MX-5 Miata NB1 1999-00 (BP-4W) → MaxxECU MaxxECU PRO REV10+ (auto)
MX-5 Miata NB1 1999-00 (BP-4W) — MaxxECU — MaxxECU PRO
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 | 60 wires · 10 connectors · 3 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-1-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-3-M | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MAXXECUPRO-C1-M4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | MAXXECUPRO-C3-M4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-3-C | 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-F | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | MAXXECUPRO-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | MAXXECUPRO-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | MAXXECUPRO-C3-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | MAXXECUPRO-C3-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-2-I | MAXXECUPRO-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-J | MAXXECUPRO-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-H | MAXXECUPRO-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-F | MAXXECUPRO-C4-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-3-G | MAXXECUPRO-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-3-H | MAXXECUPRO-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-W | MAXXECUPRO-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-3-X | MAXXECUPRO-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-Y | MAXXECUPRO-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-3-Z | MAXXECUPRO-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-1-I | MAXXECUPRO-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-1-R | MAXXECUPRO-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-1-S | MAXXECUPRO-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-3-N | MAXXECUPRO-C1-E4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-U | MAXXECUPRO-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-3-V | MAXXECUPRO-C3-E1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-3-O | MAXXECUPRO-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-E | MAXXECUPRO-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-1-O | MAXXECUPRO-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-1-Q | MAXXECUPRO-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-M | MAXXECUPRO-C4-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-N | MAXXECUPRO-C4-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-O | MAXXECUPRO-C4-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-P | MAXXECUPRO-C4-G4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-3-L | MAXXECUPRO-C4-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-3-Q | MAXXECUPRO-C4-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-3-T | MAXXECUPRO-C4-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-3-U | MAXXECUPRO-C4-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-2-L | MAXXECUPRO-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-3-E | MAXXECUPRO-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-2-C | MAXXECUPRO-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-3-J | MAXXECUPRO-C3-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-2-E | MAXXECUPRO-C1-J1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-2-B | MAXXECUPRO-C1-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-2-A | MAXXECUPRO-C3-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-3-K | MAXXECUPRO-C3-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-3-S | MAXXECUPRO-C3-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-2-D | MAXXECUPRO-C1-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-1-F | MAXXECUPRO-C3-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-1-G | MAXXECUPRO-C3-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-1-P | MAXXECUPRO-C1-K4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-1-V | MAXXECUPRO-C4-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-3-I | MAXXECUPRO-C4-D4 | 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-M4 | MAXXECUPRO-C1-H1 | open (OL) | +12 V supply must not touch sensor ground | |
| 4 | MAXXECUPRO-C1-M4 | MAXXECUPRO-C1-L4 | open (OL) | +12 V supply must not touch power ground | |
| 5 | MAXXECUPRO-C1-M4 | MAXXECUPRO-C1-G1 | open (OL) | +12 V supply must not touch 5 V sensor reference |
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 | — | W34 | — | 0.5 | OEM-3-O | — | — | — |
| A2 | IGN 1 | — | W22 | — | 0.5 | OEM-3-G | — | — | — |
| A3 | IGN 2 | — | W23 | — | 0.5 | OEM-3-H | — | — | — |
| A4 | GPO 8/TACHO | — | W37 | — | 0.5 | OEM-1-Q | — | — | — |
| B1 | GPO 6 | — | W35 | — | 0.5 | OEM-1-E | — | — | — |
| B2 | IGN 3 | — | — | — | — | — | — | — | — |
| B3 | IGN 4 | — | — | — | — | — | — | — | — |
| B4 | GPO 1 | — | W28 | — | 0.5 | OEM-1-I | — | — | — |
| C1 | GPO 7 | — | W36 | — | 0.5 | OEM-1-O | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W29 | — | 0.5 | OEM-1-R | — | — | — |
| D1 | WBO2 Heater- | — | W32 | — | 0.5 | OEM-1-U | — | — | — |
| D2 | IGN 7 | — | — | — | — | — | — | — | — |
| D3 | IGN 8 | — | — | — | — | — | — | — | — |
| D4 | GPO 3 | — | W30 | — | 0.5 | OEM-1-S | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| E4 | GPO 4 | — | W31 | — | 0.5 | OEM-3-N | — | — | — |
| F1 | CLT | — | — | — | — | — | — | — | — |
| F2 | IAT | — | — | — | — | — | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W18 | — | 0.5 | OEM-2-I | — | — | — |
| G2 | TPS/AIN | — | W47 | — | 0.5 | OEM-3-E | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W19 | — | 0.5 | OEM-2-J | — | — | — |
| H4 | HOME | — | W20 | — | 0.5 | OEM-2-H | — | — | — |
| J1 | AIN 1 (temperature) | — | W50 | — | 0.5 | OEM-2-E | — | — | — |
| J2 | AIN 2 (temperature) | — | W51 | — | 0.5 | OEM-2-B | — | — | — |
| J3 | AIN 3 (0-5V) | — | W46 | — | 0.5 | OEM-2-L | — | — | — |
| J4 | AIN 4 (0-5V) | — | W48 | — | 0.5 | OEM-2-C | — | — | — |
| K1 | INJ 1 | — | W24 | — | 0.5 | OEM-3-W | — | — | — |
| K2 | INJ 2 | — | W25 | — | 0.5 | OEM-3-X | — | — | — |
| K3 | DIN/VR 1 | — | W55 | — | 0.5 | OEM-2-D | — | — | — |
| K4 | DIN/VR 2 | — | W58 | — | 0.5 | OEM-1-P | — | — | — |
| 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-3-Y | — | — | — |
| M2 | INJ 4 | — | W27 | — | 0.5 | OEM-3-Z | — | — | — |
| M3 | INJ 5 | — | — | — | — | — | — | — | — |
| M4 | +12V ECU power supply | — | W3 | — | 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) | — | W56 | — | 0.5 | OEM-1-F | — | — | — |
| A4 | DIN 7 (SWITCH) | — | W57 | — | 0.5 | OEM-1-G | — | — | — |
| 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) | — | W49 | — | 0.5 | OEM-3-J | — | — | — |
| C4 | GPO 19 (12V) | — | — | — | — | — | — | — | — |
| D1 | ANALOG IN 6 (0-5V) | — | W52 | — | 0.5 | OEM-2-A | — | — | — |
