MX-5 Miata NB2 2001-05 (BP-Z3, VVT) → MoTeC M800 universal (auto)
MX-5 Miata NB2 2001-05 (BP-Z3, VVT) — MoTeC — M800
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 | 47 wires · 8 connectors · 3 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Terminals | 3-1447221-4 |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | M800-A-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-4-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | M800-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | M800-A-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-4-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-0V-1 | M800-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | M800-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | M800-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-4-L | M800-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-3-Y | M800-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-3-V | M800-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-3-F | M800-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-3-I | M800-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-2-A | M800-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-D | M800-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-G | M800-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-J | M800-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-2-B | M800-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-2-C | M800-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-2-K | M800-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-2-M | M800-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-H | M800-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-3-J | M800-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-3-P | M800-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-Q | M800-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-E | M800-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-F | M800-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-H | M800-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-I | M800-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-4-X | M800-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-4-V | M800-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-4-AA | M800-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-4-W | M800-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-4-P | M800-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-4-N | M800-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-4-AD | M800-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-3-T | M800-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-3-S | M800-B-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-4-B | M800-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-4-C | M800-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-4-F | M800-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-4-H | M800-B-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-4-I | M800-B-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 | M800-A-2 | M800-B-14 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 2 | M800-A-26 | M800-A-10 | open (OL) | +12 V supply must not touch power ground | |
| 3 | M800-A-26 | M800-B-14 | open (OL) | +12 V supply must not touch sensor ground | |
| 4 | M800-A-10 | M800-A-2 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | M800-A-26 | M800-A-2 | open (OL) | +12 V supply must not touch 5 V sensor reference |
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-C | — | — | — |
| 2 | 5V Engine Sensor Supply | — | W13 | — | 0.5 | OEM-4-L | — | — | — |
| 3 | IGN1 | — | W16 | — | 0.5 | OEM-3-F | — | — | — |
| 4 | IGN2 | — | W17 | — | 0.5 | OEM-3-I | — | — | — |
