AP1 2000–03 (F20C) → MaxxECU MaxxECU PRO REV10+ (auto)
AP1 2000–03 (F20C) — 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 | 70 wires · 11 connectors · 4 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-B-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-B-9 | 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-B-10 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-B-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B-20 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-B-22 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | MAXXECUPRO-C1-L4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | MAXXECUPRO-C2-H1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | MAXXECUPRO-C2-H2 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | MAXXECUPRO-C2-H3 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | MAXXECUPRO-C3-L4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-C-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-C-30 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-C-31 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C-7 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | MAXXECUPRO-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | MAXXECUPRO-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | MAXXECUPRO-C3-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | MAXXECUPRO-C3-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-19 | MAXXECUPRO-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-28 | MAXXECUPRO-C3-C2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-8 | MAXXECUPRO-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-C-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-C-20 | MAXXECUPRO-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-C-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-C-4 | MAXXECUPRO-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-C-12 | MAXXECUPRO-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-C-13 | MAXXECUPRO-C1-B2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-C-14 | MAXXECUPRO-C1-B3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-11 | MAXXECUPRO-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-3 | MAXXECUPRO-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B-4 | MAXXECUPRO-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-B-5 | MAXXECUPRO-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-15 | MAXXECUPRO-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-16 | MAXXECUPRO-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-17 | MAXXECUPRO-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-20 | MAXXECUPRO-C1-E4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-28 | MAXXECUPRO-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-B-12 | MAXXECUPRO-C3-G4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-C-1 | MAXXECUPRO-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-C-11 | MAXXECUPRO-C3-E1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-B-23 | MAXXECUPRO-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-1 | MAXXECUPRO-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-12 | MAXXECUPRO-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-18 | MAXXECUPRO-C4-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-2 | MAXXECUPRO-C4-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-3 | MAXXECUPRO-C4-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A-4 | MAXXECUPRO-C4-G4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-6 | MAXXECUPRO-C4-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-C-2 | MAXXECUPRO-C4-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A-19 | MAXXECUPRO-C4-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-C-17 | MAXXECUPRO-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-C-27 | MAXXECUPRO-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-23 | MAXXECUPRO-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-C-15 | MAXXECUPRO-C3-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-C-16 | MAXXECUPRO-C3-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-C-26 | MAXXECUPRO-C1-J1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-C-25 | MAXXECUPRO-C1-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-A-29 | MAXXECUPRO-C3-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-A-30 | MAXXECUPRO-C3-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-C-24 | MAXXECUPRO-C3-E2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-A-9 | MAXXECUPRO-C1-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-C-5 | MAXXECUPRO-C1-K4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-A-24 | MAXXECUPRO-C3-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-A-26 | MAXXECUPRO-C3-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-A-27 | MAXXECUPRO-C3-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-A-32 | MAXXECUPRO-C4-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W70 | OEM-C-10 | 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-M4 | MAXXECUPRO-C1-H1 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | MAXXECUPRO-C1-M4 | MAXXECUPRO-C1-L4 | open (OL) | +12 V supply must not touch power ground | |
| 3 | MAXXECUPRO-C1-H1 | MAXXECUPRO-C1-G1 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | MAXXECUPRO-C1-H1 | MAXXECUPRO-C3-C2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 5 | MAXXECUPRO-C1-L4 | MAXXECUPRO-C1-G1 | open (OL) | power ground must not touch 5 V sensor reference | |
| 6 | MAXXECUPRO-C1-L4 | MAXXECUPRO-C3-C2 | open (OL) | power ground must not touch 5 V sensor reference | |
| 7 | MAXXECUPRO-C1-M4 | MAXXECUPRO-C1-G1 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | MAXXECUPRO-C1-M4 | MAXXECUPRO-C3-C2 | 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 | — | W40 | — | 0.5 | OEM-A-28 | — | — | — |
| A2 | IGN 1 | — | W28 | — | 0.5 | OEM-C-4 | — | — | — |
| A3 | IGN 2 | — | W29 | — | 0.5 | OEM-C-12 | — | — | — |
| A4 | GPO 8/TACHO | — | W46 | — | 0.5 | OEM-A-12 | — | — | — |
| B1 | GPO 6 | — | W44 | — | 0.5 | OEM-B-23 | — | — | — |
| B2 | IGN 3 | — | W30 | — | 0.5 | OEM-C-13 | — | — | — |
| B3 | IGN 4 | — | W31 | — | 0.5 | OEM-C-14 | — | — | — |
| B4 | GPO 1 | — | W36 | — | 0.5 | OEM-A-15 | — | — | — |
| C1 | GPO 7 | — | W45 | — | 0.5 | OEM-A-1 | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W37 | — | 0.5 | OEM-A-16 | — | — | — |
| D1 | WBO2 Heater- | — | W42 | — | 0.5 | OEM-C-1 | — | — | — |
| D2 | IGN 7 | — | — | — | — | — | — | — | — |
| D3 | IGN 8 | — | — | — | — | — | — | — | — |
| D4 | GPO 3 | — | W38 | — | 0.5 | OEM-A-17 | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| E4 | GPO 4 | — | W39 | — | 0.5 | OEM-A-20 | — | — | — |
| F1 | CLT | — | — | — | — | — | — | — | — |
| F2 | IAT | — | — | — | — | — | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W22 | — | 0.5 | OEM-C-19 | — | — | — |
| G2 | TPS/AIN | — | W55 | — | 0.5 | OEM-C-27 | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W24 | — | 0.5 | OEM-C-8 | — | — | — |
| H4 | HOME | — | W26 | — | 0.5 | OEM-C-20 | — | — | — |
| J1 | AIN 1 (temperature) | — | W59 | — | 0.5 | OEM-C-26 | — | — | — |
| J2 | AIN 2 (temperature) | — | W60 | — | 0.5 | OEM-C-25 | — | — | — |
| J3 | AIN 3 (0-5V) | — | W54 | — | 0.5 | OEM-C-17 | — | — | — |
| J4 | AIN 4 (0-5V) | — | W56 | — | 0.5 | OEM-A-23 | — | — | — |
| K1 | INJ 1 | — | W32 | — | 0.5 | OEM-B-11 | — | — | — |
| K2 | INJ 2 | — | W33 | — | 0.5 | OEM-B-3 | — | — | — |
| K3 | DIN/VR 1 | — | W64 | — | 0.5 | OEM-A-9 | — | — | — |
| K4 | DIN/VR 2 | — | W65 | — | 0.5 | OEM-C-5 | — | — | — |
| L1 | INJ 8 | — | — | — | — | — | — | — | — |
| L2 | INJ 7 | — | — | — | — | — | — | — | — |
| L3 | INJ 6 | — | — | — | — | — | — | — | — |
| L4 | Engine GND | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W34 | — | 0.5 | OEM-B-4 | — | — | — |
| M2 | INJ 4 | — | W35 | — | 0.5 | OEM-B-5 | — | — | — |
| 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 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| H2 | Engine ground 3 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| H3 | Engine ground 3 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
MAXXECUPRO-C3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | DIN/VR 4 | — | W67 | — | 0.5 | OEM-A-26 | — | — | — |
| A2 | DIN/VR 5 | — | — | — | — | — | — | — | — |
| A3 | DIN 6 (SWITCH) | — | W66 | — | 0.5 | OEM-A-24 | — | — | — |
| A4 | DIN 7 (SWITCH) | — | W68 | — | 0.5 | OEM-A-27 | — | — | — |
| 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 | — | W23 | — | 0.5 | OEM-C-28 | — | — | — |
| C3 | ANALOG IN 5 (0-5V) | — | W57 | — | 0.5 | OEM-C-15 | — | — | — |
| C4 | GPO 19 (12V) | — | — | — | — | — | — | — | — |
| D1 | ANALOG IN 6 (0-5V) | — | W58 | — | 0.5 | OEM-C-16 | — | — | — |
| D2 | ANALOG IN 7 (0-5V) | — | W61 | — | 0.5 | OEM-A-29 | — | — | — |
| D3 | ANALOG IN 8 (0-5V) | — | W62 | — | 0.5 | OEM-A-30 | — | — | — |
| D4 | GPO 20 (12V) | — | — | — | — | — | — | — | — |
