BMW 3 Series E36 1990–2000 (M50/M52) → MoTeC M170 13170 (auto)
BMW 3 Series E36 1990–2000 (M50/M52) — MoTeC — M170
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 | 52 wires · 5 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 | M170-A-23 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | M170-A-32 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | M170-A-41 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-X-26 | M170-A-54 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-X-15 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-X-34 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-X-55 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-X-6 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | M170-A-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | M170-A-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | M170-A-19 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | M170-A-20 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-GND-1 | M170-A-21 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-X-28 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-X-40 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-X-43 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-X-44 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-X-71 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | M170-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | M170-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-X-59 | M170-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-X-16 | M170-A-49 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-X-17 | M170-A-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-X-70 | M170-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-X-69 | M170-A-60 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-X-50 | M170-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-X-51 | M170-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-X-52 | M170-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-X-23 | M170-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-X-25 | M170-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-X-24 | M170-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-X-33 | M170-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-X-32 | M170-A-43 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-X-31 | M170-A-50 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-X-5 | M170-A-51 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-X-3 | M170-A-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-X-4 | M170-A-66 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-X-1 | M170-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-X-27 | M170-A-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-X-38 | M170-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-X-2 | M170-A-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-X-29 | M170-A-62 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-X-36 | M170-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-X-7 | M170-A-59 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-X-8 | M170-A-65 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-X-41 | M170-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-X-73 | M170-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-X-13 | M170-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-X-78 | M170-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-X-77 | M170-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-X-42 | M170-A-46 | 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 | M170-A-54 | M170-A-11 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | M170-A-11 | M170-A-16 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | M170-A-11 | M170-A-23 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | M170-A-14 | M170-A-16 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | M170-A-14 | M170-A-23 | open (OL) | power ground must not touch +12 V supply | |
| 6 | M170-A-14 | M170-A-54 | open (OL) | power ground must not touch +12 V supply | |
| 7 | M170-A-23 | M170-A-16 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | M170-A-54 | M170-A-16 | open (OL) | +12 V supply must not touch 5 V sensor reference |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
