Mazda RX-7 FC 1986-92 (13B-T Turbo II) → MoTeC M170 13170 (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — MoTeC — M170
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 | 54 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-3-I | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | M170-A-23 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | M170-A-32 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | M170-A-41 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-J | M170-A-54 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-2-R | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-3-G | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | M170-A-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | M170-A-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | M170-A-19 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | M170-A-20 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | M170-A-21 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-1-P | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-1-Q | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | M170-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | M170-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-A | M170-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-1-T | M170-A-49 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-1-N | M170-A-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-1-R | M170-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-1-U | M170-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-1-V | M170-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-X | M170-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-E | M170-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-3-H | M170-A-43 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-3-C | M170-A-50 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-3-F | M170-A-51 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-1-F | M170-A-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-3-D | M170-A-66 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-C | M170-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-S | M170-A-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-K | M170-A-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-2-M | M170-A-62 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-2-N | M170-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-2-O | M170-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-P | M170-A-59 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-Q | M170-A-65 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-E | M170-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-B | M170-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-G | M170-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-2-D | M170-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-I | M170-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-2-J | M170-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-2-L | M170-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-2-F | M170-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-2-H | M170-A-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-1-O | M170-A-46 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-1-E | M170-A-45 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-1-G | M170-A-52 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-1-H | M170-A-53 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-1-L | M170-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-3-B | M170-A-22 | 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-16 | M170-A-14 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | M170-A-11 | M170-A-16 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | M170-A-11 | M170-A-23 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | M170-A-11 | M170-A-54 | open (OL) | sensor ground must not touch +12 V supply | |
| 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 |
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 | — | W23 | — | 0.5 | OEM-1-U | — | — | — |
| 10 | Low Side Ignition 4 | — | — | — | — | — | — | — | — |
| 11 | Sensor 0V A | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Analogue Voltage Input 5 | — | W47 | — | 0.5 | OEM-2-F | — | — | — |
| 13 | Universal Digital Input 7 | — | W53 | — | 0.5 | OEM-1-L | — | — | — |
| 14 | Battery Negative 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Battery Negative 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 16 | Sensor 5.0V A | — | W19 | — | 0.5 | OEM-2-A | — | — | — |