| E1 | GPO 10/WBO2 2 HTR | — | W43 | — | 0.5 | OEM-C-11 | — | — | — |
| E2 | ANALOG IN 9 (0-5V) | — | W63 | — | 0.5 | OEM-C-24 | — | — | — |
| 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) | — | W41 | — | 0.5 | OEM-B-12 | — | — | — |
| H1 | INJECTOR OUT 13 | — | — | — | — | — | — | — | — |
| H2 | IGNITION OUT 12 | — | — | — | — | — | — | — | — |
| H3 | IGNITION OUT 10 | — | — | — | — | — | — | — | — |
| H4 | GPO 16 (12V) | — | — | — | — | — | — | — | — |
| J1 | INJECTOR OUT 16 | — | — | — | — | — | — | — | — |
| J2 | SENSOR GND | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| J3 | SENSOR GND | — | W21 | — | 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 | — | W13 | — | 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) | — | W69 | — | 0.5 | OEM-A-32 | — | — | — |
| D4 | DIN 9 (switch) | — | W70 | — | 0.5 | OEM-C-10 | — | — | — |
| 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 | — | — | — | — | — | — | — | — |
| F3 | Knock 2 | — | — | — | — | — | — | — | — |
| F4 | Sensor GND3 / knock ground | — | — | — | — | — | — | — | — |
| G1 | GPO 23 | — | W47 | — | 0.5 | OEM-A-18 | — | — | — |
| G2 | GPO 24 | — | W48 | — | 0.5 | OEM-A-2 | — | — | — |
| G3 | GPO 25 | — | W49 | — | 0.5 | OEM-A-3 | — | — | — |
| G4 | GPO 26 | — | W50 | — | 0.5 | OEM-A-4 | — | — | — |
| H1 | GPO 27 | — | W51 | — | 0.5 | OEM-A-6 | — | — | — |
| H2 | GPO 28 | — | W52 | — | 0.5 | OEM-C-2 | — | — | — |
| H3 | GPO 29 | — | W53 | — | 0.5 | OEM-A-19 | — | — | — |
| H4 | GPO 30 | — | — | — | — | — | — | — | — |
OEM-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coolant temp gauge drive | — | W45 | — | 0.5 | MAXXECUPRO-C1-C1 | — | — | — |
| 2 | Air control valve solenoid | — | W48 | — | 0.5 | MAXXECUPRO-C4-G2 | — | — | — |
| 3 | Evap bypass solenoid | — | W49 | — | 0.5 | MAXXECUPRO-C4-G3 | — | — | — |
| 4 | Evap canister vent shut valve | — | W50 | — | 0.5 | MAXXECUPRO-C4-G4 | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | Evap canister purge valve | — | W51 | — | 0.5 | MAXXECUPRO-C4-H1 | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Vehicle speed sensor | — | W64 | — | 0.5 | MAXXECUPRO-C1-K3 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | W46 | — | 0.5 | MAXXECUPRO-C1-A4 | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W36 | — | 0.5 | MAXXECUPRO-C1-B4 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | W37 | — | 0.5 | MAXXECUPRO-C1-C4 | — | — | — |
| 17 | A/C clutch relay | — | W38 | — | 0.5 | MAXXECUPRO-C1-D4 | — | — | — |
| 18 | Check engine light (MIL) | — | W47 | — | 0.5 | MAXXECUPRO-C4-G1 | — | — | — |
| 19 | Tacho output | — | W53 | — | 0.5 | MAXXECUPRO-C4-H3 | — | — | — |
| 20 | Radiator fan relay | — | W39 | — | 0.5 | MAXXECUPRO-C1-E4 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | W56 | — | 0.5 | MAXXECUPRO-C1-J4 | — | — | — |
| 24 | Starter switch signal | — | W66 | — | 0.5 | MAXXECUPRO-C3-A3 | — | — | — |
| 25 | Immobilizer code | — | — | — | — | — | — | — | — |
| 26 | Power steering load detect | — | W67 | — | 0.5 | MAXXECUPRO-C3-A1 | — | — | — |
| 27 | A/C switch (request) | — | W68 | — | 0.5 | MAXXECUPRO-C3-A4 | — | — | — |
| 28 | Air pump relay | — | W40 | — | 0.5 | MAXXECUPRO-C1-A1 | — | — | — |
| 29 | Fuel tank pressure sensor | — | W61 | — | 0.5 | MAXXECUPRO-C3-D2 | — | — | — |
| 30 | Electrical load detector | — | W62 | — | 0.5 | MAXXECUPRO-C3-D3 | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | Brake switch | — | W69 | — | 0.5 | MAXXECUPRO-C4-D3 | — | — | — |
OEM-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Power source 1 (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Power ground 1 | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Injector 2 | — | W33 | — | 0.5 | MAXXECUPRO-C1-K2 | — | — | — |
| 4 | Injector 3 | — | W34 | — | 0.5 | MAXXECUPRO-C1-M1 | — | — | — |
| 5 | Injector 4 | — | W35 | — | 0.5 | MAXXECUPRO-C1-M2 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Power source 2 (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Power ground 2 | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Injector 1 | — | W32 | — | 0.5 | MAXXECUPRO-C1-K1 | — | — | — |
| 12 | VTEC solenoid | — | W41 | — | 0.5 | MAXXECUPRO-C3-G4 | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
| 17 | NC | — | — | — | — | — | — | — | — |
| 18 | NC | — | — | — | — | — | — | — | — |
| 19 | NC | — | — | — | — | — | — | — | — |
| 20 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Backup power (battery constant) | — | — | — | — | — | — | — | — |
