MX-5 Miata NA8 1996-97 (BP-ZE, 1.8, OBD-II) → MaxxECU MaxxECU PRO REV10+ (auto)
MX-5 Miata NA8 1996-97 (BP-ZE, 1.8, OBD-II) — MaxxECU — MaxxECU PRO
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
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 | 1: read the Findings page before cutting any wire |
| Size of the job | 55 wires · 10 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-4-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | MAXXECUPRO-C1-M4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MAXXECUPRO-C3-M4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-4-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-4-C | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-4-D | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-4-K | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MAXXECUPRO-C1-L4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | MAXXECUPRO-C2-H1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | MAXXECUPRO-C2-H2 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | MAXXECUPRO-C2-H3 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | MAXXECUPRO-C3-L4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-3-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-4-H | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | MAXXECUPRO-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | MAXXECUPRO-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | MAXXECUPRO-C3-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | MAXXECUPRO-C3-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-I | MAXXECUPRO-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-4-E | MAXXECUPRO-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-4-G | MAXXECUPRO-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-4-N | MAXXECUPRO-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-4-R | MAXXECUPRO-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-4-U | MAXXECUPRO-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-4-V | MAXXECUPRO-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-4-W | MAXXECUPRO-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-4-X | MAXXECUPRO-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-3-B | MAXXECUPRO-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-3-F | MAXXECUPRO-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-3-G | MAXXECUPRO-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-1-A | MAXXECUPRO-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-B | MAXXECUPRO-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-G | MAXXECUPRO-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-1-U | MAXXECUPRO-C1-E4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-3-M | MAXXECUPRO-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-1-E | MAXXECUPRO-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-4-J | MAXXECUPRO-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-4-O | MAXXECUPRO-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-4-P | MAXXECUPRO-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-4-Q | MAXXECUPRO-C4-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-4-T | MAXXECUPRO-C4-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-4-L | MAXXECUPRO-C4-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-3-H | MAXXECUPRO-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-3-N | MAXXECUPRO-C3-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-3-C | MAXXECUPRO-C3-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-3-D | MAXXECUPRO-C3-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-3-K | MAXXECUPRO-C1-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-3-J | MAXXECUPRO-C3-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-1-M | MAXXECUPRO-C1-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-1-C | MAXXECUPRO-C1-K4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-1-K | MAXXECUPRO-C3-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-1-L | MAXXECUPRO-C3-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-1-Q | MAXXECUPRO-C4-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-3-L | MAXXECUPRO-C4-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-3-P | MAXXECUPRO-C4-E1 | 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 | MAXXECUPRO-C1-G1 | MAXXECUPRO-C1-H1 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 2 | MAXXECUPRO-C1-G1 | MAXXECUPRO-C1-L4 | open (OL) | 5 V sensor reference must not touch power ground | |
| 3 | MAXXECUPRO-C1-G1 | MAXXECUPRO-C1-M4 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 4 | MAXXECUPRO-C1-H1 | MAXXECUPRO-C1-M4 | open (OL) | sensor ground must not touch +12 V supply | |
| 5 | MAXXECUPRO-C1-L4 | MAXXECUPRO-C1-M4 | 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
MAXXECUPRO-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | GPO 5 | — | W36 | — | 0.5 | OEM-1-E | — | — | — |
| A2 | IGN 1 | — | W22 | — | 0.5 | OEM-4-N | — | — | — |
| A3 | IGN 2 | — | W23 | — | 0.5 | OEM-4-R | — | — | — |
| A4 | GPO 8/TACHO | — | W39 | — | 0.5 | OEM-4-P | — | — | — |
| B1 | GPO 6 | — | W37 | — | 0.5 | OEM-4-J | — | — | — |
| B2 | IGN 3 | — | — | — | — | — | — | — | — |
| B3 | IGN 4 | — | — | — | — | — | — | — | — |
| B4 | GPO 1 | — | W31 | — | 0.5 | OEM-1-A | — | — | — |
| C1 | GPO 7 | — | W38 | — | 0.5 | OEM-4-O | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W32 | — | 0.5 | OEM-1-B | — | — | — |
| D1 | WBO2 Heater- | — | W35 | — | 0.5 | OEM-3-M | — | — | — |
| D2 | IGN 7 | — | — | — | — | — | — | — | — |
| D3 | IGN 8 | — | — | — | — | — | — | — | — |
| D4 | GPO 3 | — | W33 | — | 0.5 | OEM-1-G | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| E4 | GPO 4 | — | W34 | — | 0.5 | OEM-1-U | — | — | — |
| F1 | CLT | — | W30 | — | 0.5 | OEM-3-G | — | — | — |
| F2 | IAT | — | W47 | — | 0.5 | OEM-3-K | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W19 | — | 0.5 | OEM-3-I | — | — | — |
| G2 | TPS/AIN | — | W29 | — | 0.5 | OEM-3-F | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W20 | — | 0.5 | OEM-4-E | — | — | — |
| H4 | HOME | — | W21 | — | 0.5 | OEM-4-G | — | — | — |
| J1 | AIN 1 (temperature) | — | — | — | — | — | — | — | — |
| J2 | AIN 2 (temperature) | — | — | — | — | — | — | — | — |
| J3 | AIN 3 (0-5V) | — | W28 | — | 0.5 | OEM-3-B | — | — | — |
| J4 | AIN 4 (0-5V) | — | W43 | — | 0.5 | OEM-3-H | — | — | — |
| K1 | INJ 1 | — | W24 | — | 0.5 | OEM-4-U | — | — | — |
| K2 | INJ 2 | — | W25 | — | 0.5 | OEM-4-V | — | — | — |
| K3 | DIN/VR 1 | — | W49 | — | 0.5 | OEM-1-M | — | — | — |
| K4 | DIN/VR 2 | — | W50 | — | 0.5 | OEM-1-C | — | — | — |
| L1 | INJ 8 | — | — | — | — | — | — | — | — |
| L2 | INJ 7 | — | — | — | — | — | — | — | — |
| L3 | INJ 6 | — | — | — | — | — | — | — | — |
| L4 | Engine GND | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W26 | — | 0.5 | OEM-4-W | — | — | — |
| M2 | INJ 4 | — | W27 | — | 0.5 | OEM-4-X | — | — | — |
| M3 | INJ 5 | — | — | — | — | — | — | — | — |
| M4 | +12V ECU power supply | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
MAXXECUPRO-C2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | EGT 1+ | — | — | — | — | — | — | — | — |
| A2 | EGT 2+ | — | — | — | — | — | — | — | — |
| A3 | EGT 3+ | — | — | — | — | — | — | — | — |
| A4 | EGT 4+ | — | — | — | — | — | — | — | — |
| B1 | EGT 1- | — | — | — | — | — | — | — | — |
| B2 | EGT 2- | — | — | — | — | — | — | — | — |
| B3 | EGT 3- | — | — | — | — | — | — | — | — |
| B4 | EGT 4- | — | — | — | — | — | — | — | — |
| C1 | EGT 5+ | — | — | — | — | — | — | — | — |
| C2 | EGT 6+ | — | — | — | — | — | — | — | — |
| C3 | EGT 7+ | — | — | — | — | — | — | — | — |
| C4 | EGT 8+ | — | — | — | — | — | — | — | — |
