | Battery Positive | — | |
| W4 | SP-14V-1 | M170-A-32 | 0.85 | no route | Battery Positive | — | |
| W5 | SP-14V-1 | M170-A-41 | 0.85 | no route | Battery Positive | — | |
| W6 | OEM-D-4B | M170-A-54 | 0.85 | no route | Battery constant (+12V) | — | |
| W7 | OEM-A-1AF | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | OEM-A-1AJ | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W9 | OEM-A-1L | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W10 | SP-GND-1 | M170-A-14 | 0.85 | no route | Battery Negative 1 | — | |
| W11 | SP-GND-1 | M170-A-15 | 0.85 | no route | Battery Negative 2 | — | |
| W12 | SP-GND-1 | M170-A-19 | 0.85 | no route | Battery Negative 3 | — | |
| W13 | SP-GND-1 | M170-A-20 | 0.85 | no route | Battery Negative 4 | — | |
| W14 | SP-GND-1 | M170-A-21 | 0.85 | no route | Battery Negative 5 | — | |
| W15 | OEM-A-1AB | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W16 | OEM-A-1X | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W17 | OEM-C-3AB | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W18 | OEM-C-3S | SP-0V-1 | 0.5 | no route | Sensor ground (CAS) | — | |
| W19 | SP-0V-1 | M170-A-11 | 0.5 | no route | Sensor 0V A | — | |
| W20 | SP-0V-1 | M170-A-27 | 0.5 | no route | Sensor 0V B | — | |
| W21 | OEM-C-3A | M170-A-16 | 0.5 | no route | +5V sensor supply | — | |
| W22 | OEM-C-3R | M170-A-49 | 0.5 | no route | Crank position (CAS NE) | — | |
| W23 | OEM-C-3U | M170-A-56 | 0.5 | no route | Home position (CAS G) | — | |
| W24 | OEM-C-3O | M170-A-29 | 0.5 | no route | Knock sensor | — | |
| W25 | OEM-D-4AF | M170-A-1 | 0.5 | no route | Ignition front trailing | — | |
| W26 | OEM-D-4AJ | M170-A-5 | 0.5 | no route | Ignition rear trailing | — | |
| W27 | OEM-D-4AN | M170-A-4 | 0.5 | no route | Ignition leading (wasted spark) | — | |
| W28 | OEM-A-1Q | M170-A-33 | 0.5 | no route | Injector 1 (front primary) | — | |
| W29 | OEM-A-1U | M170-A-43 | 0.5 | no route | Injector 2 (rear primary) | — | |
| W30 | OEM-A-1Y | M170-A-50 | 0.5 | no route | Injector 3 (front secondary) | — | |
| W31 | OEM-A-1AC | M170-A-51 | 0.5 | no route | Injector 4 (rear secondary) | — | |
| W32 | OEM-A-1AA | M170-A-9 | 0.5 | no route | OMP stepper phase B1 | — | |
| W33 | OEM-A-1AE | M170-A-8 | 0.5 | no route | OMP stepper phase A1 | — | |
| W34 | OEM-A-1S | M170-A-59 | 0.5 | no route | OMP stepper phase B2 | — | |
| W35 | OEM-A-1W | M170-A-65 | 0.5 | no route | OMP stepper phase A2 | — | |
| W36 | OEM-A-1H | M170-A-63 | 0.5 | no route | Cooling fan relay (low speed) | — | |
| W37 | OEM-D-4D | M170-A-66 | 0.5 | no route | Air pump clutch relay | — | |
| W38 | OEM-D-4F | M170-A-24 | 0.5 | no route | Fuel pump speed relay | — | |
| W39 | OEM-D-4G | M170-A-42 | 0.5 | no route | Fuel pump relay | — | |
| W40 | OEM-D-4I | M170-A-57 | 0.5 | no route | A/C relay | — | |
| W41 | OEM-D-4K | M170-A-62 | 0.5 | no route | Cooling fan relay (low speed) | — | |
| W42 | OEM-D-4L | M170-A-58 | 0.5 | no route | Cooling fan relay (high speed) | — | |
| W43 | OEM-A-1C | M170-A-64 | 0.5 | no route | Idle speed control (ISC) solenoid | — | |
| W44 | OEM-D-4AH | M170-A-26 | 0.5 | no route | MAP sensor (PIM) | — | |
| W45 | OEM-C-3I | M170-A-18 | 0.5 | no route | Throttle position (TPS, full range) | — | |
| W46 | OEM-C-3D | M170-A-6 | 0.5 | no route | O2 sensor (narrowband) | — | |
| W47 | OEM-C-3W | M170-A-28 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W48 | OEM-C-3T | M170-A-38 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W49 | OEM-C-3V | M170-A-30 | 0.5 | no route | Fuel temperature | — | |
| W50 | OEM-C-3H | M170-A-7 | 0.5 | no route | OMP position sensor | — | |
| W51 | OEM-D-4Q | M170-A-46 | 0.5 | no route | Vehicle speed sensor | — | |
