BMW 3 Series E36 1990–2000 (M50/M52) → MaxxECU MaxxECU PRO REV10+ (auto)
BMW 3 Series E36 1990–2000 (M50/M52) — 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 | 56 wires · 9 connectors · 1 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-X-54 | 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-X-15 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-X-34 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-X-55 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-X-6 | 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-X-28 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-X-40 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-X-43 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-X-44 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-X-71 | 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-X-59 | MAXXECUPRO-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-X-16 | MAXXECUPRO-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-X-17 | MAXXECUPRO-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-X-70 | MAXXECUPRO-C4-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-X-69 | MAXXECUPRO-C4-F3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-X-50 | MAXXECUPRO-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-X-51 | MAXXECUPRO-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-X-52 | MAXXECUPRO-C1-B2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-X-23 | MAXXECUPRO-C1-B3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-X-25 | MAXXECUPRO-C1-C2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-X-24 | MAXXECUPRO-C1-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-X-33 | MAXXECUPRO-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-X-32 | MAXXECUPRO-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-X-31 | MAXXECUPRO-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-X-5 | MAXXECUPRO-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-X-3 | MAXXECUPRO-C1-M3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-X-4 | MAXXECUPRO-C1-L3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-X-45 | SP-SHD-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | SP-SHD-1 | MAXXECUPRO-C3-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-X-56 | MAXXECUPRO-C3-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-X-1 | MAXXECUPRO-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-X-27 | MAXXECUPRO-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-X-38 | MAXXECUPRO-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-X-2 | MAXXECUPRO-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-X-29 | MAXXECUPRO-C1-E4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-X-36 | MAXXECUPRO-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-X-7 | MAXXECUPRO-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-X-8 | MAXXECUPRO-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-X-47 | MAXXECUPRO-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-X-41 | MAXXECUPRO-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-X-73 | MAXXECUPRO-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-X-13 | MAXXECUPRO-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-X-78 | MAXXECUPRO-C1-J1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-X-77 | MAXXECUPRO-C1-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-X-42 | MAXXECUPRO-C1-K3 | 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-H1 | MAXXECUPRO-C1-G1 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 2 | MAXXECUPRO-C1-H1 | MAXXECUPRO-C1-M4 | open (OL) | sensor ground must not touch +12 V supply | |