| D2 | ANALOG IN 7 (0-5V) | — | W53 | — | 0.5 | OEM-3-K | — | — | — |
| D3 | ANALOG IN 8 (0-5V) | — | W54 | — | 0.5 | OEM-3-S | — | — | — |
| D4 | GPO 20 (12V) | — | — | — | — | — | — | — | — |
| E1 | GPO 10/WBO2 2 HTR | — | W33 | — | 0.5 | OEM-3-V | — | — | — |
| 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 | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| J3 | SENSOR GND | — | W17 | — | 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 | — | W4 | — | 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) | — | W59 | — | 0.5 | OEM-1-V | — | — | — |
| D4 | DIN 9 (switch) | — | W60 | — | 0.5 | OEM-3-I | — | — | — |
| E1 | DIN 10 (switch) | — | — | — | — | — | — | — | — |
| E2 | DIN 11 (switch) | — | — | — | — | — | — | — | — |
| E3 | +5V sensor supply 3 | — | — | — | — | — | — | — | — |
| E4 | 5-10V sensor supply | — | — | — | — | — | — | — | — |
| F1 | GPO 23-30 flyback | — | — | — | — | — | — | — | — |
| F2 | Knock 1 | — | W21 | — | 0.5 | OEM-2-F | — | — | — |
| F3 | Knock 2 | — | — | — | — | — | — | — | — |
| F4 | Sensor GND3 / knock ground | — | — | — | — | — | — | — | — |
| G1 | GPO 23 | — | W38 | — | 0.5 | OEM-2-M | — | — | — |
| G2 | GPO 24 | — | W39 | — | 0.5 | OEM-2-N | — | — | — |
| G3 | GPO 25 | — | W40 | — | 0.5 | OEM-2-O | — | — | — |
| G4 | GPO 26 | — | W41 | — | 0.5 | OEM-2-P | — | — | — |
| H1 | GPO 27 | — | W42 | — | 0.5 | OEM-3-L | — | — | — |
| H2 | GPO 28 | — | W43 | — | 0.5 | OEM-3-Q | — | — | — |
| H3 | GPO 29 | — | W44 | — | 0.5 | OEM-3-T | — | — | — |
| H4 | GPO 30 | — | W45 | — | 0.5 | OEM-3-U | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | — | — | — | — | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W35 | — | 0.5 | MAXXECUPRO-C1-B1 | — | — | — |
| F | Brake switch | — | W56 | — | 0.5 | MAXXECUPRO-C3-A3 | — | — | — |
| G | Power steering pressure switch | — | W57 | — | 0.5 | MAXXECUPRO-C3-A4 | — | — | — |
| I | Condenser fan relay | — | W28 | — | 0.5 | MAXXECUPRO-C1-B4 | — | — | — |
| O | Alternator control | — | W36 | — | 0.5 | MAXXECUPRO-C1-C1 | — | — | — |
| P | A/C request | — | W58 | — | 0.5 | MAXXECUPRO-C1-K4 | — | — | — |
| Q | Charge lamp | — | W37 | — | 0.5 | MAXXECUPRO-C1-A4 | — | — | — |
| R | Cooling fan relay | — | W29 | — | 0.5 | MAXXECUPRO-C1-C4 | — | — | — |
| S | A/C clutch relay | — | W30 | — | 0.5 | MAXXECUPRO-C1-D4 | — | — | — |
| U | Front O2 heater | — | W32 | — | 0.5 | MAXXECUPRO-C1-D1 | — | — | — |
| V | Neutral switch | — | W59 | — | 0.5 | MAXXECUPRO-C4-D3 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Fuel tank pressure | — | W52 | — | 0.5 | MAXXECUPRO-C3-D1 | — | — | — |
| B | Intake air temperature (IAT) | — | W51 | — | 0.5 | MAXXECUPRO-C1-J2 | — | — | — |
| C | Front O2 signal | — | W48 | — | 0.5 | MAXXECUPRO-C1-J4 | — | — | — |
| D | Vehicle speed | — | W55 | — | 0.5 | MAXXECUPRO-C1-K3 | — | — | — |
| E | Coolant temperature (ECT) | — | W50 | — | 0.5 | MAXXECUPRO-C1-J1 | — | — | — |
| F | Knock sensor | — | W21 | — | 0.5 | MAXXECUPRO-C4-F2 | — | — | — |
| H | Cam position (CMP) | — | W20 | — | 0.5 | MAXXECUPRO-C1-H4 | — | — | — |
| I | +5V sensor supply | — | W18 | — | 0.5 | MAXXECUPRO-C1-G1 | — | — | — |
| J | Crank position (CKP) | — | W19 | — | 0.5 | MAXXECUPRO-C1-H3 | — | — | — |
| K | Tachometer output | — | — | — | — | — | — | — | — |
| L | Mass air flow (MAF) | — | W46 | — | 0.5 | MAXXECUPRO-C1-J3 | — | — | — |