| D1 | EGT 5- | — | — | — | — | — | — | — | — |
| D2 | EGT 6- | — | — | — | — | — | — | — | — |
| D3 | EGT 7- | — | — | — | — | — | — | — | — |
| D4 | EGT 8- | — | — | — | — | — | — | — | — |
| E1 | EGT 9+ | — | — | — | — | — | — | — | — |
| E2 | EGT 10+ | — | — | — | — | — | — | — | — |
| E3 | EGT 11+ | — | — | — | — | — | — | — | — |
| E4 | EGT 12+ | — | — | — | — | — | — | — | — |
| F1 | EGT 9- | — | — | — | — | — | — | — | — |
| F2 | EGT 10- | — | — | — | — | — | — | — | — |
| F3 | EGT 11- | — | — | — | — | — | — | — | — |
| F4 | EGT 12- | — | — | — | — | — | — | — | — |
| H1 | Engine ground 3 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| H2 | Engine ground 3 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| H3 | Engine ground 3 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
MAXXECUPRO-C3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | DIN/VR 4 | — | — | — | — | — | — | — | — |
| A2 | DIN/VR 5 | — | — | — | — | — | — | — | — |
| A3 | DIN 6 (SWITCH) | — | W51 | — | 0.5 | OEM-1-K | — | — | — |
| A4 | DIN 7 (SWITCH) | — | W52 | — | 0.5 | OEM-1-L | — | — | — |
| B1 | WBO2 2 RCAL | — | — | — | — | — | — | — | — |
| B2 | WBO2 2 IP | — | — | — | — | — | — | — | — |
| B3 | WBO2 2 VS | — | — | — | — | — | — | — | — |
| B4 | WBO2 2 COM | — | — | — | — | — | — | — | — |
| C1 | WBO2 2 Shield | — | — | — | — | — | — | — | — |
| C2 | +5V SENSOR SUPPLY 2 | — | — | — | — | — | — | — | — |
| C3 | ANALOG IN 5 (0-5V) | — | W44 | — | 0.5 | OEM-3-N | — | — | — |
| C4 | GPO 19 (12V) | — | — | — | — | — | — | — | — |
| D1 | ANALOG IN 6 (0-5V) | — | W45 | — | 0.5 | OEM-3-C | — | — | — |
| D2 | ANALOG IN 7 (0-5V) | — | W46 | — | 0.5 | OEM-3-D | — | — | — |
| D3 | ANALOG IN 8 (0-5V) | — | W48 | — | 0.5 | OEM-3-J | — | — | — |
| D4 | GPO 20 (12V) | — | — | — | — | — | — | — | — |
| E1 | GPO 10/WBO2 2 HTR | — | — | — | — | — | — | — | — |
| E2 | ANALOG IN 9 (0-5V) | — | — | — | — | — | — | — | — |
| E3 | ANALOG IN 10 (0-5V) | — | — | — | — | — | — | — | — |
| E4 | GPO 21 (12V) | — | — | — | — | — | — | — | — |
| F1 | INJECTOR OUT 15 | — | — | — | — | — | — | — | — |
| F2 | ANALOG IN 11 (0-5V) | — | — | — | — | — | — | — | — |
| F3 | ANALOG IN 12 (0-5V) | — | — | — | — | — | — | — | — |
| F4 | GPO 22 (12V) | — | — | — | — | — | — | — | — |
| G1 | INJECTOR OUT 14 | — | — | — | — | — | — | — | — |
| G2 | IGNITION OUT 11 | — | — | — | — | — | — | — | — |
| G3 | IGNITION OUT 9 | — | — | — | — | — | — | — | — |
| G4 | GPO 15 (12V) | — | — | — | — | — | — | — | — |
| H1 | INJECTOR OUT 13 | — | — | — | — | — | — | — | — |
| H2 | IGNITION OUT 12 | — | — | — | — | — | — | — | — |
| H3 | IGNITION OUT 10 | — | — | — | — | — | — | — | — |
| H4 | GPO 16 (12V) | — | — | — | — | — | — | — | — |
| J1 | INJECTOR OUT 16 | — | — | — | — | — | — | — | — |
| J2 | SENSOR GND | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| J3 | SENSOR GND | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| J4 | GPO 17 (12V) | — | — | — | — | — | — | — | — |
| K1 | INJECTOR OUT 10 | — | — | — | — | — | — | — | — |
| K2 | INJECTOR OUT 9 | — | — | — | — | — | — | — | — |
| K3 | KEY IN 12V | — | — | — | — | — | — | — | — |
| K4 | GPO 18 (12V) | — | — | — | — | — | — | — | — |
| L1 | INJECTOR OUT 11 | — | — | — | — | — | — | — | — |
| L2 | GPO 12/MOTOR 1 + | — | — | — | — | — | — | — | — |
| L3 | GPO 11/MOTOR 1 - | — | — | — | — | — | — | — | — |
| L4 | ENGINE GROUND 2 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJECTOR OUT 12 | — | — | — | — | — | — | — | — |
| M2 | GPO 13/MOTOR 2 + | — | — | — | — | — | — | — | — |
| M3 | GPO 14/MOTOR 2 - | — | — | — | — | — | — | — | — |
| M4 | 12V ECU 2 | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
MAXXECUPRO-C4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | CAN 2 H | — | — | — | — | — | — | — | — |
