VW Golf Mk4 1.8T 20v (AUM, Bosch ME7.5) DBW → MoTeC M170 13170 (auto)
VW Golf Mk4 1.8T 20v (AUM, Bosch ME7.5) DBW — MoTeC — M170
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
Before you start
Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | 1: read the Findings page before cutting any wire |
| Size of the job | 61 wires · 7 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-T121-121 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-T121-21 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | M170-A-23 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | M170-A-32 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-14V-1 | M170-A-41 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-T121-62 | M170-A-54 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-T121-1 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-T121-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | M170-A-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | M170-A-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | M170-A-19 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | M170-A-20 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | M170-A-21 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-T121-108 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-T121-29 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-T121-34 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-T121-36 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-T121-90 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-T121-91 | 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-T121-72 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-T121-83 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-T121-99 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | SP-5V1-1 | M170-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-T121-73 | SP-5V2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-T121-98 | SP-5V2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | SP-5V2-1 | M170-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-T121-82 | M170-A-49 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-T121-86 | M170-A-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-T121-106 | M170-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-T121-107 | M170-A-60 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-T121-102 | M170-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-T121-95 | M170-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-T121-103 | M170-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-T121-94 | M170-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-T121-96 | M170-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-T121-89 | M170-A-43 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-T121-97 | M170-A-50 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-T121-88 | M170-A-51 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-T121-118 | M170-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-T121-117 | M170-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-T121-53 | M170-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-T121-101 | M170-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-T121-33 | M170-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-T121-84 | M170-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-T121-35 | M170-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-T121-92 | M170-A-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-T121-93 | M170-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-T121-65 | M170-A-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-T121-66 | M170-A-66 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-T121-5 | M170-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-T121-63 | M170-A-42 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-T121-104 | M170-A-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-T121-105 | M170-A-62 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-T121-68 | M170-A-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-T121-69 | M170-A-44 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-T121-85 | M170-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-T121-54 | M170-A-46 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-T121-60 | M170-A-40 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-T121-58 | M170-A-31 | 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-11 | M170-A-16 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 2 | M170-A-11 | M170-A-23 | open (OL) | sensor ground must not touch +12 V supply | |
