VW Golf/Jetta Mk2 1.8 8v Digifant II → Emtron KV8 (auto)
VW Golf/Jetta Mk2 1.8 8v Digifant II — Emtron — KV8
⚠ 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 | 32 wires · 9 connectors · 5 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-A-14 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | KV8-D-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | KV8-D-2 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | KV8-D-20 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-13 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-19 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | KV8-B-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | KV8-B-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | KV8-C-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | KV8-C-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-A-5 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-A-6 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | KV8-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | KV8-C-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-17 | KV8-D-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A-18 | KV8-D-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | KV8-D-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-A-4 | KV8-D-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-A-25 | KV8-B-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-A-12 | KV8-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-A-7 | SP-SHD-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | SP-SHD-1 | KV8-D-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-A-3 | KV8-D-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-21 | KV8-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-10 | KV8-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-22 | KV8-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-23 | KV8-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-2 | KV8-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-9 | KV8-C-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-1 | KV8-C-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-11 | KV8-C-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-16 | KV8-C-29 | 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 | KV8-D-1 | KV8-C-17 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | KV8-D-21 | KV8-C-17 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 3 | KV8-B-34 | KV8-D-1 | open (OL) | power ground must not touch +12 V supply | |
| 4 | KV8-B-34 | KV8-D-21 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | KV8-D-1 | KV8-D-21 | 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
KV8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | — | — | — | — | — | — | — |
| 2 | — | — | — | — | — | — | — | — | — |
| 3 | — | — | — | — | — | — | — | — | — |
| 4 | — | — | — | — | — | — | — | — | — |
| 5 | — | — | — | — | — | — | — | — | — |
| 6 | — | — | — | — | — | — | — | — | — |
| 7 | — | — | — | — | — | — | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | — | — | — | — | — | — | — | — | — |
| 10 | Lambda 1 heater − | — | — | — | — | — | — | — | — |
| 11 | Lambda 2 heater − | — | — | — | — | — | — | — | — |
| 12 | — | — | — | — | — | — | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | — | — | — | — | — | — | — | — | — |
| 15 | — | — | — | — | — | — | — | — | — |
| 16 | Lambda 1 heater + | — | — | — | — | — | — | — | — |
| 17 | Lambda 2 heater + | — | — | — | — | — | — | — | — |
| 18 | Lambda 1 Nernst cell (Vs) | — | — | — | — | — | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | Lambda 2 cal resistor | — | — | — | — | — | — | — | — |
| 21 | Lambda 2 Nernst cell (Vs) | — | — | — | — | — | — | — | — |
| 22 | Lambda 2 pump cell (Ip) | — | — | — | — | — | — | — | — |
| 23 | Lambda 2 virtual ground | — | — | — | — | — | — | — | — |
| 24 | Lambda 1 cal resistor | — | — | — | — | — | — | — | — |
| 25 | Lambda 1 pump cell (Ip) | — | — | — | — | — | — | — | — |
| 26 | Lambda 1 virtual ground | — | — | — | — | — | — | — | — |
KV8-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injection 1 | — | W20 | — | 0.5 | OEM-A-12 | — | — | — |
| 2 | Injection 2 | — | — | — | — | — | — | — | — |
| 3 | Injection 3 | — | — | — | — | — | — | — | — |
| 4 | Injection 4 | — | — | — | — | — | — | — | — |
| 5 | Injection 5 | — | — | — | — | — | — | — | — |
| 6 | Injection 6 | — | — | — | — | — | — | — | — |
| 7 | Injection 7 | — | — | — | — | — | — | — | — |
| 8 | Injection 8 | — | — | — | — | — | — | — | — |
| 9 | ECU ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Aux 1 | — | — | — | — | — | — | — | — |
| 11 | Aux 2 | — | — | — | — | — | — | — | — |