| A2 | CAN 2 L | — | — | — | — | — | — | — | — |
| A3 | 0-5V out 1 | — | — | — | — | — | — | — | — |
| A4 | 0-5V out 2 | — | — | — | — | — | — | — | — |
| B1 | AIN 18 (0-5V) | — | — | — | — | — | — | — | — |
| B2 | AIN 17 (0-5V) | — | — | — | — | — | — | — | — |
| B3 | AIN 16 (0-5V) | — | — | — | — | — | — | — | — |
| B4 | AIN 15 (0-5V) | — | — | — | — | — | — | — | — |
| C1 | AIN 14 (0-5V) | — | — | — | — | — | — | — | — |
| C2 | AIN 13 (0-5V) | — | — | — | — | — | — | — | — |
| C3 | AIN 19 (temp) | — | — | — | — | — | — | — | — |
| C4 | AIN 20 (temp) | — | — | — | — | — | — | — | — |
| D1 | AIN 21 (temp) | — | — | — | — | — | — | — | — |
| D2 | AIN 22 (temp) | — | — | — | — | — | — | — | — |
| D3 | DIN 8 (switch) | — | W53 | — | 0.5 | OEM-1-Q | — | — | — |
| D4 | DIN 9 (switch) | — | W54 | — | 0.5 | OEM-3-L | — | — | — |
| E1 | DIN 10 (switch) | — | W55 | — | 0.5 | OEM-3-P | — | — | — |
| E2 | DIN 11 (switch) | — | — | — | — | — | — | — | — |
| E3 | +5V sensor supply 3 | — | — | — | — | — | — | — | — |
| E4 | 5-10V sensor supply | — | — | — | — | — | — | — | — |
| F1 | GPO 23-30 flyback | — | — | — | — | — | — | — | — |
| F2 | Knock 1 | — | — | — | — | — | — | — | — |
| F3 | Knock 2 | — | — | — | — | — | — | — | — |
| F4 | Sensor GND3 / knock ground | — | — | — | — | — | — | — | — |
| G1 | GPO 23 | — | W40 | — | 0.5 | OEM-4-Q | — | — | — |
| G2 | GPO 24 | — | W41 | — | 0.5 | OEM-4-T | — | — | — |
| G3 | GPO 25 | — | W42 | — | 0.5 | OEM-4-L | — | — | — |
| G4 | GPO 26 | — | — | — | — | — | — | — | — |
| H1 | GPO 27 | — | — | — | — | — | — | — | — |
| H2 | GPO 28 | — | — | — | — | — | — | — | — |
| H3 | GPO 29 | — | — | — | — | — | — | — | — |
| H4 | GPO 30 | — | — | — | — | — | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Cooling fan relay (low-side) | — | W31 | — | 0.5 | MAXXECUPRO-C1-B4 | — | — | — |
| B | A/C condenser fan relay | — | W32 | — | 0.5 | MAXXECUPRO-C1-C4 | — | — | — |
| C | Starter input (12V while cranking) | — | W50 | — | 0.5 | MAXXECUPRO-C1-K4 | — | — | — |
| E | Check engine light (MIL) | — | W36 | — | 0.5 | MAXXECUPRO-C1-A1 | — | — | — |
| G | A/C clutch relay | — | W33 | — | 0.5 | MAXXECUPRO-C1-D4 | — | — | — |
| K | A/C pressure switch (A/C request) | — | W51 | — | 0.5 | MAXXECUPRO-C3-A3 | — | — | — |
| L | Clutch switch | — | W52 | — | 0.5 | MAXXECUPRO-C3-A4 | — | — | — |
| M | Vehicle speed sensor (VSS) | — | W49 | — | 0.5 | MAXXECUPRO-C1-K3 | — | — | — |
| Q | Brake switch | — | W53 | — | 0.5 | MAXXECUPRO-C4-D3 | — | — | — |
| U | Fuel pump relay (low-side) | — | W34 | — | 0.5 | MAXXECUPRO-C1-E4 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| B | MAF sensor input | — | W28 | — | 0.5 | MAXXECUPRO-C1-J3 | — | — | — |
| C | Front O2 sensor input | — | W45 | — | 0.5 | MAXXECUPRO-C3-D1 | — | — | — |
| D | Rear O2 sensor input | — | W46 | — | 0.5 | MAXXECUPRO-C3-D2 | — | — | — |
| F | Throttle position (TPS) | — | W29 | — | 0.5 | MAXXECUPRO-C1-G2 | — | — | — |
| G | Engine coolant temp (CLT) | — | W30 | — | 0.5 | MAXXECUPRO-C1-F1 | — | — | — |
| H | EGR boost sensor | — | W43 | — | 0.5 | MAXXECUPRO-C1-J4 | — | — | — |
| I | +5V sensor reference | — | W19 | — | 0.5 | MAXXECUPRO-C1-G1 | — | — | — |
| J | EGR valve position sensor | — | W48 | — | 0.5 | MAXXECUPRO-C3-D3 | — | — | — |
| K | Intake air temp (IAT) | — | W47 | — | 0.5 | MAXXECUPRO-C1-F2 | — | — | — |
| L | Idle switch (closed throttle) | — | W54 | — | 0.5 | MAXXECUPRO-C4-D4 | — | — | — |
| M | Front O2 heater control | — | W35 | — | 0.5 | MAXXECUPRO-C1-D1 | — | — | — |
| N | EGR boost sensor (2nd channel) | — | W44 | — | 0.5 | MAXXECUPRO-C3-C3 | — | — | — |
