Mazda RX-7 FC 1986-92 (13B-T Turbo II) → MaxxECU MaxxECU GEN2 TRACK (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — MaxxECU — MaxxECU GEN2 TRACK
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 | 49 wires · 9 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 | MAXXECUGEN2T-MX1-25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MAXXECUGEN2T-MX2-25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-2-R | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-3-G | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | MAXXECUGEN2T-MX1-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MAXXECUGEN2T-MX2-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | MAXXECUGEN2T-MX3-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-1-P | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-1-Q | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | MAXXECUGEN2T-MX1-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-2-A | MAXXECUGEN2T-MX1-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-1-T | MAXXECUGEN2T-MX1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-1-N | MAXXECUGEN2T-MX1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-1-R | MAXXECUGEN2T-MX2-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-1-U | MAXXECUGEN2T-MX1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-1-V | MAXXECUGEN2T-MX1-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-1-X | MAXXECUGEN2T-MX1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-3-E | MAXXECUGEN2T-MX1-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-3-H | MAXXECUGEN2T-MX1-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-3-C | MAXXECUGEN2T-MX1-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-F | MAXXECUGEN2T-MX1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-F | MAXXECUGEN2T-MX1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-D | MAXXECUGEN2T-MX1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-1-C | MAXXECUGEN2T-MX1-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-1-S | MAXXECUGEN2T-MX1-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-K | MAXXECUGEN2T-MX1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-M | MAXXECUGEN2T-MX2-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-N | MAXXECUGEN2T-MX2-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-O | MAXXECUGEN2T-MX2-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-P | MAXXECUGEN2T-MX3-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-Q | MAXXECUGEN2T-MX3-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-2-E | MAXXECUGEN2T-MX1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-2-B | MAXXECUGEN2T-MX1-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-2-G | MAXXECUGEN2T-MX1-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-D | MAXXECUGEN2T-MX1-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-I | MAXXECUGEN2T-MX1-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-J | MAXXECUGEN2T-MX2-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-L | MAXXECUGEN2T-MX2-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-F | MAXXECUGEN2T-MX2-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-2-H | MAXXECUGEN2T-MX2-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-1-O | MAXXECUGEN2T-MX1-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-1-E | MAXXECUGEN2T-MX1-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-1-G | MAXXECUGEN2T-MX3-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-1-H | MAXXECUGEN2T-MX3-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-1-L | MAXXECUGEN2T-MX2-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-3-B | MAXXECUGEN2T-MX2-15 | 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 | MAXXECUGEN2T-MX1-12 | MAXXECUGEN2T-MX1-9 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | MAXXECUGEN2T-MX1-12 | MAXXECUGEN2T-MX1-25 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 3 | MAXXECUGEN2T-MX1-14 | MAXXECUGEN2T-MX1-12 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | MAXXECUGEN2T-MX1-14 | MAXXECUGEN2T-MX1-25 | open (OL) | sensor ground must not touch +12 V supply | |
| 5 | MAXXECUGEN2T-MX1-9 | MAXXECUGEN2T-MX1-25 | open (OL) | power ground must not touch +12 V supply |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MAXXECUGEN2T-MX1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition 1 | — | W18 | — | 0.5 | OEM-1-U | — | — | — |
| 10 | Digital/VR 1 SIGNAL + | — | W15 | — | 0.5 | OEM-1-T | — | — | — |
| 11 | Digital/VR 1 SIGNAL - | — | — | — | — | — | — | — | — |
| 12 | Digital/VR 1 POWER SUPPLY | — | W14 | — | 0.5 | OEM-2-A | — | — | — |
| 13 | Digital/VR 1 SHIELD | — | — | — | — | — | — | — | — |
| 14 | SENSOR GND | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | CAN L | — | — | — | — | — | — | — | — |
| 16 | CAN H | — | — | — | — | — | — | — | — |
| 17 | GP out 5 (GND) | — | W29 | — | 0.5 | OEM-2-K | — | — | — |
| 18 | Digital/VR 2 SIGNAL + | — | W16 | — | 0.5 | OEM-1-N | — | — | — |
| 19 | Digital/VR 2 SIGNAL - | — | — | — | — | — | — | — | — |
| 2 | Ignition 2 | — | W19 | — | 0.5 | OEM-1-V | — | — | — |
| 20 | Digital/VR 2 POWER SUPPLY | — | — | — | — | — | — | — | — |
| 21 | Digital/VR 2 SHIELD | — | — | — | — | — | — | — | — |
| 22 | 5V power supply | — | — | — | — | — | — | — | — |
| 23 | Digital/VR 3 SIGNAL + | — | W44 | — | 0.5 | OEM-1-O | — | — | — |
| 24 | Digital/VR 4 SIGNAL + | — | W45 | — | 0.5 | OEM-1-E | — | — | — |
| 25 | 12V supply 1 | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | AIN 1 | — | W35 | — | 0.5 | OEM-2-E | — | — | — |
| 27 | AIN 2 | — | W36 | — | 0.5 | OEM-2-B | — | — | — |
| 28 | AIN 3 | — | W37 | — | 0.5 | OEM-2-G | — | — | — |
| 29 | AIN 4 | — | W38 | — | 0.5 | OEM-2-D | — | — | — |
| 3 | Ignition 3 | — | W20 | — | 0.5 | OEM-1-X | — | — | — |
| 30 | AIN 5 | — | W39 | — | 0.5 | OEM-2-I | — | — | — |
| 31 | INJECTOR 1 | — | W21 | — | 0.5 | OEM-3-E | — | — | — |
| 32 | INJECTOR 2 | — | W22 | — | 0.5 | OEM-3-H | — | — | — |
| 33 | INJECTOR 3 | — | W23 | — | 0.5 | OEM-3-C | — | — | — |
| 34 | INJECTOR 4 | — | W24 | — | 0.5 | OEM-3-F | — | — | — |
| 4 | Ignition 4 | — | — | — | — | — | — | — | — |
| 5 | GP out 1 (GND) | — | W25 | — | 0.5 | OEM-1-F | — | — | — |
| 6 | GP out 2 (GND) | — | W26 | — | 0.5 | OEM-3-D | — | — | — |
| 7 | GP out 3 (GND) | — | W27 | — | 0.5 | OEM-1-C | — | — | — |
| 8 | GP out 4 (GND) | — | W28 | — | 0.5 | OEM-1-S | — | — | — |
| 9 | Engine gnd | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
MAXXECUGEN2T-MX2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition 5 | — | — | — | — | — | — | — | — |
| 10 | WBO2 Sensor 1 VS | — | — | — | — | — | — | — | — |
| 11 | WBO2 Sensor 1 COM/VREF | — | — | — | — | — | — | — | — |
| 12 | GP OUT 7 / WBO2 Sensor 1 H- | — | — | — | — | — | — | — | — |
| 13 | AIN 9 | — | W43 | — | 0.5 | OEM-2-H | — | — | — |
| 14 | AIN 10 | — | W48 | — | 0.5 | OEM-1-L | — | — | — |
| 15 | AIN 11 | — | W49 | — | 0.5 | OEM-3-B | — | — | — |
| 16 | AIN 12 | — | — | — | — | — | — | — | — |
| 17 | AIN 13 | — | — | — | — | — | — | — | — |
| 18 | WBO2 sensor 1 RCAL | — | — | — | — | — | — | — | — |