| 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 | — | W34 | — | 0.5 | OEM-4-X | — | — | — |
| 15 | Analog Voltage Input 2 | — | W35 | — | 0.5 | OEM-4-V | — | — | — |
| 16 | Analog Voltage Input 3 | — | W36 | — | 0.5 | OEM-4-AA | — | — | — |
| 17 | Analog Voltage Input 4 | — | W37 | — | 0.5 | OEM-4-W | — | — | — |
| 18 | AUX1 | — | W22 | — | 0.5 | OEM-2-B | — | — | — |
| 19 | INJ1 | — | W18 | — | 0.5 | OEM-2-A | — | — | — |
| 20 | INJ2 | — | W19 | — | 0.5 | OEM-2-D | — | — | — |
| 21 | INJ3 | — | W20 | — | 0.5 | OEM-2-G | — | — | — |
| 22 | INJ4 | — | W21 | — | 0.5 | OEM-2-J | — | — | — |
| 23 | AUX3 | — | W24 | — | 0.5 | OEM-2-K | — | — | — |
| 24 | AUX4 | — | W25 | — | 0.5 | OEM-2-M | — | — | — |
| 25 | Analog Voltage Input 5 | — | W40 | — | 0.5 | OEM-4-AD | — | — | — |
| 26 | VBAT Battery Positive | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | INJ5 | — | W30 | — | 0.5 | OEM-2-E | — | — | — |
| 28 | INJ6 | — | W31 | — | 0.5 | OEM-2-F | — | — | — |
| 29 | INJ7 | — | W32 | — | 0.5 | OEM-2-H | — | — | — |
| 30 | INJ8 | — | W33 | — | 0.5 | OEM-2-I | — | — | — |
| 31 | AUX5 | — | W26 | — | 0.5 | OEM-3-H | — | — | — |
| 32 | AUX6 | — | W27 | — | 0.5 | OEM-3-J | — | — | — |
| 33 | AUX7 | — | W28 | — | 0.5 | OEM-3-P | — | — | — |
| 34 | AUX8 | — | W29 | — | 0.5 | OEM-2-Q | — | — | — |
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-3-Y | — | — | — |
| 2 | Cam Sync Timing Input | — | W15 | — | 0.5 | OEM-3-V | — | — | — |
| 3 | Analog Temperature Input 1 | — | W38 | — | 0.5 | OEM-4-P | — | — | — |
| 4 | Analog Temperature Input 2 | — | W39 | — | 0.5 | OEM-4-N | — | — | — |
| 5 | Analog Temperature Input 3 | — | — | — | — | — | — | — | — |
| 6 | Analog Temperature Input 4 | — | — | — | — | — | — | — | — |
| 7 | Analog Temperature Input 5 | — | — | — | — | — | — | — | — |
| 8 | Digital Input 1 | — | W41 | — | 0.5 | OEM-3-T | — | — | — |
| 9 | Digital Input 2 | — | W42 | — | 0.5 | OEM-3-S | — | — | — |
| 10 | Digital Input 3 | — | W43 | — | 0.5 | OEM-4-B | — | — | — |
| 11 | Digital Input 4 | — | W44 | — | 0.5 | OEM-4-C | — | — | — |
| 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 | — | W45 | — | 0.5 | OEM-4-F | — | — | — |
| 21 | AV7 | — | W46 | — | 0.5 | OEM-4-H | — | — | — |
| 22 | AV8 | — | W47 | — | 0.5 | OEM-4-I | — | — | — |
| 23 | CAN Bus High | — | — | — | — | — | — | — | — |
| 24 | CAN Bus Low | — | — | — | — | — | — | — | — |
| 25 | Lambda1 Sense Voltage | — | — | — | — | — | — | — | — |
| 26 | Lambda1 Pump Current | — | — | — | — | — | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Injector 1 | — | W18 | — | 0.5 | M800-A-19 | — | — | — |
| B | Cooling fan relay | — | W22 | — | 0.5 | M800-A-18 | — | — | — |
| C | Condenser fan relay | — | W23 | — | 0.5 | M800-A-1 | — | — | — |
| D | Injector 2 | — | W19 | — | 0.5 | M800-A-20 | — | — | — |
| E | EGR valve | — | W30 | — | 0.5 | M800-A-27 | — | — | — |
| F | EGR valve | — | W31 | — | 0.5 | M800-A-28 | — | — | — |
| G | Injector 3 | — | W20 | — | 0.5 | M800-A-21 | — | — | — |
| H | EGR valve | — | W32 | — | 0.5 | M800-A-29 | — | — | — |
| I | EGR valve | — | W33 | — | 0.5 | M800-A-30 | — | — | — |
| J | Injector 4 | — | W21 | — | 0.5 | M800-A-22 | — | — | — |
| K | A/C clutch relay | — | W24 | — | 0.5 | M800-A-23 | — | — | — |
| M | Fuel pump relay | — | W25 | — | 0.5 | M800-A-24 | — | — | — |
| N | VTCS solenoid (intake butterflies) | — | — | — | — | — | — | — | — |
| P | ISC valve +14V feed | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| Q | ISC valve low side | — | W29 | — | 0.5 | M800-A-34 | — | — | — |
| R | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| D | EGR boost solenoid | — | — | — | — | — | — | — | — |
| E | Charcoal canister purge | — | — | — | — | — | — | — | — |