| M | EGR valve | — | W38 | — | 0.5 | MAXXECUPRO-C4-G1 | — | — | — |
| N | EGR valve | — | W39 | — | 0.5 | MAXXECUPRO-C4-G2 | — | — | — |
| O | EGR valve | — | W40 | — | 0.5 | MAXXECUPRO-C4-G3 | — | — | — |
| P | EGR valve | — | W41 | — | 0.5 | MAXXECUPRO-C4-G4 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Throttle position (TPS) | — | W47 | — | 0.5 | MAXXECUPRO-C1-G2 | — | — | — |
| F | Signal ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W22 | — | 0.5 | MAXXECUPRO-C1-A2 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W23 | — | 0.5 | MAXXECUPRO-C1-A3 | — | — | — |
| I | Clutch switch | — | W60 | — | 0.5 | MAXXECUPRO-C4-D4 | — | — | — |
| J | Rear O2 signal | — | W49 | — | 0.5 | MAXXECUPRO-C3-C3 | — | — | — |
| K | Fuel level | — | W53 | — | 0.5 | MAXXECUPRO-C3-D2 | — | — | — |
| L | Evap purge solenoid | — | W42 | — | 0.5 | MAXXECUPRO-C4-H1 | — | — | — |
| M | ISC valve +14V feed | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| N | Fuel pump relay | — | W31 | — | 0.5 | MAXXECUPRO-C1-E4 | — | — | — |
| O | ISC valve low side | — | W34 | — | 0.5 | MAXXECUPRO-C1-A1 | — | — | — |
| Q | VICS solenoid (intake butterflies) | — | W43 | — | 0.5 | MAXXECUPRO-C4-H2 | — | — | — |
| S | EGR boost sensor | — | W54 | — | 0.5 | MAXXECUPRO-C3-D3 | — | — | — |
| T | EGR boost solenoid | — | W44 | — | 0.5 | MAXXECUPRO-C4-H3 | — | — | — |
| U | Canister drain cut valve (CDCV) | — | W45 | — | 0.5 | MAXXECUPRO-C4-H4 | — | — | — |
| V | Rear O2 heater | — | W33 | — | 0.5 | MAXXECUPRO-C3-E1 | — | — | — |
| W | Injector 1 | — | W24 | — | 0.5 | MAXXECUPRO-C1-K1 | — | — | — |
| X | Injector 2 | — | W25 | — | 0.5 | MAXXECUPRO-C1-K2 | — | — | — |
| Y | Injector 3 | — | W26 | — | 0.5 | MAXXECUPRO-C1-M1 | — | — | — |
| Z | Injector 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-F | — | — | — |
| 1 | — | — | W14 | — | 0.5 | MAXXECUPRO-C1-H1 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | MAXXECUPRO-C1-H2 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | MAXXECUPRO-C3-J2 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | MAXXECUPRO-C3-J3 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-3-M | — | — | — |
| 1 | — | — | W3 | — | 0.85 | MAXXECUPRO-C1-M4 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | MAXXECUPRO-C3-M4 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-3-C | — | — | — |
| 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 | Constant +12V | power_in | — | — | — | single_source | |
| OEM-1-B | ECU power +14V (main relay) | power_in | MAXXECUPRO-C1-M4 + MAXXECUPRO-C3-M4 | +12V ECU power supply + 12V ECU 2 | power_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | MAXXECUPRO-C1-B1 | GPO 6 | low_side_out | single_source | |
| OEM-1-F | Brake switch | digital_in | MAXXECUPRO-C3-A3 | DIN 6 (SWITCH) | digital_in | single_source | |
| OEM-1-G | Power steering pressure switch | digital_in | MAXXECUPRO-C3-A4 | DIN 7 (SWITCH) | digital_in | single_source | |
| OEM-1-I | Condenser fan relay | low_side_out | MAXXECUPRO-C1-B4 | GPO 1 | low_side_out | single_source | |
| OEM-1-O | Alternator control | low_side_out | MAXXECUPRO-C1-C1 | GPO 7 | low_side_out | single_source | |
| OEM-1-P | A/C request | digital_in | MAXXECUPRO-C1-K4 | DIN/VR 2 | digital_in | single_source | |