| 19 | WBO2 sensor 1 IP | — | — | — | — | — | — | — | — |
| 2 | Ignition 6 | — | — | — | — | — | — | — | — |
| 20 | 12V WBO2 sensor 1 H+ | — | — | — | — | — | — | — | — |
| 21 | WBO2 sensor 1 SHIELD | — | — | — | — | — | — | — | — |
| 22 | AIN 14 | — | — | — | — | — | — | — | — |
| 23 | AIN 15 | — | — | — | — | — | — | — | — |
| 24 | 12V supply 3 | — | — | — | — | — | — | — | — |
| 25 | 12V supply 2 | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | KNOCK1 SHIELD | — | — | — | — | — | — | — | — |
| 27 | KNOCK 1- | — | — | — | — | — | — | — | — |
| 28 | KNOCK 1+ | — | W17 | — | 0.5 | OEM-1-R | — | — | — |
| 29 | KNOCK 2 SHIELD | — | — | — | — | — | — | — | — |
| 3 | GP out 6 (GND) | — | W30 | — | 0.5 | OEM-2-M | — | — | — |
| 30 | KNOCK 2- | — | — | — | — | — | — | — | — |
| 31 | KNOCK 2+ | — | — | — | — | — | — | — | — |
| 32 | AIN 16 | — | — | — | — | — | — | — | — |
| 33 | INJECTOR 5 | — | W31 | — | 0.5 | OEM-2-N | — | — | — |
| 34 | INJECTOR 6 | — | W32 | — | 0.5 | OEM-2-O | — | — | — |
| 4 | AIN 6 | — | W40 | — | 0.5 | OEM-2-J | — | — | — |
| 5 | AIN 7 | — | W41 | — | 0.5 | OEM-2-L | — | — | — |
| 6 | AIN 8 | — | W42 | — | 0.5 | OEM-2-F | — | — | — |
| 7 | GP out 13 (H-BRIDGE 1) | — | — | — | — | — | — | — | — |
| 8 | GP out 14 (H-BRIDGE 1) | — | — | — | — | — | — | — | — |
| 9 | Engine gnd | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
MAXXECUGEN2T-MX3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | GP out 15 (H-BRIDGE 2) | — | — | — | — | — | — | — | — |
| 10 | WBO2 sensor 2 VS | — | — | — | — | — | — | — | — |
| 11 | WBO2 sensor 2 COM/VREF | — | — | — | — | — | — | — | — |
| 12 | GP Out 8 (GND) / WBO2 Sensor 2 H- | — | — | — | — | — | — | — | — |
| 14 | GP OUT 9 (12V) | — | — | — | — | — | — | — | — |
| 15 | GP OUT 10 (12V) | — | — | — | — | — | — | — | — |
| 16 | GP OUT 11 (12V) | — | — | — | — | — | — | — | — |
| 17 | GP OUT 12 (12V) | — | — | — | — | — | — | — | — |
| 18 | WBO2 sensor 2 RCAL | — | — | — | — | — | — | — | — |
| 19 | WBO2 sensor 2 IP | — | — | — | — | — | — | — | — |
| 2 | GP out 16 (H-BRIDGE 2) | — | — | — | — | — | — | — | — |
| 20 | 12V WBO2 sensor 2 (H+) | — | — | — | — | — | — | — | — |
| 21 | Digital/VR 5 SIGNAL + | — | W46 | — | 0.5 | OEM-1-G | — | — | — |
| 22 | Digital/VR 5 SIGNAL - | — | — | — | — | — | — | — | — |
| 23 | Digital/VR 5 SHIELD | — | — | — | — | — | — | — | — |
| 24 | CAN 2 L | — | — | — | — | — | — | — | — |
| 25 | CAN 2 H | — | — | — | — | — | — | — | — |
| 26 | Digital/VR 6 SIGNAL + | — | W47 | — | 0.5 | OEM-1-H | — | — | — |
| 27 | Digital/VR 6 SIGNAL - | — | — | — | — | — | — | — | — |
| 28 | Digital/VR 6 SHIELD | — | — | — | — | — | — | — | — |
| 29 | INJECTOR 7 | — | W33 | — | 0.5 | OEM-2-P | — | — | — |
| 3 | Ignition 7 | — | — | — | — | — | — | — | — |
| 30 | INJECTOR 8 | — | W34 | — | 0.5 | OEM-2-Q | — | — | — |
| 4 | Ignition 8 | — | — | — | — | — | — | — | — |
| 9 | Engine gnd | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W27 | — | 0.5 | MAXXECUGEN2T-MX1-7 | — | — | — |
| E | A/C request | — | W45 | — | 0.5 | MAXXECUGEN2T-MX1-24 | — | — | — |
| F | A/C clutch relay | — | W25 | — | 0.5 | MAXXECUGEN2T-MX1-5 | — | — | — |
| G | Neutral switch | — | W46 | — | 0.5 | MAXXECUGEN2T-MX3-21 | — | — | — |
| H | Water temperature switch | — | W47 | — | 0.5 | MAXXECUGEN2T-MX3-26 | — | — | — |
| L | Clutch switch | — | W48 | — | 0.5 | MAXXECUGEN2T-MX2-14 | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W16 | — | 0.5 | MAXXECUGEN2T-MX1-18 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W44 | — | 0.5 | MAXXECUGEN2T-MX1-23 | — | — | — |