| 3 | M170-A-11 | M170-A-34 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | M170-A-11 | M170-A-54 | open (OL) | sensor ground must not touch +12 V supply | |
| 5 | M170-A-14 | M170-A-16 | open (OL) | power ground must not touch 5 V sensor reference | |
| 6 | M170-A-14 | M170-A-23 | open (OL) | power ground must not touch +12 V supply | |
| 7 | M170-A-14 | M170-A-34 | open (OL) | power ground must not touch 5 V sensor reference | |
| 8 | M170-A-14 | M170-A-54 | open (OL) | power ground must not touch +12 V supply | |
| 9 | M170-A-23 | M170-A-16 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 10 | M170-A-23 | M170-A-34 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 11 | M170-A-54 | M170-A-16 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 12 | M170-A-54 | M170-A-34 | open (OL) | +12 V supply must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
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 | — | W33 | — | 0.5 | OEM-T121-102 | — | — | — |
| 10 | Low Side Ignition 4 | — | W36 | — | 0.5 | OEM-T121-94 | — | — | — |
| 11 | Sensor 0V A | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Analogue Voltage Input 5 | — | W47 | — | 0.5 | OEM-T121-35 | — | — | — |
| 13 | Universal Digital Input 7 | — | — | — | — | — | — | — | — |
| 14 | Battery Negative 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Battery Negative 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 16 | Sensor 5.0V A | — | W25 | — | 0.5 | SP-5V1-1 | — | — | — |
| 17 | Low Side Ignition 5 | — | — | — | — | — | — | — | — |
| 18 | Analogue Voltage Input 2 | — | W44 | — | 0.5 | OEM-T121-101 | — | — | — |
| 19 | Battery Negative 3 | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Low Side Ignition 8 | — | — | — | — | — | — | — | — |
| 20 | Battery Negative 4 | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Battery Negative 5 | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Universal Digital Input 8 | — | — | — | — | — | — | — | — |
| 23 | Battery Positive | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | Peak Hold Injector 5 | — | W52 | — | 0.5 | OEM-T121-5 | — | — | — |
| 25 | Low Side Ignition 6 | — | — | — | — | — | — | — | — |
| 26 | Analogue Voltage Input 1 | — | W43 | — | 0.5 | OEM-T121-53 | — | — | — |
| 27 | Sensor 0V B | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Analogue Temperature Input 1 | — | W49 | — | 0.5 | OEM-T121-93 | — | — | — |
| 29 | Knock Input 1 | — | W31 | — | 0.5 | OEM-T121-106 | — | — | — |
| 3 | Low Side Ignition 7 | — | — | — | — | — | — | — | — |
| 30 | Analogue Temperature Input 3 | — | — | — | — | — | — | — | — |
| 31 | CAN Bus 1 Low | — | W61 | — | 0.5 | OEM-T121-58 | — | — | — |
| 32 | Battery Positive | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 33 | Peak Hold Injector 1 | — | W37 | — | 0.5 | OEM-T121-96 | — | — | — |
| 34 | Sensor 5.0V B | — | W28 | — | 0.5 | SP-5V2-1 | — | — | — |
| 35 | Analogue Voltage Input 7 | — | W56 | — | 0.5 | OEM-T121-68 | — | — | — |
| 36 | Analogue Voltage Input 6 | — | W48 | — | 0.5 | OEM-T121-92 | — | — | — |
| 37 | Sensor 6.3V | — | — | — | — | — | — | — | — |
| 38 | Analogue Temperature Input 2 | — | W58 | — | 0.5 | OEM-T121-85 | — | — | — |
| 39 | Analogue Temperature Input 4 | — | — | — | — | — | — | — | — |
| 4 | Low Side Ignition 3 | — | W35 | — | 0.5 | OEM-T121-103 | — | — | — |
| 40 | CAN Bus 1 High | — | W60 | — | 0.5 | OEM-T121-60 | — | — | — |
| 41 | Battery Positive | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 42 | Peak Hold Injector 6 | — | W53 | — | 0.5 | OEM-T121-63 | — | — | — |
| 43 | Low Side Injector 1 | — | W38 | — | 0.5 | OEM-T121-89 | — | — | — |
| 44 | Analogue Voltage Input 8 | — | W57 | — | 0.5 | OEM-T121-69 | — | — | — |
| 45 | Universal Digital Input 4 | — | — | — | — | — | — | — | — |
| 46 | Universal Digital Input 3 | — | W59 | — | 0.5 | OEM-T121-54 | — | — | — |
| 47 | Ethernet Transmit - | — | — | — | — | — | — | — | — |
| 48 | Ethernet Transmit + | — | — | — | — | — | — | — | — |
| 49 | Universal Digital Input 1 | — | W29 | — | 0.5 | OEM-T121-82 | — | — | — |