| OEM-1-Q | Charge lamp | low_side_out | MAXXECUPRO-C1-A4 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-1-R | Cooling fan relay | low_side_out | MAXXECUPRO-C1-C4 | GPO 2 | low_side_out | single_source | |
| OEM-1-S | A/C clutch relay | low_side_out | MAXXECUPRO-C1-D4 | GPO 3 | low_side_out | single_source | |
| OEM-1-U | Front O2 heater | low_side_out | MAXXECUPRO-C1-D1 | WBO2 Heater- | low_side_out | single_source | |
| OEM-1-V | Neutral switch | digital_in | MAXXECUPRO-C4-D3 | DIN 8 (switch) | digital_in | single_source | |
| OEM-2-A | Fuel tank pressure | analog_in | MAXXECUPRO-C3-D1 | ANALOG IN 6 (0-5V) | analog_in | single_source | |
| OEM-2-B | Intake air temperature (IAT) | temp_in | MAXXECUPRO-C1-J2 | AIN 2 (temperature) | temp_in | single_source | |
| OEM-2-C | Front O2 signal | lambda_nb_in | MAXXECUPRO-C1-J4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-2-D | Vehicle speed | digital_in | MAXXECUPRO-C1-K3 | DIN/VR 1 | digital_in | single_source | |
| OEM-2-E | Coolant temperature (ECT) | temp_in | MAXXECUPRO-C1-J1 | AIN 1 (temperature) | temp_in | single_source | |
| OEM-2-F | Knock sensor | knock_in | MAXXECUPRO-C4-F2 | Knock 1 | knock_in | single_source | |
| OEM-2-H | Cam position (CMP) | trigger_in | MAXXECUPRO-C1-H4 | HOME | trigger_in | single_source | |
| OEM-2-I | +5V sensor supply | vref | MAXXECUPRO-C1-G1 | +5V sensor supply | vref | single_source | |
| OEM-2-J | Crank position (CKP) | trigger_in | MAXXECUPRO-C1-H3 | TRIGGER | trigger_in | single_source | |
| OEM-2-K | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-2-L | Mass air flow (MAF) | analog_in | MAXXECUPRO-C1-J3 | AIN 3 (0-5V) | analog_in | single_source | |
| OEM-2-M | EGR valve | low_side_out | MAXXECUPRO-C4-G1 | GPO 23 | low_side_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | MAXXECUPRO-C4-G2 | GPO 24 | low_side_out | single_source | |
| OEM-2-O | EGR valve | low_side_out | MAXXECUPRO-C4-G3 | GPO 25 | low_side_out | single_source | |
| OEM-2-P | EGR valve | low_side_out | MAXXECUPRO-C4-G4 | GPO 26 | low_side_out | single_source | |
| OEM-3-A | Power 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 | single_source | |
| OEM-3-B | Power 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 | single_source | |
| OEM-3-C | Power 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 | single_source | |
| OEM-3-E | Throttle position (TPS) | analog_in | MAXXECUPRO-C1-G2 | TPS/AIN | analog_in | single_source | |
| OEM-3-F | Signal 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 | single_source | |
| OEM-3-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | MAXXECUPRO-C1-A2 | IGN 1 | ignition_out | single_source | |
| OEM-3-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | MAXXECUPRO-C1-A3 | IGN 2 | ignition_out | single_source | |
| OEM-3-I | Clutch switch | digital_in | MAXXECUPRO-C4-D4 | DIN 9 (switch) | digital_in | single_source | |
| OEM-3-J | Rear O2 signal | lambda_nb_in | MAXXECUPRO-C3-C3 | ANALOG IN 5 (0-5V) | analog_in | single_source | |
| OEM-3-K | Fuel level | analog_in | MAXXECUPRO-C3-D2 | ANALOG IN 7 (0-5V) | analog_in | single_source | |
| OEM-3-L | Evap purge solenoid | low_side_out | MAXXECUPRO-C4-H1 | GPO 27 | low_side_out | single_source | |
| OEM-3-M | ISC valve +14V feed | power_in | MAXXECUPRO-C1-M4 + MAXXECUPRO-C3-M4 | +12V ECU power supply + 12V ECU 2 | power_in | single_source | |
| OEM-3-N | Fuel pump relay | low_side_out | MAXXECUPRO-C1-E4 | GPO 4 | low_side_out | single_source | |