| O | Sensor ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Power steering pressure switch | — | W55 | — | 0.5 | MAXXECUPRO-C4-E1 | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Chassis ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | ECU power +12V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| C | Chassis ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| D | Chassis ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Crank position (CKP) sensor | — | W20 | — | 0.5 | MAXXECUPRO-C1-H3 | — | — | — |
| F | CAS SGT (cam trigger) | — | — | — | — | — | — | — | — |
| G | CAS SGC (cam sync) | — | W21 | — | 0.5 | MAXXECUPRO-C1-H4 | — | — | — |
| H | Crank pickup timing ground (CKP gnd) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| I | Permanent +12V (battery) | — | — | — | — | — | — | — | — |
| J | PRC solenoid (FPR control) | — | W37 | — | 0.5 | MAXXECUPRO-C1-B1 | — | — | — |
| K | Chassis ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| L | Tachometer output | — | W42 | — | 0.5 | MAXXECUPRO-C4-G3 | — | — | — |
| N | Ignition coil trigger (cyl 1&4) | — | W22 | — | 0.5 | MAXXECUPRO-C1-A2 | — | — | — |
| O | EGR vent solenoid | — | W38 | — | 0.5 | MAXXECUPRO-C1-C1 | — | — | — |
| P | EGR vacuum solenoid | — | W39 | — | 0.5 | MAXXECUPRO-C1-A4 | — | — | — |
| Q | Idle air control (IAC) valve | — | W40 | — | 0.5 | MAXXECUPRO-C4-G1 | — | — | — |
| R | Ignition coil trigger (cyl 2&3) | — | W23 | — | 0.5 | MAXXECUPRO-C1-A3 | — | — | — |
| T | EVAP purge solenoid | — | W41 | — | 0.5 | MAXXECUPRO-C4-G2 | — | — | — |
| U | Injector 1 (cyl 1) | — | W24 | — | 0.5 | MAXXECUPRO-C1-K1 | — | — | — |
| V | Injector 2 (cyl 2) | — | W25 | — | 0.5 | MAXXECUPRO-C1-K2 | — | — | — |
| W | Injector 3 (cyl 3) | — | W26 | — | 0.5 | MAXXECUPRO-C1-M1 | — | — | — |
| X | Injector 4 (cyl 4) | — | W27 | — | 0.5 | MAXXECUPRO-C1-M2 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | OEM-3-O | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-4-H | — | — | — |
| 1 | — | — | W15 | — | 0.5 | MAXXECUPRO-C1-H1 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | MAXXECUPRO-C1-H2 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | MAXXECUPRO-C3-J2 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | MAXXECUPRO-C3-J3 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-4-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MAXXECUPRO-C1-M4 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | MAXXECUPRO-C3-M4 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-4-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-4-C | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-4-D | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-4-K | — | — | — |
| 1 | — | — | W8 | — | 0.85 | MAXXECUPRO-C1-L4 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | MAXXECUPRO-C2-H1 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | MAXXECUPRO-C2-H2 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | MAXXECUPRO-C2-H3 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | MAXXECUPRO-C3-L4 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-A | Cooling fan relay (low-side) | low_side_out | MAXXECUPRO-C1-B4 | GPO 1 | low_side_out | corroborated | |
| OEM-1-B | A/C condenser fan relay | low_side_out | MAXXECUPRO-C1-C4 | GPO 2 | low_side_out | corroborated | |
| OEM-1-C | Starter input (12V while cranking) | digital_in | MAXXECUPRO-C1-K4 | DIN/VR 2 | digital_in | corroborated | |
| OEM-1-E | Check engine light (MIL) | low_side_out | MAXXECUPRO-C1-A1 | GPO 5 | low_side_out | corroborated | |
| OEM-1-G | A/C clutch relay | low_side_out | MAXXECUPRO-C1-D4 | GPO 3 | low_side_out | corroborated | |
| OEM-1-K | A/C pressure switch (A/C request) | digital_in | MAXXECUPRO-C3-A3 | DIN 6 (SWITCH) | digital_in | corroborated | |
| OEM-1-L | Clutch switch | digital_in | MAXXECUPRO-C3-A4 | DIN 7 (SWITCH) | digital_in | corroborated | |
| OEM-1-M | Vehicle speed sensor (VSS) | digital_in | MAXXECUPRO-C1-K3 | DIN/VR 1 | digital_in | corroborated | |