| 5 | Low Side Ignition 2 | — | W34 | — | 0.5 | OEM-T121-95 | — | — | — |
| 50 | Peak Hold Injector 2 | — | W39 | — | 0.5 | OEM-T121-97 | — | — | — |
| 51 | Low Side Injector 2 | — | W40 | — | 0.5 | OEM-T121-88 | — | — | — |
| 52 | Universal Digital Input 5 | — | — | — | — | — | — | — | — |
| 53 | Universal Digital Input 6 | — | — | — | — | — | — | — | — |
| 54 | Battery Backup | — | W6 | — | 0.85 | OEM-T121-62 | — | — | — |
| 55 | Ethernet Receive + | — | — | — | — | — | — | — | — |
| 56 | Universal Digital Input 2 | — | W30 | — | 0.5 | OEM-T121-86 | — | — | — |
| 57 | Peak Hold Injector 7 | — | W54 | — | 0.5 | OEM-T121-104 | — | — | — |
| 58 | Half Bridge Output 5 | — | — | — | — | — | — | — | — |
| 59 | Half Bridge Output 3 | — | — | — | — | — | — | — | — |
| 6 | Analogue Voltage Input 3 | — | W45 | — | 0.5 | OEM-T121-33 | — | — | — |
| 60 | Knock Input 2 | — | W32 | — | 0.5 | OEM-T121-107 | — | — | — |
| 61 | Ethernet Receive - | — | — | — | — | — | — | — | — |
| 62 | Peak Hold Injector 8 | — | W55 | — | 0.5 | OEM-T121-105 | — | — | — |
| 63 | Peak Hold Injector 3 | — | W50 | — | 0.5 | OEM-T121-65 | — | — | — |
| 64 | Half Bridge Output 6 | — | — | — | — | — | — | — | — |
| 65 | Half Bridge Output 4 | — | — | — | — | — | — | — | — |
| 66 | Peak Hold Injector 4 | — | W51 | — | 0.5 | OEM-T121-66 | — | — | — |
| 7 | Analogue Voltage Input 4 | — | W46 | — | 0.5 | OEM-T121-84 | — | — | — |
| 8 | Half Bridge Output 2 | — | W41 | — | 0.5 | OEM-T121-118 | — | — | — |
| 9 | Half Bridge Output 1 | — | W42 | — | 0.5 | OEM-T121-117 | — | — | — |
OEM-T121
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 101 | Boost pressure sensor (G31) | — | W44 | — | 0.5 | M170-A-18 | — | — | — |
| 102 | Ignition coil 1 (N127) | — | W33 | — | 0.5 | M170-A-1 | — | — | — |
| 103 | Ignition coil 3 (N158) | — | W35 | — | 0.5 | M170-A-4 | — | — | — |
| 104 | Boost control solenoid (N75) | — | W54 | — | 0.5 | M170-A-57 | — | — | — |
| 105 | Diverter valve (N249) | — | W55 | — | 0.5 | M170-A-62 | — | — | — |
| 106 | Knock sensor 1 (G61) | — | W31 | — | 0.5 | M170-A-29 | — | — | — |
| 107 | Knock sensor 2 (G66) | — | W32 | — | 0.5 | M170-A-60 | — | — | — |
| 108 | Sensor ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 115 | VVT camshaft adjustment valve (N205) | — | — | — | — | — | — | — | — |
| 117 | Throttle motor G186 (+) | — | W42 | — | 0.5 | M170-A-9 | — | — | — |
| 118 | Throttle motor G186 (−) | — | W41 | — | 0.5 | M170-A-8 | — | — | — |
| 121 | ECM + coil power (J271 relay feed) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | ECU ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | ECM power (J271 relay feed) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | MAF sensor supply (G70) | — | — | — | — | — | — | — | — |
| 29 | MAF sensor ground (G70) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Ignition switch +12V (term 15) | — | — | — | — | — | — | — | — |
| 33 | Accelerator pedal position 1 (G79) | — | W45 | — | 0.5 | M170-A-6 | — | — | — |
| 34 | Accelerator pedal position 1 ground (G79) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 35 | Accelerator pedal position 2 (G185) | — | W47 | — | 0.5 | M170-A-12 | — | — | — |
| 36 | Accelerator pedal position 2 ground (G185) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 37 | Engine speed signal (tacho to cluster) | — | — | — | — | — | — | — | — |
| 43 | K-line diagnostics (OBD pin 7) | — | — | — | — | — | — | — | — |
| 47 | Check engine light (MIL) | — | — | — | — | — | — | — | — |
| 48 | EPC warning light | — | — | — | — | — | — | — | — |
| 5 | Wideband lambda heater (Z19) | — | W52 | — | 0.5 | M170-A-24 | — | — | — |
| 51 | Wideband lambda pump (G39) | — | — | — | — | — | — | — | — |
| 52 | Wideband lambda pump (G39) | — | — | — | — | — | — | — | — |
| 53 | MAF sensor signal (G70) | — | W43 | — | 0.5 | M170-A-26 | — | — | — |
| 54 | Road speed signal (VSS) | — | W59 | — | 0.5 | M170-A-46 | — | — | — |
| 58 | CAN bus low | — | W61 | — | 0.5 | M170-A-31 | — | — | — |
| 60 | CAN bus high | — | W60 | — | 0.5 | M170-A-40 | — | — | — |
| 62 | Battery constant +12V (term 30) | — | W6 | — | 0.85 | M170-A-54 | — | — | — |
| 63 | Post-cat lambda heater (Z29) | — | W53 | — | 0.5 | M170-A-42 | — | — | — |
| 64 | EVAP canister valve (N80) | — | — | — | — | — | — | — | — |
