MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) → MoTeC M800 universal (auto)
MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) — MoTeC — M800
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-04
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
M800-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | AUX2 | — | W23 | — | 0.5 | OEM-2-I | — | — | — |
| 2 | 5V Engine Sensor Supply | — | W13 | — | 0.5 | OEM-2-K | — | — | — |
| 3 | IGN1 | — | W16 | — | 0.5 | OEM-1-G | — | — | — |
| 4 | IGN2 | — | W17 | — | 0.5 | OEM-1-H | — | — | — |
| 5 | IGN3 | — | — | — | — | — | — | — | — |
| 6 | IGN4 | — | — | — | — | — | — | — | — |
| 7 | IGN5 | — | — | — | — | — | — | — | — |
| 8 | IGN6 | — | — | — | — | — | — | — | — |
| 9 | 5V Auxiliary Sensor Supply | — | — | — | — | — | — | — | — |
| 10 | GND Battery Negative | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | GND Battery Negative | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | 8V Engine Sensor Supply | — | — | — | — | — | — | — | — |
| 13 | 8V Auxiliary Sensor and CAN Supply | — | — | — | — | — | — | — | — |
| 14 | AV1 | — | W24 | — | 0.5 | OEM-2-O | — | — | — |
| 15 | Analog Voltage Input 2 | — | W25 | — | 0.5 | OEM-2-N | — | — | — |
| 16 | Analog Voltage Input 3 | — | W32 | — | 0.5 | OEM-1-V | — | — | — |
| 17 | Analog Voltage Input 4 | — | W33 | — | 0.5 | OEM-2-L | — | — | — |
| 18 | AUX1 | — | W22 | — | 0.5 | OEM-1-E | — | — | — |
| 19 | INJ1 | — | W18 | — | 0.5 | OEM-2-U | — | — | — |
| 20 | INJ2 | — | W19 | — | 0.5 | OEM-2-V | — | — | — |
| 21 | INJ3 | — | W20 | — | 0.5 | OEM-2-Y | — | — | — |
| 22 | INJ4 | — | W21 | — | 0.5 | OEM-2-Z | — | — | — |
| 23 | AUX3 | — | — | — | — | — | — | — | — |
| 24 | AUX4 | — | — | — | — | — | — | — | — |
| 25 | Analog Voltage Input 5 | — | — | — | — | — | — | — | — |
| 26 | VBAT Battery Positive | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | INJ5 | — | — | — | — | — | — | — | — |
| 28 | INJ6 | — | — | — | — | — | — | — | — |
| 29 | INJ7 | — | — | — | — | — | — | — | — |
| 30 | INJ8 | — | — | — | — | — | — | — | — |
| 31 | AUX5 | — | — | — | — | — | — | — | — |
| 32 | AUX6 | — | — | — | — | — | — | — | — |
| 33 | AUX7 | — | — | — | — | — | — | — | — |
| 34 | AUX8 | — | — | — | — | — | — | — | — |
M800-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Crank Reference Timing Input | — | W14 | — | 0.5 | OEM-2-E | — | — | — |
| 2 | Cam Sync Timing Input | — | W15 | — | 0.5 | OEM-2-G | — | — | — |
| 3 | Analog Temperature Input 1 | — | W26 | — | 0.5 | OEM-2-Q | — | — | — |
| 4 | Analog Temperature Input 2 | — | W27 | — | 0.5 | OEM-2-P | — | — | — |
| 5 | Analog Temperature Input 3 | — | — | — | — | — | — | — | — |
| 6 | Analog Temperature Input 4 | — | — | — | — | — | — | — | — |
| 7 | Analog Temperature Input 5 | — | — | — | — | — | — | — | — |
| 8 | Digital Input 1 | — | W28 | — | 0.5 | OEM-1-C | — | — | — |
| 9 | Digital Input 2 | — | W29 | — | 0.5 | OEM-1-N | — | — | — |
| 10 | Digital Input 3 | — | W30 | — | 0.5 | OEM-1-P | — | — | — |
| 11 | Digital Input 4 | — | W31 | — | 0.5 | OEM-1-Q | — | — | — |
| 12 | Lambda2 Sense Voltage | — | — | — | — | — | — | — | — |
| 13 | Lambda2 Pump Current | — | — | — | — | — | — | — | — |
| 14 | 0V Comms Reference | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | 0V Auxiliary Sensor Supply | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | 0V Engine Sensor Supply | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 17 | RS232 Transmit Data | — | — | — | — | — | — | — | — |
| 18 | RS232 Receive Data | — | — | — | — | — | — | — | — |
| 19 | Analog Temperature Input 6 | — | — | — | — | — | — | — | — |
| 20 | Analog Voltage Input 6 | — | — | — | — | — | — | — | — |
| 21 | AV7 | — | — | — | — | — | — | — | — |
| 22 | AV8 | — | — | — | — | — | — | — | — |
| 23 | CAN Bus High | — | — | — | — | — | — | — | — |
| 24 | CAN Bus Low | — | — | — | — | — | — | — | — |
| 25 | Lambda1 Sense Voltage | — | — | — | — | — | — | — | — |
| 26 | Lambda1 Pump Current | — | — | — | — | — | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | — | — | — | — | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| C | Start signal | — | W28 | — | 0.5 | M800-B-8 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W22 | — | 0.5 | M800-A-18 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W16 | — | 0.5 | M800-A-3 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W17 | — | 0.5 | M800-A-4 | — | — | — |
