VW Golf Mk4 1.8T 20v (AUM, Bosch ME7.5) DBW → Emtron Shadow 8 (auto)
VW Golf Mk4 1.8T 20v (AUM, Bosch ME7.5) DBW — Emtron — Shadow 8
⚠ 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 | none |
| Size of the job | 62 wires · 7 connectors · 3 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Terminals | 3-1447221-4 |
| 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 | SHADOW8-A-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | SHADOW8-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-T121-62 | SHADOW8-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-T121-1 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-T121-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | SHADOW8-A-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | SHADOW8-A-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-T121-108 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-T121-29 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-T121-34 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-T121-36 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-T121-90 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-T121-91 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | SHADOW8-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | SHADOW8-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-T121-72 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-T121-73 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-T121-83 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-T121-98 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-T121-99 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-5V1-1 | SHADOW8-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-T121-82 | SHADOW8-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-T121-86 | SHADOW8-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-T121-106 | SHADOW8-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-T121-107 | SHADOW8-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-T121-102 | SHADOW8-B-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-T121-95 | SHADOW8-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-T121-103 | SHADOW8-B-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-T121-94 | SHADOW8-B-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-T121-96 | SHADOW8-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-T121-89 | SHADOW8-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-T121-97 | SHADOW8-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-T121-88 | SHADOW8-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-T121-118 | SHADOW8-B-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-T121-117 | SHADOW8-B-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-T121-3 | SHADOW8-B-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-T121-53 | SHADOW8-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-T121-101 | SHADOW8-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-T121-33 | SHADOW8-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-T121-84 | SHADOW8-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-T121-35 | SHADOW8-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-T121-92 | SHADOW8-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-T121-93 | SHADOW8-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-T121-65 | SHADOW8-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-T121-66 | SHADOW8-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-T121-5 | SHADOW8-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-T121-63 | SHADOW8-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-T121-104 | SHADOW8-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-T121-105 | SHADOW8-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-T121-115 | SHADOW8-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-T121-47 | SHADOW8-B-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-T121-48 | SHADOW8-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-T121-64 | SHADOW8-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-T121-9 | SHADOW8-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-T121-68 | SHADOW8-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-T121-69 | SHADOW8-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-T121-85 | SHADOW8-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-T121-54 | SHADOW8-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-T121-60 | SHADOW8-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-T121-58 | SHADOW8-A-23 | 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 | SHADOW8-A-1 | SHADOW8-A-3 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 2 | SHADOW8-A-34 | SHADOW8-A-1 | open (OL) | power ground must not touch +12 V supply | |