| F | Ignition 1 (coils 1+4, wasted spark) | — | W16 | — | 0.5 | M800-A-3 | — | — | — |
| H | Main relay | — | W26 | — | 0.5 | M800-A-31 | — | — | — |
| I | Ignition 2 (coils 2+3, wasted spark) | — | W17 | — | 0.5 | M800-A-4 | — | — | — |
| J | Front O2 heater | — | W27 | — | 0.5 | M800-A-32 | — | — | — |
| M | Alternator control | — | — | — | — | — | — | — | — |
| O | Tachometer output | — | — | — | — | — | — | — | — |
| P | Rear O2 heater | — | W28 | — | 0.5 | M800-A-33 | — | — | — |
| S | Immobiliser | — | W42 | — | 0.5 | M800-B-9 | — | — | — |
| T | Vehicle speed | — | W41 | — | 0.5 | M800-B-8 | — | — | — |
| U | Charge lamp | — | — | — | — | — | — | — | — |
| V | Cam position (CMP) | — | W15 | — | 0.5 | M800-B-2 | — | — | — |
| Y | Crank position (CKP) | — | W14 | — | 0.5 | M800-B-1 | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| AA | Rear O2 signal | — | W36 | — | 0.5 | M800-A-16 | — | — | — |
| AD | Fuel level | — | W40 | — | 0.5 | M800-A-25 | — | — | — |
| AF | ECU power +14V (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| AG | Constant +12V | — | — | — | — | — | — | — | — |
| B | Brake switch | — | W43 | — | 0.5 | M800-B-10 | — | — | — |
| C | Power steering pressure switch | — | W44 | — | 0.5 | M800-B-11 | — | — | — |
| D | VVT oil-control solenoid | — | — | — | — | — | — | — | — |
| F | A/C request | — | W45 | — | 0.5 | M800-B-20 | — | — | — |
| H | Neutral switch | — | W46 | — | 0.5 | M800-B-21 | — | — | — |
| I | Clutch switch | — | W47 | — | 0.5 | M800-B-22 | — | — | — |
| J | VTCS vacuum switch | — | — | — | — | — | — | — | — |
| L | +5V sensor supply | — | W13 | — | 0.5 | M800-A-2 | — | — | — |
| M | Knock sensor | — | — | — | — | — | — | — | — |
| N | Intake air temperature (IAT) | — | W39 | — | 0.5 | M800-B-4 | — | — | — |
| O | Signal ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Coolant temperature (ECT) | — | W38 | — | 0.5 | M800-B-3 | — | — | — |
| V | Throttle position (TPS) | — | W35 | — | 0.5 | M800-A-15 | — | — | — |
| W | Front O2 signal | — | W37 | — | 0.5 | M800-A-17 | — | — | — |
| X | Mass air flow (MAF) | — | W34 | — | 0.5 | M800-A-14 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | OEM-4-O | — | — | — |
| 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-2-P | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-4-AF | — | — | — |
| 1 | — | — | W3 | — | 0.85 | M800-A-26 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-4-A | — | — | — |
| 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-2-A | Injector 1 | injector_out | M800-A-19 | INJ1 | injector_out | single_source | |
| OEM-2-B | Cooling fan relay | low_side_out | M800-A-18 | AUX1 | switch_out | single_source | |
| OEM-2-C | Condenser fan relay | low_side_out | M800-A-1 | AUX2 | switch_out | single_source | |
| OEM-2-D | Injector 2 | injector_out | M800-A-20 | INJ2 | injector_out | single_source | |
| OEM-2-E | EGR valve | low_side_out | M800-A-27 | INJ5 | injector_out | single_source | |
| OEM-2-F | EGR valve | low_side_out | M800-A-28 | INJ6 | injector_out | single_source | |
| OEM-2-G | Injector 3 | injector_out | M800-A-21 | INJ3 | injector_out | single_source | |
| OEM-2-H | EGR valve | low_side_out | M800-A-29 | INJ7 | injector_out | single_source | |
| OEM-2-I | EGR valve | low_side_out | M800-A-30 | INJ8 | injector_out | single_source | |
| OEM-2-J | Injector 4 | injector_out | M800-A-22 | INJ4 | injector_out | single_source | |
| OEM-2-K | A/C clutch relay | low_side_out | M800-A-23 | AUX3 | switch_out | single_source | |
| OEM-2-M | Fuel pump relay | low_side_out | M800-A-24 | AUX4 | switch_out | single_source | |
| OEM-2-N | VTCS solenoid (intake butterflies) | low_side_out | — | — | — | single_source | |