| 3 | MAXXECUPRO-C1-L4 | MAXXECUPRO-C1-G1 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | MAXXECUPRO-C1-L4 | MAXXECUPRO-C1-M4 | open (OL) | power ground must not touch +12 V supply | |
| 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 | — | W47 | — | 0.5 | OEM-X-36 | — | — | — |
| A2 | IGN 1 | — | W27 | — | 0.5 | OEM-X-50 | — | — | — |
| A3 | IGN 2 | — | W28 | — | 0.5 | OEM-X-51 | — | — | — |
| A4 | GPO 8/TACHO | — | W50 | — | 0.5 | OEM-X-47 | — | — | — |
| B1 | GPO 6 | — | W48 | — | 0.5 | OEM-X-7 | — | — | — |
| B2 | IGN 3 | — | W29 | — | 0.5 | OEM-X-52 | — | — | — |
| B3 | IGN 4 | — | W30 | — | 0.5 | OEM-X-23 | — | — | — |
| B4 | GPO 1 | — | W42 | — | 0.5 | OEM-X-1 | — | — | — |
| C1 | GPO 7 | — | W49 | — | 0.5 | OEM-X-8 | — | — | — |
| C2 | IGN 5 | — | W31 | — | 0.5 | OEM-X-25 | — | — | — |
| C3 | IGN 6 | — | W32 | — | 0.5 | OEM-X-24 | — | — | — |
| C4 | GPO 2 | — | W43 | — | 0.5 | OEM-X-27 | — | — | — |
| D1 | WBO2 Heater- | — | W44 | — | 0.5 | OEM-X-38 | — | — | — |
| D2 | IGN 7 | — | — | — | — | — | — | — | — |
| D3 | IGN 8 | — | — | — | — | — | — | — | — |
| D4 | GPO 3 | — | W45 | — | 0.5 | OEM-X-2 | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| E4 | GPO 4 | — | W46 | — | 0.5 | OEM-X-29 | — | — | — |
| F1 | CLT | — | — | — | — | — | — | — | — |
| F2 | IAT | — | — | — | — | — | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W22 | — | 0.5 | OEM-X-59 | — | — | — |
| G2 | TPS/AIN | — | W52 | — | 0.5 | OEM-X-73 | — | — | — |
| 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 | — | W23 | — | 0.5 | OEM-X-16 | — | — | — |
| H4 | HOME | — | W24 | — | 0.5 | OEM-X-17 | — | — | — |
| J1 | AIN 1 (temperature) | — | W54 | — | 0.5 | OEM-X-78 | — | — | — |
| J2 | AIN 2 (temperature) | — | W55 | — | 0.5 | OEM-X-77 | — | — | — |
| J3 | AIN 3 (0-5V) | — | W51 | — | 0.5 | OEM-X-41 | — | — | — |
| J4 | AIN 4 (0-5V) | — | W53 | — | 0.5 | OEM-X-13 | — | — | — |
| K1 | INJ 1 | — | W33 | — | 0.5 | OEM-X-33 | — | — | — |
| K2 | INJ 2 | — | W34 | — | 0.5 | OEM-X-32 | — | — | — |
| K3 | DIN/VR 1 | — | W56 | — | 0.5 | OEM-X-42 | — | — | — |
| K4 | DIN/VR 2 | — | — | — | — | — | — | — | — |
| L1 | INJ 8 | — | — | — | — | — | — | — | — |
| L2 | INJ 7 | — | — | — | — | — | — | — | — |
| L3 | INJ 6 | — | W38 | — | 0.5 | OEM-X-4 | — | — | — |
| L4 | Engine GND | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W35 | — | 0.5 | OEM-X-31 | — | — | — |
| M2 | INJ 4 | — | W36 | — | 0.5 | OEM-X-5 | — | — | — |
| M3 | INJ 5 | — | W37 | — | 0.5 | OEM-X-3 | — | — | — |
| 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) | — | — | — | — | — | — | — | — |
| A4 | DIN 7 (SWITCH) | — | — | — | — | — | — | — | — |
| B1 | WBO2 2 RCAL | — | — | — | — | — | — | — | — |
| B2 | WBO2 2 IP | — | — | — | — | — | — | — | — |
| B3 | WBO2 2 VS | — | — | — | — | — | — | — | — |
| B4 | WBO2 2 COM | — | — | — | — | — | — | — | — |