| 3 | SHADOW8-A-34 | SHADOW8-A-3 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | SHADOW8-A-34 | SHADOW8-B-1 | open (OL) | power ground must not touch +12 V supply | |
| 5 | SHADOW8-A-4 | SHADOW8-A-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 6 | SHADOW8-A-4 | SHADOW8-A-3 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 7 | SHADOW8-A-4 | SHADOW8-B-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 8 | SHADOW8-B-1 | SHADOW8-A-3 | 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
OEM-T121
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 101 | Boost pressure sensor (G31) | — | W40 | — | 0.5 | SHADOW8-A-11 | — | — | — |
| 102 | Ignition coil 1 (N127) | — | W28 | — | 0.5 | SHADOW8-B-27 | — | — | — |
| 103 | Ignition coil 3 (N158) | — | W30 | — | 0.5 | SHADOW8-B-29 | — | — | — |
| 104 | Boost control solenoid (N75) | — | W50 | — | 0.5 | SHADOW8-B-14 | — | — | — |
| 105 | Diverter valve (N249) | — | W51 | — | 0.5 | SHADOW8-B-15 | — | — | — |
| 106 | Knock sensor 1 (G61) | — | W26 | — | 0.5 | SHADOW8-A-16 | — | — | — |
| 107 | Knock sensor 2 (G66) | — | W27 | — | 0.5 | SHADOW8-A-24 | — | — | — |
| 108 | Sensor ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 115 | VVT camshaft adjustment valve (N205) | — | W52 | — | 0.5 | SHADOW8-B-16 | — | — | — |
| 117 | Throttle motor G186 (+) | — | W37 | — | 0.5 | SHADOW8-B-22 | — | — | — |
| 118 | Throttle motor G186 (−) | — | W36 | — | 0.5 | SHADOW8-B-23 | — | — | — |
| 121 | ECM + coil power (J271 relay feed) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | ECU ground | — | W7 | — | 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) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Ignition switch +12V (term 15) | — | W38 | — | 0.5 | SHADOW8-B-21 | — | — | — |
| 33 | Accelerator pedal position 1 (G79) | — | W41 | — | 0.5 | SHADOW8-A-12 | — | — | — |
| 34 | Accelerator pedal position 1 ground (G79) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 35 | Accelerator pedal position 2 (G185) | — | W43 | — | 0.5 | SHADOW8-A-14 | — | — | — |
| 36 | Accelerator pedal position 2 ground (G185) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 37 | Engine speed signal (tacho to cluster) | — | — | — | — | — | — | — | — |
| 43 | K-line diagnostics (OBD pin 7) | — | — | — | — | — | — | — | — |
| 47 | Check engine light (MIL) | — | W53 | — | 0.5 | SHADOW8-B-17 | — | — | — |
| 48 | EPC warning light | — | W54 | — | 0.5 | SHADOW8-B-6 | — | — | — |
| 5 | Wideband lambda heater (Z19) | — | W48 | — | 0.5 | SHADOW8-B-12 | — | — | — |
| 51 | Wideband lambda pump (G39) | — | — | — | — | — | — | — | — |
| 52 | Wideband lambda pump (G39) | — | — | — | — | — | — | — | — |
| 53 | MAF sensor signal (G70) | — | W39 | — | 0.5 | SHADOW8-A-10 | — | — | — |
| 54 | Road speed signal (VSS) | — | W60 | — | 0.5 | SHADOW8-A-26 | — | — | — |
| 58 | CAN bus low | — | W62 | — | 0.5 | SHADOW8-A-23 | — | — | — |
| 60 | CAN bus high | — | W61 | — | 0.5 | SHADOW8-A-15 | — | — | — |
| 62 | Battery constant +12V (term 30) | — | W5 | — | 0.85 | SHADOW8-B-1 | — | — | — |
| 63 | Post-cat lambda heater (Z29) | — | W49 | — | 0.5 | SHADOW8-B-13 | — | — | — |
| 64 | EVAP canister valve (N80) | — | W55 | — | 0.5 | SHADOW8-B-7 | — | — | — |
| 65 | Fuel pump relay control | — | W46 | — | 0.5 | SHADOW8-B-10 | — | — | — |
| 66 | Secondary-air pump relay (J299) | — | W47 | — | 0.5 | SHADOW8-B-11 | — | — | — |
| 68 | Post-cat lambda signal (G130) | — | W57 | — | 0.5 | SHADOW8-A-20 | — | — | — |
| 69 | Post-cat lambda signal (G130) | — | W58 | — | 0.5 | SHADOW8-A-21 | — | — | — |