| OEM-2-P | ISC valve +14V feed | power_in | M800-A-26 | VBAT Battery Positive | power_in | single_source | |
| OEM-2-Q | ISC valve low side | low_side_out | M800-A-34 | AUX8 | switch_out | single_source | |
| OEM-2-R | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | single_source | |
| OEM-3-A | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-3-B | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-3-D | EGR boost solenoid | low_side_out | — | — | — | single_source | |
| OEM-3-E | Charcoal canister purge | low_side_out | — | — | — | single_source | |
| OEM-3-F | Ignition 1 (coils 1+4, wasted spark) | ignition_out | M800-A-3 | IGN1 | ignition_out | single_source | |
| OEM-3-H | Main relay | low_side_out | M800-A-31 | AUX5 | switch_out | single_source | |
| OEM-3-I | Ignition 2 (coils 2+3, wasted spark) | ignition_out | M800-A-4 | IGN2 | ignition_out | single_source | |
| OEM-3-J | Front O2 heater | low_side_out | M800-A-32 | AUX6 | switch_out | single_source | |
| OEM-3-M | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-3-O | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-3-P | Rear O2 heater | low_side_out | M800-A-33 | AUX7 | switch_out | single_source | |
| OEM-3-S | Immobiliser | digital_in | M800-B-9 | Digital Input 2 | digital_in | single_source | |
| OEM-3-T | Vehicle speed | digital_in | M800-B-8 | Digital Input 1 | digital_in | single_source | |
| OEM-3-U | Charge lamp | low_side_out | — | — | — | single_source | |
| OEM-3-V | Cam position (CMP) | trigger_in | M800-B-2 | Cam Sync Timing Input | trigger_in | single_source | |
| OEM-3-Y | Crank position (CKP) | trigger_in | M800-B-1 | Crank Reference Timing Input | trigger_in | single_source | |
| OEM-4-A | Power ground | ground | M800-A-10 + M800-A-11 | GND Battery Negative + GND Battery Negative | ground | single_source | |
| OEM-4-AA | Rear O2 signal | lambda_nb_in | M800-A-16 | Analog Voltage Input 3 | analog_in | single_source | |
| OEM-4-AD | Fuel level | analog_in | M800-A-25 | Analog Voltage Input 5 | analog_in | single_source | |
| OEM-4-AF | ECU power +14V (main relay) | power_in | M800-A-26 | VBAT Battery Positive | power_in | single_source | |
| OEM-4-AG | Constant +12V | power_in | — | — | — | single_source | |
| OEM-4-B | Brake switch | digital_in | M800-B-10 | Digital Input 3 | digital_in | single_source | |
| OEM-4-C | Power steering pressure switch | digital_in | M800-B-11 | Digital Input 4 | digital_in | single_source | |
| OEM-4-D | VVT oil-control solenoid | low_side_out | — | — | — | single_source | |
| OEM-4-F | A/C request | digital_in | M800-B-20 | Analog Voltage Input 6 | analog_in | single_source | |
| OEM-4-H | Neutral switch | digital_in | M800-B-21 | AV7 | analog_in | single_source | |
| OEM-4-I | Clutch switch | digital_in | M800-B-22 | AV8 | analog_in | single_source | |
| OEM-4-J | VTCS vacuum switch | digital_in | — | — | — | single_source | |
| OEM-4-L | +5V sensor supply | vref | M800-A-2 | 5V Engine Sensor Supply | vref | single_source | |
| OEM-4-M | Knock sensor | knock_in | — | — | — | single_source | |
| OEM-4-N | Intake air temperature (IAT) | temp_in | M800-B-4 | Analog Temperature Input 2 | temp_in | single_source | |
| OEM-4-O | Signal 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-4-P | Coolant temperature (ECT) | temp_in | M800-B-3 | Analog Temperature Input 1 | temp_in | single_source | |
| OEM-4-V | Throttle position (TPS) | analog_in | M800-A-15 | Analog Voltage Input 2 | analog_in | single_source | |
| OEM-4-W | Front O2 signal | lambda_nb_in | M800-A-17 | Analog Voltage Input 4 | analog_in | single_source | |