| 22 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 23 | Idle air control valve | — | W44 | — | 0.5 | MAXXECUPRO-C1-B1 | — | — | — |
| 24 | NC | — | — | — | — | — | — | — | — |
| 25 | NC | — | — | — | — | — | — | — | — |
OEM-C
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Primary O2 heater | — | W42 | — | 0.5 | MAXXECUPRO-C1-D1 | — | — | — |
| 2 | Alternator control | — | W52 | — | 0.5 | MAXXECUPRO-C4-H2 | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W28 | — | 0.5 | MAXXECUPRO-C1-A2 | — | — | — |
| 5 | Alternator FR signal | — | W65 | — | 0.5 | MAXXECUPRO-C1-K4 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W24 | — | 0.5 | MAXXECUPRO-C1-H3 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W25 | — | 0.5 | SP-0V-1 | — | — | — |
| 10 | VTEC pressure switch | — | W70 | — | 0.5 | MAXXECUPRO-C4-D4 | — | — | — |
| 11 | Secondary O2 heater control | — | W43 | — | 0.5 | MAXXECUPRO-C3-E1 | — | — | — |
| 12 | Ignition coil 2 | — | W29 | — | 0.5 | MAXXECUPRO-C1-A3 | — | — | — |
| 13 | Ignition coil 3 | — | W30 | — | 0.5 | MAXXECUPRO-C1-B2 | — | — | — |
| 14 | Ignition coil 4 | — | W31 | — | 0.5 | MAXXECUPRO-C1-B3 | — | — | — |
| 15 | Secondary O2 sensor | — | W57 | — | 0.5 | MAXXECUPRO-C3-C3 | — | — | — |
| 16 | Primary O2 sensor | — | W58 | — | 0.5 | MAXXECUPRO-C3-D1 | — | — | — |
| 17 | MAP sensor | — | W54 | — | 0.5 | MAXXECUPRO-C1-J3 | — | — | — |
| 18 | Sensor ground 2 | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W22 | — | 0.5 | MAXXECUPRO-C1-G1 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W26 | — | 0.5 | MAXXECUPRO-C1-H4 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W27 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | W63 | — | 0.5 | MAXXECUPRO-C3-E2 | — | — | — |
| 25 | Intake air temp sensor | — | W60 | — | 0.5 | MAXXECUPRO-C1-J2 | — | — | — |
| 26 | Coolant temp sensor | — | W59 | — | 0.5 | MAXXECUPRO-C1-J1 | — | — | — |
| 27 | Throttle position sensor | — | W55 | — | 0.5 | MAXXECUPRO-C1-G2 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W23 | — | 0.5 | MAXXECUPRO-C3-C2 | — | — | — |
| 29 | Cam (TDC2) sensor + | — | — | — | — | — | — | — | — |
| 30 | Cam (TDC2) sensor − | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 31 | Timing ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-D
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | NC | — | — | — | — | — | — | — | — |
| 2 | NC | — | — | — | — | — | — | — | — |
| 3 | NC | — | — | — | — | — | — | — | — |
| 4 | NC | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | NC | — | — | — | — | — | — | — | — |
| 10 | NC | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | NC | — | — | — | — | — | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W20 | — | 0.5 | MAXXECUPRO-C3-J2 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-C-18 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-C-30 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-C-31 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-C-7 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | MAXXECUPRO-C1-H1 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | MAXXECUPRO-C1-H2 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | MAXXECUPRO-C3-J3 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | OEM-C-9 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | OEM-C-21 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-B-1 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-B-9 | — | — | — |
| 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-B-10 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-20 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-B-22 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | MAXXECUPRO-C1-L4 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | MAXXECUPRO-C2-H1 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | MAXXECUPRO-C2-H2 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | MAXXECUPRO-C2-H3 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | MAXXECUPRO-C3-L4 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Coolant temp gauge drive | low_side_out | MAXXECUPRO-C1-C1 | GPO 7 | low_side_out | corroborated | |
| OEM-A-10 | Service check signal | — | — | — | — | single_source | |
| OEM-A-11 | NC | — | — | — | — | unverified | |
| OEM-A-12 | Immobilizer indicator light | low_side_out | MAXXECUPRO-C1-A4 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-A-13 | Immobilizer enable signal | — | — | — | — | single_source | |