| W52 | OEM-D-4AA | M170-A-45 | 0.5 | no route | Brake pedal switch | — | |
| W53 | OEM-D-4S | M170-A-52 | 0.5 | no route | Clutch switch | — | |
| W54 | OEM-D-4V | M170-A-53 | 0.5 | no route | A/C request | — | |
| W55 | OEM-D-4W | M170-A-13 | 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 (11)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-A-1C ↔ M170-A-64 | OEM-A-1C "Idle speed control (ISC) solenoid" [low_side_out] is wired to M170-A-64 "Half Bridge Output 6" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-C-3R ↔ M170-A-49 | OEM-C-3R "Crank position (CAS NE)" [trigger_in] is wired to M170-A-49 "Universal Digital Input 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-C-3U ↔ M170-A-56 | OEM-C-3U "Home position (CAS G)" [trigger_in] is wired to M170-A-56 "Universal Digital Input 2" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-D-4L ↔ M170-A-58 | OEM-D-4L "Cooling fan relay (high speed)" [low_side_out] is wired to M170-A-58 "Half Bridge Output 5" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | NET_FAMILY | OEM-A-1H ↔ M170-A-63 | OEM-A-1H "Cooling fan relay (low speed)" [low_side_out] is wired to M170-A-63 "Peak Hold Injector 3" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-4D ↔ M170-A-66 | OEM-D-4D "Air pump clutch relay" [low_side_out] is wired to M170-A-66 "Peak Hold Injector 4" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-4F ↔ M170-A-24 | OEM-D-4F "Fuel pump speed relay" [low_side_out] is wired to M170-A-24 "Peak Hold Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-4G ↔ M170-A-42 | OEM-D-4G "Fuel pump relay" [low_side_out] is wired to M170-A-42 "Peak Hold Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-4I ↔ M170-A-57 | OEM-D-4I "A/C relay" [low_side_out] is wired to M170-A-57 "Peak Hold Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-4K ↔ M170-A-62 | OEM-D-4K "Cooling fan relay (low speed)" [low_side_out] is wired to M170-A-62 "Peak Hold Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 9 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-4C Ignition switch / start signal; OEM-D-4M Tachometer output |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: needs add-on. Resolve these before building: - Sequential twin-turbo control needed; not documented for this ECU - Trigger pattern needs a workaround: Generic crank missing-tooth / multi-tooth / Mazda RX8 (Renesis) modes only; no FD/FC CAS preset in GPR Rotary. 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 4C: Ignition switch / start signal: key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); MoTeC M170 has no dedicated key-on input - OEM-A 1E: Turbo charge control solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-A 1G: Purge solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-A 1I: Turbo charge relief solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-A 1K: Turbo pre-control solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-A 1M: Turbo control solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-A 1O: Boost control solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-C 3G: Fuel pressure regulator control (PRC) solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M170 - OEM-D 4M: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M170
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 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 | — | — | — |
| 4 | vendor_doc | MoTeC: M1 ECU Hardware manual (7 Nov 2013) — M130/M150/M170/M190 pinout tables | https://web.archive.org/web/2023id_/https://www.motec.com.au/hessian/uploads/M1_ECU_Hardware_c2517380e4.pdf | — | 2026-10-05 | 03dc5975f739 |
| 2 | forum | defreezemotorsport: MS3 FD3S 16-bit ECU pinout | https://defreezemotorsport.ru/doku.php?id=ms3:fd3s162 | — | — | — |