| OEM-1-Q | Brake switch | digital_in | MAXXECUPRO-C4-D3 | DIN 8 (switch) | digital_in | corroborated | |
| OEM-1-U | Fuel pump relay (low-side) | low_side_out | MAXXECUPRO-C1-E4 | GPO 4 | low_side_out | corroborated | |
| OEM-3-B | MAF sensor input | analog_in | MAXXECUPRO-C1-J3 | AIN 3 (0-5V) | analog_in | corroborated | |
| OEM-3-C | Front O2 sensor input | lambda_nb_in | MAXXECUPRO-C3-D1 | ANALOG IN 6 (0-5V) | analog_in | corroborated | |
| OEM-3-D | Rear O2 sensor input | lambda_nb_in | MAXXECUPRO-C3-D2 | ANALOG IN 7 (0-5V) | analog_in | corroborated | |
| OEM-3-F | Throttle position (TPS) | analog_in | MAXXECUPRO-C1-G2 | TPS/AIN | analog_in | corroborated | |
| OEM-3-G | Engine coolant temp (CLT) | temp_in | MAXXECUPRO-C1-F1 | CLT | temp_in | corroborated | |
| OEM-3-H | EGR boost sensor | analog_in | MAXXECUPRO-C1-J4 | AIN 4 (0-5V) | analog_in | corroborated | |
| OEM-3-I | +5V sensor reference | vref | MAXXECUPRO-C1-G1 | +5V sensor supply | vref | corroborated | |
| OEM-3-J | EGR valve position sensor | analog_in | MAXXECUPRO-C3-D3 | ANALOG IN 8 (0-5V) | analog_in | corroborated | |
| OEM-3-K | Intake air temp (IAT) | temp_in | MAXXECUPRO-C1-F2 | IAT | temp_in | corroborated | |
| OEM-3-L | Idle switch (closed throttle) | digital_in | MAXXECUPRO-C4-D4 | DIN 9 (switch) | digital_in | corroborated | |
| OEM-3-M | Front O2 heater control | low_side_out | MAXXECUPRO-C1-D1 | WBO2 Heater- | low_side_out | corroborated | |
| OEM-3-N | EGR boost sensor (2nd channel) | analog_in | MAXXECUPRO-C3-C3 | ANALOG IN 5 (0-5V) | analog_in | corroborated | |
| OEM-3-O | Sensor ground | sensor_ground | MAXXECUPRO-C1-H1 + MAXXECUPRO-C1-H2 + MAXXECUPRO-C3-J2 + MAXXECUPRO-C3-J3 | Sensor GND + Trigger GND + SENSOR GND + SENSOR GND | sensor_ground | corroborated | |
| OEM-3-P | Power steering pressure switch | digital_in | MAXXECUPRO-C4-E1 | DIN 10 (switch) | digital_in | corroborated | |
| OEM-4-A | Chassis ground | ground | MAXXECUPRO-C1-L4 + MAXXECUPRO-C2-H1 + MAXXECUPRO-C2-H2 + MAXXECUPRO-C2-H3 + MAXXECUPRO-C3-L4 | Engine GND + Engine ground 3 + Engine ground 3 + Engine ground 3 + ENGINE GROUND 2 | ground | corroborated | |
| OEM-4-B | ECU power +12V (main relay) | power_in | MAXXECUPRO-C1-M4 + MAXXECUPRO-C3-M4 | +12V ECU power supply + 12V ECU 2 | power_in | corroborated | |
| OEM-4-C | Chassis ground | ground | MAXXECUPRO-C1-L4 + MAXXECUPRO-C2-H1 + MAXXECUPRO-C2-H2 + MAXXECUPRO-C2-H3 + MAXXECUPRO-C3-L4 | Engine GND + Engine ground 3 + Engine ground 3 + Engine ground 3 + ENGINE GROUND 2 | ground | corroborated | |
| OEM-4-D | Chassis ground | ground | MAXXECUPRO-C1-L4 + MAXXECUPRO-C2-H1 + MAXXECUPRO-C2-H2 + MAXXECUPRO-C2-H3 + MAXXECUPRO-C3-L4 | Engine GND + Engine ground 3 + Engine ground 3 + Engine ground 3 + ENGINE GROUND 2 | ground | corroborated | |
| OEM-4-E | Crank position (CKP) sensor | trigger_in | MAXXECUPRO-C1-H3 | TRIGGER | trigger_in | corroborated | |
| OEM-4-F | CAS SGT (cam trigger) | trigger_in | — | — | — | corroborated | |
| OEM-4-G | CAS SGC (cam sync) | trigger_in | MAXXECUPRO-C1-H4 | HOME | trigger_in | corroborated | |
| OEM-4-H | Crank pickup timing ground (CKP gnd) | sensor_ground | MAXXECUPRO-C1-H1 + MAXXECUPRO-C1-H2 + MAXXECUPRO-C3-J2 + MAXXECUPRO-C3-J3 | Sensor GND + Trigger GND + SENSOR GND + SENSOR GND | sensor_ground | corroborated | |
| OEM-4-I | Permanent +12V (battery) | power_in | — | — | — | corroborated | |
| OEM-4-J | PRC solenoid (FPR control) | low_side_out | MAXXECUPRO-C1-B1 | GPO 6 | low_side_out | corroborated | |
| OEM-4-K | Chassis ground | ground | MAXXECUPRO-C1-L4 + MAXXECUPRO-C2-H1 + MAXXECUPRO-C2-H2 + MAXXECUPRO-C2-H3 + MAXXECUPRO-C3-L4 | Engine GND + Engine ground 3 + Engine ground 3 + Engine ground 3 + ENGINE GROUND 2 | ground | corroborated | |