| OEM-3-O | ISC valve low side | low_side_out | MAXXECUPRO-C1-A1 | GPO 5 | low_side_out | single_source | |
| OEM-3-Q | VICS solenoid (intake butterflies) | low_side_out | MAXXECUPRO-C4-H2 | GPO 28 | low_side_out | single_source | |
| OEM-3-S | EGR boost sensor | analog_in | MAXXECUPRO-C3-D3 | ANALOG IN 8 (0-5V) | analog_in | single_source | |
| OEM-3-T | EGR boost solenoid | low_side_out | MAXXECUPRO-C4-H3 | GPO 29 | low_side_out | single_source | |
| OEM-3-U | Canister drain cut valve (CDCV) | low_side_out | MAXXECUPRO-C4-H4 | GPO 30 | low_side_out | single_source | |
| OEM-3-V | Rear O2 heater | low_side_out | MAXXECUPRO-C3-E1 | GPO 10/WBO2 2 HTR | low_side_out | single_source | |
| OEM-3-W | Injector 1 | injector_out | MAXXECUPRO-C1-K1 | INJ 1 | injector_out | single_source | |
| OEM-3-X | Injector 2 | injector_out | MAXXECUPRO-C1-K2 | INJ 2 | injector_out | single_source | |
| OEM-3-Y | Injector 3 | injector_out | MAXXECUPRO-C1-M1 | INJ 3 | injector_out | single_source | |
| OEM-3-Z | Injector 4 | injector_out | MAXXECUPRO-C1-M2 | INJ 4 | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W2 | OEM-3-M | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W3 | SP-14V-1 | MAXXECUPRO-C1-M4 | 0.85 | no route | +12V ECU power supply | — | |
| W4 | SP-14V-1 | MAXXECUPRO-C3-M4 | 0.85 | no route | 12V ECU 2 | — | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-3-C | SP-GND-1 | 0.85 | no route | Power 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-F | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W14 | SP-0V-1 | MAXXECUPRO-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W15 | SP-0V-1 | MAXXECUPRO-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W16 | SP-0V-1 | MAXXECUPRO-C3-J2 | 0.5 | no route | SENSOR GND | — | |
| W17 | SP-0V-1 | MAXXECUPRO-C3-J3 | 0.5 | no route | SENSOR GND | — | |
| W18 | OEM-2-I | MAXXECUPRO-C1-G1 | 0.5 | no route | +5V sensor supply | — | |
| W19 | OEM-2-J | MAXXECUPRO-C1-H3 | 0.5 | no route | Crank position (CKP) | — | |
| W20 | OEM-2-H | MAXXECUPRO-C1-H4 | 0.5 | no route | Cam position (CMP) | — | |
| W21 | OEM-2-F | MAXXECUPRO-C4-F2 | 0.5 | no route | Knock sensor | — | |
| W22 | OEM-3-G | MAXXECUPRO-C1-A2 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W23 | OEM-3-H | MAXXECUPRO-C1-A3 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W24 | OEM-3-W | MAXXECUPRO-C1-K1 | 0.5 | no route | Injector 1 | — | |
| W25 | OEM-3-X | MAXXECUPRO-C1-K2 | 0.5 | no route | Injector 2 | — | |
| W26 | OEM-3-Y | MAXXECUPRO-C1-M1 | 0.5 | no route | Injector 3 | — | |
| W27 | OEM-3-Z | MAXXECUPRO-C1-M2 | 0.5 | no route | Injector 4 | — | |
| W28 | OEM-1-I | MAXXECUPRO-C1-B4 | 0.5 | no route | Condenser fan relay | — | |
| W29 | OEM-1-R | MAXXECUPRO-C1-C4 | 0.5 | no route | Cooling fan relay | — | |
| W30 | OEM-1-S | MAXXECUPRO-C1-D4 | 0.5 | no route | A/C clutch relay | — | |
| W31 | OEM-3-N | MAXXECUPRO-C1-E4 | 0.5 | no route | Fuel pump relay | — | |
| W32 | OEM-1-U | MAXXECUPRO-C1-D1 | 0.5 | no route | Front O2 heater | — | |
| W33 | OEM-3-V | MAXXECUPRO-C3-E1 | 0.5 | no route | Rear O2 heater | — | |
| W34 | OEM-3-O | MAXXECUPRO-C1-A1 | 0.5 | no route | ISC valve low side | — | |
| W35 | OEM-1-E | MAXXECUPRO-C1-B1 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W36 | OEM-1-O | MAXXECUPRO-C1-C1 | 0.5 | no route | Alternator control | — | |