| C1 | WBO2 2 Shield | — | W40 | — | 0.5 | SP-SHD-1 | — | — | — |
| C2 | +5V SENSOR SUPPLY 2 | — | — | — | — | — | — | — | — |
| C3 | ANALOG IN 5 (0-5V) | — | — | — | — | — | — | — | — |
| C4 | GPO 19 (12V) | — | — | — | — | — | — | — | — |
| D1 | ANALOG IN 6 (0-5V) | — | — | — | — | — | — | — | — |
| D2 | ANALOG IN 7 (0-5V) | — | — | — | — | — | — | — | — |
| D3 | ANALOG IN 8 (0-5V) | — | — | — | — | — | — | — | — |
| 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 | — | 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 | — | W41 | — | 0.5 | OEM-X-56 | — | — | — |
| 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) | — | — | — | — | — | — | — | — |
| D4 | DIN 9 (switch) | — | — | — | — | — | — | — | — |
| 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 | — | W25 | — | 0.5 | OEM-X-70 | — | — | — |
| F3 | Knock 2 | — | W26 | — | 0.5 | OEM-X-69 | — | — | — |
| F4 | Sensor GND3 / knock ground | — | — | — | — | — | — | — | — |
| G1 | GPO 23 | — | — | — | — | — | — | — | — |
| G2 | GPO 24 | — | — | — | — | — | — | — | — |
| G3 | GPO 25 | — | — | — | — | — | — | — | — |
| G4 | GPO 26 | — | — | — | — | — | — | — | — |
| H1 | GPO 27 | — | — | — | — | — | — | — | — |
| H2 | GPO 28 | — | — | — | — | — | — | — | — |
| H3 | GPO 29 | — | — | — | — | — | — | — | — |
| H4 | GPO 30 | — | — | — | — | — | — | — | — |
OEM-X
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Fuel pump relay control | — | W42 | — | 0.5 | MAXXECUPRO-C1-B4 | — | — | — |
| 13 | O2 sensor signal | — | W53 | — | 0.5 | MAXXECUPRO-C1-J4 | — | — | — |
| 15 | Ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 16 | Crank position sensor (+) | — | W23 | — | 0.5 | MAXXECUPRO-C1-H3 | — | — | — |
| 17 | Camshaft position sensor (Hall) | — | W24 | — | 0.5 | MAXXECUPRO-C1-H4 | — | — | — |
| 2 | Idle speed control valve (close winding) | — | W45 | — | 0.5 | MAXXECUPRO-C1-D4 | — | — | — |
| 23 | Ignition coil cylinder 4 | — | W30 | — | 0.5 | MAXXECUPRO-C1-B3 | — | — | — |
| 24 | Ignition coil cylinder 6 | — | W32 | — | 0.5 | MAXXECUPRO-C1-C3 | — | — | — |
| 25 | Ignition coil cylinder 5 | — | W31 | — | 0.5 | MAXXECUPRO-C1-C2 | — | — | — |
| 26 | Battery voltage (constant +12V) | — | — | — | — | — | — | — | — |
| 27 | Main relay control | — | W43 | — | 0.5 | MAXXECUPRO-C1-C4 | — | — | — |
| 28 | Ground (electronics + sensor shielding) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 29 | Idle speed control valve (open winding) | — | W46 | — | 0.5 | MAXXECUPRO-C1-E4 | — | — | — |
| 3 | Injector cylinder 5 | — | W37 | — | 0.5 | MAXXECUPRO-C1-M3 | — | — | — |
| 31 | Injector cylinder 3 | — | W35 | — | 0.5 | MAXXECUPRO-C1-M1 | — | — | — |
| 32 | Injector cylinder 2 | — | W34 | — | 0.5 | MAXXECUPRO-C1-K2 | — | — | — |
| 33 | Injector cylinder 1 | — | W33 | — | 0.5 | MAXXECUPRO-C1-K1 | — | — | — |
| 34 | Ground (output stages) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 36 | Evap purge solenoid | — | W47 | — | 0.5 | MAXXECUPRO-C1-A1 | — | — | — |
| 38 | O2 sensor heater relay control | — | W44 | — | 0.5 | MAXXECUPRO-C1-D1 | — | — | — |
| 4 | Injector cylinder 6 | — | W38 | — | 0.5 | MAXXECUPRO-C1-L3 | — | — | — |
| 40 | O2 sensor signal ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 41 | Mass air flow (MAF) signal | — | W51 | — | 0.5 | MAXXECUPRO-C1-J3 | — | — | — |
