Toyota Supra A70 1986-92 (7M-GTE) → MoTeC M190 13190 (auto)
Toyota Supra A70 1986-92 (7M-GTE) — MoTeC — M190
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-20
Before you start
Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 31 wires · 11 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 | NEW-KEYON-1 | MAIN-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | NEW-BATT-1 | MAIN-R-IN | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | MAIN-R-COIL- | SP-GND-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | MAIN-R-OUT | M190-B-H | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | MAIN-R-OUT | M190-B-J | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | MAIN-R-OUT | M190-B-K | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | MAIN-R-OUT | M190-B-L | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-A-26 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | M190-B-G | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | M190-B-W | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | M190-B-X | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | M190-B-Y | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | M190-B-Z | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-GND-1 | M190-B-c | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-B-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | M190-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | M190-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | M190-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | M190-C-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | M190-C-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | M190-C-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | SP-0V-1 | M190-C-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-A-12 | M190-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-11 | M190-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-25 | M190-B-U | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-B-11 | M190-C-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-B-4 | M190-C-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-B-2 | M190-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-6 | M190-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B-3 | M190-C-39 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-D-9 | M190-C-32 | 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 | M190-A-18 | M190-B-H | open (OL) | sensor ground must not touch +12 V supply | |
| 2 | M190-A-18 | NEW-BATT-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 3 | M190-A-18 | NEW-KEYON-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | M190-B-G | M190-B-H | open (OL) | power ground must not touch +12 V supply | |
| 5 | M190-B-G | NEW-BATT-1 | open (OL) | power ground must not touch +12 V supply | |
| 6 | M190-B-G | NEW-KEYON-1 | open (OL) | power ground must not touch +12 V supply |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
M190-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Low Side Injector 3 | — | — | — | — | — | — | — | — |
| 10 | Low Side Injector 8 | — | — | — | — | — | — | — | — |
| 11 | Peak Hold Injector 1 | — | W23 | — | 0.5 | OEM-A-12 | — | — | — |
| 12 | Peak Hold Injector 2 | — | — | — | — | — | — | — | — |
| 13 | Analogue Voltage Input 11 | — | — | — | — | — | — | — | — |
| 14 | Digital Input 2 | — | — | — | — | — | — | — | — |
| 15 | RS232 Receive | — | — | — | — | — | — | — | — |