| 65 | Fuel pump relay control | — | W50 | — | 0.5 | M170-A-63 | — | — | — |
| 66 | Secondary-air pump relay (J299) | — | W51 | — | 0.5 | M170-A-66 | — | — | — |
| 68 | Post-cat lambda signal (G130) | — | W56 | — | 0.5 | M170-A-35 | — | — | — |
| 69 | Post-cat lambda signal (G130) | — | W57 | — | 0.5 | M170-A-44 | — | — | — |
| 70 | Wideband lambda Nernst signal (G39) | — | — | — | — | — | — | — | — |
| 71 | Wideband lambda Nernst signal (G39) | — | — | — | — | — | — | — | — |
| 72 | Accelerator pedal position 1 5V supply (G79) | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
| 73 | Accelerator pedal position 2 5V supply (G185) | — | W26 | — | 0.5 | SP-5V2-1 | — | — | — |
| 82 | Crank position sensor (G28) | — | W29 | — | 0.5 | M170-A-49 | — | — | — |
| 83 | Throttle position sensor 5V supply (G187/G188) | — | W23 | — | 0.5 | SP-5V1-1 | — | — | — |
| 84 | Throttle position sensor 1 (G187) | — | W46 | — | 0.5 | M170-A-7 | — | — | — |
| 85 | Intake air temperature (G42) | — | W58 | — | 0.5 | M170-A-38 | — | — | — |
| 86 | Camshaft position sensor (G40) | — | W30 | — | 0.5 | M170-A-56 | — | — | — |
| 88 | Injector 4 (N33) | — | W40 | — | 0.5 | M170-A-51 | — | — | — |
| 89 | Injector 2 (N31) | — | W38 | — | 0.5 | M170-A-43 | — | — | — |
| 9 | Secondary-air injection valve (N112) | — | — | — | — | — | — | — | — |
| 90 | Crank position sensor ground (G28) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 91 | Throttle position sensor ground (G187/G188) | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 92 | Throttle position sensor 2 (G188) | — | W48 | — | 0.5 | M170-A-36 | — | — | — |
| 93 | Engine coolant temperature (G62) | — | W49 | — | 0.5 | M170-A-28 | — | — | — |
| 94 | Ignition coil 4 (N163) | — | W36 | — | 0.5 | M170-A-10 | — | — | — |
| 95 | Ignition coil 2 (N128) | — | W34 | — | 0.5 | M170-A-5 | — | — | — |
| 96 | Injector 1 (N30) | — | W37 | — | 0.5 | M170-A-33 | — | — | — |
| 97 | Injector 3 (N32) | — | W39 | — | 0.5 | M170-A-50 | — | — | — |
| 98 | Cam + boost sensor 5V supply (G40/G31) | — | W27 | — | 0.5 | SP-5V2-1 | — | — | — |
| 99 | Knock sensor 5V supply (G61/G66) | — | W24 | — | 0.5 | SP-5V1-1 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W14 | — | 0.5 | OEM-T121-108 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-T121-29 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-T121-34 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-T121-36 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-T121-90 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-T121-91 | — | — | — |
| 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-T121-121 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-T121-21 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | M170-A-23 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | M170-A-32 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | M170-A-41 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W22 | — | 0.5 | OEM-T121-72 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-T121-83 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | OEM-T121-99 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | M170-A-16 | — | — | — |
SP-5V2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W26 | — | 0.5 | OEM-T121-73 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | OEM-T121-98 | — | — | — |
| 1 | — | — | W28 | — | 0.5 | M170-A-34 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W7 | — | 0.85 | OEM-T121-1 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-T121-2 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | M170-A-14 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | M170-A-15 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | M170-A-19 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | M170-A-20 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | M170-A-21 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-T121-1 | ECU 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-T121-101 | Boost pressure sensor (G31) | analog_in | M170-A-18 | Analogue Voltage Input 2 | analog_in | corroborated | |
| OEM-T121-102 | Ignition coil 1 (N127) | ignition_out | M170-A-1 | Low Side Ignition 1 | ignition_out | corroborated | |
| OEM-T121-103 | Ignition coil 3 (N158) | ignition_out | M170-A-4 | Low Side Ignition 3 | ignition_out | corroborated | |