| 42 | Vehicle speed signal | — | W56 | — | 0.5 | MAXXECUPRO-C1-K3 | — | — | — |
| 43 | Crank position sensor (-) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 44 | Sensor ground (IAT/ECT/TPS) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 45 | Shield ground | — | W39 | — | 0.5 | SP-SHD-1 | — | — | — |
| 47 | Tachometer output | — | W50 | — | 0.5 | MAXXECUPRO-C1-A4 | — | — | — |
| 5 | Injector cylinder 4 | — | W36 | — | 0.5 | MAXXECUPRO-C1-M2 | — | — | — |
| 50 | Ignition coil cylinder 1 | — | W27 | — | 0.5 | MAXXECUPRO-C1-A2 | — | — | — |
| 51 | Ignition coil cylinder 2 | — | W28 | — | 0.5 | MAXXECUPRO-C1-A3 | — | — | — |
| 52 | Ignition coil cylinder 3 | — | W29 | — | 0.5 | MAXXECUPRO-C1-B2 | — | — | — |
| 54 | ECU power (+14V from main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 55 | Ground (ignition) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 56 | Ignition switch (terminal 15) | — | W41 | — | 0.5 | MAXXECUPRO-C3-K3 | — | — | — |
| 59 | +5V sensor supply | — | W22 | — | 0.5 | MAXXECUPRO-C1-G1 | — | — | — |
| 6 | Ground (injector output stages) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 69 | Knock sensor cylinders 4-6 | — | W26 | — | 0.5 | MAXXECUPRO-C4-F3 | — | — | — |
| 7 | VANOS intake camshaft solenoid | — | W48 | — | 0.5 | MAXXECUPRO-C1-B1 | — | — | — |
| 70 | Knock sensor cylinders 1-3 | — | W25 | — | 0.5 | MAXXECUPRO-C4-F2 | — | — | — |
| 71 | Knock sensor ground/shield | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 73 | Throttle position (TPS) | — | W52 | — | 0.5 | MAXXECUPRO-C1-G2 | — | — | — |
| 77 | Intake air temperature (IAT) | — | W55 | — | 0.5 | MAXXECUPRO-C1-J2 | — | — | — |
| 78 | Engine coolant temperature (ECT) | — | W54 | — | 0.5 | MAXXECUPRO-C1-J1 | — | — | — |
| 8 | Check engine light (MIL) | — | W49 | — | 0.5 | MAXXECUPRO-C1-C1 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | OEM-X-28 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-X-40 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-X-43 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-X-44 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-X-71 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | MAXXECUPRO-C1-H1 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | MAXXECUPRO-C1-H2 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | MAXXECUPRO-C3-J2 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | MAXXECUPRO-C3-J3 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-X-54 | — | — | — |
| 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-X-15 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-X-34 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-X-55 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-X-6 | — | — | — |
| 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 | — | — | — |
SP-SHD
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W39 | — | 0.5 | OEM-X-45 | — | — | — |
| 1 | — | — | W40 | — | 0.5 | MAXXECUPRO-C3-C1 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-X-1 | Fuel pump relay control | low_side_out | MAXXECUPRO-C1-B4 | GPO 1 | low_side_out | corroborated | |