| OEM-A-14 | NC | — | — | — | — | unverified | |
| OEM-A-15 | Fuel pump relay (USDM) | low_side_out | MAXXECUPRO-C1-B4 | GPO 1 | low_side_out | corroborated | |
| OEM-A-16 | Fuel pump relay (JDM) | low_side_out | MAXXECUPRO-C1-C4 | GPO 2 | low_side_out | single_source | |
| OEM-A-17 | A/C clutch relay | low_side_out | MAXXECUPRO-C1-D4 | GPO 3 | low_side_out | corroborated | |
| OEM-A-18 | Check engine light (MIL) | low_side_out | MAXXECUPRO-C4-G1 | GPO 23 | low_side_out | corroborated | |
| OEM-A-19 | Tacho output | tacho_out | MAXXECUPRO-C4-H3 | GPO 29 | low_side_out | corroborated | |
| OEM-A-2 | Air control valve solenoid | low_side_out | MAXXECUPRO-C4-G2 | GPO 24 | low_side_out | single_source | |
| OEM-A-20 | Radiator fan relay | low_side_out | MAXXECUPRO-C1-E4 | GPO 4 | low_side_out | corroborated | |
| OEM-A-21 | K-Line | serial | — | — | — | single_source | |
| OEM-A-22 | NC | — | — | — | — | unverified | |
| OEM-A-23 | Secondary O2 sensor | lambda_nb_in | MAXXECUPRO-C1-J4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-A-24 | Starter switch signal | digital_in | MAXXECUPRO-C3-A3 | DIN 6 (SWITCH) | digital_in | corroborated | |
| OEM-A-25 | Immobilizer code | — | — | — | — | single_source | |
| OEM-A-26 | Power steering load detect | digital_in | MAXXECUPRO-C3-A1 | DIN/VR 4 | digital_in | corroborated | |
| OEM-A-27 | A/C switch (request) | digital_in | MAXXECUPRO-C3-A4 | DIN 7 (SWITCH) | digital_in | corroborated | |
| OEM-A-28 | Air pump relay | low_side_out | MAXXECUPRO-C1-A1 | GPO 5 | low_side_out | corroborated | |
| OEM-A-29 | Fuel tank pressure sensor | analog_in | MAXXECUPRO-C3-D2 | ANALOG IN 7 (0-5V) | analog_in | corroborated | |
| OEM-A-3 | Evap bypass solenoid | low_side_out | MAXXECUPRO-C4-G3 | GPO 25 | low_side_out | single_source | |
| OEM-A-30 | Electrical load detector | analog_in | MAXXECUPRO-C3-D3 | ANALOG IN 8 (0-5V) | analog_in | corroborated | |
| OEM-A-31 | NC | — | — | — | — | unverified | |
| OEM-A-32 | Brake switch | digital_in | MAXXECUPRO-C4-D3 | DIN 8 (switch) | digital_in | corroborated | |
| OEM-A-4 | Evap canister vent shut valve | low_side_out | MAXXECUPRO-C4-G4 | GPO 26 | low_side_out | single_source | |
| OEM-A-5 | NC | — | — | — | — | unverified | |
| OEM-A-6 | Evap canister purge valve | low_side_out | MAXXECUPRO-C4-H1 | GPO 27 | low_side_out | single_source | |
| OEM-A-7 | NC | — | — | — | — | unverified | |
| OEM-A-8 | NC | — | — | — | — | unverified | |
| OEM-A-9 | Vehicle speed sensor | digital_in | MAXXECUPRO-C1-K3 | DIN/VR 1 | digital_in | corroborated | |
| OEM-B-1 | Power source 1 (main relay) | power_in | MAXXECUPRO-C1-M4 + MAXXECUPRO-C3-M4 | +12V ECU power supply + 12V ECU 2 | power_in | corroborated | |
| OEM-B-10 | Power ground 2 | 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-B-11 | Injector 1 | injector_out | MAXXECUPRO-C1-K1 | INJ 1 | injector_out | corroborated | |
| OEM-B-12 | VTEC solenoid | high_side_out | MAXXECUPRO-C3-G4 | GPO 15 (12V) | high_side_out | corroborated | |
| OEM-B-13 | NC | — | — | — | — | unverified | |
| OEM-B-14 | NC | — | — | — | — | unverified | |
| OEM-B-15 | NC | — | — | — | — | unverified | |
| OEM-B-16 | NC | — | — | — | — | unverified | |
| OEM-B-17 | NC | — | — | — | — | unverified | |
| OEM-B-18 | NC | — | — | — | — | unverified | |
| OEM-B-19 | NC | — | — | — | — | unverified | |
| OEM-B-2 | Power ground 1 | 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-B-20 | 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-B-21 | Backup power (battery constant) | power_in | — | — | — | single_source | |
| OEM-B-22 | 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-B-23 | Idle air control valve | low_side_out | MAXXECUPRO-C1-B1 | GPO 6 | low_side_out | corroborated | |
| OEM-B-24 | NC | — | — | — | — | unverified | |
| OEM-B-25 | NC | — | — | — | — | unverified | |
| OEM-B-3 | Injector 2 | injector_out | MAXXECUPRO-C1-K2 | INJ 2 | injector_out | corroborated | |
| OEM-B-4 | Injector 3 | injector_out | MAXXECUPRO-C1-M1 | INJ 3 | injector_out | corroborated | |
| OEM-B-5 | Injector 4 | injector_out | MAXXECUPRO-C1-M2 | INJ 4 | injector_out | corroborated | |
| OEM-B-6 | NC | — | — | — | — | unverified | |
| OEM-B-7 | NC | — | — | — | — | unverified | |
| OEM-B-8 | NC | — | — | — | — | unverified | |
| OEM-B-9 | Power source 2 (main relay) | power_in | MAXXECUPRO-C1-M4 + MAXXECUPRO-C3-M4 | +12V ECU power supply + 12V ECU 2 | power_in | corroborated | |
