MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) → MoTeC M170 13170 (auto)
MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) — MoTeC — M170
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-05
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 | — | W21 | — | 0.5 | OEM-1-G | — | — | — |
| 10 | Low Side Ignition 4 | — | — | — | — | — | — | — | — |
| 11 | Sensor 0V A | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Analogue Voltage Input 5 | — | — | — | — | — | — | — | — |
| 13 | Universal Digital Input 7 | — | W36 | — | 0.5 | OEM-1-V | — | — | — |
| 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 | — | W18 | — | 0.5 | OEM-2-K | — | — | — |
| 17 | Low Side Ignition 5 | — | — | — | — | — | — | — | — |
| 18 | Analogue Voltage Input 2 | — | W29 | — | 0.5 | OEM-2-N | — | — | — |
| 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 | — | W37 | — | 0.5 | OEM-2-L | — | — | — |
| 23 | Battery Positive | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Peak Hold Injector 5 | — | — | — | — | — | — | — | — |
| 25 | Low Side Ignition 6 | — | — | — | — | — | — | — | — |
| 26 | Analogue Voltage Input 1 | — | W28 | — | 0.5 | OEM-2-O | — | — | — |
| 27 | Sensor 0V B | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Analogue Temperature Input 1 | — | W30 | — | 0.5 | OEM-2-Q | — | — | — |
| 29 | Knock Input 1 | — | — | — | — | — | — | — | — |
| 3 | Low Side Ignition 7 | — | — | — | — | — | — | — | — |
| 30 | Analogue Temperature Input 3 | — | — | — | — | — | — | — | — |
| 31 | CAN Bus 1 Low | — | — | — | — | — | — | — | — |
| 32 | Battery Positive | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 33 | Peak Hold Injector 1 | — | W23 | — | 0.5 | OEM-2-U | — | — | — |
| 34 | Sensor 5.0V B | — | — | — | — | — | — | — | — |
| 35 | Analogue Voltage Input 7 | — | — | — | — | — | — | — | — |
| 36 | Analogue Voltage Input 6 | — | — | — | — | — | — | — | — |
| 37 | Sensor 6.3V | — | — | — | — | — | — | — | — |
| 38 | Analogue Temperature Input 2 | — | W31 | — | 0.5 | OEM-2-P | — | — | — |
| 39 | Analogue Temperature Input 4 | — | — | — | — | — | — | — | — |
| 4 | Low Side Ignition 3 | — | — | — | — | — | — | — | — |
| 40 | CAN Bus 1 High | — | — | — | — | — | — | — | — |
| 41 | Battery Positive | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 42 | Peak Hold Injector 6 | — | — | — | — | — | — | — | — |
| 43 | Low Side Injector 1 | — | W24 | — | 0.5 | OEM-2-V | — | — | — |
| 44 | Analogue Voltage Input 8 | — | — | — | — | — | — | — | — |
| 45 | Universal Digital Input 4 | — | W33 | — | 0.5 | OEM-1-N | — | — | — |
| 46 | Universal Digital Input 3 | — | W32 | — | 0.5 | OEM-1-C | — | — | — |
| 47 | Ethernet Transmit - | — | — | — | — | — | — | — | — |
| 48 | Ethernet Transmit + | — | — | — | — | — | — | — | — |
| 49 | Universal Digital Input 1 | — | W19 | — | 0.5 | OEM-2-E | — | — | — |
| 5 | Low Side Ignition 2 | — | W22 | — | 0.5 | OEM-1-H | — | — | — |
| 50 | Peak Hold Injector 2 | — | W25 | — | 0.5 | OEM-2-Y | — | — | — |
| 51 | Low Side Injector 2 | — | W26 | — | 0.5 | OEM-2-Z | — | — | — |
| 52 | Universal Digital Input 5 | — | W34 | — | 0.5 | OEM-1-P | — | — | — |
| 53 | Universal Digital Input 6 | — | W35 | — | 0.5 | OEM-1-Q | — | — | — |
| 54 | Battery Backup | — | W5 | — | 0.85 | OEM-1-A | — | — | — |
| 55 | Ethernet Receive + | — | — | — | — | — | — | — | — |
| 56 | Universal Digital Input 2 | — | W20 | — | 0.5 | OEM-2-G | — | — | — |
| 57 | Peak Hold Injector 7 | — | — | — | — | — | — | — | — |
| 58 | Half Bridge Output 5 | — | — | — | — | — | — | — | — |
| 59 | Half Bridge Output 3 | — | — | — | — | — | — | — | — |
| 6 | Analogue Voltage Input 3 | — | — | — | — | — | — | — | — |
| 60 | Knock Input 2 | — | — | — | — | — | — | — | — |
| 61 | Ethernet Receive - | — | — | — | — | — | — | — | — |
| 62 | Peak Hold Injector 8 | — | — | — | — | — | — | — | — |
| 63 | Peak Hold Injector 3 | — | W27 | — | 0.5 | OEM-1-E | — | — | — |
| 64 | Half Bridge Output 6 | — | — | — | — | — | — | — | — |
| 65 | Half Bridge Output 4 | — | — | — | — | — | — | — | — |
| 66 | Peak Hold Injector 4 | — | — | — | — | — | — | — | — |
| 7 | Analogue Voltage Input 4 | — | — | — | — | — | — | — | — |