M170-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Low Side Ignition 1 | — | W27 | — | 0.5 | OEM-X-50 | — | — | — |
| 10 | Low Side Ignition 4 | — | W30 | — | 0.5 | OEM-X-23 | — | — | — |
| 11 | Sensor 0V A | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Analogue Voltage Input 5 | — | — | — | — | — | — | — | — |
| 13 | Universal Digital Input 7 | — | — | — | — | — | — | — | — |
| 14 | Battery Negative 1 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Battery Negative 2 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 16 | Sensor 5.0V A | — | W22 | — | 0.5 | OEM-X-59 | — | — | — |
| 17 | Low Side Ignition 5 | — | W31 | — | 0.5 | OEM-X-25 | — | — | — |
| 18 | Analogue Voltage Input 2 | — | W48 | — | 0.5 | OEM-X-73 | — | — | — |
| 19 | Battery Negative 3 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Low Side Ignition 8 | — | — | — | — | — | — | — | — |
| 20 | Battery Negative 4 | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Battery Negative 5 | — | W14 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Universal Digital Input 8 | — | — | — | — | — | — | — | — |
| 23 | Battery Positive | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Peak Hold Injector 5 | — | W39 | — | 0.5 | OEM-X-1 | — | — | — |
| 25 | Low Side Ignition 6 | — | W32 | — | 0.5 | OEM-X-24 | — | — | — |
| 26 | Analogue Voltage Input 1 | — | W47 | — | 0.5 | OEM-X-41 | — | — | — |
| 27 | Sensor 0V B | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Analogue Temperature Input 1 | — | W50 | — | 0.5 | OEM-X-78 | — | — | — |
| 29 | Knock Input 1 | — | W25 | — | 0.5 | OEM-X-70 | — | — | — |
| 3 | Low Side Ignition 7 | — | — | — | — | — | — | — | — |
| 30 | Analogue Temperature Input 3 | — | — | — | — | — | — | — | — |
| 31 | CAN Bus 1 Low | — | — | — | — | — | — | — | — |
| 32 | Battery Positive | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 33 | Peak Hold Injector 1 | — | W33 | — | 0.5 | OEM-X-33 | — | — | — |
| 34 | Sensor 5.0V B | — | — | — | — | — | — | — | — |
| 35 | Analogue Voltage Input 7 | — | — | — | — | — | — | — | — |
| 36 | Analogue Voltage Input 6 | — | — | — | — | — | — | — | — |
| 37 | Sensor 6.3V | — | — | — | — | — | — | — | — |
| 38 | Analogue Temperature Input 2 | — | W51 | — | 0.5 | OEM-X-77 | — | — | — |
| 39 | Analogue Temperature Input 4 | — | — | — | — | — | — | — | — |
| 4 | Low Side Ignition 3 | — | W29 | — | 0.5 | OEM-X-52 | — | — | — |
| 40 | CAN Bus 1 High | — | — | — | — | — | — | — | — |
| 41 | Battery Positive | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 42 | Peak Hold Injector 6 | — | W40 | — | 0.5 | OEM-X-27 | — | — | — |
| 43 | Low Side Injector 1 | — | W34 | — | 0.5 | OEM-X-32 | — | — | — |
| 44 | Analogue Voltage Input 8 | — | — | — | — | — | — | — | — |
| 45 | Universal Digital Input 4 | — | — | — | — | — | — | — | — |
| 46 | Universal Digital Input 3 | — | W52 | — | 0.5 | OEM-X-42 | — | — | — |
| 47 | Ethernet Transmit - | — | — | — | — | — | — | — | — |
| 48 | Ethernet Transmit + | — | — | — | — | — | — | — | — |
| 49 | Universal Digital Input 1 | — | W23 | — | 0.5 | OEM-X-16 | — | — | — |
| 5 | Low Side Ignition 2 | — | W28 | — | 0.5 | OEM-X-51 | — | — | — |
| 50 | Peak Hold Injector 2 | — | W35 | — | 0.5 | OEM-X-31 | — | — | — |
| 51 | Low Side Injector 2 | — | W36 | — | 0.5 | OEM-X-5 | — | — | — |
| 52 | Universal Digital Input 5 | — | — | — | — | — | — | — | — |
| 53 | Universal Digital Input 6 | — | — | — | — | — | — | — | — |
| 54 | Battery Backup | — | W5 | — | 0.85 | OEM-X-26 | — | — | — |
| 55 | Ethernet Receive + | — | — | — | — | — | — | — | — |
| 56 | Universal Digital Input 2 | — | W24 | — | 0.5 | OEM-X-17 | — | — | — |
| 57 | Peak Hold Injector 7 | — | W42 | — | 0.5 | OEM-X-2 | — | — | — |
| 58 | Half Bridge Output 5 | — | — | — | — | — | — | — | — |
| 59 | Half Bridge Output 3 | — | W45 | — | 0.5 | OEM-X-7 | — | — | — |
| 6 | Analogue Voltage Input 3 | — | W49 | — | 0.5 | OEM-X-13 | — | — | — |
| 60 | Knock Input 2 | — | W26 | — | 0.5 | OEM-X-69 | — | — | — |
| 61 | Ethernet Receive - | — | — | — | — | — | — | — | — |
| 62 | Peak Hold Injector 8 | — | W43 | — | 0.5 | OEM-X-29 | — | — | — |
| 63 | Peak Hold Injector 3 | — | W37 | — | 0.5 | OEM-X-3 | — | — | — |