| OEM-T121-104 | Boost control solenoid (N75) | low_side_out | M170-A-57 | Peak Hold Injector 7 | injector_out | corroborated | |
| OEM-T121-105 | Diverter valve (N249) | low_side_out | M170-A-62 | Peak Hold Injector 8 | injector_out | corroborated | |
| OEM-T121-106 | Knock sensor 1 (G61) | knock_in | M170-A-29 | Knock Input 1 | knock_in | corroborated | |
| OEM-T121-107 | Knock sensor 2 (G66) | knock_in | M170-A-60 | Knock Input 2 | knock_in | corroborated | |
| OEM-T121-108 | Sensor ground | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-T121-115 | VVT camshaft adjustment valve (N205) | low_side_out | — | — | — | corroborated | |
| OEM-T121-117 | Throttle motor G186 (+) | hbridge_out | M170-A-9 | Half Bridge Output 1 | hbridge_out | corroborated | |
| OEM-T121-118 | Throttle motor G186 (−) | hbridge_out | M170-A-8 | Half Bridge Output 2 | hbridge_out | corroborated | |
| OEM-T121-121 | ECM + coil power (J271 relay feed) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | corroborated | |
| OEM-T121-2 | ECU 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-T121-21 | ECM power (J271 relay feed) | power_in | M170-A-23 + M170-A-32 + M170-A-41 | Battery Positive + Battery Positive + Battery Positive | power_in | corroborated | |
| OEM-T121-27 | MAF sensor supply (G70) | power_in | — | — | — | corroborated | |
| OEM-T121-29 | MAF sensor ground (G70) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-T121-3 | Ignition switch +12V (term 15) | digital_in | — | — | — | corroborated | |
| OEM-T121-33 | Accelerator pedal position 1 (G79) | analog_in | M170-A-6 | Analogue Voltage Input 3 | analog_in | corroborated | |
| OEM-T121-34 | Accelerator pedal position 1 ground (G79) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-T121-35 | Accelerator pedal position 2 (G185) | analog_in | M170-A-12 | Analogue Voltage Input 5 | analog_in | corroborated | |
| OEM-T121-36 | Accelerator pedal position 2 ground (G185) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-T121-37 | Engine speed signal (tacho to cluster) | tacho_out | — | — | — | corroborated | |
| OEM-T121-43 | K-line diagnostics (OBD pin 7) | serial | — | — | — | corroborated | |
| OEM-T121-47 | Check engine light (MIL) | low_side_out | — | — | — | corroborated | |
| OEM-T121-48 | EPC warning light | low_side_out | — | — | — | corroborated | |
| OEM-T121-5 | Wideband lambda heater (Z19) | low_side_out | M170-A-24 | Peak Hold Injector 5 | injector_out | corroborated | |
| OEM-T121-51 | Wideband lambda pump (G39) | wb_ip | — | — | — | corroborated | |
| OEM-T121-52 | Wideband lambda pump (G39) | wb_ip | — | — | — | corroborated | |
| OEM-T121-53 | MAF sensor signal (G70) | analog_in | M170-A-26 | Analogue Voltage Input 1 | analog_in | corroborated | |
| OEM-T121-54 | Road speed signal (VSS) | digital_in | M170-A-46 | Universal Digital Input 3 | digital_in | corroborated | |
| OEM-T121-58 | CAN bus low | can_l | M170-A-31 | CAN Bus 1 Low | can_l | corroborated | |
| OEM-T121-60 | CAN bus high | can_h | M170-A-40 | CAN Bus 1 High | can_h | corroborated | |
| OEM-T121-62 | Battery constant +12V (term 30) | power_in | M170-A-54 | Battery Backup | power_in | corroborated | |
| OEM-T121-63 | Post-cat lambda heater (Z29) | low_side_out | M170-A-42 | Peak Hold Injector 6 | injector_out | corroborated | |
| OEM-T121-64 | EVAP canister valve (N80) | low_side_out | — | — | — | corroborated | |
| OEM-T121-65 | Fuel pump relay control | low_side_out | M170-A-63 | Peak Hold Injector 3 | injector_out | corroborated | |
| OEM-T121-66 | Secondary-air pump relay (J299) | low_side_out | M170-A-66 | Peak Hold Injector 4 | injector_out | corroborated | |
| OEM-T121-68 | Post-cat lambda signal (G130) | lambda_nb_in | M170-A-35 | Analogue Voltage Input 7 | analog_in | corroborated | |
| OEM-T121-69 | Post-cat lambda signal (G130) | lambda_nb_in | M170-A-44 | Analogue Voltage Input 8 | analog_in | corroborated | |
| OEM-T121-70 | Wideband lambda Nernst signal (G39) | wb_vs | — | — | — | corroborated | |
| OEM-T121-71 | Wideband lambda Nernst signal (G39) | wb_vs | — | — | — | corroborated | |
| OEM-T121-72 | Accelerator pedal position 1 5V supply (G79) | vref | M170-A-16 | Sensor 5.0V A | vref | corroborated | |
| OEM-T121-73 | Accelerator pedal position 2 5V supply (G185) | vref | M170-A-34 | Sensor 5.0V B | vref | corroborated | |