| 16 | Sensor 5.0V C3 | — | — | — | — | — | — | — | — |
| 17 | Low Side Injector 11 | — | — | — | — | — | — | — | — |
| 18 | Sensor 0V C1 | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 0V C2 | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Low Side Injector 2 | — | — | — | — | — | — | — | — |
| 20 | Sensor 0V C3 | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 21 | Digital Input 1 | — | — | — | — | — | — | — | — |
| 22 | LIN Bus | — | — | — | — | — | — | — | — |
| 23 | RS232 Transmit | — | — | — | — | — | — | — | — |
| 24 | CAN Bus 2 High | — | — | — | — | — | — | — | — |
| 25 | Low Side Injector 7 | — | — | — | — | — | — | — | — |
| 26 | Peak Hold Injector 3 | — | — | — | — | — | — | — | — |
| 27 | Analogue Voltage Input 15 | — | — | — | — | — | — | — | — |
| 28 | Analogue Voltage Input 16 | — | — | — | — | — | — | — | — |
| 29 | Analogue Voltage Input 17 | — | — | — | — | — | — | — | — |
| 3 | Low Side Injector 1 | — | W24 | — | 0.5 | OEM-A-11 | — | — | — |
| 30 | Digital Input 3 | — | — | — | — | — | — | — | — |
| 31 | CAN Bus 2 Low | — | — | — | — | — | — | — | — |
| 32 | Low Side Injector 10 | — | — | — | — | — | — | — | — |
| 33 | Peak Hold Injector 4 | — | — | — | — | — | — | — | — |
| 34 | Analogue Voltage Input 13 | — | — | — | — | — | — | — | — |
| 35 | Analogue Voltage Input 12 | — | — | — | — | — | — | — | — |
| 36 | Peak Hold Injector 7 | — | — | — | — | — | — | — | — |
| 37 | Digital Input 4 | — | — | — | — | — | — | — | — |
| 38 | Battery Backup | — | — | — | — | — | — | — | — |
| 39 | CAN Bus 3 High | — | — | — | — | — | — | — | — |
| 4 | Low Side Injector 12 | — | — | — | — | — | — | — | — |
| 40 | Low Side Injector 6 | — | — | — | — | — | — | — | — |
| 41 | Analogue Voltage Input 14 | — | — | — | — | — | — | — | — |
| 42 | Peak Hold Injector 9 | — | — | — | — | — | — | — | — |
| 43 | Peak Hold Injector 10 | — | — | — | — | — | — | — | — |
| 44 | Peak Hold Injector 6 | — | — | — | — | — | — | — | — |
| 45 | Peak Hold Injector 5 | — | — | — | — | — | — | — | — |
| 46 | CAN Bus 3 Low | — | — | — | — | — | — | — | — |
| 47 | Low Side Injector 9 | — | — | — | — | — | — | — | — |
| 48 | Low Side Injector 5 | — | — | — | — | — | — | — | — |
| 49 | Peak Hold Injector 11 | — | — | — | — | — | — | — | — |
| 5 | Low Side Injector 4 | — | — | — | — | — | — | — | — |
| 50 | Peak Hold Injector 12 | — | — | — | — | — | — | — | — |
| 51 | Peak Hold Injector 8 | — | — | — | — | — | — | — | — |
| 52 | Low Side Ignition 12 | — | — | — | — | — | — | — | — |
| 53 | Low Side Ignition 9 | — | — | — | — | — | — | — | — |
| 54 | Low Side Ignition 10 | — | — | — | — | — | — | — | — |
| 55 | Low Side Ignition 11 | — | — | — | — | — | — | — | — |
| 6 | Lambda Narrow Input 2 | — | — | — | — | — | — | — | — |
| 7 | Lambda Narrow Input 1 | — | W29 | — | 0.5 | OEM-B-6 | — | — | — |
| 8 | Sensor 5.0V C1 | — | — | — | — | — | — | — | — |
| 9 | Sensor 5.0V C2 | — | — | — | — | — | — | — | — |
M190-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Half Bridge Output 1 | — | — | — | — | — | — | — | — |
| B | Half Bridge Output 2 | — | — | — | — | — | — | — | — |
| C | Half Bridge Output 3 | — | — | — | — | — | — | — | — |
| D | Half Bridge Output 4 | — | — | — | — | — | — | — | — |
| E | Half Bridge Output 5 | — | — | — | — | — | — | — | — |
| F | Half Bridge Output 6 | — | — | — | — | — | — | — | — |
| G | Battery Negative 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Battery Positive 1 | — | W4 | — | 0.85 | MAIN-R-OUT | — | — | — |