| 64 | Half Bridge Output 6 | — | — | — | — | — | — | — | — |
| 65 | Half Bridge Output 4 | — | W46 | — | 0.5 | OEM-X-8 | — | — | — |
| 66 | Peak Hold Injector 4 | — | W38 | — | 0.5 | OEM-X-4 | — | — | — |
| 7 | Analogue Voltage Input 4 | — | — | — | — | — | — | — | — |
| 8 | Half Bridge Output 2 | — | W44 | — | 0.5 | OEM-X-36 | — | — | — |
| 9 | Half Bridge Output 1 | — | W41 | — | 0.5 | OEM-X-38 | — | — | — |
OEM-X
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Fuel pump relay control | — | W39 | — | 0.5 | M170-A-24 | — | — | — |
| 13 | O2 sensor signal | — | W49 | — | 0.5 | M170-A-6 | — | — | — |
| 15 | Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 16 | Crank position sensor (+) | — | W23 | — | 0.5 | M170-A-49 | — | — | — |
| 17 | Camshaft position sensor (Hall) | — | W24 | — | 0.5 | M170-A-56 | — | — | — |
| 2 | Idle speed control valve (close winding) | — | W42 | — | 0.5 | M170-A-57 | — | — | — |
| 23 | Ignition coil cylinder 4 | — | W30 | — | 0.5 | M170-A-10 | — | — | — |
| 24 | Ignition coil cylinder 6 | — | W32 | — | 0.5 | M170-A-25 | — | — | — |
| 25 | Ignition coil cylinder 5 | — | W31 | — | 0.5 | M170-A-17 | — | — | — |
| 26 | Battery voltage (constant +12V) | — | W5 | — | 0.85 | M170-A-54 | — | — | — |
| 27 | Main relay control | — | W40 | — | 0.5 | M170-A-42 | — | — | — |
| 28 | Ground (electronics + sensor shielding) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 29 | Idle speed control valve (open winding) | — | W43 | — | 0.5 | M170-A-62 | — | — | — |
| 3 | Injector cylinder 5 | — | W37 | — | 0.5 | M170-A-63 | — | — | — |
| 31 | Injector cylinder 3 | — | W35 | — | 0.5 | M170-A-50 | — | — | — |
| 32 | Injector cylinder 2 | — | W34 | — | 0.5 | M170-A-43 | — | — | — |
| 33 | Injector cylinder 1 | — | W33 | — | 0.5 | M170-A-33 | — | — | — |
| 34 | Ground (output stages) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 36 | Evap purge solenoid | — | W44 | — | 0.5 | M170-A-8 | — | — | — |
| 38 | O2 sensor heater relay control | — | W41 | — | 0.5 | M170-A-9 | — | — | — |
| 4 | Injector cylinder 6 | — | W38 | — | 0.5 | M170-A-66 | — | — | — |
| 40 | O2 sensor signal ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 41 | Mass air flow (MAF) signal | — | W47 | — | 0.5 | M170-A-26 | — | — | — |
| 42 | Vehicle speed signal | — | W52 | — | 0.5 | M170-A-46 | — | — | — |
| 43 | Crank position sensor (-) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 44 | Sensor ground (IAT/ECT/TPS) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 45 | Shield ground | — | — | — | — | — | — | — | — |
| 47 | Tachometer output | — | — | — | — | — | — | — | — |
| 5 | Injector cylinder 4 | — | W36 | — | 0.5 | M170-A-51 | — | — | — |
| 50 | Ignition coil cylinder 1 | — | W27 | — | 0.5 | M170-A-1 | — | — | — |
| 51 | Ignition coil cylinder 2 | — | W28 | — | 0.5 | M170-A-5 | — | — | — |
| 52 | Ignition coil cylinder 3 | — | W29 | — | 0.5 | M170-A-4 | — | — | — |
| 54 | ECU power (+14V from main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 55 | Ground (ignition) | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 56 | Ignition switch (terminal 15) | — | — | — | — | — | — | — | — |
| 59 | +5V sensor supply | — | W22 | — | 0.5 | M170-A-16 | — | — | — |
| 6 | Ground (injector output stages) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 69 | Knock sensor cylinders 4-6 | — | W26 | — | 0.5 | M170-A-60 | — | — | — |
| 7 | VANOS intake camshaft solenoid | — | W45 | — | 0.5 | M170-A-59 | — | — | — |
| 70 | Knock sensor cylinders 1-3 | — | W25 | — | 0.5 | M170-A-29 | — | — | — |
| 71 | Knock sensor ground/shield | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 73 | Throttle position (TPS) | — | W48 | — | 0.5 | M170-A-18 | — | — | — |
| 77 | Intake air temperature (IAT) | — | W51 | — | 0.5 | M170-A-38 | — | — | — |
| 78 | Engine coolant temperature (ECT) | — | W50 | — | 0.5 | M170-A-28 | — | — | — |