| OEM-T121-82 | Crank position sensor (G28) | trigger_in | M170-A-49 | Universal Digital Input 1 | digital_in | corroborated | |
| OEM-T121-83 | Throttle position sensor 5V supply (G187/G188) | vref | M170-A-16 | Sensor 5.0V A | vref | corroborated | |
| OEM-T121-84 | Throttle position sensor 1 (G187) | analog_in | M170-A-7 | Analogue Voltage Input 4 | analog_in | corroborated | |
| OEM-T121-85 | Intake air temperature (G42) | temp_in | M170-A-38 | Analogue Temperature Input 2 | temp_in | corroborated | |
| OEM-T121-86 | Camshaft position sensor (G40) | trigger_in | M170-A-56 | Universal Digital Input 2 | digital_in | corroborated | |
| OEM-T121-88 | Injector 4 (N33) | injector_out | M170-A-51 | Low Side Injector 2 | injector_out | corroborated | |
| OEM-T121-89 | Injector 2 (N31) | injector_out | M170-A-43 | Low Side Injector 1 | injector_out | corroborated | |
| OEM-T121-9 | Secondary-air injection valve (N112) | low_side_out | — | — | — | corroborated | |
| OEM-T121-90 | Crank position sensor ground (G28) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-T121-91 | Throttle position sensor ground (G187/G188) | sensor_ground | M170-A-11 + M170-A-27 | Sensor 0V A + Sensor 0V B | sensor_ground | corroborated | |
| OEM-T121-92 | Throttle position sensor 2 (G188) | analog_in | M170-A-36 | Analogue Voltage Input 6 | analog_in | corroborated | |
| OEM-T121-93 | Engine coolant temperature (G62) | temp_in | M170-A-28 | Analogue Temperature Input 1 | temp_in | corroborated | |
| OEM-T121-94 | Ignition coil 4 (N163) | ignition_out | M170-A-10 | Low Side Ignition 4 | ignition_out | corroborated | |
| OEM-T121-95 | Ignition coil 2 (N128) | ignition_out | M170-A-5 | Low Side Ignition 2 | ignition_out | corroborated | |
| OEM-T121-96 | Injector 1 (N30) | injector_out | M170-A-33 | Peak Hold Injector 1 | injector_out | corroborated | |
| OEM-T121-97 | Injector 3 (N32) | injector_out | M170-A-50 | Peak Hold Injector 2 | injector_out | corroborated | |
| OEM-T121-98 | Cam + boost sensor 5V supply (G40/G31) | vref | M170-A-34 | Sensor 5.0V B | vref | corroborated | |
| OEM-T121-99 | Knock sensor 5V supply (G61/G66) | vref | M170-A-16 | Sensor 5.0V A | vref | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-T121-121 | SP-14V-1 | 0.85 | no route | ECM + coil power (J271 relay feed) | — | |
| W2 | OEM-T121-21 | SP-14V-1 | 0.85 | no route | ECM power (J271 relay feed) | — | |
| W3 | SP-14V-1 | M170-A-23 | 0.85 | no route | Battery Positive | — | |
| W4 | SP-14V-1 | M170-A-32 | 0.85 | no route | Battery Positive | — | |
| W5 | SP-14V-1 | M170-A-41 | 0.85 | no route | Battery Positive | — | |
| W6 | OEM-T121-62 | M170-A-54 | 0.85 | no route | Battery constant +12V (term 30) | — | |
| W7 | OEM-T121-1 | SP-GND-1 | 0.85 | no route | ECU ground | — | |
| W8 | OEM-T121-2 | SP-GND-1 | 0.85 | no route | ECU ground | — | |
| W9 | SP-GND-1 | M170-A-14 | 0.85 | no route | Battery Negative 1 | — | |
| W10 | SP-GND-1 | M170-A-15 | 0.85 | no route | Battery Negative 2 | — | |
| W11 | SP-GND-1 | M170-A-19 | 0.85 | no route | Battery Negative 3 | — | |
| W12 | SP-GND-1 | M170-A-20 | 0.85 | no route | Battery Negative 4 | — | |
| W13 | SP-GND-1 | M170-A-21 | 0.85 | no route | Battery Negative 5 | — | |
| W14 | OEM-T121-108 | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W15 | OEM-T121-29 | SP-0V-1 | 0.5 | no route | MAF sensor ground (G70) | — | |
| W16 | OEM-T121-34 | SP-0V-1 | 0.5 | no route | Accelerator pedal position 1 ground (G79) | — | |
| W17 | OEM-T121-36 | SP-0V-1 | 0.5 | no route | Accelerator pedal position 2 ground (G185) | — | |
| W18 | OEM-T121-90 | SP-0V-1 | 0.5 | no route | Crank position sensor ground (G28) | — | |
| W19 | OEM-T121-91 | SP-0V-1 | 0.5 | no route | Throttle position sensor ground (G187/G188) | — | |
| 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-T121-72 | SP-5V1-1 | 0.5 | no route | Accelerator pedal position 1 5V supply (G79) | — | |
| W23 | OEM-T121-83 | SP-5V1-1 | 0.5 | no route | Throttle position sensor 5V supply (G187/G188) | — | |
| W24 | OEM-T121-99 | SP-5V1-1 | 0.5 | no route | Knock sensor 5V supply (G61/G66) | — | |
| W25 | SP-5V1-1 | M170-A-16 | 0.5 | no route | Sensor 5.0V A | — | |
| W26 | OEM-T121-73 | SP-5V2-1 | 0.5 | no route | Accelerator pedal position 2 5V supply (G185) | — | |