| OEM-4-L | Tachometer output | tacho_out | MAXXECUPRO-C4-G3 | GPO 25 | low_side_out | corroborated | |
| OEM-4-N | Ignition coil trigger (cyl 1&4) | ignition_out | MAXXECUPRO-C1-A2 | IGN 1 | ignition_out | corroborated | |
| OEM-4-O | EGR vent solenoid | low_side_out | MAXXECUPRO-C1-C1 | GPO 7 | low_side_out | corroborated | |
| OEM-4-P | EGR vacuum solenoid | low_side_out | MAXXECUPRO-C1-A4 | GPO 8/TACHO | low_side_out | corroborated | |
| OEM-4-Q | Idle air control (IAC) valve | low_side_out | MAXXECUPRO-C4-G1 | GPO 23 | low_side_out | corroborated | |
| OEM-4-R | Ignition coil trigger (cyl 2&3) | ignition_out | MAXXECUPRO-C1-A3 | IGN 2 | ignition_out | corroborated | |
| OEM-4-T | EVAP purge solenoid | low_side_out | MAXXECUPRO-C4-G2 | GPO 24 | low_side_out | corroborated | |
| OEM-4-U | Injector 1 (cyl 1) | injector_out | MAXXECUPRO-C1-K1 | INJ 1 | injector_out | corroborated | |
| OEM-4-V | Injector 2 (cyl 2) | injector_out | MAXXECUPRO-C1-K2 | INJ 2 | injector_out | corroborated | |
| OEM-4-W | Injector 3 (cyl 3) | injector_out | MAXXECUPRO-C1-M1 | INJ 3 | injector_out | corroborated | |
| OEM-4-X | Injector 4 (cyl 4) | injector_out | MAXXECUPRO-C1-M2 | INJ 4 | injector_out | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-4-B | SP-14V-1 | 0.85 | no route | ECU power +12V (main relay) | — | |
| W2 | SP-14V-1 | MAXXECUPRO-C1-M4 | 0.85 | no route | +12V ECU power supply | — | |
| W3 | SP-14V-1 | MAXXECUPRO-C3-M4 | 0.85 | no route | 12V ECU 2 | — | |
| W4 | OEM-4-A | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W5 | OEM-4-C | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W6 | OEM-4-D | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W7 | OEM-4-K | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W8 | SP-GND-1 | MAXXECUPRO-C1-L4 | 0.85 | no route | Engine GND | — | |
| W9 | SP-GND-1 | MAXXECUPRO-C2-H1 | 0.85 | no route | Engine ground 3 | — | |
| W10 | SP-GND-1 | MAXXECUPRO-C2-H2 | 0.85 | no route | Engine ground 3 | — | |
| W11 | SP-GND-1 | MAXXECUPRO-C2-H3 | 0.85 | no route | Engine ground 3 | — | |
| W12 | SP-GND-1 | MAXXECUPRO-C3-L4 | 0.85 | no route | ENGINE GROUND 2 | — | |
| W13 | OEM-3-O | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W14 | OEM-4-H | SP-0V-1 | 0.5 | no route | Crank pickup timing ground (CKP gnd) | — | |
| W15 | SP-0V-1 | MAXXECUPRO-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W16 | SP-0V-1 | MAXXECUPRO-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W17 | SP-0V-1 | MAXXECUPRO-C3-J2 | 0.5 | no route | SENSOR GND | — | |
| W18 | SP-0V-1 | MAXXECUPRO-C3-J3 | 0.5 | no route | SENSOR GND | — | |
| W19 | OEM-3-I | MAXXECUPRO-C1-G1 | 0.5 | no route | +5V sensor reference | — | |
| W20 | OEM-4-E | MAXXECUPRO-C1-H3 | 0.5 | no route | Crank position (CKP) sensor | — | |
| W21 | OEM-4-G | MAXXECUPRO-C1-H4 | 0.5 | no route | CAS SGC (cam sync) | — | |
| W22 | OEM-4-N | MAXXECUPRO-C1-A2 | 0.5 | no route | Ignition coil trigger (cyl 1&4) | — | |
| W23 | OEM-4-R | MAXXECUPRO-C1-A3 | 0.5 | no route | Ignition coil trigger (cyl 2&3) | — | |
| W24 | OEM-4-U | MAXXECUPRO-C1-K1 | 0.5 | no route | Injector 1 (cyl 1) | — | |
| W25 | OEM-4-V | MAXXECUPRO-C1-K2 | 0.5 | no route | Injector 2 (cyl 2) | — | |
| W26 | OEM-4-W | MAXXECUPRO-C1-M1 | 0.5 | no route | Injector 3 (cyl 3) | — | |
| W27 | OEM-4-X | MAXXECUPRO-C1-M2 | 0.5 | no route | Injector 4 (cyl 4) | — | |
| W28 | OEM-3-B | MAXXECUPRO-C1-J3 | 0.5 | no route | MAF sensor input | — | |
| W29 | OEM-3-F | MAXXECUPRO-C1-G2 | 0.5 | no route | Throttle position (TPS) | — | |
| W30 | OEM-3-G | MAXXECUPRO-C1-F1 | 0.5 | no route | Engine coolant temp (CLT) | — | |
| W31 | OEM-1-A | MAXXECUPRO-C1-B4 | 0.5 | no route | Cooling fan relay (low-side) | — | |
| W32 | OEM-1-B | MAXXECUPRO-C1-C4 | 0.5 | no route | A/C condenser fan relay | — | |