| W37 | OEM-1-Q | MAXXECUPRO-C1-A4 | 0.5 | no route | Charge lamp | — | |
| W38 | OEM-2-M | MAXXECUPRO-C4-G1 | 0.5 | no route | EGR valve | — | |
| W39 | OEM-2-N | MAXXECUPRO-C4-G2 | 0.5 | no route | EGR valve | — | |
| W40 | OEM-2-O | MAXXECUPRO-C4-G3 | 0.5 | no route | EGR valve | — | |
| W41 | OEM-2-P | MAXXECUPRO-C4-G4 | 0.5 | no route | EGR valve | — | |
| W42 | OEM-3-L | MAXXECUPRO-C4-H1 | 0.5 | no route | Evap purge solenoid | — | |
| W43 | OEM-3-Q | MAXXECUPRO-C4-H2 | 0.5 | no route | VICS solenoid (intake butterflies) | — | |
| W44 | OEM-3-T | MAXXECUPRO-C4-H3 | 0.5 | no route | EGR boost solenoid | — | |
| W45 | OEM-3-U | MAXXECUPRO-C4-H4 | 0.5 | no route | Canister drain cut valve (CDCV) | — | |
| W46 | OEM-2-L | MAXXECUPRO-C1-J3 | 0.5 | no route | Mass air flow (MAF) | — | |
| W47 | OEM-3-E | MAXXECUPRO-C1-G2 | 0.5 | no route | Throttle position (TPS) | — | |
| W48 | OEM-2-C | MAXXECUPRO-C1-J4 | 0.5 | no route | Front O2 signal | — | |
| W49 | OEM-3-J | MAXXECUPRO-C3-C3 | 0.5 | no route | Rear O2 signal | — | |
| W50 | OEM-2-E | MAXXECUPRO-C1-J1 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W51 | OEM-2-B | MAXXECUPRO-C1-J2 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W52 | OEM-2-A | MAXXECUPRO-C3-D1 | 0.5 | no route | Fuel tank pressure | — | |
| W53 | OEM-3-K | MAXXECUPRO-C3-D2 | 0.5 | no route | Fuel level | — | |
| W54 | OEM-3-S | MAXXECUPRO-C3-D3 | 0.5 | no route | EGR boost sensor | — | |
| W55 | OEM-2-D | MAXXECUPRO-C1-K3 | 0.5 | no route | Vehicle speed | — | |
| W56 | OEM-1-F | MAXXECUPRO-C3-A3 | 0.5 | no route | Brake switch | — | |
| W57 | OEM-1-G | MAXXECUPRO-C3-A4 | 0.5 | no route | Power steering pressure switch | — | |
| W58 | OEM-1-P | MAXXECUPRO-C1-K4 | 0.5 | no route | A/C request | — | |
| W59 | OEM-1-V | MAXXECUPRO-C4-D3 | 0.5 | no route | Neutral switch | — | |
| W60 | OEM-3-I | MAXXECUPRO-C4-D4 | 0.5 | no route | Clutch switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 174514-6 | TE | AMP Multilock .040/.070 hybrid 16-pin female harness plug (Miata NB1 ECU) | 1.000 | ea |
| connector | 174515-6 | TE | AMP Multilock .040/.070 hybrid 22-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
| connector | 174516-6 | TE | AMP Multilock .040/.070 hybrid 26-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-A1 | MAXXECUPRO-C1-A1 "GPO 5" drives OEM-3-O ISC valve low side (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-B4 | MAXXECUPRO-C1-B4 "GPO 1" drives OEM-1-I Condenser fan relay (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-R Cooling 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-S 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-3-N Fuel pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| info | UNMAPPED | OEM | 1 optional OEM pins are not mapped: OEM-2-K Tachometer output |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-1-A | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-1 A: Constant +12V: MaxxECU MaxxECU PRO has no battery-constant input; not needed - OEM-2 K: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MaxxECU MaxxECU PRO - 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 | Link G4X MX5NB1X install manual (NB1 1999-00) | https://linkecu.com/documentation/MX5XNB1.pdf | archive | 2026-10-05 | 2e36c91270cc |
| 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 |