| OEM-X-13 | O2 sensor signal | lambda_nb_in | MAXXECUPRO-C1-J4 | AIN 4 (0-5V) | analog_in | corroborated | |
| OEM-X-15 | 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-X-16 | Crank position sensor (+) | trigger_in | MAXXECUPRO-C1-H3 | TRIGGER | trigger_in | corroborated | |
| OEM-X-17 | Camshaft position sensor (Hall) | trigger_in | MAXXECUPRO-C1-H4 | HOME | trigger_in | corroborated | |
| OEM-X-2 | Idle speed control valve (close winding) | low_side_out | MAXXECUPRO-C1-D4 | GPO 3 | low_side_out | corroborated | |
| OEM-X-23 | Ignition coil cylinder 4 | ignition_out | MAXXECUPRO-C1-B3 | IGN 4 | ignition_out | corroborated | |
| OEM-X-24 | Ignition coil cylinder 6 | ignition_out | MAXXECUPRO-C1-C3 | IGN 6 | ignition_out | corroborated | |
| OEM-X-25 | Ignition coil cylinder 5 | ignition_out | MAXXECUPRO-C1-C2 | IGN 5 | ignition_out | corroborated | |
| OEM-X-26 | Battery voltage (constant +12V) | power_in | — | — | — | corroborated | |
| OEM-X-27 | Main relay control | low_side_out | MAXXECUPRO-C1-C4 | GPO 2 | low_side_out | corroborated | |
| OEM-X-28 | Ground (electronics + sensor shielding) | 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-X-29 | Idle speed control valve (open winding) | low_side_out | MAXXECUPRO-C1-E4 | GPO 4 | low_side_out | corroborated | |
| OEM-X-3 | Injector cylinder 5 | injector_out | MAXXECUPRO-C1-M3 | INJ 5 | injector_out | corroborated | |
| OEM-X-31 | Injector cylinder 3 | injector_out | MAXXECUPRO-C1-M1 | INJ 3 | injector_out | corroborated | |
| OEM-X-32 | Injector cylinder 2 | injector_out | MAXXECUPRO-C1-K2 | INJ 2 | injector_out | corroborated | |
| OEM-X-33 | Injector cylinder 1 | injector_out | MAXXECUPRO-C1-K1 | INJ 1 | injector_out | corroborated | |
| OEM-X-34 | Ground (output stages) | 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-X-36 | Evap purge solenoid | low_side_out | MAXXECUPRO-C1-A1 | GPO 5 | low_side_out | corroborated | |
| OEM-X-38 | O2 sensor heater relay control | low_side_out | MAXXECUPRO-C1-D1 | WBO2 Heater- | low_side_out | corroborated | |
| OEM-X-4 | Injector cylinder 6 | injector_out | MAXXECUPRO-C1-L3 | INJ 6 | injector_out | corroborated | |
| OEM-X-40 | O2 sensor 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 | corroborated | |
| OEM-X-41 | Mass air flow (MAF) signal | analog_in | MAXXECUPRO-C1-J3 | AIN 3 (0-5V) | analog_in | corroborated | |
| OEM-X-42 | Vehicle speed signal | digital_in | MAXXECUPRO-C1-K3 | DIN/VR 1 | digital_in | corroborated | |
| OEM-X-43 | Crank position 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-X-44 | Sensor ground (IAT/ECT/TPS) | 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-X-45 | Shield ground | shield | MAXXECUPRO-C3-C1 | WBO2 2 Shield | shield | corroborated | |
| OEM-X-47 | Tachometer output | tacho_out | MAXXECUPRO-C1-A4 | GPO 8/TACHO | low_side_out | corroborated | |
| OEM-X-5 | Injector cylinder 4 | injector_out | MAXXECUPRO-C1-M2 | INJ 4 | injector_out | corroborated | |
| OEM-X-50 | Ignition coil cylinder 1 | ignition_out | MAXXECUPRO-C1-A2 | IGN 1 | ignition_out | corroborated | |
| OEM-X-51 | Ignition coil cylinder 2 | ignition_out | MAXXECUPRO-C1-A3 | IGN 2 | ignition_out | corroborated | |
| OEM-X-52 | Ignition coil cylinder 3 | ignition_out | MAXXECUPRO-C1-B2 | IGN 3 | ignition_out | corroborated | |