| 17 | Low Side Ignition 5 | — | — | — | — | — | — | — | — |
| 18 | Analogue Voltage Input 2 | — | W41 | — | 0.5 | OEM-2-B | — | — | — |
| 19 | Battery Negative 3 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Low Side Ignition 8 | — | — | — | — | — | — | — | — |
| 20 | Battery Negative 4 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Battery Negative 5 | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Universal Digital Input 8 | — | W54 | — | 0.5 | OEM-3-B | — | — | — |
| 23 | Battery Positive | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Peak Hold Injector 5 | — | W32 | — | 0.5 | OEM-1-C | — | — | — |
| 25 | Low Side Ignition 6 | — | — | — | — | — | — | — | — |
| 26 | Analogue Voltage Input 1 | — | W40 | — | 0.5 | OEM-2-E | — | — | — |
| 27 | Sensor 0V B | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Analogue Temperature Input 1 | — | W44 | — | 0.5 | OEM-2-I | — | — | — |
| 29 | Knock Input 1 | — | W22 | — | 0.5 | OEM-1-R | — | — | — |
| 3 | Low Side Ignition 7 | — | — | — | — | — | — | — | — |
| 30 | Analogue Temperature Input 3 | — | W46 | — | 0.5 | OEM-2-L | — | — | — |
| 31 | CAN Bus 1 Low | — | — | — | — | — | — | — | — |
| 32 | Battery Positive | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 33 | Peak Hold Injector 1 | — | W26 | — | 0.5 | OEM-3-E | — | — | — |
| 34 | Sensor 5.0V B | — | — | — | — | — | — | — | — |
| 35 | Analogue Voltage Input 7 | — | — | — | — | — | — | — | — |
| 36 | Analogue Voltage Input 6 | — | W48 | — | 0.5 | OEM-2-H | — | — | — |
| 37 | Sensor 6.3V | — | — | — | — | — | — | — | — |
| 38 | Analogue Temperature Input 2 | — | W45 | — | 0.5 | OEM-2-J | — | — | — |
| 39 | Analogue Temperature Input 4 | — | — | — | — | — | — | — | — |
| 4 | Low Side Ignition 3 | — | W25 | — | 0.5 | OEM-1-X | — | — | — |
| 40 | CAN Bus 1 High | — | — | — | — | — | — | — | — |
| 41 | Battery Positive | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 42 | Peak Hold Injector 6 | — | W33 | — | 0.5 | OEM-1-S | — | — | — |
| 43 | Low Side Injector 1 | — | W27 | — | 0.5 | OEM-3-H | — | — | — |
| 44 | Analogue Voltage Input 8 | — | — | — | — | — | — | — | — |
| 45 | Universal Digital Input 4 | — | W50 | — | 0.5 | OEM-1-E | — | — | — |
| 46 | Universal Digital Input 3 | — | W49 | — | 0.5 | OEM-1-O | — | — | — |
| 47 | Ethernet Transmit - | — | — | — | — | — | — | — | — |
| 48 | Ethernet Transmit + | — | — | — | — | — | — | — | — |
| 49 | Universal Digital Input 1 | — | W20 | — | 0.5 | OEM-1-T | — | — | — |
| 5 | Low Side Ignition 2 | — | W24 | — | 0.5 | OEM-1-V | — | — | — |
| 50 | Peak Hold Injector 2 | — | W28 | — | 0.5 | OEM-3-C | — | — | — |
| 51 | Low Side Injector 2 | — | W29 | — | 0.5 | OEM-3-F | — | — | — |
| 52 | Universal Digital Input 5 | — | W51 | — | 0.5 | OEM-1-G | — | — | — |
| 53 | Universal Digital Input 6 | — | W52 | — | 0.5 | OEM-1-H | — | — | — |
| 54 | Battery Backup | — | W5 | — | 0.85 | OEM-3-J | — | — | — |
| 55 | Ethernet Receive + | — | — | — | — | — | — | — | — |
| 56 | Universal Digital Input 2 | — | W21 | — | 0.5 | OEM-1-N | — | — | — |
| 57 | Peak Hold Injector 7 | — | W34 | — | 0.5 | OEM-2-K | — | — | — |
| 58 | Half Bridge Output 5 | — | — | — | — | — | — | — | — |
| 59 | Half Bridge Output 3 | — | W38 | — | 0.5 | OEM-2-P | — | — | — |
| 6 | Analogue Voltage Input 3 | — | W42 | — | 0.5 | OEM-2-G | — | — | — |
| 60 | Knock Input 2 | — | — | — | — | — | — | — | — |
| 61 | Ethernet Receive - | — | — | — | — | — | — | — | — |
| 62 | Peak Hold Injector 8 | — | W35 | — | 0.5 | OEM-2-M | — | — | — |
| 63 | Peak Hold Injector 3 | — | W30 | — | 0.5 | OEM-1-F | — | — | — |
| 64 | Half Bridge Output 6 | — | — | — | — | — | — | — | — |
| 65 | Half Bridge Output 4 | — | W39 | — | 0.5 | OEM-2-Q | — | — | — |
| 66 | Peak Hold Injector 4 | — | W31 | — | 0.5 | OEM-3-D | — | — | — |
| 7 | Analogue Voltage Input 4 | — | W43 | — | 0.5 | OEM-2-D | — | — | — |
| 8 | Half Bridge Output 2 | — | W37 | — | 0.5 | OEM-2-O | — | — | — |
| 9 | Half Bridge Output 1 | — | W36 | — | 0.5 | OEM-2-N | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W32 | — | 0.5 | M170-A-24 | — | — | — |
| E | A/C request | — | W50 | — | 0.5 | M170-A-45 | — | — | — |
| F | A/C clutch relay | — | W30 | — | 0.5 | M170-A-63 | — | — | — |
| G | Neutral switch | — | W51 | — | 0.5 | M170-A-52 | — | — | — |
| H | Water temperature switch | — | W52 | — | 0.5 | M170-A-53 | — | — | — |