| J | Battery Positive 2 | — | W5 | — | 0.85 | MAIN-R-OUT | — | — | — |
| K | Battery Positive 3 | — | W6 | — | 0.85 | MAIN-R-OUT | — | — | — |
| L | Battery Positive 4 | — | W7 | — | 0.85 | MAIN-R-OUT | — | — | — |
| M | Half Bridge Output 10 | — | — | — | — | — | — | — | — |
| N | Half Bridge Output 9 | — | — | — | — | — | — | — | — |
| P | Half Bridge Output 8 | — | — | — | — | — | — | — | — |
| R | Half Bridge Output 7 | — | — | — | — | — | — | — | — |
| S | Low Side Injector 4 | — | — | — | — | — | — | — | — |
| T | Low Side Injector 6 | — | — | — | — | — | — | — | — |
| U | Low Side Injector 1 | — | W25 | — | 0.5 | OEM-A-25 | — | — | — |
| V | Low Side Injector 2 | — | — | — | — | — | — | — | — |
| W | Battery Negative 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| X | Battery Negative 3 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| Y | Battery Negative 4 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| Z | Battery Negative 5 | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| a | Low Side Injector 5 | — | — | — | — | — | — | — | — |
| b | Low Side Injector 3 | — | — | — | — | — | — | — | — |
| c | Battery Negative 6 | — | W14 | — | 0.85 | SP-GND-1 | — | — | — |
M190-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Low Side Ignition 4 | — | — | — | — | — | — | — | — |
| 10 | Universal Digital Input 8 | — | — | — | — | — | — | — | — |
| 11 | Analogue Voltage Input 6 | — | — | — | — | — | — | — | — |
| 12 | Analogue Voltage Input 7 | — | — | — | — | — | — | — | — |
| 13 | Analogue Voltage Input 9 | — | — | — | — | — | — | — | — |
| 14 | Sensor 0V A1 | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | Sensor 0V A2 | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Low Side Ignition 1 | — | — | — | — | — | — | — | — |
| 17 | Universal Digital Input 7 | — | — | — | — | — | — | — | — |
| 18 | Universal Digital Input 1 | — | W28 | — | 0.5 | OEM-B-2 | — | — | — |
| 19 | Universal Digital Input 12 | — | — | — | — | — | — | — | — |
| 2 | Low Side Ignition 3 | — | — | — | — | — | — | — | — |
| 20 | Universal Digital Input 11 | — | — | — | — | — | — | — | — |
| 21 | Universal Digital Input 10 | — | — | — | — | — | — | — | — |
| 22 | Universal Digital Input 9 | — | — | — | — | — | — | — | — |
| 23 | Sensor 0V B1 | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | CAN Bus 1 High | — | — | — | — | — | — | — | — |
| 25 | Universal Digital Input 3 | — | — | — | — | — | — | — | — |
| 26 | Ethernet Receive - | — | — | — | — | — | — | — | — |
| 27 | Universal Digital Input 4 | — | — | — | — | — | — | — | — |
| 28 | Analogue Voltage Input 4 | — | — | — | — | — | — | — | — |
| 29 | Analogue Voltage Input 5 | — | — | — | — | — | — | — | — |
| 3 | Low Side Ignition 8 | — | — | — | — | — | — | — | — |
| 30 | Sensor 0V B2 | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 31 | CAN Bus 1 Low | — | — | — | — | — | — | — | — |
| 32 | Universal Digital Input 2 | — | W31 | — | 0.5 | OEM-D-9 | — | — | — |
| 33 | Ethernet Receive + | — | — | — | — | — | — | — | — |
| 34 | Ethernet Transmit - | — | — | — | — | — | — | — | — |
| 35 | Analogue Voltage Input 3 | — | — | — | — | — | — | — | — |
| 36 | Analogue Voltage Input 2 | — | — | — | — | — | — | — | — |
| 37 | Analogue Temperature Input 1 | — | W27 | — | 0.5 | OEM-B-4 | — | — | — |
| 38 | Analogue Temperature Input 3 | — | — | — | — | — | — | — | — |