| N | Wide-open throttle switch | — | W29 | — | 0.5 | M800-B-9 | — | — | — |
| P | Power steering pressure switch | — | W30 | — | 0.5 | M800-B-10 | — | — | — |
| Q | A/C request | — | W31 | — | 0.5 | M800-B-11 | — | — | — |
| V | Neutral/clutch switch | — | W32 | — | 0.5 | M800-A-16 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| D | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Crank position (CAS NE) | — | W14 | — | 0.5 | M800-B-1 | — | — | — |
| F | AFM ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Cam position (CAS G) | — | W15 | — | 0.5 | M800-B-2 | — | — | — |
| I | Tachometer output | — | W23 | — | 0.5 | M800-A-1 | — | — | — |
| K | +5V sensor supply | — | W13 | — | 0.5 | M800-A-2 | — | — | — |
| L | Idle switch (TPS) | — | W33 | — | 0.5 | M800-A-17 | — | — | — |
| N | O2 sensor | — | W25 | — | 0.5 | M800-A-15 | — | — | — |
| O | Air flow meter (AFM) | — | W24 | — | 0.5 | M800-A-14 | — | — | — |
| P | Intake air temperature (IAT) | — | W27 | — | 0.5 | M800-B-4 | — | — | — |
| Q | Coolant temperature (ECT) | — | W26 | — | 0.5 | M800-B-3 | — | — | — |
| U | Injector 1 | — | W18 | — | 0.5 | M800-A-19 | — | — | — |
| V | Injector 2 | — | W19 | — | 0.5 | M800-A-20 | — | — | — |
| Y | Injector 3 | — | W20 | — | 0.5 | M800-A-21 | — | — | — |
| Z | Injector 4 | — | W21 | — | 0.5 | M800-A-22 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | OEM-2-F | — | — | — |
| 1 | — | — | W10 | — | 0.5 | M800-B-14 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | M800-B-15 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | M800-B-16 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | M800-A-26 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.85 | OEM-2-A | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-2-B | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-2-C | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-2-D | — | — | — |
| 1 | — | — | W7 | — | 0.85 | M800-A-10 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | M800-A-11 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-A | Constant +12V | power_in | — | — | — | single_source | |
| OEM-1-B | ECU power +14V (main relay) | power_in | M800-A-26 | VBAT Battery Positive | power_in | single_source | |
| OEM-1-C | Start signal | digital_in | M800-B-8 | Digital Input 1 | digital_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | M800-A-18 | AUX1 | switch_out | single_source | |
| OEM-1-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | M800-A-3 | IGN1 | ignition_out | single_source | |
| OEM-1-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | M800-A-4 | IGN2 | ignition_out | single_source | |
| OEM-1-N | Wide-open throttle switch | digital_in | M800-B-9 | Digital Input 2 | digital_in | single_source | |
| OEM-1-P | Power steering pressure switch | digital_in | M800-B-10 | Digital Input 3 | digital_in | single_source | |
| OEM-1-Q | A/C request | digital_in | M800-B-11 | Digital Input 4 | digital_in | single_source | |
| OEM-1-V | Neutral/clutch switch | digital_in | M800-A-16 | Analog Voltage Input 3 | analog_in | single_source | |
| OEM-2-A | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-2-B | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-2-C | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-2-D | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-2-E | Crank position (CAS NE) | trigger_in | M800-B-1 | Crank Reference Timing Input | trigger_in | single_source | |
| OEM-2-F | AFM ground | sensor_ground | M800-B-14 + M800-B-15 + M800-B-16 | 0V Comms Reference + 0V Auxiliary Sensor Supply + 0V Engine Sensor Supply | sensor_ground | single_source | |
| OEM-2-G | Cam position (CAS G) | trigger_in | M800-B-2 | Cam Sync Timing Input | trigger_in | single_source | |
| OEM-2-I | Tachometer output | tacho_out | M800-A-1 | AUX2 | switch_out | single_source | |
| OEM-2-K | +5V sensor supply | vref | M800-A-2 | 5V Engine Sensor Supply | vref | single_source | |
| OEM-2-L | Idle switch (TPS) | digital_in | M800-A-17 | Analog Voltage Input 4 | analog_in | single_source | |
| OEM-2-N | O2 sensor | lambda_nb_in | M800-A-15 | Analog Voltage Input 2 | analog_in | single_source | |
| OEM-2-O | Air flow meter (AFM) | analog_in | M800-A-14 | AV1 | analog_in | single_source | |