| W27 | OEM-T121-98 | SP-5V2-1 | 0.5 | no route | Cam + boost sensor 5V supply (G40/G31) | — | |
| W28 | SP-5V2-1 | M170-A-34 | 0.5 | no route | Sensor 5.0V B | — | |
| W29 | OEM-T121-82 | M170-A-49 | 0.5 | no route | Crank position sensor (G28) | — | |
| W30 | OEM-T121-86 | M170-A-56 | 0.5 | no route | Camshaft position sensor (G40) | — | |
| W31 | OEM-T121-106 | M170-A-29 | 0.5 | no route | Knock sensor 1 (G61) | — | |
| W32 | OEM-T121-107 | M170-A-60 | 0.5 | no route | Knock sensor 2 (G66) | — | |
| W33 | OEM-T121-102 | M170-A-1 | 0.5 | no route | Ignition coil 1 (N127) | — | |
| W34 | OEM-T121-95 | M170-A-5 | 0.5 | no route | Ignition coil 2 (N128) | — | |
| W35 | OEM-T121-103 | M170-A-4 | 0.5 | no route | Ignition coil 3 (N158) | — | |
| W36 | OEM-T121-94 | M170-A-10 | 0.5 | no route | Ignition coil 4 (N163) | — | |
| W37 | OEM-T121-96 | M170-A-33 | 0.5 | no route | Injector 1 (N30) | — | |
| W38 | OEM-T121-89 | M170-A-43 | 0.5 | no route | Injector 2 (N31) | — | |
| W39 | OEM-T121-97 | M170-A-50 | 0.5 | no route | Injector 3 (N32) | — | |
| W40 | OEM-T121-88 | M170-A-51 | 0.5 | no route | Injector 4 (N33) | — | |
| W41 | OEM-T121-118 | M170-A-8 | 0.5 | no route | Throttle motor G186 (−) | — | |
| W42 | OEM-T121-117 | M170-A-9 | 0.5 | no route | Throttle motor G186 (+) | — | |
| W43 | OEM-T121-53 | M170-A-26 | 0.5 | no route | MAF sensor signal (G70) | — | |
| W44 | OEM-T121-101 | M170-A-18 | 0.5 | no route | Boost pressure sensor (G31) | — | |
| W45 | OEM-T121-33 | M170-A-6 | 0.5 | no route | Accelerator pedal position 1 (G79) | — | |
| W46 | OEM-T121-84 | M170-A-7 | 0.5 | no route | Throttle position sensor 1 (G187) | — | |
| W47 | OEM-T121-35 | M170-A-12 | 0.5 | no route | Accelerator pedal position 2 (G185) | — | |
| W48 | OEM-T121-92 | M170-A-36 | 0.5 | no route | Throttle position sensor 2 (G188) | — | |
| W49 | OEM-T121-93 | M170-A-28 | 0.5 | no route | Engine coolant temperature (G62) | — | |
| W50 | OEM-T121-65 | M170-A-63 | 0.5 | no route | Fuel pump relay control | — | |
| W51 | OEM-T121-66 | M170-A-66 | 0.5 | no route | Secondary-air pump relay (J299) | — | |
| W52 | OEM-T121-5 | M170-A-24 | 0.5 | no route | Wideband lambda heater (Z19) | — | |
| W53 | OEM-T121-63 | M170-A-42 | 0.5 | no route | Post-cat lambda heater (Z29) | — | |
| W54 | OEM-T121-104 | M170-A-57 | 0.5 | no route | Boost control solenoid (N75) | — | |
| W55 | OEM-T121-105 | M170-A-62 | 0.5 | no route | Diverter valve (N249) | — | |
| W56 | OEM-T121-68 | M170-A-35 | 0.5 | no route | Post-cat lambda signal (G130) | — | |
| W57 | OEM-T121-69 | M170-A-44 | 0.5 | no route | Post-cat lambda signal (G130) | — | |
| W58 | OEM-T121-85 | M170-A-38 | 0.5 | no route | Intake air temperature (G42) | — | |
| W59 | OEM-T121-54 | M170-A-46 | 0.5 | no route | Road speed signal (VSS) | — | |
| W60 | OEM-T121-60 | M170-A-40 | 0.5 | no route | CAN bus high | — | |
| W61 | OEM-T121-58 | M170-A-31 | 0.5 | no route | CAN bus low | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (16)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-T121-3 | Required OEM function "Ignition switch +12V (term 15)" (digital_in) is not connected to the new ECU. |
| warn | DBW_MOTOR_CURRENT | M170-A-8 | Cannot confirm M170 can drive the throttle motor: M170-A-8 "Half Bridge Output 2" is rated 12.0 A peak, but the motor stall current at OEM-T121-118 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A). |
| warn | DBW_MOTOR_CURRENT | M170-A-9 | Cannot confirm M170 can drive the throttle motor: M170-A-9 "Half Bridge Output 1" is rated 12.0 A peak, but the motor stall current at OEM-T121-117 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A). |
| warn | DBW_SHARED_5V | M170-A-16 + OEM-T121-72 + OEM-T121-83 + OEM-T121-99 + SP-5V1-1 | These 5 V supplies are separate in the stock car (OEM-T121-72 [pedal1], OEM-T121-83 [tps], OEM-T121-99 [knock]) and here share one ECU 5 V (M170-A-16). On a drive-by-wire car the OEM splits them so one short or fault can't corrupt both throttle/pedal tracks at once. M170 has 2 5 V sensor supply pin(s). All are in use, so decide: accept the shared supply (and rely on the ECU's DBW fault checks), or add a separate regulated 5 V for the sub tracks. |