| OEM-C-1 | Primary O2 heater | low_side_out | MAXXECUPRO-C1-D1 | WBO2 Heater- | low_side_out | corroborated | |
| OEM-C-10 | VTEC pressure switch | digital_in | MAXXECUPRO-C4-D4 | DIN 9 (switch) | digital_in | corroborated | |
| OEM-C-11 | Secondary O2 heater control | low_side_out | MAXXECUPRO-C3-E1 | GPO 10/WBO2 2 HTR | low_side_out | single_source | |
| OEM-C-12 | Ignition coil 2 | ignition_out | MAXXECUPRO-C1-A3 | IGN 2 | ignition_out | corroborated | |
| OEM-C-13 | Ignition coil 3 | ignition_out | MAXXECUPRO-C1-B2 | IGN 3 | ignition_out | corroborated | |
| OEM-C-14 | Ignition coil 4 | ignition_out | MAXXECUPRO-C1-B3 | IGN 4 | ignition_out | corroborated | |
| OEM-C-15 | Secondary O2 sensor | lambda_nb_in | MAXXECUPRO-C3-C3 | ANALOG IN 5 (0-5V) | analog_in | corroborated | |
| OEM-C-16 | Primary O2 sensor | lambda_nb_in | MAXXECUPRO-C3-D1 | ANALOG IN 6 (0-5V) | analog_in | corroborated | |
| OEM-C-17 | MAP sensor | analog_in | MAXXECUPRO-C1-J3 | AIN 3 (0-5V) | analog_in | corroborated | |
| OEM-C-18 | Sensor ground 2 | 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-C-19 | Sensor 5V supply 1 (MAP) | vref | MAXXECUPRO-C1-G1 | +5V sensor supply | vref | corroborated | |
| OEM-C-2 | Alternator control | low_side_out | MAXXECUPRO-C4-H2 | GPO 28 | low_side_out | single_source | |
| OEM-C-20 | Cam (TDC1) sensor + | trigger_in | MAXXECUPRO-C1-H4 | HOME | trigger_in | corroborated | |
| OEM-C-21 | Cam (TDC1) sensor − | trigger_in | MAXXECUPRO-C1-H1 + MAXXECUPRO-C1-H2 + MAXXECUPRO-C3-J2 + MAXXECUPRO-C3-J3 | Sensor GND + Trigger GND + SENSOR GND + SENSOR GND | sensor_ground | corroborated | |
| OEM-C-22 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-23 | NC | — | — | — | — | unverified | |
| OEM-C-24 | Air pump electric current sensor | analog_in | MAXXECUPRO-C3-E2 | ANALOG IN 9 (0-5V) | analog_in | single_source | |
| OEM-C-25 | Intake air temp sensor | temp_in | MAXXECUPRO-C1-J2 | AIN 2 (temperature) | temp_in | corroborated | |
| OEM-C-26 | Coolant temp sensor | temp_in | MAXXECUPRO-C1-J1 | AIN 1 (temperature) | temp_in | corroborated | |
| OEM-C-27 | Throttle position sensor | analog_in | MAXXECUPRO-C1-G2 | TPS/AIN | analog_in | corroborated | |
| OEM-C-28 | Sensor 5V supply 2 | vref | MAXXECUPRO-C3-C2 | +5V SENSOR SUPPLY 2 | vref | corroborated | |
| OEM-C-29 | Cam (TDC2) sensor + | trigger_in | — | — | — | corroborated | |
| OEM-C-3 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-30 | Cam (TDC2) sensor − | 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-C-31 | Timing 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-C-4 | Ignition coil 1 | ignition_out | MAXXECUPRO-C1-A2 | IGN 1 | ignition_out | corroborated | |
| OEM-C-5 | Alternator FR signal | digital_in | MAXXECUPRO-C1-K4 | DIN/VR 2 | digital_in | single_source | |
| OEM-C-6 | NC | — | — | — | — | unverified | |
| OEM-C-7 | Sensor ground 1 | 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-C-8 | Crank sensor + (CKP+) | trigger_in | MAXXECUPRO-C1-H3 | TRIGGER | trigger_in | corroborated | |
| OEM-C-9 | Crank sensor − (CKP−) | trigger_in | MAXXECUPRO-C1-H1 + MAXXECUPRO-C1-H2 + MAXXECUPRO-C3-J2 + MAXXECUPRO-C3-J3 | Sensor GND + Trigger GND + SENSOR GND + SENSOR GND | sensor_ground | corroborated | |
| OEM-D-1 | NC | — | — | — | — | unverified | |
| OEM-D-10 | NC | — | — | — | — | unverified | |
| OEM-D-11 | NC | — | — | — | — | unverified | |
| OEM-D-12 | NC | — | — | — | — | unverified | |
| OEM-D-13 | NC | — | — | — | — | unverified | |
| OEM-D-14 | NC | — | — | — | — | unverified | |
| OEM-D-15 | NC | — | — | — | — | unverified | |
| OEM-D-16 | NC | — | — | — | — | unverified | |
| OEM-D-2 | NC | — | — | — | — | unverified | |
| OEM-D-3 | NC | — | — | — | — | unverified | |
| OEM-D-4 | NC | — | — | — | — | unverified | |
| OEM-D-5 | NC | — | — | — | — | unverified | |
| OEM-D-6 | NC | — | — | — | — | unverified | |
| OEM-D-7 | NC | — | — | — | — | unverified | |
| OEM-D-8 | NC | — | — | — | — | unverified | |
| OEM-D-9 | NC | — | — | — | — | unverified |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-B-1 | SP-14V-1 | 0.85 | no route | Power source 1 (main relay) | — | |
| W2 | OEM-B-9 | SP-14V-1 | 0.85 | no route | Power source 2 (main relay) | — | |
| 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-B-10 | SP-GND-1 | 0.85 | no route | Power ground 2 | — | |