| L | Clutch switch | — | W53 | — | 0.5 | M170-A-13 | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W21 | — | 0.5 | M170-A-56 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W49 | — | 0.5 | M170-A-46 | — | — | — |
| P | CAS ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | W22 | — | 0.5 | M170-A-29 | — | — | — |
| S | Port air valve | — | W33 | — | 0.5 | M170-A-42 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W20 | — | 0.5 | M170-A-49 | — | — | — |
| U | Ignition select (trailing rotor) | — | W23 | — | 0.5 | M170-A-1 | — | — | — |
| V | Ignition leading | — | W24 | — | 0.5 | M170-A-5 | — | — | — |
| X | Ignition trailing | — | W25 | — | 0.5 | M170-A-4 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W19 | — | 0.5 | M170-A-16 | — | — | — |
| B | MAP (pressure) signal | — | W41 | — | 0.5 | M170-A-18 | — | — | — |
| C | Sensor ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | W43 | — | 0.5 | M170-A-7 | — | — | — |
| E | Airflow signal (AFM) | — | W40 | — | 0.5 | M170-A-26 | — | — | — |
| F | Variable resistor (tuning) | — | W47 | — | 0.5 | M170-A-12 | — | — | — |
| G | Throttle position (TPS) | — | W42 | — | 0.5 | M170-A-6 | — | — | — |
| H | Atmospheric pressure (ATP) | — | W48 | — | 0.5 | M170-A-36 | — | — | — |
| I | Coolant temperature (ECT) | — | W44 | — | 0.5 | M170-A-28 | — | — | — |
| J | Inlet air temperature (IAT) | — | W45 | — | 0.5 | M170-A-38 | — | — | — |
| K | Turbo control valve (boost) | — | W34 | — | 0.5 | M170-A-57 | — | — | — |
| L | Manifold air temperature (MAT) | — | W46 | — | 0.5 | M170-A-30 | — | — | — |
| M | Pressure regulator control valve | — | W35 | — | 0.5 | M170-A-62 | — | — | — |
| N | EGR valve | — | W36 | — | 0.5 | M170-A-9 | — | — | — |
| O | Switching valve | — | W37 | — | 0.5 | M170-A-8 | — | — | — |
| P | Relief valve | — | W38 | — | 0.5 | M170-A-59 | — | — | — |
| Q | Idle control (BAC) | — | W39 | — | 0.5 | M170-A-65 | — | — | — |
| R | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Starter input | — | W54 | — | 0.5 | M170-A-22 | — | — | — |
| C | Primary injector 2 | — | W28 | — | 0.5 | M170-A-50 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W31 | — | 0.5 | M170-A-66 | — | — | — |
| E | Primary injector 1 | — | W26 | — | 0.5 | M170-A-33 | — | — | — |
| F | Secondary injector 2 | — | W29 | — | 0.5 | M170-A-51 | — | — | — |
| G | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W27 | — | 0.5 | M170-A-43 | — | — | — |
| I | Ignition power (+12V via main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| J | Battery constant (+12V) | — | W5 | — | 0.85 | M170-A-54 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W14 | — | 0.5 | OEM-1-P | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-1-Q | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W17 | — | 0.5 | M170-A-11 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | M170-A-27 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | M170-A-23 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | M170-A-32 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | M170-A-41 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-2-R | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-3-G | — | — | — |
| 1 | — | — | W9 | — | 0.85 | M170-A-14 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | M170-A-15 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | M170-A-19 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | M170-A-20 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | M170-A-21 | — | — | — |
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 | M170-A-24 | Peak Hold Injector 5 | injector_out | single_source | |
| OEM-1-E | A/C request | digital_in | M170-A-45 | Universal Digital Input 4 | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | M170-A-63 | Peak Hold Injector 3 | injector_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | M170-A-52 | Universal Digital Input 5 | digital_in | corroborated | |
| OEM-1-H | Water temperature switch | digital_in | M170-A-53 | Universal Digital Input 6 | digital_in | corroborated | |
| OEM-1-L | Clutch switch | digital_in | M170-A-13 | Universal Digital Input 7 | digital_in | single_source | |
| OEM-1-M | Ignition feedback (tacho) | tacho_out | — | — | — | single_source | |
| OEM-1-N | CAS 2-tooth (G, cam) | trigger_in | M170-A-56 | Universal Digital Input 2 | digital_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | M170-A-46 | Universal Digital Input 3 | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-1-R | Knock input | knock_in | M170-A-29 | Knock Input 1 | knock_in | corroborated | |