| 70 | Wideband lambda Nernst signal (G39) | — | — | — | — | — | — | — | — |
| 71 | Wideband lambda Nernst signal (G39) | — | — | — | — | — | — | — | — |
| 72 | Accelerator pedal position 1 5V supply (G79) | — | W18 | — | 0.5 | SP-5V1-1 | — | — | — |
| 73 | Accelerator pedal position 2 5V supply (G185) | — | W19 | — | 0.5 | SP-5V1-1 | — | — | — |
| 82 | Crank position sensor (G28) | — | W24 | — | 0.5 | SHADOW8-A-5 | — | — | — |
| 83 | Throttle position sensor 5V supply (G187/G188) | — | W20 | — | 0.5 | SP-5V1-1 | — | — | — |
| 84 | Throttle position sensor 1 (G187) | — | W42 | — | 0.5 | SHADOW8-A-13 | — | — | — |
| 85 | Intake air temperature (G42) | — | W59 | — | 0.5 | SHADOW8-A-22 | — | — | — |
| 86 | Camshaft position sensor (G40) | — | W25 | — | 0.5 | SHADOW8-A-6 | — | — | — |
| 88 | Injector 4 (N33) | — | W35 | — | 0.5 | SHADOW8-B-5 | — | — | — |
| 89 | Injector 2 (N31) | — | W33 | — | 0.5 | SHADOW8-B-3 | — | — | — |
| 9 | Secondary-air injection valve (N112) | — | W56 | — | 0.5 | SHADOW8-B-8 | — | — | — |
| 90 | Crank position sensor ground (G28) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 91 | Throttle position sensor ground (G187/G188) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 92 | Throttle position sensor 2 (G188) | — | W44 | — | 0.5 | SHADOW8-A-18 | — | — | — |
| 93 | Engine coolant temperature (G62) | — | W45 | — | 0.5 | SHADOW8-A-19 | — | — | — |
| 94 | Ignition coil 4 (N163) | — | W31 | — | 0.5 | SHADOW8-B-30 | — | — | — |
| 95 | Ignition coil 2 (N128) | — | W29 | — | 0.5 | SHADOW8-B-28 | — | — | — |
| 96 | Injector 1 (N30) | — | W32 | — | 0.5 | SHADOW8-B-2 | — | — | — |
| 97 | Injector 3 (N32) | — | W34 | — | 0.5 | SHADOW8-B-4 | — | — | — |
| 98 | Cam + boost sensor 5V supply (G40/G31) | — | W21 | — | 0.5 | SP-5V1-1 | — | — | — |
| 99 | Knock sensor 5V supply (G61/G66) | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
SHADOW8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | 8.0V sensor supply | — | — | — | — | — | — | — | — |
| 3 | 5.0V sensor supply | — | W23 | — | 0.5 | SP-5V1-1 | — | — | — |
| 4 | 0V analog reference | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Crank position sensor | — | W24 | — | 0.5 | OEM-T121-82 | — | — | — |
| 6 | Sync position sensor | — | W25 | — | 0.5 | OEM-T121-86 | — | — | — |
| 7 | Trigger ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Shield | — | — | — | — | — | — | — | — |
| 9 | Ground 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Analog voltage 1 | — | W39 | — | 0.5 | OEM-T121-53 | — | — | — |
| 11 | Analog voltage 2 | — | W40 | — | 0.5 | OEM-T121-101 | — | — | — |
| 12 | Analog voltage 3 | — | W41 | — | 0.5 | OEM-T121-33 | — | — | — |
| 13 | Analog voltage 4 | — | W42 | — | 0.5 | OEM-T121-84 | — | — | — |
| 14 | Analog voltage 5 | — | W43 | — | 0.5 | OEM-T121-35 | — | — | — |
| 15 | CAN bus 1 high | — | W61 | — | 0.5 | OEM-T121-60 | — | — | — |
| 16 | Knock 1 + | — | W26 | — | 0.5 | OEM-T121-106 | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | Analog voltage 6 | — | W44 | — | 0.5 | OEM-T121-92 | — | — | — |
| 19 | Analog voltage 7 (switchable 1k pull-up) | — | W45 | — | 0.5 | OEM-T121-93 | — | — | — |
| 20 | Analog voltage 8 (switchable 1k pull-up) | — | W57 | — | 0.5 | OEM-T121-68 | — | — | — |
| 21 | Analog voltage 9 (switchable 1k pull-up) | — | W58 | — | 0.5 | OEM-T121-69 | — | — | — |
| 22 | Analog voltage 10 (switchable 1k pull-up) | — | W59 | — | 0.5 | OEM-T121-85 | — | — | — |
| 23 | CAN bus 1 low | — | W62 | — | 0.5 | OEM-T121-58 | — | — | — |
| 24 | Knock 2 + | — | W27 | — | 0.5 | OEM-T121-107 | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | Digital input 1 | — | W60 | — | 0.5 | OEM-T121-54 | — | — | — |
| 27 | Digital input 2 | — | — | — | — | — | — | — | — |
| 28 | Digital input 3 | — | — | — | — | — | — | — | — |
| 29 | Digital input 4 | — | — | — | — | — | — | — | — |
| 30 | Digital input 5 | — | — | — | — | — | — | — | — |
| 31 | Digital input 6 | — | — | — | — | — | — | — | — |
| 32 | CAN bus 2 high | — | — | — | — | — | — | — | — |
| 33 | CAN bus 2 low | — | — | — | — | — | — | — | — |
| 34 | Ground 2 | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