| P | CAS ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | W17 | — | 0.5 | MAXXECUGEN2T-MX2-28 | — | — | — |
| S | Port air valve | — | W28 | — | 0.5 | MAXXECUGEN2T-MX1-8 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W15 | — | 0.5 | MAXXECUGEN2T-MX1-10 | — | — | — |
| U | Ignition select (trailing rotor) | — | W18 | — | 0.5 | MAXXECUGEN2T-MX1-1 | — | — | — |
| V | Ignition leading | — | W19 | — | 0.5 | MAXXECUGEN2T-MX1-2 | — | — | — |
| X | Ignition trailing | — | W20 | — | 0.5 | MAXXECUGEN2T-MX1-3 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W14 | — | 0.5 | MAXXECUGEN2T-MX1-12 | — | — | — |
| B | MAP (pressure) signal | — | W36 | — | 0.5 | MAXXECUGEN2T-MX1-27 | — | — | — |
| C | Sensor ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | W38 | — | 0.5 | MAXXECUGEN2T-MX1-29 | — | — | — |
| E | Airflow signal (AFM) | — | W35 | — | 0.5 | MAXXECUGEN2T-MX1-26 | — | — | — |
| F | Variable resistor (tuning) | — | W42 | — | 0.5 | MAXXECUGEN2T-MX2-6 | — | — | — |
| G | Throttle position (TPS) | — | W37 | — | 0.5 | MAXXECUGEN2T-MX1-28 | — | — | — |
| H | Atmospheric pressure (ATP) | — | W43 | — | 0.5 | MAXXECUGEN2T-MX2-13 | — | — | — |
| I | Coolant temperature (ECT) | — | W39 | — | 0.5 | MAXXECUGEN2T-MX1-30 | — | — | — |
| J | Inlet air temperature (IAT) | — | W40 | — | 0.5 | MAXXECUGEN2T-MX2-4 | — | — | — |
| K | Turbo control valve (boost) | — | W29 | — | 0.5 | MAXXECUGEN2T-MX1-17 | — | — | — |
| L | Manifold air temperature (MAT) | — | W41 | — | 0.5 | MAXXECUGEN2T-MX2-5 | — | — | — |
| M | Pressure regulator control valve | — | W30 | — | 0.5 | MAXXECUGEN2T-MX2-3 | — | — | — |
| N | EGR valve | — | W31 | — | 0.5 | MAXXECUGEN2T-MX2-33 | — | — | — |
| O | Switching valve | — | W32 | — | 0.5 | MAXXECUGEN2T-MX2-34 | — | — | — |
| P | Relief valve | — | W33 | — | 0.5 | MAXXECUGEN2T-MX3-29 | — | — | — |
| Q | Idle control (BAC) | — | W34 | — | 0.5 | MAXXECUGEN2T-MX3-30 | — | — | — |
| R | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Starter input | — | W49 | — | 0.5 | MAXXECUGEN2T-MX2-15 | — | — | — |
| C | Primary injector 2 | — | W23 | — | 0.5 | MAXXECUGEN2T-MX1-33 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W26 | — | 0.5 | MAXXECUGEN2T-MX1-6 | — | — | — |
| E | Primary injector 1 | — | W21 | — | 0.5 | MAXXECUGEN2T-MX1-31 | — | — | — |
| F | Secondary injector 2 | — | W24 | — | 0.5 | MAXXECUGEN2T-MX1-34 | — | — | — |
| G | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W22 | — | 0.5 | MAXXECUGEN2T-MX1-32 | — | — | — |
| I | Ignition power (+12V via main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| J | Battery constant (+12V) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-1-P | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-1-Q | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W13 | — | 0.5 | MAXXECUGEN2T-MX1-14 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MAXXECUGEN2T-MX1-25 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | MAXXECUGEN2T-MX2-25 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-2-R | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-3-G | — | — | — |
| 1 | — | — | W7 | — | 0.85 | MAXXECUGEN2T-MX1-9 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | MAXXECUGEN2T-MX2-9 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | MAXXECUGEN2T-MX3-9 | — | — | — |
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 | MAXXECUGEN2T-MX1-7 | GP out 3 (GND) | low_side_out | single_source | |