| OEM-2-P | Intake air temperature (IAT) | temp_in | M800-B-4 | Analog Temperature Input 2 | temp_in | single_source | |
| OEM-2-Q | Coolant temperature (ECT) | temp_in | M800-B-3 | Analog Temperature Input 1 | temp_in | single_source | |
| OEM-2-U | Injector 1 | injector_out | M800-A-19 | INJ1 | injector_out | single_source | |
| OEM-2-V | Injector 2 | injector_out | M800-A-20 | INJ2 | injector_out | single_source | |
| OEM-2-Y | Injector 3 | injector_out | M800-A-21 | INJ3 | injector_out | single_source | |
| OEM-2-Z | Injector 4 | injector_out | M800-A-22 | INJ4 | 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 | M800-A-26 | 0.85 | no route | VBAT Battery Positive | — | |
| W3 | OEM-2-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W4 | OEM-2-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-2-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-2-D | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | SP-GND-1 | M800-A-10 | 0.85 | no route | GND Battery Negative | — | |
| W8 | SP-GND-1 | M800-A-11 | 0.85 | no route | GND Battery Negative | — | |
| W9 | OEM-2-F | SP-0V-1 | 0.5 | no route | AFM ground | — | |
| W10 | SP-0V-1 | M800-B-14 | 0.5 | no route | 0V Comms Reference | — | |
| W11 | SP-0V-1 | M800-B-15 | 0.5 | no route | 0V Auxiliary Sensor Supply | — | |
| W12 | SP-0V-1 | M800-B-16 | 0.5 | no route | 0V Engine Sensor Supply | — | |
| W13 | OEM-2-K | M800-A-2 | 0.5 | no route | +5V sensor supply | — | |
| W14 | OEM-2-E | M800-B-1 | 0.5 | no route | Crank position (CAS NE) | — | |
| W15 | OEM-2-G | M800-B-2 | 0.5 | no route | Cam position (CAS G) | — | |
| W16 | OEM-1-G | M800-A-3 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W17 | OEM-1-H | M800-A-4 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W18 | OEM-2-U | M800-A-19 | 0.5 | no route | Injector 1 | — | |
| W19 | OEM-2-V | M800-A-20 | 0.5 | no route | Injector 2 | — | |
| W20 | OEM-2-Y | M800-A-21 | 0.5 | no route | Injector 3 | — | |
| W21 | OEM-2-Z | M800-A-22 | 0.5 | no route | Injector 4 | — | |
| W22 | OEM-1-E | M800-A-18 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W23 | OEM-2-I | M800-A-1 | 0.5 | no route | Tachometer output | — | |
| W24 | OEM-2-O | M800-A-14 | 0.5 | no route | Air flow meter (AFM) | — | |
| W25 | OEM-2-N | M800-A-15 | 0.5 | no route | O2 sensor | — | |
| W26 | OEM-2-Q | M800-B-3 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W27 | OEM-2-P | M800-B-4 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W28 | OEM-1-C | M800-B-8 | 0.5 | no route | Start signal | — | |
| W29 | OEM-1-N | M800-B-9 | 0.5 | no route | Wide-open throttle switch | — | |
| W30 | OEM-1-P | M800-B-10 | 0.5 | no route | Power steering pressure switch | — | |
| W31 | OEM-1-Q | M800-B-11 | 0.5 | no route | A/C request | — | |
| W32 | OEM-1-V | M800-A-16 | 0.5 | no route | Neutral/clutch switch | — | |
| W33 | OEM-2-L | M800-A-17 | 0.5 | no route | Idle switch (TPS) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 3-1437290-7 | TE | Superseal 1.0 26-way plug | 1.000 | ea |
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
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-1-V ↔ M800-A-16 | OEM-1-V "Neutral/clutch switch" [digital_in] is wired to M800-A-16 "Analog Voltage Input 3" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-2-L ↔ M800-A-17 | OEM-2-L "Idle switch (TPS)" [digital_in] is wired to M800-A-17 "Analog Voltage Input 4" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| info | NET_FAMILY | OEM-1-E ↔ M800-A-18 | OEM-1-E "Malfunction indicator lamp (MIL)" [low_side_out] is wired to M800-A-18 "AUX1" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-I ↔ M800-A-1 | OEM-2-I "Tachometer output" [tacho_out] is wired to M800-A-1 "AUX2" [switch_out]. Frequency output on a general output: set it up as a tacho/frequency output with the right pull-up. |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-1-A | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-04. Review every wire against both manuals before building. Not wired: - OEM-1 A: Constant +12V: MoTeC M800 has no battery-constant input; not needed
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 M400/M600/M800/M880 Manual — Appendix L: Pin list by Function | https://starracecars.com/wp-content/uploads/resources/M400_M600_M800_M880_Manual_A5.pdf |
| 4 | vendor_doc | MoTeC M800 OEM WRX56 Installation | https://motec.com.au |