| W6 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W7 | OEM-B-20 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W8 | OEM-B-22 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W9 | SP-GND-1 | MAXXECUPRO-C1-L4 | 0.85 | no route | Engine GND | — | |
| W10 | SP-GND-1 | MAXXECUPRO-C2-H1 | 0.85 | no route | Engine ground 3 | — | |
| W11 | SP-GND-1 | MAXXECUPRO-C2-H2 | 0.85 | no route | Engine ground 3 | — | |
| W12 | SP-GND-1 | MAXXECUPRO-C2-H3 | 0.85 | no route | Engine ground 3 | — | |
| W13 | SP-GND-1 | MAXXECUPRO-C3-L4 | 0.85 | no route | ENGINE GROUND 2 | — | |
| W14 | OEM-C-18 | SP-0V-1 | 0.5 | no route | Sensor ground 2 | — | |
| W15 | OEM-C-30 | SP-0V-1 | 0.5 | no route | Cam (TDC2) sensor − | — | |
| W16 | OEM-C-31 | SP-0V-1 | 0.5 | no route | Timing ground | — | |
| W17 | OEM-C-7 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W18 | SP-0V-1 | MAXXECUPRO-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W19 | SP-0V-1 | MAXXECUPRO-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W20 | SP-0V-1 | MAXXECUPRO-C3-J2 | 0.5 | no route | SENSOR GND | — | |
| W21 | SP-0V-1 | MAXXECUPRO-C3-J3 | 0.5 | no route | SENSOR GND | — | |
| W22 | OEM-C-19 | MAXXECUPRO-C1-G1 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W23 | OEM-C-28 | MAXXECUPRO-C3-C2 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W24 | OEM-C-8 | MAXXECUPRO-C1-H3 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W25 | OEM-C-9 | SP-0V-1 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W26 | OEM-C-20 | MAXXECUPRO-C1-H4 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W27 | OEM-C-21 | SP-0V-1 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W28 | OEM-C-4 | MAXXECUPRO-C1-A2 | 0.5 | no route | Ignition coil 1 | — | |
| W29 | OEM-C-12 | MAXXECUPRO-C1-A3 | 0.5 | no route | Ignition coil 2 | — | |
| W30 | OEM-C-13 | MAXXECUPRO-C1-B2 | 0.5 | no route | Ignition coil 3 | — | |
| W31 | OEM-C-14 | MAXXECUPRO-C1-B3 | 0.5 | no route | Ignition coil 4 | — | |
| W32 | OEM-B-11 | MAXXECUPRO-C1-K1 | 0.5 | no route | Injector 1 | — | |
| W33 | OEM-B-3 | MAXXECUPRO-C1-K2 | 0.5 | no route | Injector 2 | — | |
| W34 | OEM-B-4 | MAXXECUPRO-C1-M1 | 0.5 | no route | Injector 3 | — | |
| W35 | OEM-B-5 | MAXXECUPRO-C1-M2 | 0.5 | no route | Injector 4 | — | |
| W36 | OEM-A-15 | MAXXECUPRO-C1-B4 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W37 | OEM-A-16 | MAXXECUPRO-C1-C4 | 0.5 | no route | Fuel pump relay (JDM) | — | |
| W38 | OEM-A-17 | MAXXECUPRO-C1-D4 | 0.5 | no route | A/C clutch relay | — | |
| W39 | OEM-A-20 | MAXXECUPRO-C1-E4 | 0.5 | no route | Radiator fan relay | — | |
| W40 | OEM-A-28 | MAXXECUPRO-C1-A1 | 0.5 | no route | Air pump relay | — | |
| W41 | OEM-B-12 | MAXXECUPRO-C3-G4 | 0.5 | no route | VTEC solenoid | — | |
| W42 | OEM-C-1 | MAXXECUPRO-C1-D1 | 0.5 | no route | Primary O2 heater | — | |
| W43 | OEM-C-11 | MAXXECUPRO-C3-E1 | 0.5 | no route | Secondary O2 heater control | — | |
| W44 | OEM-B-23 | MAXXECUPRO-C1-B1 | 0.5 | no route | Idle air control valve | — | |
| W45 | OEM-A-1 | MAXXECUPRO-C1-C1 | 0.5 | no route | Coolant temp gauge drive | — | |
| W46 | OEM-A-12 | MAXXECUPRO-C1-A4 | 0.5 | no route | Immobilizer indicator light | — | |
| W47 | OEM-A-18 | MAXXECUPRO-C4-G1 | 0.5 | no route | Check engine light (MIL) | — | |
| W48 | OEM-A-2 | MAXXECUPRO-C4-G2 | 0.5 | no route | Air control valve solenoid | — | |
| W49 | OEM-A-3 | MAXXECUPRO-C4-G3 | 0.5 | no route | Evap bypass solenoid | — | |
| W50 | OEM-A-4 | MAXXECUPRO-C4-G4 | 0.5 | no route | Evap canister vent shut valve | — | |
| W51 | OEM-A-6 | MAXXECUPRO-C4-H1 | 0.5 | no route | Evap canister purge valve | — | |
| W52 | OEM-C-2 | MAXXECUPRO-C4-H2 | 0.5 | no route | Alternator control | — | |
| W53 | OEM-A-19 | MAXXECUPRO-C4-H3 | 0.5 | no route | Tacho output | — | |
| W54 | OEM-C-17 | MAXXECUPRO-C1-J3 | 0.5 | no route | MAP sensor | — | |
| W55 | OEM-C-27 | MAXXECUPRO-C1-G2 | 0.5 | no route | Throttle position sensor | — | |
| W56 | OEM-A-23 | MAXXECUPRO-C1-J4 | 0.5 | no route | Secondary O2 sensor | — | |
| W57 | OEM-C-15 | MAXXECUPRO-C3-C3 | 0.5 | no route | Secondary O2 sensor | — | |
| W58 | OEM-C-16 | MAXXECUPRO-C3-D1 | 0.5 | no route | Primary O2 sensor | — | |
| W59 | OEM-C-26 | MAXXECUPRO-C1-J1 | 0.5 | no route | Coolant temp sensor | — | |
| W60 | OEM-C-25 | MAXXECUPRO-C1-J2 | 0.5 | no route | Intake air temp sensor | — | |
| W61 | OEM-A-29 | MAXXECUPRO-C3-D2 | 0.5 | no route | Fuel tank pressure sensor | — | |
| W62 | OEM-A-30 | MAXXECUPRO-C3-D3 | 0.5 | no route | Electrical load detector | — | |