| OEM-4-X | Mass air flow (MAF) | analog_in | M800-A-14 | AV1 | analog_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W3 | SP-14V-1 | M800-A-26 | 0.85 | no route | VBAT Battery Positive | — | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-4-A | 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-4-O | SP-0V-1 | 0.5 | no route | Signal 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-4-L | M800-A-2 | 0.5 | no route | +5V sensor supply | — | |
| W14 | OEM-3-Y | M800-B-1 | 0.5 | no route | Crank position (CKP) | — | |
| W15 | OEM-3-V | M800-B-2 | 0.5 | no route | Cam position (CMP) | — | |
| W16 | OEM-3-F | M800-A-3 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W17 | OEM-3-I | M800-A-4 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W18 | OEM-2-A | M800-A-19 | 0.5 | no route | Injector 1 | — | |
| W19 | OEM-2-D | M800-A-20 | 0.5 | no route | Injector 2 | — | |
| W20 | OEM-2-G | M800-A-21 | 0.5 | no route | Injector 3 | — | |
| W21 | OEM-2-J | M800-A-22 | 0.5 | no route | Injector 4 | — | |
| W22 | OEM-2-B | M800-A-18 | 0.5 | no route | Cooling fan relay | — | |
| W23 | OEM-2-C | M800-A-1 | 0.5 | no route | Condenser fan relay | — | |
| W24 | OEM-2-K | M800-A-23 | 0.5 | no route | A/C clutch relay | — | |
| W25 | OEM-2-M | M800-A-24 | 0.5 | no route | Fuel pump relay | — | |
| W26 | OEM-3-H | M800-A-31 | 0.5 | no route | Main relay | — | |
| W27 | OEM-3-J | M800-A-32 | 0.5 | no route | Front O2 heater | — | |
| W28 | OEM-3-P | M800-A-33 | 0.5 | no route | Rear O2 heater | — | |
| W29 | OEM-2-Q | M800-A-34 | 0.5 | no route | ISC valve low side | — | |
| W30 | OEM-2-E | M800-A-27 | 0.5 | no route | EGR valve | — | |
| W31 | OEM-2-F | M800-A-28 | 0.5 | no route | EGR valve | — | |
| W32 | OEM-2-H | M800-A-29 | 0.5 | no route | EGR valve | — | |
| W33 | OEM-2-I | M800-A-30 | 0.5 | no route | EGR valve | — | |
| W34 | OEM-4-X | M800-A-14 | 0.5 | no route | Mass air flow (MAF) | — | |
| W35 | OEM-4-V | M800-A-15 | 0.5 | no route | Throttle position (TPS) | — | |
| W36 | OEM-4-AA | M800-A-16 | 0.5 | no route | Rear O2 signal | — | |
| W37 | OEM-4-W | M800-A-17 | 0.5 | no route | Front O2 signal | — | |
| W38 | OEM-4-P | M800-B-3 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W39 | OEM-4-N | M800-B-4 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W40 | OEM-4-AD | M800-A-25 | 0.5 | no route | Fuel level | — | |
| W41 | OEM-3-T | M800-B-8 | 0.5 | no route | Vehicle speed | — | |
| W42 | OEM-3-S | M800-B-9 | 0.5 | no route | Immobiliser | — | |
| W43 | OEM-4-B | M800-B-10 | 0.5 | no route | Brake switch | — | |
| W44 | OEM-4-C | M800-B-11 | 0.5 | no route | Power steering pressure switch | — | |
| W45 | OEM-4-F | M800-B-20 | 0.5 | no route | A/C request | — | |
| W46 | OEM-4-H | M800-B-21 | 0.5 | no route | Neutral switch | — | |
| W47 | OEM-4-I | M800-B-22 | 0.5 | no route | Clutch switch | — |
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 |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 41.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (22)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | LOAD_UNKNOWN | M800-A-1 | M800-A-1 "AUX2" drives OEM-2-C Condenser fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | M800-A-18 | M800-A-18 "AUX1" drives OEM-2-B Cooling fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | M800-A-23 | M800-A-23 "AUX3" drives OEM-2-K A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | M800-A-24 | M800-A-24 "AUX4" drives OEM-2-M Fuel pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | M800-A-31 | M800-A-31 "AUX5" drives OEM-3-H Main relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | M800-A-34 | M800-A-34 "AUX8" drives OEM-2-Q ISC valve low side (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-4-F ↔ M800-B-20 | OEM-4-F "A/C request" [digital_in] is wired to M800-B-20 "Analog Voltage Input 