| 8 | Half Bridge Output 2 | — | — | — | — | — | — | — | — |
| 9 | Half Bridge Output 1 | — | — | — | — | — | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | W5 | — | 0.85 | M170-A-54 | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| C | Start signal | — | W32 | — | 0.5 | M170-A-46 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W27 | — | 0.5 | M170-A-63 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W21 | — | 0.5 | M170-A-1 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W22 | — | 0.5 | M170-A-5 | — | — | — |
| N | Wide-open throttle switch | — | W33 | — | 0.5 | M170-A-45 | — | — | — |
| P | Power steering pressure switch | — | W34 | — | 0.5 | M170-A-52 | — | — | — |
| Q | A/C request | — | W35 | — | 0.5 | M170-A-53 | — | — | — |
| V | Neutral/clutch switch | — | W36 | — | 0.5 | M170-A-13 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| D | Power ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Crank position (CAS NE) | — | W19 | — | 0.5 | M170-A-49 | — | — | — |
| F | AFM ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Cam position (CAS G) | — | W20 | — | 0.5 | M170-A-56 | — | — | — |
| I | Tachometer output | — | — | — | — | — | — | — | — |
| K | +5V sensor supply | — | W18 | — | 0.5 | M170-A-16 | — | — | — |
| L | Idle switch (TPS) | — | W37 | — | 0.5 | M170-A-22 | — | — | — |
| N | O2 sensor | — | W29 | — | 0.5 | M170-A-18 | — | — | — |
| O | Air flow meter (AFM) | — | W28 | — | 0.5 | M170-A-26 | — | — | — |
| P | Intake air temperature (IAT) | — | W31 | — | 0.5 | M170-A-38 | — | — | — |
| Q | Coolant temperature (ECT) | — | W30 | — | 0.5 | M170-A-28 | — | — | — |
| U | Injector 1 | — | W23 | — | 0.5 | M170-A-33 | — | — | — |
| V | Injector 2 | — | W24 | — | 0.5 | M170-A-43 | — | — | — |
| Y | Injector 3 | — | W25 | — | 0.5 | M170-A-50 | — | — | — |
| Z | Injector 4 | — | W26 | — | 0.5 | M170-A-51 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-2-F | — | — | — |
| 1 | — | — | W16 | — | 0.5 | M170-A-11 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | M170-A-27 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 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-A | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-2-B | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-2-C | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-2-D | — | — | — |
| 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-1-A | Constant +12V | power_in | M170-A-54 | Battery Backup | power_in | single_source | |
| OEM-1-B | ECU power +14V (main relay) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | single_source | |
| OEM-1-C | Start signal | digital_in | M170-A-46 | Universal Digital Input 3 | digital_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | M170-A-63 | Peak Hold Injector 3 | injector_out | single_source | |
| OEM-1-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | M170-A-1 | Low Side Ignition 1 | ignition_out | single_source | |
| OEM-1-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | M170-A-5 | Low Side Ignition 2 | ignition_out | single_source | |
| OEM-1-N | Wide-open throttle switch | digital_in | M170-A-45 | Universal Digital Input 4 | digital_in | single_source | |
| OEM-1-P | Power steering pressure switch | digital_in | M170-A-52 | Universal Digital Input 5 | digital_in | single_source | |
| OEM-1-Q | A/C request | digital_in | M170-A-53 | Universal Digital Input 6 | digital_in | single_source | |
| OEM-1-V | Neutral/clutch switch | digital_in | M170-A-13 | Universal Digital Input 7 | digital_in | single_source | |
| OEM-2-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-2-B | 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-2-C | 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-2-D | 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-2-E | Crank position (CAS NE) | trigger_in | M170-A-49 | Universal Digital Input 1 | digital_in | single_source | |
| OEM-2-F | AFM ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | single_source | |
| OEM-2-G | Cam position (CAS G) | trigger_in | M170-A-56 | Universal Digital Input 2 | digital_in | single_source | |