| OEM-1-S | Port air valve | low_side_out | M170-A-42 | Peak Hold Injector 6 | injector_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | M170-A-49 | Universal Digital Input 1 | digital_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | M170-A-1 | Low Side Ignition 1 | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | M170-A-5 | Low Side Ignition 2 | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | M170-A-4 | Low Side Ignition 3 | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | M170-A-16 | Sensor 5.0V A | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | M170-A-18 | Analogue Voltage Input 2 | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | M170-A-7 | Analogue Voltage Input 4 | analog_in | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | M170-A-26 | Analogue Voltage Input 1 | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | M170-A-12 | Analogue Voltage Input 5 | analog_in | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | M170-A-6 | Analogue Voltage Input 3 | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | M170-A-36 | Analogue Voltage Input 6 | analog_in | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | M170-A-28 | Analogue Temperature Input 1 | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | M170-A-38 | Analogue Temperature Input 2 | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | M170-A-57 | Peak Hold Injector 7 | injector_out | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | M170-A-30 | Analogue Temperature Input 3 | temp_in | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | M170-A-62 | Peak Hold Injector 8 | injector_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | M170-A-9 | Half Bridge Output 1 | hbridge_out | single_source | |
| OEM-2-O | Switching valve | low_side_out | M170-A-8 | Half Bridge Output 2 | hbridge_out | single_source | |
| OEM-2-P | Relief valve | low_side_out | M170-A-59 | Half Bridge Output 3 | hbridge_out | single_source | |
| OEM-2-Q | Idle control (BAC) | low_side_out | M170-A-65 | Half Bridge Output 4 | hbridge_out | single_source | |
| OEM-2-R | 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-3-A | 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-3-B | Starter input | digital_in | M170-A-22 | Universal Digital Input 8 | digital_in | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | M170-A-50 | Peak Hold Injector 2 | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | M170-A-66 | Peak Hold Injector 4 | injector_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | M170-A-33 | Peak Hold Injector 1 | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | M170-A-51 | Low Side Injector 2 | injector_out | single_source | |
| OEM-3-G | 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-3-H | Secondary injector 1 | injector_out | M170-A-43 | Low Side Injector 1 | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | single_source | |
| OEM-3-J | Battery constant (+12V) | power_in | M170-A-54 | Battery Backup | 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 | M170-A-23 | 0.85 | no route | Battery Positive | — | |
| W3 | SP-14V-1 | M170-A-32 | 0.85 | no route | Battery Positive | — | |
| W4 | SP-14V-1 | M170-A-41 | 0.85 | no route | Battery Positive | — | |
| W5 | OEM-3-J | M170-A-54 | 0.85 | no route | Battery constant (+12V) | — | |
| W6 | OEM-2-R | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | OEM-3-G | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W9 | SP-GND-1 | M170-A-14 | 0.85 | no route | Battery Negative 1 | — | |
| W10 | SP-GND-1 | M170-A-15 | 0.85 | no route | Battery Negative 2 | — | |
| W11 | SP-GND-1 | M170-A-19 | 0.85 | no route | Battery Negative 3 | — | |
| W12 | SP-GND-1 | M170-A-20 | 0.85 | no route | Battery Negative 4 | — | |
| W13 | SP-GND-1 | M170-A-21 | 0.85 | no route | Battery Negative 5 | — | |
| W14 | OEM-1-P | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W15 | OEM-1-Q | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W16 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W17 | SP-0V-1 | M170-A-11 | 0.5 | no route | Sensor 0V A | — | |
| W18 | SP-0V-1 | M170-A-27 | 0.5 | no route | Sensor 0V B | — | |
| W19 | OEM-2-A | M170-A-16 | 0.5 | no route | 5V sensor supply | — | |
| W20 | OEM-1-T | M170-A-49 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W21 | OEM-1-N | M170-A-56 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W22 | OEM-1-R | M170-A-29 | 0.5 | no route | Knock input | — | |