| OEM-1-E | A/C request | digital_in | MAXXECUGEN2T-MX1-24 | Digital/VR 4 SIGNAL + | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | MAXXECUGEN2T-MX1-5 | GP out 1 (GND) | low_side_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | MAXXECUGEN2T-MX3-21 | Digital/VR 5 SIGNAL + | digital_in | corroborated | |
| OEM-1-H | Water temperature switch | digital_in | MAXXECUGEN2T-MX3-26 | Digital/VR 6 SIGNAL + | digital_in | corroborated | |
| OEM-1-L | Clutch switch | digital_in | MAXXECUGEN2T-MX2-14 | AIN 10 | analog_in | single_source | |
| OEM-1-M | Ignition feedback (tacho) | tacho_out | — | — | — | single_source | |
| OEM-1-N | CAS 2-tooth (G, cam) | trigger_in | MAXXECUGEN2T-MX1-18 | Digital/VR 2 SIGNAL + | trigger_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | MAXXECUGEN2T-MX1-23 | Digital/VR 3 SIGNAL + | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | MAXXECUGEN2T-MX1-14 | SENSOR GND | sensor_ground | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | MAXXECUGEN2T-MX1-14 | SENSOR GND | sensor_ground | corroborated | |
| OEM-1-R | Knock input | knock_in | MAXXECUGEN2T-MX2-28 | KNOCK 1+ | knock_in | corroborated | |
| OEM-1-S | Port air valve | low_side_out | MAXXECUGEN2T-MX1-8 | GP out 4 (GND) | low_side_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | MAXXECUGEN2T-MX1-10 | Digital/VR 1 SIGNAL + | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | MAXXECUGEN2T-MX1-1 | Ignition 1 | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | MAXXECUGEN2T-MX1-2 | Ignition 2 | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | MAXXECUGEN2T-MX1-3 | Ignition 3 | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | MAXXECUGEN2T-MX1-12 | Digital/VR 1 POWER SUPPLY | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | MAXXECUGEN2T-MX1-27 | AIN 2 | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | MAXXECUGEN2T-MX1-14 | SENSOR GND | sensor_ground | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | MAXXECUGEN2T-MX1-29 | AIN 4 | analog_in | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | MAXXECUGEN2T-MX1-26 | AIN 1 | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | MAXXECUGEN2T-MX2-6 | AIN 8 | analog_in | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | MAXXECUGEN2T-MX1-28 | AIN 3 | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | MAXXECUGEN2T-MX2-13 | AIN 9 | analog_in | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | MAXXECUGEN2T-MX1-30 | AIN 5 | analog_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | MAXXECUGEN2T-MX2-4 | AIN 6 | analog_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | MAXXECUGEN2T-MX1-17 | GP out 5 (GND) | low_side_out | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | MAXXECUGEN2T-MX2-5 | AIN 7 | analog_in | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | MAXXECUGEN2T-MX2-3 | GP out 6 (GND) | low_side_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | MAXXECUGEN2T-MX2-33 | INJECTOR 5 | injector_out | single_source | |
| OEM-2-O | Switching valve | low_side_out | MAXXECUGEN2T-MX2-34 | INJECTOR 6 | injector_out | single_source | |
| OEM-2-P | Relief valve | low_side_out | MAXXECUGEN2T-MX3-29 | INJECTOR 7 | injector_out | single_source | |
| OEM-2-Q | Idle control (BAC) | low_side_out | MAXXECUGEN2T-MX3-30 | INJECTOR 8 | injector_out | single_source | |
| OEM-2-R | Power ground | ground | MAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9 | Engine gnd + Engine gnd + Engine gnd | ground | single_source | |
| OEM-3-A | Power ground | ground | MAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9 | Engine gnd + Engine gnd + Engine gnd | ground | single_source | |