| OEM-2-I | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-2-K | +5V sensor supply | vref | M170-A-16 | Sensor 5.0V A | vref | single_source | |
| OEM-2-L | Idle switch (TPS) | digital_in | M170-A-22 | Universal Digital Input 8 | digital_in | single_source | |
| OEM-2-N | O2 sensor | lambda_nb_in | M170-A-18 | Analogue Voltage Input 2 | analog_in | single_source | |
| OEM-2-O | Air flow meter (AFM) | analog_in | M170-A-26 | Analogue Voltage Input 1 | analog_in | single_source | |
| OEM-2-P | Intake air temperature (IAT) | temp_in | M170-A-38 | Analogue Temperature Input 2 | temp_in | single_source | |
| OEM-2-Q | Coolant temperature (ECT) | temp_in | M170-A-28 | Analogue Temperature Input 1 | temp_in | single_source | |
| OEM-2-U | Injector 1 | injector_out | M170-A-33 | Peak Hold Injector 1 | injector_out | single_source | |
| OEM-2-V | Injector 2 | injector_out | M170-A-43 | Low Side Injector 1 | injector_out | single_source | |
| OEM-2-Y | Injector 3 | injector_out | M170-A-50 | Peak Hold Injector 2 | injector_out | single_source | |
| OEM-2-Z | Injector 4 | injector_out | M170-A-51 | Low Side Injector 2 | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | no route | ECU power +14V (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-1-A | M170-A-54 | 0.85 | no route | Constant +12V | — | |
| W6 | OEM-2-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-2-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | OEM-2-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W9 | OEM-2-D | 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-2-F | SP-0V-1 | 0.5 | no route | AFM ground | — | |
| W16 | SP-0V-1 | M170-A-11 | 0.5 | no route | Sensor 0V A | — | |
| W17 | SP-0V-1 | M170-A-27 | 0.5 | no route | Sensor 0V B | — | |
| W18 | OEM-2-K | M170-A-16 | 0.5 | no route | +5V sensor supply | — | |
| W19 | OEM-2-E | M170-A-49 | 0.5 | no route | Crank position (CAS NE) | — | |
| W20 | OEM-2-G | M170-A-56 | 0.5 | no route | Cam position (CAS G) | — | |
| W21 | OEM-1-G | M170-A-1 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W22 | OEM-1-H | M170-A-5 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W23 | OEM-2-U | M170-A-33 | 0.5 | no route | Injector 1 | — | |
| W24 | OEM-2-V | M170-A-43 | 0.5 | no route | Injector 2 | — | |
| W25 | OEM-2-Y | M170-A-50 | 0.5 | no route | Injector 3 | — | |
| W26 | OEM-2-Z | M170-A-51 | 0.5 | no route | Injector 4 | — | |
| W27 | OEM-1-E | M170-A-63 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W28 | OEM-2-O | M170-A-26 | 0.5 | no route | Air flow meter (AFM) | — | |
| W29 | OEM-2-N | M170-A-18 | 0.5 | no route | O2 sensor | — | |
| W30 | OEM-2-Q | M170-A-28 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W31 | OEM-2-P | M170-A-38 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W32 | OEM-1-C | M170-A-46 | 0.5 | no route | Start signal | — | |
| W33 | OEM-1-N | M170-A-45 | 0.5 | no route | Wide-open throttle switch | — | |
| W34 | OEM-1-P | M170-A-52 | 0.5 | no route | Power steering pressure switch | — | |
| W35 | OEM-1-Q | M170-A-53 | 0.5 | no route | A/C request | — | |
| W36 | OEM-1-V | M170-A-13 | 0.5 | no route | Neutral/clutch switch | — | |
| W37 | OEM-2-L | M170-A-22 | 0.5 | no route | Idle switch (TPS) | — |
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 (4)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-2-E ↔ M170-A-49 | OEM-2-E "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-2-G ↔ M170-A-56 | OEM-2-G "Cam 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. |
| info | NET_FAMILY | OEM-1-E ↔ M170-A-63 | OEM-1-E "Malfunction indicator lamp (MIL)" [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 | UNMAPPED | OEM | 1 optional OEM pins are not mapped: OEM-2-I Tachometer output |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-04. Review every wire against both manuals before building. Not wired: - OEM-2 I: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M170
Sources
| Reliability | Kind | Title | URL |
|---|---|---|---|
| 4 | vendor_doc | Link G4X MX5X install manual (NA 1.6/1.8) | https://linkecu.com/documentation/MX5X.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 |