SHADOW8-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (HOT) supply | — | W5 | — | 0.85 | OEM-T121-62 | — | — | — |
| 2 | Injector cylinder 1 | — | W32 | — | 0.5 | OEM-T121-96 | — | — | — |
| 3 | Injector cylinder 2 | — | W33 | — | 0.5 | OEM-T121-89 | — | — | — |
| 4 | Injector cylinder 3 | — | W34 | — | 0.5 | OEM-T121-97 | — | — | — |
| 5 | Injector cylinder 4 | — | W35 | — | 0.5 | OEM-T121-88 | — | — | — |
| 6 | Injector cylinder 5 | — | W54 | — | 0.5 | OEM-T121-48 | — | — | — |
| 7 | Injector cylinder 6 | — | W55 | — | 0.5 | OEM-T121-64 | — | — | — |
| 8 | Injector cylinder 7 | — | W56 | — | 0.5 | OEM-T121-9 | — | — | — |
| 9 | Injector cylinder 8 | — | — | — | — | — | — | — | — |
| 10 | Aux output 1 | — | W46 | — | 0.5 | OEM-T121-65 | — | — | — |
| 11 | Aux output 2 | — | W47 | — | 0.5 | OEM-T121-66 | — | — | — |
| 12 | Aux output 3 | — | W48 | — | 0.5 | OEM-T121-5 | — | — | — |
| 13 | Aux output 4 | — | W49 | — | 0.5 | OEM-T121-63 | — | — | — |
| 14 | Aux output 5 | — | W50 | — | 0.5 | OEM-T121-104 | — | — | — |
| 15 | Aux output 6 | — | W51 | — | 0.5 | OEM-T121-105 | — | — | — |
| 16 | Aux output 7 | — | W52 | — | 0.5 | OEM-T121-115 | — | — | — |
| 17 | Aux output 8 | — | W53 | — | 0.5 | OEM-T121-47 | — | — | — |
| 18 | Digital input 7 | — | — | — | — | — | — | — | — |
| 19 | Digital input 8 | — | — | — | — | — | — | — | — |
| 20 | Digital input 9 | — | — | — | — | — | — | — | — |
| 21 | Digital input 10 / ignition switch | — | W38 | — | 0.5 | OEM-T121-3 | — | — | — |
| 22 | Aux output 9 | — | W37 | — | 0.5 | OEM-T121-117 | — | — | — |
| 23 | Aux output 10 | — | W36 | — | 0.5 | OEM-T121-118 | — | — | — |
| 24 | Aux output 11 | — | — | — | — | — | — | — | — |
| 25 | Aux output 12 | — | — | — | — | — | — | — | — |
| 26 | Aux 9–12 power supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | Ignition TTL cylinder 1 | — | W28 | — | 0.5 | OEM-T121-102 | — | — | — |
| 28 | Ignition TTL cylinder 2 | — | W29 | — | 0.5 | OEM-T121-95 | — | — | — |
| 29 | Ignition TTL cylinder 3 | — | W30 | — | 0.5 | OEM-T121-103 | — | — | — |
| 30 | Ignition TTL cylinder 4 | — | W31 | — | 0.5 | OEM-T121-94 | — | — | — |
| 31 | Ignition TTL cylinder 5 | — | — | — | — | — | — | — | — |
| 32 | Ignition TTL cylinder 6 | — | — | — | — | — | — | — | — |
| 33 | Ignition TTL cylinder 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition TTL cylinder 8 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-T121-91 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-T121-108 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-T121-29 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-T121-34 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-T121-36 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-T121-90 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | SHADOW8-A-4 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | SHADOW8-A-7 | — | — | — |
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 | SHADOW8-A-1 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | SHADOW8-B-26 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W18 | — | 0.5 | OEM-T121-72 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-T121-73 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-T121-83 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-T121-98 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-T121-99 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | SHADOW8-A-3 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-T121-1 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-T121-2 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | SHADOW8-A-34 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | SHADOW8-A-9 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-T121-1 | ECU ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| OEM-T121-101 | Boost pressure sensor (G31) | analog_in | SHADOW8-A-11 | Analog voltage 2 | analog_in | corroborated | |
| OEM-T121-102 | Ignition coil 1 (N127) | ignition_out | SHADOW8-B-27 | Ignition TTL cylinder 1 | ignition_out | corroborated | |
| OEM-T121-103 | Ignition coil 3 (N158) | ignition_out | SHADOW8-B-29 | Ignition TTL cylinder 3 | ignition_out | corroborated | |