| 39 | Analogue Temperature Input 2 | — | W30 | — | 0.5 | OEM-B-3 | — | — | — |
| 4 | Low Side Ignition 6 | — | — | — | — | — | — | — | — |
| 40 | Universal Digital Input 5 | — | — | — | — | — | — | — | — |
| 41 | Ethernet Transmit + | — | — | — | — | — | — | — | — |
| 42 | Analogue Voltage Input 1 | — | W26 | — | 0.5 | OEM-B-11 | — | — | — |
| 43 | Knock Input 3 | — | — | — | — | — | — | — | — |
| 44 | Knock Input 2 | — | — | — | — | — | — | — | — |
| 45 | Analogue Temperature Input 5 | — | — | — | — | — | — | — | — |
| 46 | Analogue Temperature Input 4 | — | — | — | — | — | — | — | — |
| 47 | Universal Digital Input 6 | — | — | — | — | — | — | — | — |
| 48 | Sensor 5.0V A1 | — | — | — | — | — | — | — | — |
| 49 | Knock Input 4 | — | — | — | — | — | — | — | — |
| 5 | Low Side Ignition 5 | — | — | — | — | — | — | — | — |
| 50 | Sensor 5.0V B1 | — | — | — | — | — | — | — | — |
| 51 | Knock Input 1 | — | — | — | — | — | — | — | — |
| 52 | Analogue Temperature Input 6 | — | — | — | — | — | — | — | — |
| 53 | Sensor 5.0V A2 | — | — | — | — | — | — | — | — |
| 54 | Sensor 6.3V | — | — | — | — | — | — | — | — |
| 55 | Sensor 5.0V B2 | — | — | — | — | — | — | — | — |
| 6 | Analogue Voltage Input 8 | — | — | — | — | — | — | — | — |
| 7 | Analogue Voltage Input 10 | — | — | — | — | — | — | — | — |
| 8 | Low Side Ignition 2 | — | — | — | — | — | — | — | — |
| 9 | Low Side Ignition 7 | — | — | — | — | — | — | — | — |
MAIN-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (ignition-switched +12V) | — | W1 | — | 0.5 | NEW-KEYON-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W3 | — | 0.5 | SP-GND-1 | — | — | — |
| IN | Relay contact input (battery + via main fuse) | — | W2 | — | 0.85 | NEW-BATT-1 | — | — | — |
| OUT | Relay contact output (switched +12V bus) | — | W4 | — | 0.85 | M190-B-H | — | — | — |
| OUT | Relay contact output (switched +12V bus) | — | W5 | — | 0.85 | M190-B-J | — | — | — |
| OUT | Relay contact output (switched +12V bus) | — | W6 | — | 0.85 | M190-B-K | — | — | — |
| OUT | Relay contact output (switched +12V bus) | — | W7 | — | 0.85 | M190-B-L | — | — | — |
NEW-BATT
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W2 | — | 0.85 | MAIN-R-IN | — | — | — |
NEW-KEYON
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.5 | MAIN-R-COIL+ | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Injectors 2 & 6 (No.20) | — | W24 | — | 0.5 | M190-A-3 | — | — | — |
| 12 | Injectors 1 & 4 (No.10) | — | W23 | — | 0.5 | M190-A-11 | — | — | — |
| 25 | Injectors 3 & 5 (No.30) | — | W25 | — | 0.5 | M190-B-U | — | — | — |
| 26 | Power ground (E01/E02) | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Throttle position sensor (VTA) | — | W26 | — | 0.5 | M190-C-42 | — | — | — |
| 2 | Karman-vortex AFM signal (KS) | — | W28 | — | 0.5 | M190-C-18 | — | — | — |
| 3 | Intake air temp (THA) | — | W30 | — | 0.5 | M190-C-39 | — | — | — |
| 4 | Coolant temp (THW) | — | W27 | — | 0.5 | M190-C-37 | — | — | — |
| 6 | Primary O2 sensor (OX1) | — | W29 | — | 0.5 | M190-A-7 | — | — | — |