| 8 | Check engine light (MIL) | — | W46 | — | 0.5 | M170-A-65 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-X-28 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-X-40 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-X-43 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-X-44 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-X-71 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | M170-A-11 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | M170-A-27 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-X-54 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | M170-A-23 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | M170-A-32 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | M170-A-41 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-X-15 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-X-34 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-X-55 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-X-6 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | M170-A-14 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | M170-A-15 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | M170-A-19 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | M170-A-20 | — | — | — |
| 1 | — | — | W14 | — | 0.85 | M170-A-21 | — | — | — |
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 | M170-A-24 | Peak Hold Injector 5 | injector_out | corroborated | |
| OEM-X-13 | O2 sensor signal | lambda_nb_in | M170-A-6 | Analogue Voltage Input 3 | analog_in | corroborated | |
| OEM-X-15 | Ground | ground | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | ground | corroborated | |
| OEM-X-16 | Crank position sensor (+) | trigger_in | M170-A-49 | Universal Digital Input 1 | digital_in | corroborated | |
| OEM-X-17 | Camshaft position sensor (Hall) | trigger_in | M170-A-56 | Universal Digital Input 2 | digital_in | corroborated | |
| OEM-X-2 | Idle speed control valve (close winding) | low_side_out | M170-A-57 | Peak Hold Injector 7 | injector_out | corroborated | |
| OEM-X-23 | Ignition coil cylinder 4 | ignition_out | M170-A-10 | Low Side Ignition 4 | ignition_out | corroborated | |
| OEM-X-24 | Ignition coil cylinder 6 | ignition_out | M170-A-25 | Low Side Ignition 6 | ignition_out | corroborated | |
| OEM-X-25 | Ignition coil cylinder 5 | ignition_out | M170-A-17 | Low Side Ignition 5 | ignition_out | corroborated | |
| OEM-X-26 | Battery voltage (constant +12V) | power_in | M170-A-54 | Battery Backup | power_in | corroborated | |
| OEM-X-27 | Main relay control | low_side_out | M170-A-42 | Peak Hold Injector 6 | injector_out | corroborated | |
| OEM-X-28 | Ground (electronics + sensor shielding) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-X-29 | Idle speed control valve (open winding) | low_side_out | M170-A-62 | Peak Hold Injector 8 | injector_out | corroborated | |
| OEM-X-3 | Injector cylinder 5 | injector_out | M170-A-63 | Peak Hold Injector 3 | injector_out | corroborated | |
| OEM-X-31 | Injector cylinder 3 | injector_out | M170-A-50 | Peak Hold Injector 2 | injector_out | corroborated | |
| OEM-X-32 | Injector cylinder 2 | injector_out | M170-A-43 | Low Side Injector 1 | injector_out | corroborated | |
| OEM-X-33 | Injector cylinder 1 | injector_out | M170-A-33 | Peak Hold Injector 1 | injector_out | corroborated | |
| OEM-X-34 | Ground (output stages) | ground | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | ground | corroborated | |
| OEM-X-36 | Evap purge solenoid | low_side_out | M170-A-8 | Half Bridge Output 2 | hbridge_out | corroborated | |
| OEM-X-38 | O2 sensor heater relay control | low_side_out | M170-A-9 | Half Bridge Output 1 | hbridge_out | corroborated | |
| OEM-X-4 | Injector cylinder 6 | injector_out | M170-A-66 | Peak Hold Injector 4 | injector_out | corroborated | |
| OEM-X-40 | O2 sensor signal ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-X-41 | Mass air flow (MAF) signal | analog_in | M170-A-26 | Analogue Voltage Input 1 | analog_in | corroborated | |
| OEM-X-42 | Vehicle speed signal | digital_in | M170-A-46 | Universal Digital Input 3 | digital_in | corroborated | |
| OEM-X-43 | Crank position sensor (-) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-X-44 | Sensor ground (IAT/ECT/TPS) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-X-45 | Shield ground | shield | — | — | — | corroborated | |
| OEM-X-47 | Tachometer output | tacho_out | — | — | — | corroborated | |
| OEM-X-5 | Injector cylinder 4 | injector_out | M170-A-51 | Low Side Injector 2 | injector_out | corroborated | |