| OEM-T121-104 | Boost control solenoid (N75) | low_side_out | SHADOW8-B-14 | Aux output 5 | switch_out | corroborated | |
| OEM-T121-105 | Diverter valve (N249) | low_side_out | SHADOW8-B-15 | Aux output 6 | switch_out | corroborated | |
| OEM-T121-106 | Knock sensor 1 (G61) | knock_in | SHADOW8-A-16 | Knock 1 + | knock_in | corroborated | |
| OEM-T121-107 | Knock sensor 2 (G66) | knock_in | SHADOW8-A-24 | Knock 2 + | knock_in | corroborated | |
| OEM-T121-108 | Sensor ground | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-T121-115 | VVT camshaft adjustment valve (N205) | low_side_out | SHADOW8-B-16 | Aux output 7 | switch_out | corroborated | |
| OEM-T121-117 | Throttle motor G186 (+) | hbridge_out | SHADOW8-B-22 | Aux output 9 | hbridge_out | corroborated | |
| OEM-T121-118 | Throttle motor G186 (−) | hbridge_out | SHADOW8-B-23 | Aux output 10 | hbridge_out | corroborated | |
| OEM-T121-121 | ECM + coil power (J271 relay feed) | power_in | SHADOW8-A-1 + SHADOW8-B-26 | ECU supply + Aux 9–12 power supply | power_in | corroborated | |
| OEM-T121-2 | ECU ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| OEM-T121-21 | ECM power (J271 relay feed) | power_in | SHADOW8-A-1 + SHADOW8-B-26 | ECU supply + Aux 9–12 power supply | power_in | corroborated | |
| OEM-T121-27 | MAF sensor supply (G70) | power_in | — | — | — | corroborated | |
| OEM-T121-29 | MAF sensor ground (G70) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-T121-3 | Ignition switch +12V (term 15) | digital_in | SHADOW8-B-21 | Digital input 10 / ignition switch | digital_in | corroborated | |
| OEM-T121-33 | Accelerator pedal position 1 (G79) | analog_in | SHADOW8-A-12 | Analog voltage 3 | analog_in | corroborated | |
| OEM-T121-34 | Accelerator pedal position 1 ground (G79) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-T121-35 | Accelerator pedal position 2 (G185) | analog_in | SHADOW8-A-14 | Analog voltage 5 | analog_in | corroborated | |
| OEM-T121-36 | Accelerator pedal position 2 ground (G185) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | 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 | SHADOW8-B-17 | Aux output 8 | switch_out | corroborated | |
| OEM-T121-48 | EPC warning light | low_side_out | SHADOW8-B-6 | Injector cylinder 5 | injector_out | corroborated | |
| OEM-T121-5 | Wideband lambda heater (Z19) | low_side_out | SHADOW8-B-12 | Aux output 3 | low_side_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 | SHADOW8-A-10 | Analog voltage 1 | analog_in | corroborated | |
| OEM-T121-54 | Road speed signal (VSS) | digital_in | SHADOW8-A-26 | Digital input 1 | digital_in | corroborated | |
| OEM-T121-58 | CAN bus low | can_l | SHADOW8-A-23 | CAN bus 1 low | can_l | corroborated | |
| OEM-T121-60 | CAN bus high | can_h | SHADOW8-A-15 | CAN bus 1 high | can_h | corroborated | |
| OEM-T121-62 | Battery constant +12V (term 30) | power_in | SHADOW8-B-1 | Battery constant (HOT) supply | power_in | corroborated | |
| OEM-T121-63 | Post-cat lambda heater (Z29) | low_side_out | SHADOW8-B-13 | Aux output 4 | low_side_out | corroborated | |
| OEM-T121-64 | EVAP canister valve (N80) | low_side_out | SHADOW8-B-7 | Injector cylinder 6 | injector_out | corroborated | |
| OEM-T121-65 | Fuel pump relay control | low_side_out | SHADOW8-B-10 | Aux output 1 | low_side_out | corroborated | |
| OEM-T121-66 | Secondary-air pump relay (J299) | low_side_out | SHADOW8-B-11 | Aux output 2 | low_side_out | corroborated | |
| OEM-T121-68 | Post-cat lambda signal (G130) | lambda_nb_in | SHADOW8-A-20 | Analog voltage 8 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-T121-69 | Post-cat lambda signal (G130) | lambda_nb_in | SHADOW8-A-21 | Analog voltage 9 (switchable 1k pull-up) | 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 | SHADOW8-A-3 | 5.0V sensor supply | vref | corroborated | |
| OEM-T121-73 | Accelerator pedal position 2 5V supply (G185) | vref | SHADOW8-A-3 | 5.0V sensor supply | vref | corroborated | |
| OEM-T121-82 | Crank position sensor (G28) | trigger_in | SHADOW8-A-5 | Crank position sensor | trigger_in | corroborated | |