| W23 | OEM-1-U | M170-A-1 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W24 | OEM-1-V | M170-A-5 | 0.5 | no route | Ignition leading | — | |
| W25 | OEM-1-X | M170-A-4 | 0.5 | no route | Ignition trailing | — | |
| W26 | OEM-3-E | M170-A-33 | 0.5 | no route | Primary injector 1 | — | |
| W27 | OEM-3-H | M170-A-43 | 0.5 | no route | Secondary injector 1 | — | |
| W28 | OEM-3-C | M170-A-50 | 0.5 | no route | Primary injector 2 | — | |
| W29 | OEM-3-F | M170-A-51 | 0.5 | no route | Secondary injector 2 | — | |
| W30 | OEM-1-F | M170-A-63 | 0.5 | no route | A/C clutch relay | — | |
| W31 | OEM-3-D | M170-A-66 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W32 | OEM-1-C | M170-A-24 | 0.5 | no route | Air bypass solenoid | — | |
| W33 | OEM-1-S | M170-A-42 | 0.5 | no route | Port air valve | — | |
| W34 | OEM-2-K | M170-A-57 | 0.5 | no route | Turbo control valve (boost) | — | |
| W35 | OEM-2-M | M170-A-62 | 0.5 | no route | Pressure regulator control valve | — | |
| W36 | OEM-2-N | M170-A-9 | 0.5 | no route | EGR valve | — | |
| W37 | OEM-2-O | M170-A-8 | 0.5 | no route | Switching valve | — | |
| W38 | OEM-2-P | M170-A-59 | 0.5 | no route | Relief valve | — | |
| W39 | OEM-2-Q | M170-A-65 | 0.5 | no route | Idle control (BAC) | — | |
| W40 | OEM-2-E | M170-A-26 | 0.5 | no route | Airflow signal (AFM) | — | |
| W41 | OEM-2-B | M170-A-18 | 0.5 | no route | MAP (pressure) signal | — | |
| W42 | OEM-2-G | M170-A-6 | 0.5 | no route | Throttle position (TPS) | — | |
| W43 | OEM-2-D | M170-A-7 | 0.5 | no route | O2 sensor signal | — | |
| W44 | OEM-2-I | M170-A-28 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W45 | OEM-2-J | M170-A-38 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W46 | OEM-2-L | M170-A-30 | 0.5 | no route | Manifold air temperature (MAT) | — | |
| W47 | OEM-2-F | M170-A-12 | 0.5 | no route | Variable resistor (tuning) | — | |
| W48 | OEM-2-H | M170-A-36 | 0.5 | no route | Atmospheric pressure (ATP) | — | |
| W49 | OEM-1-O | M170-A-46 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W50 | OEM-1-E | M170-A-45 | 0.5 | no route | A/C request | — | |
| W51 | OEM-1-G | M170-A-52 | 0.5 | no route | Neutral switch | — | |
| W52 | OEM-1-H | M170-A-53 | 0.5 | no route | Water temperature switch | — | |
| W53 | OEM-1-L | M170-A-13 | 0.5 | no route | Clutch switch | — | |
| W54 | OEM-3-B | M170-A-22 | 0.5 | no route | Starter input | — |
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 (13)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-1-N ↔ M170-A-56 | OEM-1-N "CAS 2-tooth (G, cam)" [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-1-T ↔ M170-A-49 | OEM-1-T "CAS 24-tooth (NE, crank)" [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-2-N ↔ M170-A-9 | OEM-2-N "EGR valve" [low_side_out] is wired to M170-A-9 "Half Bridge Output 1" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-2-O ↔ M170-A-8 | OEM-2-O "Switching valve" [low_side_out] is wired to M170-A-8 "Half Bridge Output 2" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-2-P ↔ M170-A-59 | OEM-2-P "Relief valve" [low_side_out] is wired to M170-A-59 "Half Bridge Output 3" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-2-Q ↔ M170-A-65 | OEM-2-Q "Idle control (BAC)" [low_side_out] is wired to M170-A-65 "Half Bridge Output 4" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | NET_FAMILY | OEM-1-C ↔ M170-A-24 | OEM-1-C "Air bypass solenoid" [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-1-F ↔ M170-A-63 | OEM-1-F "A/C clutch relay" [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-1-S ↔ M170-A-42 | OEM-1-S "Port air valve" [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-2-K ↔ M170-A-57 | OEM-2-K "Turbo control valve (boost)" [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-2-M ↔ M170-A-62 | OEM-2-M "Pressure regulator control valve" [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 | NET_FAMILY | OEM-3-D ↔ M170-A-66 | OEM-3-D "Starter inhibit / fuel pump control" [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 | UNMAPPED | OEM | 1 optional OEM pins are not mapped: OEM-1-M Ignition feedback (tacho) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
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-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on MoTeC M170
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 | 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 | 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/ | — | — | — |