| W33 | OEM-1-G | MAXXECUPRO-C1-D4 | 0.5 | no route | A/C clutch relay | — | |
| W34 | OEM-1-U | MAXXECUPRO-C1-E4 | 0.5 | no route | Fuel pump relay (low-side) | — | |
| W35 | OEM-3-M | MAXXECUPRO-C1-D1 | 0.5 | no route | Front O2 heater control | — | |
| W36 | OEM-1-E | MAXXECUPRO-C1-A1 | 0.5 | no route | Check engine light (MIL) | — | |
| W37 | OEM-4-J | MAXXECUPRO-C1-B1 | 0.5 | no route | PRC solenoid (FPR control) | — | |
| W38 | OEM-4-O | MAXXECUPRO-C1-C1 | 0.5 | no route | EGR vent solenoid | — | |
| W39 | OEM-4-P | MAXXECUPRO-C1-A4 | 0.5 | no route | EGR vacuum solenoid | — | |
| W40 | OEM-4-Q | MAXXECUPRO-C4-G1 | 0.5 | no route | Idle air control (IAC) valve | — | |
| W41 | OEM-4-T | MAXXECUPRO-C4-G2 | 0.5 | no route | EVAP purge solenoid | — | |
| W42 | OEM-4-L | MAXXECUPRO-C4-G3 | 0.5 | no route | Tachometer output | — | |
| W43 | OEM-3-H | MAXXECUPRO-C1-J4 | 0.5 | no route | EGR boost sensor | — | |
| W44 | OEM-3-N | MAXXECUPRO-C3-C3 | 0.5 | no route | EGR boost sensor (2nd channel) | — | |
| W45 | OEM-3-C | MAXXECUPRO-C3-D1 | 0.5 | no route | Front O2 sensor input | — | |
| W46 | OEM-3-D | MAXXECUPRO-C3-D2 | 0.5 | no route | Rear O2 sensor input | — | |
| W47 | OEM-3-K | MAXXECUPRO-C1-F2 | 0.5 | no route | Intake air temp (IAT) | — | |
| W48 | OEM-3-J | MAXXECUPRO-C3-D3 | 0.5 | no route | EGR valve position sensor | — | |
| W49 | OEM-1-M | MAXXECUPRO-C1-K3 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W50 | OEM-1-C | MAXXECUPRO-C1-K4 | 0.5 | no route | Starter input (12V while cranking) | — | |
| W51 | OEM-1-K | MAXXECUPRO-C3-A3 | 0.5 | no route | A/C pressure switch (A/C request) | — | |
| W52 | OEM-1-L | MAXXECUPRO-C3-A4 | 0.5 | no route | Clutch switch | — | |
| W53 | OEM-1-Q | MAXXECUPRO-C4-D3 | 0.5 | no route | Brake switch | — | |
| W54 | OEM-3-L | MAXXECUPRO-C4-D4 | 0.5 | no route | Idle switch (closed throttle) | — | |
| W55 | OEM-3-P | MAXXECUPRO-C4-E1 | 0.5 | no route | Power steering pressure switch | — |
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 (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-4-F | Required OEM function "CAS SGT (cam trigger)" (trigger_in) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-B4 | MAXXECUPRO-C1-B4 "GPO 1" drives OEM-1-A Cooling fan relay (low-side) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-C4 | MAXXECUPRO-C1-C4 "GPO 2" drives OEM-1-B A/C condenser fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-D4 | MAXXECUPRO-C1-D4 "GPO 3" drives OEM-1-G A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-E4 | MAXXECUPRO-C1-E4 "GPO 4" drives OEM-1-U Fuel pump relay (low-side) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| info | NET_FAMILY | OEM-4-L ↔ MAXXECUPRO-C4-G3 | OEM-4-L "Tachometer output" [tacho_out] is wired to MAXXECUPRO-C4-G3 "GPO 25" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up. |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-4-I | 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 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-4 F: CAS SGT (cam trigger): no free cam_hall/cam_vr/frequency_in input on MaxxECU MaxxECU PRO Not wired: - OEM-4 I: Permanent +12V (battery): MaxxECU MaxxECU PRO has no battery-constant input; not needed - MAXXECUPRO-C3 K3: KEY IN 12V: 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 | AEM EMS 30-1720 Plug-and-Play adapter manual (1996-97 Miata) | https://static.summitracing.com/global/images/instructions/avm-30-1720.pdf | — | — | — |
| 4 | vendor_doc | MaxxECU GEN1 pinout (MINI / STREET / SPORT / V1 / RACE / PRO) | http://www.maxxecu.com/webhelp/wirings-maxxecu_pinout.html | archive | 2026-10-05 | 2e37b6814690 |
| 3 | community_copy | Mellens.net: 1996 Mazda Miata wiring diagrams (FSM-derived) | http://www.mellens.net/mazda/mazda_miata_extra_manual/1996_wiring.pdf | — | — | — |