| OEM-T121-83 | Throttle position sensor 5V supply (G187/G188) | vref | SHADOW8-A-3 | 5.0V sensor supply | vref | corroborated | |
| OEM-T121-84 | Throttle position sensor 1 (G187) | analog_in | SHADOW8-A-13 | Analog voltage 4 | analog_in | corroborated | |
| OEM-T121-85 | Intake air temperature (G42) | temp_in | SHADOW8-A-22 | Analog voltage 10 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-T121-86 | Camshaft position sensor (G40) | trigger_in | SHADOW8-A-6 | Sync position sensor | trigger_in | corroborated | |
| OEM-T121-88 | Injector 4 (N33) | injector_out | SHADOW8-B-5 | Injector cylinder 4 | injector_out | corroborated | |
| OEM-T121-89 | Injector 2 (N31) | injector_out | SHADOW8-B-3 | Injector cylinder 2 | injector_out | corroborated | |
| OEM-T121-9 | Secondary-air injection valve (N112) | low_side_out | SHADOW8-B-8 | Injector cylinder 7 | injector_out | corroborated | |
| OEM-T121-90 | Crank position sensor ground (G28) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-T121-91 | Throttle position sensor ground (G187/G188) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-T121-92 | Throttle position sensor 2 (G188) | analog_in | SHADOW8-A-18 | Analog voltage 6 | analog_in | corroborated | |
| OEM-T121-93 | Engine coolant temperature (G62) | temp_in | SHADOW8-A-19 | Analog voltage 7 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-T121-94 | Ignition coil 4 (N163) | ignition_out | SHADOW8-B-30 | Ignition TTL cylinder 4 | ignition_out | corroborated | |
| OEM-T121-95 | Ignition coil 2 (N128) | ignition_out | SHADOW8-B-28 | Ignition TTL cylinder 2 | ignition_out | corroborated | |
| OEM-T121-96 | Injector 1 (N30) | injector_out | SHADOW8-B-2 | Injector cylinder 1 | injector_out | corroborated | |
| OEM-T121-97 | Injector 3 (N32) | injector_out | SHADOW8-B-4 | Injector cylinder 3 | injector_out | corroborated | |
| OEM-T121-98 | Cam + boost sensor 5V supply (G40/G31) | vref | SHADOW8-A-3 | 5.0V sensor supply | vref | corroborated | |
| OEM-T121-99 | Knock sensor 5V supply (G61/G66) | vref | SHADOW8-A-3 | 5.0V sensor supply | 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 | SHADOW8-A-1 | 0.85 | no route | ECU supply | — | |
| W4 | SP-14V-1 | SHADOW8-B-26 | 0.85 | no route | Aux 9–12 power supply | — | |
| W5 | OEM-T121-62 | SHADOW8-B-1 | 0.85 | no route | Battery constant +12V (term 30) | — | |
| W6 | OEM-T121-1 | SP-GND-1 | 0.85 | no route | ECU ground | — | |
| W7 | OEM-T121-2 | SP-GND-1 | 0.85 | no route | ECU ground | — | |
| W8 | SP-GND-1 | SHADOW8-A-34 | 0.85 | no route | Ground 2 | — | |
| W9 | SP-GND-1 | SHADOW8-A-9 | 0.85 | no route | Ground 1 | — | |
| W10 | OEM-T121-108 | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W11 | OEM-T121-29 | SP-0V-1 | 0.5 | no route | MAF sensor ground (G70) | — | |
| W12 | OEM-T121-34 | SP-0V-1 | 0.5 | no route | Accelerator pedal position 1 ground (G79) | — | |
| W13 | OEM-T121-36 | SP-0V-1 | 0.5 | no route | Accelerator pedal position 2 ground (G185) | — | |
| W14 | OEM-T121-90 | SP-0V-1 | 0.5 | no route | Crank position sensor ground (G28) | — | |
| W15 | OEM-T121-91 | SP-0V-1 | 0.5 | no route | Throttle position sensor ground (G187/G188) | — | |
| W16 | SP-0V-1 | SHADOW8-A-4 | 0.5 | no route | 0V analog reference | — | |
| W17 | SP-0V-1 | SHADOW8-A-7 | 0.5 | no route | Trigger ground | — | |
| W18 | OEM-T121-72 | SP-5V1-1 | 0.5 | no route | Accelerator pedal position 1 5V supply (G79) | — | |
| W19 | OEM-T121-73 | SP-5V1-1 | 0.5 | no route | Accelerator pedal position 2 5V supply (G185) | — | |
| W20 | OEM-T121-83 | SP-5V1-1 | 0.5 | no route | Throttle position sensor 5V supply (G187/G188) | — | |
| W21 | OEM-T121-98 | SP-5V1-1 | 0.5 | no route | Cam + boost sensor 5V supply (G40/G31) | — | |
| W22 | OEM-T121-99 | SP-5V1-1 | 0.5 | no route | Knock sensor 5V supply (G61/G66) | — | |
| W23 | SP-5V1-1 | SHADOW8-A-3 | 0.5 | no route | 5.0V sensor supply | — | |
| W24 | OEM-T121-82 | SHADOW8-A-5 | 0.5 | no route | Crank position sensor (G28) | — | |
| W25 | OEM-T121-86 | SHADOW8-A-6 | 0.5 | no route | Camshaft position sensor (G40) | — | |
| W26 | OEM-T121-106 | SHADOW8-A-16 | 0.5 | no route | Knock sensor 1 (G61) | — | |