| warn | DBW_SHARED_5V | M170-A-34 + OEM-T121-73 + OEM-T121-98 + SP-5V2-1 | These 5 V supplies are separate in the stock car (OEM-T121-73 [pedal2], OEM-T121-98 [cam_boost]) and here share one ECU 5 V (M170-A-34). On a drive-by-wire car the OEM splits them so one short or fault can't corrupt both throttle/pedal tracks at once. M170 has 2 5 V sensor supply pin(s). All are in use, so decide: accept the shared supply (and rely on the ECU's DBW fault checks), or add a separate regulated 5 V for the sub tracks. |
| warn | NET_FAMILY | OEM-T121-82 ↔ M170-A-49 | OEM-T121-82 "Crank position sensor (G28)" [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-T121-86 ↔ M170-A-56 | OEM-T121-86 "Camshaft position sensor (G40)" [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 | SUPPLY_GROUP | M170-A-16 + OEM-T121-72 + OEM-T121-83 + OEM-T121-99 + SP-5V1-1 | Supplies meant to stay independent share one net: OEM-T121-72 [pedal1], OEM-T121-83 [tps], OEM-T121-99 [knock]. The new ECU has no free 5 V reference, so they share one: normal on a standalone, but a short on any of these sensors drops them all. |
| warn | SUPPLY_GROUP | M170-A-34 + OEM-T121-73 + OEM-T121-98 + SP-5V2-1 | Supplies meant to stay independent share one net: OEM-T121-73 [pedal2], OEM-T121-98 [cam_boost]. The new ECU has no free 5 V reference, so they share one: normal on a standalone, but a short on any of these sensors drops them all. |
| info | NET_FAMILY | OEM-T121-104 ↔ M170-A-57 | OEM-T121-104 "Boost control solenoid (N75)" [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-T121-105 ↔ M170-A-62 | OEM-T121-105 "Diverter valve (N249)" [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 | NET_FAMILY | OEM-T121-5 ↔ M170-A-24 | OEM-T121-5 "Wideband lambda heater (Z19)" [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-T121-63 ↔ M170-A-42 | OEM-T121-63 "Post-cat lambda heater (Z29)" [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-T121-65 ↔ M170-A-63 | OEM-T121-65 "Fuel pump relay control" [low_side_out] is wired to M170-A-63 "Peak Hold Injector 3" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-T121-66 ↔ M170-A-66 | OEM-T121-66 "Secondary-air pump relay (J299)" [low_side_out] is wired to M170-A-66 "Peak Hold Injector 4" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 12 optional OEM pins are not mapped: OEM-T121-115 VVT camshaft adjustment valve (N205); OEM-T121-27 MAF sensor supply (G70); OEM-T121-37 Engine speed signal (tacho to cluster); OEM-T121-43 K-line diagnostics (OBD pin 7); OEM-T121-47 Check engine light (MIL); OEM-T121-48 EPC warning light; OEM-T121-51 Wideband lambda pump (G39); OEM-T121-52 Wideband lambda pump (G39); OEM-T121-64 EVAP canister valve (N80); OEM-T121-70 Wideband lambda Nernst signal (G39); OEM-T121-71 Wideband lambda Nernst signal (G39); OEM-T121-9 Secondary-air injection valve (N112) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-T121 3: Ignition switch +12V (term 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 Not wired: - OEM-T121 115: VVT camshaft adjustment valve (N205): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-T121 47: Check engine light (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-T121 48: EPC warning light: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-T121 64: EVAP canister valve (N80): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-T121 9: Secondary-air injection valve (N112): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-T121 37: Engine speed signal (tacho to cluster): no free tacho/frequency_out/low_side/ls_hs on MoTeC M170 - OEM-T121 51: Wideband lambda pump (G39): no free wb_ip on MoTeC M170 - OEM-T121 52: Wideband lambda pump (G39): no free wb_ip on MoTeC M170 - OEM-T121 70: Wideband lambda Nernst signal (G39): no free wb_vs on MoTeC M170 - OEM-T121 71: Wideband lambda Nernst signal (G39): no free wb_vs on MoTeC M170 - OEM-T121 43: K-line diagnostics (OBD pin 7): no free k_line on MoTeC M170 - OEM-T121 27: MAF sensor supply (G70): no rule for class sensor_supply_in; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 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 |
| 3 | community_copy | NefMoto: ME7.5 ECU bench-flashing power/ground pins | http://nefmoto.com/wiki/index.php?title=ECU_Bench_Flashing | — | — | — |
| 3 | community_copy | vwressources: Bosch Motronic ME7.5 (AMK/ARY/AUQ/ARX/AUM) T121 pinout | https://www.vwressources.planethoster.world/me75_pinout.html | — | — | — |