| OEM-3-B | Starter input | digital_in | MAXXECUGEN2T-MX2-15 | AIN 11 | analog_in | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | MAXXECUGEN2T-MX1-33 | INJECTOR 3 | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | MAXXECUGEN2T-MX1-6 | GP out 2 (GND) | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | MAXXECUGEN2T-MX1-31 | INJECTOR 1 | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | MAXXECUGEN2T-MX1-34 | INJECTOR 4 | injector_out | single_source | |
| OEM-3-G | Power ground | ground | MAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9 | Engine gnd + Engine gnd + Engine gnd | ground | single_source | |
| OEM-3-H | Secondary injector 1 | injector_out | MAXXECUGEN2T-MX1-32 | INJECTOR 2 | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | MAXXECUGEN2T-MX1-25 + MAXXECUGEN2T-MX2-25 | 12V supply 1 + 12V supply 2 | power_in | single_source | |
| OEM-3-J | Battery constant (+12V) | 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 | MAXXECUGEN2T-MX1-25 | 0.85 | no route | 12V supply 1 | — | |
| W3 | SP-14V-1 | MAXXECUGEN2T-MX2-25 | 0.85 | no route | 12V supply 2 | — | |
| W4 | OEM-2-R | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-3-G | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | SP-GND-1 | MAXXECUGEN2T-MX1-9 | 0.85 | no route | Engine gnd | — | |
| W8 | SP-GND-1 | MAXXECUGEN2T-MX2-9 | 0.85 | no route | Engine gnd | — | |
| W9 | SP-GND-1 | MAXXECUGEN2T-MX3-9 | 0.85 | no route | Engine gnd | — | |
| W10 | OEM-1-P | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W11 | OEM-1-Q | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W12 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W13 | SP-0V-1 | MAXXECUGEN2T-MX1-14 | 0.5 | no route | SENSOR GND | — | |
| W14 | OEM-2-A | MAXXECUGEN2T-MX1-12 | 0.5 | no route | 5V sensor supply | — | |
| W15 | OEM-1-T | MAXXECUGEN2T-MX1-10 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W16 | OEM-1-N | MAXXECUGEN2T-MX1-18 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W17 | OEM-1-R | MAXXECUGEN2T-MX2-28 | 0.5 | no route | Knock input | — | |
| W18 | OEM-1-U | MAXXECUGEN2T-MX1-1 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W19 | OEM-1-V | MAXXECUGEN2T-MX1-2 | 0.5 | no route | Ignition leading | — | |
| W20 | OEM-1-X | MAXXECUGEN2T-MX1-3 | 0.5 | no route | Ignition trailing | — | |
| W21 | OEM-3-E | MAXXECUGEN2T-MX1-31 | 0.5 | no route | Primary injector 1 | — | |
| W22 | OEM-3-H | MAXXECUGEN2T-MX1-32 | 0.5 | no route | Secondary injector 1 | — | |
| W23 | OEM-3-C | MAXXECUGEN2T-MX1-33 | 0.5 | no route | Primary injector 2 | — | |
| W24 | OEM-3-F | MAXXECUGEN2T-MX1-34 | 0.5 | no route | Secondary injector 2 | — | |
| W25 | OEM-1-F | MAXXECUGEN2T-MX1-5 | 0.5 | no route | A/C clutch relay | — | |
| W26 | OEM-3-D | MAXXECUGEN2T-MX1-6 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W27 | OEM-1-C | MAXXECUGEN2T-MX1-7 | 0.5 | no route | Air bypass solenoid | — | |
| W28 | OEM-1-S | MAXXECUGEN2T-MX1-8 | 0.5 | no route | Port air valve | — | |
| W29 | OEM-2-K | MAXXECUGEN2T-MX1-17 | 0.5 | no route | Turbo control valve (boost) | — | |
| W30 | OEM-2-M | MAXXECUGEN2T-MX2-3 | 0.5 | no route | Pressure regulator control valve | — | |
| W31 | OEM-2-N | MAXXECUGEN2T-MX2-33 | 0.5 | no route | EGR valve | — | |
| W32 | OEM-2-O | MAXXECUGEN2T-MX2-34 | 0.5 | no route | Switching valve | — | |
| W33 | OEM-2-P | MAXXECUGEN2T-MX3-29 | 0.5 | no route | Relief valve | — | |
| W34 | OEM-2-Q | MAXXECUGEN2T-MX3-30 | 0.5 | no route | Idle control (BAC) | — | |