| OEM-X-54 | ECU power (+14V from main relay) | power_in | MAXXECUPRO-C1-M4 + MAXXECUPRO-C3-M4 | +12V ECU power supply + 12V ECU 2 | power_in | corroborated | |
| OEM-X-55 | Ground (ignition) | 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-X-56 | Ignition switch (terminal 15) | digital_in | MAXXECUPRO-C3-K3 | KEY IN 12V | digital_in | corroborated | |
| OEM-X-59 | +5V sensor supply | vref | MAXXECUPRO-C1-G1 | +5V sensor supply | vref | corroborated | |
| OEM-X-6 | Ground (injector output stages) | 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-X-69 | Knock sensor cylinders 4-6 | knock_in | MAXXECUPRO-C4-F3 | Knock 2 | knock_in | corroborated | |
| OEM-X-7 | VANOS intake camshaft solenoid | low_side_out | MAXXECUPRO-C1-B1 | GPO 6 | low_side_out | corroborated | |
| OEM-X-70 | Knock sensor cylinders 1-3 | knock_in | MAXXECUPRO-C4-F2 | Knock 1 | knock_in | corroborated | |
| OEM-X-71 | Knock sensor ground/shield | 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-X-73 | Throttle position (TPS) | analog_in | MAXXECUPRO-C1-G2 | TPS/AIN | analog_in | corroborated | |
| OEM-X-77 | Intake air temperature (IAT) | temp_in | MAXXECUPRO-C1-J2 | AIN 2 (temperature) | temp_in | corroborated | |
| OEM-X-78 | Engine coolant temperature (ECT) | temp_in | MAXXECUPRO-C1-J1 | AIN 1 (temperature) | temp_in | corroborated | |
| OEM-X-8 | Check engine light (MIL) | low_side_out | MAXXECUPRO-C1-C1 | GPO 7 | low_side_out | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-X-54 | SP-14V-1 | 0.85 | no route | ECU power (+14V from 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-X-15 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W5 | OEM-X-34 | SP-GND-1 | 0.85 | no route | Ground (output stages) | — | |
| W6 | OEM-X-55 | SP-GND-1 | 0.85 | no route | Ground (ignition) | — | |
| W7 | OEM-X-6 | SP-GND-1 | 0.85 | no route | Ground (injector output stages) | — | |
| 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-X-28 | SP-0V-1 | 0.5 | no route | Ground (electronics + sensor shielding) | — | |
| W14 | OEM-X-40 | SP-0V-1 | 0.5 | no route | O2 sensor signal ground | — | |
| W15 | OEM-X-43 | SP-0V-1 | 0.5 | no route | Crank position sensor (-) | — | |
| W16 | OEM-X-44 | SP-0V-1 | 0.5 | no route | Sensor ground (IAT/ECT/TPS) | — | |
| W17 | OEM-X-71 | SP-0V-1 | 0.5 | no route | Knock sensor ground/shield | — | |
| 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-X-59 | MAXXECUPRO-C1-G1 | 0.5 | no route | +5V sensor supply | — | |
| W23 | OEM-X-16 | MAXXECUPRO-C1-H3 | 0.5 | no route | Crank position sensor (+) | — | |
| W24 | OEM-X-17 | MAXXECUPRO-C1-H4 | 0.5 | no route | Camshaft position sensor (Hall) | — | |
| W25 | OEM-X-70 | MAXXECUPRO-C4-F2 | 0.5 | no route | Knock sensor cylinders 1-3 | — | |
| W26 | OEM-X-69 | MAXXECUPRO-C4-F3 | 0.5 | no route | Knock sensor cylinders 4-6 | — | |
| W27 | OEM-X-50 | MAXXECUPRO-C1-A2 | 0.5 | no route | Ignition coil cylinder 1 | — | |
| W28 | OEM-X-51 | MAXXECUPRO-C1-A3 | 0.5 | no route | Ignition coil cylinder 2 | — | |
| W29 | OEM-X-52 | MAXXECUPRO-C1-B2 | 0.5 | no route | Ignition coil cylinder 3 | — | |
| W30 | OEM-X-23 | MAXXECUPRO-C1-B3 | 0.5 | no route | Ignition coil cylinder 4 | — | |