| W63 | OEM-C-24 | MAXXECUPRO-C3-E2 | 0.5 | no route | Air pump electric current sensor | — | |
| W64 | OEM-A-9 | MAXXECUPRO-C1-K3 | 0.5 | no route | Vehicle speed sensor | — | |
| W65 | OEM-C-5 | MAXXECUPRO-C1-K4 | 0.5 | no route | Alternator FR signal | — | |
| W66 | OEM-A-24 | MAXXECUPRO-C3-A3 | 0.5 | no route | Starter switch signal | — | |
| W67 | OEM-A-26 | MAXXECUPRO-C3-A1 | 0.5 | no route | Power steering load detect | — | |
| W68 | OEM-A-27 | MAXXECUPRO-C3-A4 | 0.5 | no route | A/C switch (request) | — | |
| W69 | OEM-A-32 | MAXXECUPRO-C4-D3 | 0.5 | no route | Brake switch | — | |
| W70 | OEM-C-10 | MAXXECUPRO-C4-D4 | 0.5 | no route | VTEC pressure switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 179679-6 | TE | S2000 2000–05 ECU harness plug B (25P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179680-5 | TE | S2000 2000–05 ECU harness plug C (31P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179681-6 | TE | S2000 2000–05 ECU harness plug A (32P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | S2K-0005-ECU-D | Honda | S2000 2000–05 ECU plug D (P/N unknown) | 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 (10)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-A1 | MAXXECUPRO-C1-A1 "GPO 5" drives OEM-A-28 Air pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C1-B1 | MAXXECUPRO-C1-B1 "GPO 6" drives OEM-B-23 Idle air control valve (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-A-15 Fuel pump relay (USDM) (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-A-16 Fuel pump relay (JDM) (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-A-17 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-A-20 Radiator fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUPRO-C3-G4 | MAXXECUPRO-C3-G4 "GPO 15 (12V)" drives OEM-B-12 VTEC solenoid (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| info | NET_FAMILY | OEM-A-19 ↔ MAXXECUPRO-C4-H3 | OEM-A-19 "Tacho output" [tacho_out] is wired to MAXXECUPRO-C4-H3 "GPO 29" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up. |
| info | NET_FAMILY | OEM-C-9 ↔ MAXXECUPRO-C1-H2 | OEM-C-9 "Crank sensor − (CKP−)" [trigger_in] is wired to MAXXECUPRO-C1-H2 "Trigger GND" [sensor_ground]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 8 optional OEM pins are not mapped: OEM-A-10 Service check signal; OEM-A-13 Immobilizer enable signal; OEM-A-21 K-Line; OEM-A-25 Immobilizer code; OEM-B-21 Backup power (battery constant); OEM-C-22 Knock sensor; OEM-C-29 Cam (TDC2) sensor +; OEM-C-3 Knock sensor |
Accepted (0)
| Code | Subject | Reason | By |
|---|
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-B 21: Backup power (battery constant): MaxxECU MaxxECU PRO has no battery-constant input; not needed - OEM-C 29: Cam (TDC2) sensor +: no free cam_vr/cam_hall/frequency_in input on MaxxECU MaxxECU PRO - OEM-C 22: Knock sensor: 2 stock pins named "Knock sensor" without a documented polarity / pairing; wire by hand - OEM-C 3: Knock sensor: 2 stock pins named "Knock sensor" without a documented polarity / pairing; wire by hand - OEM-A 21: K-Line: no free k_line on MaxxECU MaxxECU PRO - OEM-A 10: Service check signal: not classified in the library; wire by hand - OEM-A 13: Immobilizer enable signal: not classified in the library; wire by hand - OEM-A 25: Immobilizer code: not classified in the library; wire by hand - 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 30-6052 Series 2 Plug & Play EMS, 2000–2005 S2000 (original ECU pinout) | https://documents.aemelectronics.com/techlibrary_30-6052_series_2_plug___play_ems.pdf | — | 2026-10-05 | 9f79620fff5a |
| 4 | vendor_doc | Haltech KB: F20C (AP1) engine | https://support.haltech.com/portal/en/kb/articles/f20c-ap1-engine | — | 2026-10-05 | e804da29d014 |
| 4 | vendor_doc | Link S2000 AP1 PlugIn installation manual | https://linkecu.com/documentation/S2000X.pdf | — | 2026-10-05 | d12b0ff3f006 |
| 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 |
| 2 | forum | AllPinouts: 2000–2005 Honda S2000 ECU | https://allpinouts.org/pinouts/connectors/car/2000-2005-honda-s2000-ecu/ | archive | 2026-10-05 | 81d874e0385d |
| 2 | forum | Autodata blog: ECU Pinout Honda S2000 2000-2004 | http://autodatas.blogspot.com/2012/11/ecu-pinout-honda-s2000-2000-2004.html | — | 2026-10-05 | 33b93af7640e |
| 2 | derived | Typical load estimates (relay coil ~0.2 A, high-Z injector ~1.2 A, VVT solenoid ~1 A) | — | — | — | — |