6" [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-4-H ↔ M800-B-21 | OEM-4-H "Neutral switch" [digital_in] is wired to M800-B-21 "AV7" [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-4-I ↔ M800-B-22 | OEM-4-I "Clutch switch" [digital_in] is wired to M800-B-22 "AV8" [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-2-B ↔ M800-A-18 | OEM-2-B "Cooling fan relay" [low_side_out] is wired to M800-A-18 "AUX1" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-C ↔ M800-A-1 | OEM-2-C "Condenser fan relay" [low_side_out] is wired to M800-A-1 "AUX2" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-E ↔ M800-A-27 | OEM-2-E "EGR valve" [low_side_out] is wired to M800-A-27 "INJ5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-F ↔ M800-A-28 | OEM-2-F "EGR valve" [low_side_out] is wired to M800-A-28 "INJ6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-H ↔ M800-A-29 | OEM-2-H "EGR valve" [low_side_out] is wired to M800-A-29 "INJ7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-I ↔ M800-A-30 | OEM-2-I "EGR valve" [low_side_out] is wired to M800-A-30 "INJ8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-K ↔ M800-A-23 | OEM-2-K "A/C clutch relay" [low_side_out] is wired to M800-A-23 "AUX3" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-M ↔ M800-A-24 | OEM-2-M "Fuel pump relay" [low_side_out] is wired to M800-A-24 "AUX4" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-Q ↔ M800-A-34 | OEM-2-Q "ISC valve low side" [low_side_out] is wired to M800-A-34 "AUX8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-3-H ↔ M800-A-31 | OEM-3-H "Main relay" [low_side_out] is wired to M800-A-31 "AUX5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-3-J ↔ M800-A-32 | OEM-3-J "Front O2 heater" [low_side_out] is wired to M800-A-32 "AUX6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-3-P ↔ M800-A-33 | OEM-3-P "Rear O2 heater" [low_side_out] is wired to M800-A-33 "AUX7" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 10 optional OEM pins are not mapped: OEM-2-N VTCS solenoid (intake butterflies); OEM-2-R Malfunction indicator lamp (MIL); OEM-3-D EGR boost solenoid; OEM-3-E Charcoal canister purge; OEM-3-M Alternator control; OEM-3-O Tachometer output; OEM-3-U Charge lamp; OEM-4-D VVT oil-control solenoid; OEM-4-J VTCS vacuum switch; OEM-4-M Knock sensor |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-4-AG | 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 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-4 AG: Constant +12V: MoTeC M800 has no battery-constant input; not needed - OEM-4 M: Knock sensor: no free knock input on MoTeC M800 - OEM-2 N: VTCS solenoid (intake butterflies): no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-2 R: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-3 D: EGR boost solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-3 E: Charcoal canister purge: no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-3 M: Alternator control: no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-3 U: Charge lamp: no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-4 D: VVT oil-control solenoid: no free low_side/ls_hs/injector/hbridge on MoTeC M800 - OEM-3 O: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M800 - OEM-4 J: VTCS vacuum switch: no free switch_in/frequency_in/analog_0_5 on MoTeC M800
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Link G4X MX5NB2X install manual (NB2 2001-05) | https://linkecu.com/documentation/MX5XNB2.pdf | archive | 2026-10-05 | 741efdd9f2c8 |
| 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 | archive | 2026-10-05 | b69bb8ffb674 |
| 4 | vendor_doc | MoTeC M800 OEM WRX56 Installation | https://motec.com.au | archive | 2026-10-05 | 2ca4be92bb65 |