| W27 | OEM-T121-107 | SHADOW8-A-24 | 0.5 | no route | Knock sensor 2 (G66) | — | |
| W28 | OEM-T121-102 | SHADOW8-B-27 | 0.5 | no route | Ignition coil 1 (N127) | — | |
| W29 | OEM-T121-95 | SHADOW8-B-28 | 0.5 | no route | Ignition coil 2 (N128) | — | |
| W30 | OEM-T121-103 | SHADOW8-B-29 | 0.5 | no route | Ignition coil 3 (N158) | — | |
| W31 | OEM-T121-94 | SHADOW8-B-30 | 0.5 | no route | Ignition coil 4 (N163) | — | |
| W32 | OEM-T121-96 | SHADOW8-B-2 | 0.5 | no route | Injector 1 (N30) | — | |
| W33 | OEM-T121-89 | SHADOW8-B-3 | 0.5 | no route | Injector 2 (N31) | — | |
| W34 | OEM-T121-97 | SHADOW8-B-4 | 0.5 | no route | Injector 3 (N32) | — | |
| W35 | OEM-T121-88 | SHADOW8-B-5 | 0.5 | no route | Injector 4 (N33) | — | |
| W36 | OEM-T121-118 | SHADOW8-B-23 | 0.5 | no route | Throttle motor G186 (−) | — | |
| W37 | OEM-T121-117 | SHADOW8-B-22 | 0.5 | no route | Throttle motor G186 (+) | — | |
| W38 | OEM-T121-3 | SHADOW8-B-21 | 0.5 | no route | Ignition switch +12V (term 15) | — | |
| W39 | OEM-T121-53 | SHADOW8-A-10 | 0.5 | no route | MAF sensor signal (G70) | — | |
| W40 | OEM-T121-101 | SHADOW8-A-11 | 0.5 | no route | Boost pressure sensor (G31) | — | |
| W41 | OEM-T121-33 | SHADOW8-A-12 | 0.5 | no route | Accelerator pedal position 1 (G79) | — | |
| W42 | OEM-T121-84 | SHADOW8-A-13 | 0.5 | no route | Throttle position sensor 1 (G187) | — | |
| W43 | OEM-T121-35 | SHADOW8-A-14 | 0.5 | no route | Accelerator pedal position 2 (G185) | — | |
| W44 | OEM-T121-92 | SHADOW8-A-18 | 0.5 | no route | Throttle position sensor 2 (G188) | — | |
| W45 | OEM-T121-93 | SHADOW8-A-19 | 0.5 | no route | Engine coolant temperature (G62) | — | |
| W46 | OEM-T121-65 | SHADOW8-B-10 | 0.5 | no route | Fuel pump relay control | — | |
| W47 | OEM-T121-66 | SHADOW8-B-11 | 0.5 | no route | Secondary-air pump relay (J299) | — | |
| W48 | OEM-T121-5 | SHADOW8-B-12 | 0.5 | no route | Wideband lambda heater (Z19) | — | |
| W49 | OEM-T121-63 | SHADOW8-B-13 | 0.5 | no route | Post-cat lambda heater (Z29) | — | |
| W50 | OEM-T121-104 | SHADOW8-B-14 | 0.5 | no route | Boost control solenoid (N75) | — | |
| W51 | OEM-T121-105 | SHADOW8-B-15 | 0.5 | no route | Diverter valve (N249) | — | |
| W52 | OEM-T121-115 | SHADOW8-B-16 | 0.5 | no route | VVT camshaft adjustment valve (N205) | — | |
| W53 | OEM-T121-47 | SHADOW8-B-17 | 0.5 | no route | Check engine light (MIL) | — | |
| W54 | OEM-T121-48 | SHADOW8-B-6 | 0.5 | no route | EPC warning light | — | |
| W55 | OEM-T121-64 | SHADOW8-B-7 | 0.5 | no route | EVAP canister valve (N80) | — | |
| W56 | OEM-T121-9 | SHADOW8-B-8 | 0.5 | no route | Secondary-air injection valve (N112) | — | |
| W57 | OEM-T121-68 | SHADOW8-A-20 | 0.5 | no route | Post-cat lambda signal (G130) | — | |
| W58 | OEM-T121-69 | SHADOW8-A-21 | 0.5 | no route | Post-cat lambda signal (G130) | — | |
| W59 | OEM-T121-85 | SHADOW8-A-22 | 0.5 | no route | Intake air temperature (G42) | — | |
| W60 | OEM-T121-54 | SHADOW8-A-26 | 0.5 | no route | Road speed signal (VSS) | — | |
| W61 | OEM-T121-60 | SHADOW8-A-15 | 0.5 | no route | CAN bus high | — | |
| W62 | OEM-T121-58 | SHADOW8-A-23 | 0.5 | no route | CAN bus low | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | 4-1437290-1 | TE | Superseal 1.0 34-way plug, Key 2 | 1.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 47.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (15)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | DBW_MOTOR_CURRENT | SHADOW8-B-22 | Cannot confirm Shadow 8 can drive the throttle motor: SHADOW8-B-22 "Aux output 9" is rated 8.0 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_MOTOR_CURRENT | SHADOW8-B-23 | Cannot confirm Shadow 8 can drive the throttle motor: SHADOW8-B-23 "Aux output 10" is rated 8.0 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_ISOLATION | SHADOW8-B-26 | SHADOW8-B-26 "Aux 9–12 power supply" is fed from the same net as the ECU main supply (SHADOW8-A-1). Link's S2000 DBW wiring feeds the throttle-motor supply through a separate isolation relay switched by the ECU, so motor power can be cut on a throttle fault. Add one, or confirm Shadow 8 cuts the H-bridge internally. |