| OEM-X-50 | Ignition coil cylinder 1 | ignition_out | M170-A-1 | Low Side Ignition 1 | ignition_out | corroborated | |
| OEM-X-51 | Ignition coil cylinder 2 | ignition_out | M170-A-5 | Low Side Ignition 2 | ignition_out | corroborated | |
| OEM-X-52 | Ignition coil cylinder 3 | ignition_out | M170-A-4 | Low Side Ignition 3 | ignition_out | corroborated | |
| OEM-X-54 | ECU power (+14V from main relay) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | corroborated | |
| OEM-X-55 | Ground (ignition) | ground | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | ground | corroborated | |
| OEM-X-56 | Ignition switch (terminal 15) | digital_in | — | — | — | corroborated | |
| OEM-X-59 | +5V sensor supply | vref | M170-A-16 | Sensor 5.0V A | vref | corroborated | |
| OEM-X-6 | Ground (injector output stages) | ground | M170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 | Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 | ground | corroborated | |
| OEM-X-69 | Knock sensor cylinders 4-6 | knock_in | M170-A-60 | Knock Input 2 | knock_in | corroborated | |
| OEM-X-7 | VANOS intake camshaft solenoid | low_side_out | M170-A-59 | Half Bridge Output 3 | hbridge_out | corroborated | |
| OEM-X-70 | Knock sensor cylinders 1-3 | knock_in | M170-A-29 | Knock Input 1 | knock_in | corroborated | |
| OEM-X-71 | Knock sensor ground/shield | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-X-73 | Throttle position (TPS) | analog_in | M170-A-18 | Analogue Voltage Input 2 | analog_in | corroborated | |
| OEM-X-77 | Intake air temperature (IAT) | temp_in | M170-A-38 | Analogue Temperature Input 2 | temp_in | corroborated | |
| OEM-X-78 | Engine coolant temperature (ECT) | temp_in | M170-A-28 | Analogue Temperature Input 1 | temp_in | corroborated | |
| OEM-X-8 | Check engine light (MIL) | low_side_out | M170-A-65 | Half Bridge Output 4 | hbridge_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 | M170-A-23 | 0.85 | no route | Battery Positive | — | |
| W3 | SP-14V-1 | M170-A-32 | 0.85 | no route | Battery Positive | — | |
| W4 | SP-14V-1 | M170-A-41 | 0.85 | no route | Battery Positive | — | |
| W5 | OEM-X-26 | M170-A-54 | 0.85 | no route | Battery voltage (constant +12V) | — | |
| W6 | OEM-X-15 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W7 | OEM-X-34 | SP-GND-1 | 0.85 | no route | Ground (output stages) | — | |
| W8 | OEM-X-55 | SP-GND-1 | 0.85 | no route | Ground (ignition) | — | |
| W9 | OEM-X-6 | SP-GND-1 | 0.85 | no route | Ground (injector output stages) | — | |
| W10 | SP-GND-1 | M170-A-14 | 0.85 | no route | Battery Negative 1 | — | |
| W11 | SP-GND-1 | M170-A-15 | 0.85 | no route | Battery Negative 2 | — | |
| W12 | SP-GND-1 | M170-A-19 | 0.85 | no route | Battery Negative 3 | — | |
| W13 | SP-GND-1 | M170-A-20 | 0.85 | no route | Battery Negative 4 | — | |
| W14 | SP-GND-1 | M170-A-21 | 0.85 | no route | Battery Negative 5 | — | |
| W15 | OEM-X-28 | SP-0V-1 | 0.5 | no route | Ground (electronics + sensor shielding) | — | |
| W16 | OEM-X-40 | SP-0V-1 | 0.5 | no route | O2 sensor signal ground | — | |
| W17 | OEM-X-43 | SP-0V-1 | 0.5 | no route | Crank position sensor (-) | — | |
| W18 | OEM-X-44 | SP-0V-1 | 0.5 | no route | Sensor ground (IAT/ECT/TPS) | — | |
| W19 | OEM-X-71 | SP-0V-1 | 0.5 | no route | Knock sensor ground/shield | — | |
| W20 | SP-0V-1 | M170-A-11 | 0.5 | no route | Sensor 0V A | — | |
| W21 | SP-0V-1 | M170-A-27 | 0.5 | no route | Sensor 0V B | — | |
| W22 | OEM-X-59 | M170-A-16 | 0.5 | no route | +5V sensor supply | — | |
| W23 | OEM-X-16 | M170-A-49 | 0.5 | no route | Crank position sensor (+) | — | |
| W24 | OEM-X-17 | M170-A-56 | 0.5 | no route | Camshaft position sensor (Hall) | — | |
| W25 | OEM-X-70 | M170-A-29 | 0.5 | no route | Knock sensor cylinders 1-3 | — | |
| W26 | OEM-X-69 | M170-A-60 | 0.5 | no route | Knock sensor cylinders 4-6 | — | |
| W27 | OEM-X-50 | M170-A-1 | 0.5 | no route | Ignition coil cylinder 1 | — | |
| W28 | OEM-X-51 | M170-A-5 | 0.5 | no route | Ignition coil cylinder 2 | — | |
| W29 | OEM-X-52 | M170-A-4 | 0.5 | no route | Ignition coil cylinder 3 | — | |
| W30 | OEM-X-23 | M170-A-10 | 0.5 | no route | Ignition coil cylinder 4 | — | |
| W31 | OEM-X-25 | M170-A-17 | 0.5 | no route | Ignition coil cylinder 5 | — | |