| W31 | OEM-X-25 | MAXXECUPRO-C1-C2 | 0.5 | no route | Ignition coil cylinder 5 | — | |
| W32 | OEM-X-24 | MAXXECUPRO-C1-C3 | 0.5 | no route | Ignition coil cylinder 6 | — | |
| W33 | OEM-X-33 | MAXXECUPRO-C1-K1 | 0.5 | no route | Injector cylinder 1 | — | |
| W34 | OEM-X-32 | MAXXECUPRO-C1-K2 | 0.5 | no route | Injector cylinder 2 | — | |
| W35 | OEM-X-31 | MAXXECUPRO-C1-M1 | 0.5 | no route | Injector cylinder 3 | — | |
| W36 | OEM-X-5 | MAXXECUPRO-C1-M2 | 0.5 | no route | Injector cylinder 4 | — | |
| W37 | OEM-X-3 | MAXXECUPRO-C1-M3 | 0.5 | no route | Injector cylinder 5 | — | |
| W38 | OEM-X-4 | MAXXECUPRO-C1-L3 | 0.5 | no route | Injector cylinder 6 | — | |
| W39 | OEM-X-45 | SP-SHD-1 | 0.5 | no route | Shield ground | — | |
| W40 | SP-SHD-1 | MAXXECUPRO-C3-C1 | 0.5 | no route | WBO2 2 Shield | — | |
| W41 | OEM-X-56 | MAXXECUPRO-C3-K3 | 0.5 | no route | Ignition switch (terminal 15) | — | |
| W42 | OEM-X-1 | MAXXECUPRO-C1-B4 | 0.5 | no route | Fuel pump relay control | — | |
| W43 | OEM-X-27 | MAXXECUPRO-C1-C4 | 0.5 | no route | Main relay control | — | |
| W44 | OEM-X-38 | MAXXECUPRO-C1-D1 | 0.5 | no route | O2 sensor heater relay control | — | |
| W45 | OEM-X-2 | MAXXECUPRO-C1-D4 | 0.5 | no route | Idle speed control valve (close winding) | — | |
| W46 | OEM-X-29 | MAXXECUPRO-C1-E4 | 0.5 | no route | Idle speed control valve (open winding) | — | |
| W47 | OEM-X-36 | MAXXECUPRO-C1-A1 | 0.5 | no route | Evap purge solenoid | — | |
| W48 | OEM-X-7 | MAXXECUPRO-C1-B1 | 0.5 | no route | VANOS intake camshaft solenoid | — | |
| W49 | OEM-X-8 | MAXXECUPRO-C1-C1 | 0.5 | no route | Check engine light (MIL) | — | |
| W50 | OEM-X-47 | MAXXECUPRO-C1-A4 | 0.5 | no route | Tachometer output | — | |
| W51 | OEM-X-41 | MAXXECUPRO-C1-J3 | 0.5 | no route | Mass air flow (MAF) signal | — | |
| W52 | OEM-X-73 | MAXXECUPRO-C1-G2 | 0.5 | no route | Throttle position (TPS) | — | |
| W53 | OEM-X-13 | MAXXECUPRO-C1-J4 | 0.5 | no route | O2 sensor signal | — | |
| W54 | OEM-X-78 | MAXXECUPRO-C1-J1 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W55 | OEM-X-77 | MAXXECUPRO-C1-J2 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W56 | OEM-X-42 | MAXXECUPRO-C1-K3 | 0.5 | no route | Vehicle speed signal | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | BMW-E36-DME-CONN | BMW | E36 DME (M3.1/M3.3.1) harness connector | 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 (1)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | OEM-X-47 ↔ MAXXECUPRO-C1-A4 | OEM-X-47 "Tachometer output" [tacho_out] is wired to MAXXECUPRO-C1-A4 "GPO 8/TACHO" [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-X-26 | 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-X 26: Battery voltage (constant +12V): MaxxECU MaxxECU PRO has no battery-constant input; not needed
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Link BMWLink E36X (G4X) plug-in install manual | https://linkecu.com/documentation/E36X.pdf | archive | 2026-10-05 | 010cda3acd08 |
| 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 | community_copy | bimmer-service: Bosch Motronic M3.3.1 pinout (E36 M50) | https://www.bimmer-service.com/2025/11/17/bosch-motronic-m3-3-1-pinout-wiring-diagram/ | — | — | — |