| 9 | Sensor ground (E2) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 9 | Vehicle speed sensor (SPD) | — | W31 | — | 0.5 | M190-C-32 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-B-9 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | M190-A-18 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | M190-A-19 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | M190-A-20 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | M190-C-14 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | M190-C-15 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | M190-C-23 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | M190-C-30 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.5 | MAIN-R-COIL- | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-A-26 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | M190-B-G | — | — | — |
| 1 | — | — | W10 | — | 0.85 | M190-B-W | — | — | — |
| 1 | — | — | W11 | — | 0.85 | M190-B-X | — | — | — |
| 1 | — | — | W12 | — | 0.85 | M190-B-Y | — | — | — |
| 1 | — | — | W13 | — | 0.85 | M190-B-Z | — | — | — |
| 1 | — | — | W14 | — | 0.85 | M190-B-c | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-11 | Injectors 2 & 6 (No.20) | injector_out | M190-A-3 | Low Side Injector 1 | injector_out | corroborated | |
| OEM-A-12 | Injectors 1 & 4 (No.10) | injector_out | M190-A-11 | Peak Hold Injector 1 | injector_out | corroborated | |
| OEM-A-25 | Injectors 3 & 5 (No.30) | injector_out | M190-B-U | Low Side Injector 1 | injector_out | corroborated | |
| OEM-A-26 | Power ground (E01/E02) | ground | M190-B-G + M190-B-W + M190-B-X + M190-B-Y + M190-B-Z + M190-B-c + MAIN-R-COIL- | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Battery Negative 6 + Relay coil negative (ECU low-side driver) | ground + load | corroborated | |
| OEM-B-11 | Throttle position sensor (VTA) | analog_in | M190-C-42 | Analogue Voltage Input 1 | analog_in | corroborated | |
| OEM-B-2 | Karman-vortex AFM signal (KS) | digital_in | M190-C-18 | Universal Digital Input 1 | digital_in | corroborated | |
| OEM-B-3 | Intake air temp (THA) | temp_in | M190-C-39 | Analogue Temperature Input 2 | temp_in | corroborated | |
| OEM-B-4 | Coolant temp (THW) | temp_in | M190-C-37 | Analogue Temperature Input 1 | temp_in | corroborated | |
| OEM-B-6 | Primary O2 sensor (OX1) | lambda_nb_in | M190-A-7 | Lambda Narrow Input 1 | lambda_nb_in | corroborated | |
| OEM-B-9 | Sensor ground (E2) | sensor_ground | M190-A-18 + M190-A-19 + M190-A-20 + M190-C-14 + M190-C-15 + M190-C-23 + M190-C-30 | Sensor 0V C1 + Sensor 0V C2 + Sensor 0V C3 + Sensor 0V A1 + Sensor 0V A2 + Sensor 0V B1 + Sensor 0V B2 | sensor_ground | corroborated | |
| OEM-D-9 | Vehicle speed sensor (SPD) | digital_in | M190-C-32 | Universal Digital Input 2 | digital_in | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | NEW-KEYON-1 | MAIN-R-COIL+ | 0.5 | no route | Relay coil positive (ignition-switched +12V) | — | |
| W2 | NEW-BATT-1 | MAIN-R-IN | 0.85 | no route | Relay contact input (battery + via main fuse) | — | |
| W3 | MAIN-R-COIL- | SP-GND-1 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W4 | MAIN-R-OUT | M190-B-H | 0.85 | no route | Relay contact output (switched +12V bus) | — | |
| W5 | MAIN-R-OUT | M190-B-J | 0.85 | no route | Relay contact output (switched +12V bus) | — | |
| W6 | MAIN-R-OUT | M190-B-K | 0.85 | no route | Relay contact output (switched +12V bus) | — | |
| W7 | MAIN-R-OUT | M190-B-L | 0.85 | no route | Relay contact output (switched +12V bus) | — | |
| W8 | OEM-A-26 | SP-GND-1 | 0.85 | no route | Power ground (E01/E02) | — | |
| W9 | SP-GND-1 | M190-B-G | 0.85 | no route | Battery Negative 1 | — | |
| W10 | SP-GND-1 | M190-B-W | 0.85 | no route | Battery Negative 2 | — | |
| W11 | SP-GND-1 | M190-B-X | 0.85 | no route | Battery Negative 3 | — | |
| W12 | SP-GND-1 | M190-B-Y | 0.85 | no route | Battery Negative 4 | — | |