| W32 | OEM-X-24 | M170-A-25 | 0.5 | no route | Ignition coil cylinder 6 | — | |
| W33 | OEM-X-33 | M170-A-33 | 0.5 | no route | Injector cylinder 1 | — | |
| W34 | OEM-X-32 | M170-A-43 | 0.5 | no route | Injector cylinder 2 | — | |
| W35 | OEM-X-31 | M170-A-50 | 0.5 | no route | Injector cylinder 3 | — | |
| W36 | OEM-X-5 | M170-A-51 | 0.5 | no route | Injector cylinder 4 | — | |
| W37 | OEM-X-3 | M170-A-63 | 0.5 | no route | Injector cylinder 5 | — | |
| W38 | OEM-X-4 | M170-A-66 | 0.5 | no route | Injector cylinder 6 | — | |
| W39 | OEM-X-1 | M170-A-24 | 0.5 | no route | Fuel pump relay control | — | |
| W40 | OEM-X-27 | M170-A-42 | 0.5 | no route | Main relay control | — | |
| W41 | OEM-X-38 | M170-A-9 | 0.5 | no route | O2 sensor heater relay control | — | |
| W42 | OEM-X-2 | M170-A-57 | 0.5 | no route | Idle speed control valve (close winding) | — | |
| W43 | OEM-X-29 | M170-A-62 | 0.5 | no route | Idle speed control valve (open winding) | — | |
| W44 | OEM-X-36 | M170-A-8 | 0.5 | no route | Evap purge solenoid | — | |
| W45 | OEM-X-7 | M170-A-59 | 0.5 | no route | VANOS intake camshaft solenoid | — | |
| W46 | OEM-X-8 | M170-A-65 | 0.5 | no route | Check engine light (MIL) | — | |
| W47 | OEM-X-41 | M170-A-26 | 0.5 | no route | Mass air flow (MAF) signal | — | |
| W48 | OEM-X-73 | M170-A-18 | 0.5 | no route | Throttle position (TPS) | — | |
| W49 | OEM-X-13 | M170-A-6 | 0.5 | no route | O2 sensor signal | — | |
| W50 | OEM-X-78 | M170-A-28 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W51 | OEM-X-77 | M170-A-38 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W52 | OEM-X-42 | M170-A-46 | 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 (11)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-X-16 ↔ M170-A-49 | OEM-X-16 "Crank position sensor (+)" [trigger_in] is wired to M170-A-49 "Universal Digital Input 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-X-17 ↔ M170-A-56 | OEM-X-17 "Camshaft position sensor (Hall)" [trigger_in] is wired to M170-A-56 "Universal Digital Input 2" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-X-36 ↔ M170-A-8 | OEM-X-36 "Evap purge solenoid" [low_side_out] is wired to M170-A-8 "Half Bridge Output 2" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-X-38 ↔ M170-A-9 | OEM-X-38 "O2 sensor heater relay control" [low_side_out] is wired to M170-A-9 "Half Bridge Output 1" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-X-7 ↔ M170-A-59 | OEM-X-7 "VANOS intake camshaft solenoid" [low_side_out] is wired to M170-A-59 "Half Bridge Output 3" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-X-8 ↔ M170-A-65 | OEM-X-8 "Check engine light (MIL)" [low_side_out] is wired to M170-A-65 "Half Bridge Output 4" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | NET_FAMILY | OEM-X-1 ↔ M170-A-24 | OEM-X-1 "Fuel pump relay control" [low_side_out] is wired to M170-A-24 "Peak Hold Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-X-2 ↔ M170-A-57 | OEM-X-2 "Idle speed control valve (close winding)" [low_side_out] is wired to M170-A-57 "Peak Hold Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-X-27 ↔ M170-A-42 | OEM-X-27 "Main relay control" [low_side_out] is wired to M170-A-42 "Peak Hold Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-X-29 ↔ M170-A-62 | OEM-X-29 "Idle speed control valve (open winding)" [low_side_out] is wired to M170-A-62 "Peak Hold Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 3 optional OEM pins are not mapped: OEM-X-45 Shield ground; OEM-X-47 Tachometer output; OEM-X-56 Ignition switch (terminal 15) |
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-X 45: Shield ground: no shield pin on MoTeC M170 - OEM-X 56: Ignition switch (terminal 15): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); MoTeC M170 has no dedicated key-on input - OEM-X 47: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M170
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 | MoTeC: M1 ECU Hardware manual (7 Nov 2013) — M130/M150/M170/M190 pinout tables | https://web.archive.org/web/2023id_/https://www.motec.com.au/hessian/uploads/M1_ECU_Hardware_c2517380e4.pdf | — | 2026-10-05 | 03dc5975f739 |
| 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/ | — | — | — |