| W35 | OEM-2-E | MAXXECUGEN2T-MX1-26 | 0.5 | no route | Airflow signal (AFM) | — | |
| W36 | OEM-2-B | MAXXECUGEN2T-MX1-27 | 0.5 | no route | MAP (pressure) signal | — | |
| W37 | OEM-2-G | MAXXECUGEN2T-MX1-28 | 0.5 | no route | Throttle position (TPS) | — | |
| W38 | OEM-2-D | MAXXECUGEN2T-MX1-29 | 0.5 | no route | O2 sensor signal | — | |
| W39 | OEM-2-I | MAXXECUGEN2T-MX1-30 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W40 | OEM-2-J | MAXXECUGEN2T-MX2-4 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W41 | OEM-2-L | MAXXECUGEN2T-MX2-5 | 0.5 | no route | Manifold air temperature (MAT) | — | |
| W42 | OEM-2-F | MAXXECUGEN2T-MX2-6 | 0.5 | no route | Variable resistor (tuning) | — | |
| W43 | OEM-2-H | MAXXECUGEN2T-MX2-13 | 0.5 | no route | Atmospheric pressure (ATP) | — | |
| W44 | OEM-1-O | MAXXECUGEN2T-MX1-23 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W45 | OEM-1-E | MAXXECUGEN2T-MX1-24 | 0.5 | no route | A/C request | — | |
| W46 | OEM-1-G | MAXXECUGEN2T-MX3-21 | 0.5 | no route | Neutral switch | — | |
| W47 | OEM-1-H | MAXXECUGEN2T-MX3-26 | 0.5 | no route | Water temperature switch | — | |
| W48 | OEM-1-L | MAXXECUGEN2T-MX2-14 | 0.5 | no route | Clutch switch | — | |
| W49 | OEM-3-B | MAXXECUGEN2T-MX2-15 | 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 (10)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-1-L ↔ MAXXECUGEN2T-MX2-14 | OEM-1-L "Clutch switch" [digital_in] is wired to MAXXECUGEN2T-MX2-14 "AIN 10" [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-3-B ↔ MAXXECUGEN2T-MX2-15 | OEM-3-B "Starter input" [digital_in] is wired to MAXXECUGEN2T-MX2-15 "AIN 11" [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-I ↔ MAXXECUGEN2T-MX1-30 | OEM-2-I "Coolant temperature (ECT)" [temp_in] is wired to MAXXECUGEN2T-MX1-30 "AIN 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-J ↔ MAXXECUGEN2T-MX2-4 | OEM-2-J "Inlet air temperature (IAT)" [temp_in] is wired to MAXXECUGEN2T-MX2-4 "AIN 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-L ↔ MAXXECUGEN2T-MX2-5 | OEM-2-L "Manifold air temperature (MAT)" [temp_in] is wired to MAXXECUGEN2T-MX2-5 "AIN 7" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-N ↔ MAXXECUGEN2T-MX2-33 | OEM-2-N "EGR valve" [low_side_out] is wired to MAXXECUGEN2T-MX2-33 "INJECTOR 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-O ↔ MAXXECUGEN2T-MX2-34 | OEM-2-O "Switching valve" [low_side_out] is wired to MAXXECUGEN2T-MX2-34 "INJECTOR 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-P ↔ MAXXECUGEN2T-MX3-29 | OEM-2-P "Relief valve" [low_side_out] is wired to MAXXECUGEN2T-MX3-29 "INJECTOR 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-Q ↔ MAXXECUGEN2T-MX3-30 | OEM-2-Q "Idle control (BAC)" [low_side_out] is wired to MAXXECUGEN2T-MX3-30 "INJECTOR 8" [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 (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-3-J | 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-3 J: Battery constant (+12V): MaxxECU MaxxECU GEN2 TRACK has no battery-constant input; not needed - OEM-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on MaxxECU MaxxECU GEN2 TRACK - MAXXECUGEN2T-MX2 24: 12V supply 3: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
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 | MaxxECU GEN2 pinout (RACE MX1–MX4 / TRACK MX1–MX3) | http://www.maxxecu.com/webhelp/wirings-maxxecu_gen2_pinout.html | archive | 2026-10-05 | f689b8b6b08f |
| 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/ | — | — | — |