| W13 | SP-GND-1 | M190-B-Z | 0.85 | no route | Battery Negative 5 | — | |
| W14 | SP-GND-1 | M190-B-c | 0.85 | no route | Battery Negative 6 | — | |
| W15 | OEM-B-9 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W16 | SP-0V-1 | M190-A-18 | 0.5 | no route | Sensor 0V C1 | — | |
| W17 | SP-0V-1 | M190-A-19 | 0.5 | no route | Sensor 0V C2 | — | |
| W18 | SP-0V-1 | M190-A-20 | 0.5 | no route | Sensor 0V C3 | — | |
| W19 | SP-0V-1 | M190-C-14 | 0.5 | no route | Sensor 0V A1 | — | |
| W20 | SP-0V-1 | M190-C-15 | 0.5 | no route | Sensor 0V A2 | — | |
| W21 | SP-0V-1 | M190-C-23 | 0.5 | no route | Sensor 0V B1 | — | |
| W22 | SP-0V-1 | M190-C-30 | 0.5 | no route | Sensor 0V B2 | — | |
| W23 | OEM-A-12 | M190-A-11 | 0.5 | no route | Injectors 1 & 4 (No.10) | — | |
| W24 | OEM-A-11 | M190-A-3 | 0.5 | no route | Injectors 2 & 6 (No.20) | — | |
| W25 | OEM-A-25 | M190-B-U | 0.5 | no route | Injectors 3 & 5 (No.30) | — | |
| W26 | OEM-B-11 | M190-C-42 | 0.5 | no route | Throttle position sensor (VTA) | — | |
| W27 | OEM-B-4 | M190-C-37 | 0.5 | no route | Coolant temp (THW) | — | |
| W28 | OEM-B-2 | M190-C-18 | 0.5 | no route | Karman-vortex AFM signal (KS) | — | |
| W29 | OEM-B-6 | M190-A-7 | 0.5 | no route | Primary O2 sensor (OX1) | — | |
| W30 | OEM-B-3 | M190-C-39 | 0.5 | no route | Intake air temp (THA) | — | |
| W31 | OEM-D-9 | M190-C-32 | 0.5 | no route | Vehicle speed sensor (SPD) | — |
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 (1)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NO_FUEL_PUMP | fuel pump | This engine harness has no fuel-pump control path: no fuel-pump relay output is wired to the new ECU. If the stock car switches the pump outside the ECU (an airflow-meter contact or a separate module), the standalone must drive the pump relay itself — see the install notes for this car. |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for Toyota 7M-GTE not found in the ECU's docs (no named 7M sync mode) - Main power feed not sourced — M190's relay-fed power input is drawn through the main relay, but the feed's fuse rating is not in the library yet Auto-mapped by auto_map() from the library pin data on 2026-10-20. Review every wire against both manuals before building. Open items: - Main-relay feed: no switched power (ecu_main_power / switched_feed) on the stock ECU - Fuel-pump control: MoTeC M190 needs to drive the fuel pump, but the stock ECU has no fuel-pump output (an airflow-meter contact or a separate module runs it) and the ECU has no fuel-pump output pin to wire — add a fuel-pump relay on a spare low-side output, see the install notes for this car.
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Emtron SL4/SL6/SL8 pinout pages | https://docs.emtronaustralia.com.au/engine-management/wiring/index.html | archive | 2026-10-05 | e52b3da9996a |
| 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 |
| 4 | vendor_doc | Toyota 7M-GTE EFI manual — "Terminals of ECU" (complete terminal list, no pin numbers) | http://shoarmateam.nl/upload/Toyota-Other/Cressida/MX83/efi%20system%20+%20WIRING/toyota-7m-manual-efi-fi%5b1%5d.pdf | — | — | — |
| 3 | forum | rusEFI Mazda Miata 2002 engine wiring | https://github.com/rusefi/rusefi/wiki/Mazda-Miata-2002 | archive | 2026-10-05 | cc3cae670408 |
| 2 | forum | AllPinouts: 1989–1992 Toyota Supra ECU | https://allpinouts.org/pinouts/connectors/car/1989-1992-toyota-supra-ecu/ | — | — | — |