| warn | DBW_SHARED_5V | OEM-T121-72 + OEM-T121-73 + OEM-T121-83 + OEM-T121-98 + OEM-T121-99 + SHADOW8-A-3 + SP-5V1-1 | These 5 V supplies are separate in the stock car (OEM-T121-72 [pedal1], OEM-T121-73 [pedal2], OEM-T121-83 [tps], OEM-T121-98 [cam_boost], OEM-T121-99 [knock]) and here share one ECU 5 V (SHADOW8-A-3). On a drive-by-wire car the OEM splits them so one short or fault can't corrupt both throttle/pedal tracks at once. Shadow 8 has 1 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 | SUPPLY_GROUP | OEM-T121-72 + OEM-T121-73 + OEM-T121-83 + OEM-T121-98 + OEM-T121-99 + SHADOW8-A-3 + SP-5V1-1 | Supplies meant to stay independent share one net: OEM-T121-72 [pedal1], OEM-T121-73 [pedal2], OEM-T121-83 [tps], OEM-T121-98 [cam_boost], 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. |
| info | NET_FAMILY | OEM-T121-104 ↔ SHADOW8-B-14 | OEM-T121-104 "Boost control solenoid (N75)" [low_side_out] is wired to SHADOW8-B-14 "Aux output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-T121-105 ↔ SHADOW8-B-15 | OEM-T121-105 "Diverter valve (N249)" [low_side_out] is wired to SHADOW8-B-15 "Aux output 6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-T121-115 ↔ SHADOW8-B-16 | OEM-T121-115 "VVT camshaft adjustment valve (N205)" [low_side_out] is wired to SHADOW8-B-16 "Aux output 7" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-T121-47 ↔ SHADOW8-B-17 | OEM-T121-47 "Check engine light (MIL)" [low_side_out] is wired to SHADOW8-B-17 "Aux output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-T121-48 ↔ SHADOW8-B-6 | OEM-T121-48 "EPC warning light" [low_side_out] is wired to SHADOW8-B-6 "Injector cylinder 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-T121-64 ↔ SHADOW8-B-7 | OEM-T121-64 "EVAP canister valve (N80)" [low_side_out] is wired to SHADOW8-B-7 "Injector cylinder 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-T121-85 ↔ SHADOW8-A-22 | OEM-T121-85 "Intake air temperature (G42)" [temp_in] is wired to SHADOW8-A-22 "Analog voltage 10 (switchable 1k pull-up)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-T121-9 ↔ SHADOW8-B-8 | OEM-T121-9 "Secondary-air injection valve (N112)" [low_side_out] is wired to SHADOW8-B-8 "Injector cylinder 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-T121-93 ↔ SHADOW8-A-19 | OEM-T121-93 "Engine coolant temperature (G62)" [temp_in] is wired to SHADOW8-A-19 "Analog voltage 7 (switchable 1k pull-up)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | UNMAPPED | OEM | 7 optional OEM pins are not mapped: 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-T121-51 Wideband lambda pump (G39); OEM-T121-52 Wideband lambda pump (G39); OEM-T121-70 Wideband lambda Nernst signal (G39); OEM-T121-71 Wideband lambda Nernst signal (G39) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for VW EA113 not found in the ECU's docs (No VW 1.8T 20v (EA113) decoder.) - This car has VW/Audi Immobilizer (delete/bypass for standalone) immobilizer; needs a delete/bypass Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Not wired: - SHADOW8-A 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - SHADOW8-A 25: Knock 2 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-T121 37: Engine speed signal (tacho to cluster): no free tacho/frequency_out/low_side/ls_hs on Emtron Shadow 8 - OEM-T121 51: Wideband lambda pump (G39): no free wb_ip on Emtron Shadow 8 - OEM-T121 52: Wideband lambda pump (G39): no free wb_ip on Emtron Shadow 8 - OEM-T121 70: Wideband lambda Nernst signal (G39): no free wb_vs on Emtron Shadow 8 - OEM-T121 71: Wideband lambda Nernst signal (G39): no free wb_vs on Emtron Shadow 8 - OEM-T121 43: K-line diagnostics (OBD pin 7): no free k_line on Emtron Shadow 8 - 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 | Emtron Shadow 8 ECU datasheet | https://docs.emtronaustralia.com.au/engine-management/datasheets/shadow-8-datasheet/index.html | archive | 2026-10-05 | f004c9a8d60c |
| 4 | vendor_doc | Emtron Shadow 8 pinout | https://docs.emtronaustralia.com.au/engine-management/wiring/shadow-8/shadow-8-pinout/index.html | archive | 2026-10-05 | f510053951c7 |
| 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 | — | — | — |