| 12 | Aux 3 | — | — | — | — | — | — | — | — |
| 13 | Aux 4 | — | — | — | — | — | — | — | — |
| 14 | Aux 5 | — | W26 | — | 0.5 | OEM-A-22 | — | — | — |
| 15 | Aux 6 | — | W27 | — | 0.5 | OEM-A-23 | — | — | — |
| 16 | Aux 7 | — | — | — | — | — | — | — | — |
| 17 | Aux 8 | — | — | — | — | — | — | — | — |
| 18 | Aux 9 | — | — | — | — | — | — | — | — |
| 19 | Aux 10 | — | — | — | — | — | — | — | — |
| 20 | Aux 11 | — | — | — | — | — | — | — | — |
| 21 | Aux 12 | — | — | — | — | — | — | — | — |
| 22 | Aux 13 | — | — | — | — | — | — | — | — |
| 23 | Aux 14 | — | — | — | — | — | — | — | — |
| 24 | Aux 15 | — | — | — | — | — | — | — | — |
| 25 | Aux 16 | — | — | — | — | — | — | — | — |
| 26 | Ignition 1 | — | W19 | — | 0.5 | OEM-A-25 | — | — | — |
| 27 | Ignition 2 | — | — | — | — | — | — | — | — |
| 28 | Ignition 3 | — | — | — | — | — | — | — | — |
| 29 | Ignition 4 | — | — | — | — | — | — | — | — |
| 30 | Ignition 5 | — | — | — | — | — | — | — | — |
| 31 | Ignition 6 | — | — | — | — | — | — | — | — |
| 32 | Ignition 7 | — | — | — | — | — | — | — | — |
| 33 | Ignition 8 | — | — | — | — | — | — | — | — |
| 34 | ECU ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
KV8-C
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Analog in 1 | — | W24 | — | 0.5 | OEM-A-21 | — | — | — |
| 3 | Analog in 2 | — | W25 | — | 0.5 | OEM-A-10 | — | — | — |
| 4 | Analog in 3 | — | W28 | — | 0.5 | OEM-A-2 | — | — | — |
| 5 | Analog in 4 | — | W29 | — | 0.5 | OEM-A-9 | — | — | — |
| 6 | Analog in 5 | — | — | — | — | — | — | — | — |
| 7 | Analog in 6 | — | — | — | — | — | — | — | — |
| 8 | Analog in 7 | — | — | — | — | — | — | — | — |
| 9 | Analog in 8 | — | — | — | — | — | — | — | — |
| 10 | Analog in 9 | — | — | — | — | — | — | — | — |
| 11 | Analog in 10 | — | — | — | — | — | — | — | — |
| 12 | Analog in 11 | — | — | — | — | — | — | — | — |
| 13 | Analog in 12 | — | — | — | — | — | — | — | — |
| 14 | Analog in 13 | — | — | — | — | — | — | — | — |
| 15 | Analog in 14 | — | — | — | — | — | — | — | — |
| 16 | Analog in 15 | — | — | — | — | — | — | — | — |
| 17 | Analog sensor 0V reference | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 18 | Digital in 9 | — | — | — | — | — | — | — | — |
| 19 | Digital in 10 | — | — | — | — | — | — | — | — |
| 20 | Digital in 11 | — | — | — | — | — | — | — | — |
| 21 | Digital in 12 | — | — | — | — | — | — | — | — |
| 22 | Digital in 13 | — | — | — | — | — | — | — | — |
| 23 | Digital in 14 | — | — | — | — | — | — | — | — |
| 24 | Analog in 16 | — | — | — | — | — | — | — | — |
| 25 | Analog sensor 0V reference | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 26 | ECU ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 27 | Digital in 1 | — | W30 | — | 0.5 | OEM-A-1 | — | — | — |
| 28 | Digital in 2 | — | W31 | — | 0.5 | OEM-A-11 | — | — | — |
| 29 | Digital in 3 | — | W32 | — | 0.5 | OEM-A-16 | — | — | — |
| 30 | Digital in 4 | — | — | — | — | — | — | — | — |
| 31 | Digital in 5 | — | — | — | — | — | — | — | — |
| 32 | Digital in 6 | — | — | — | — | — | — | — | — |
| 33 | Digital in 7 | — | — | — | — | — | — | — | — |
| 34 | Digital in 8 | — | — | — | — | — | — | — | — |
KV8-D
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU 14V supply | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Aux 13–16 14V supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | Sensor supply 8V | — | — | — | — | — | — | — | — |
| 4 | Crank index sensor + | — | — | — | — | — | — | — | — |
| 5 | Crank index sensor − | — | — | — | — | — | — | — | — |
| 6 | Sync sensor + | — | W16 | — | 0.5 | OEM-A-18 | — | — | — |
| 7 | Sync sensor − | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | CAN 1 H | — | — | — | — | — | — | — | — |
| 9 | EFI relay output (low side, 200 mA) | — | W23 | — | 0.5 | OEM-A-3 | — | — | — |
| 10 | CAN 2 H | — | — | — | — | — | — | — | — |
| 11 | Knock 1 + | — | W18 | — | 0.5 | OEM-A-4 | — | — | — |
| 12 | Knock 1 − | — | — | — | — | — | — | — | — |
| 13 | Shield (crank/cam/knock) | — | W22 | — | 0.5 | SP-SHD-1 | — | — | — |
| 14 | CAN 1 L | — | — | — | — | — | — | — | — |
| 15 | Ignition switch input | — | — | — | — | — | — | — | — |
| 16 | CAN 2 L | — | — | — | — | — | — | — | — |
| 17 | Knock 2 + | — | — | — | — | — | — | — | — |
| 18 | Knock 2 − | — | — | — | — | — | — | — | — |
| 19 | Analog output 0–5V | — | — | — | — | — | — | — | — |
| 20 | Aux 9–12 14V supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 21 | Sensor supply Vref1 5.0V | — | W15 | — | 0.5 | OEM-A-17 | — | — | — |
| 22 | Sensor supply Vref2 5.0V | — | — | — | — | — | — | — | — |
| 23 | Ethernet Tx+ | — | — | — | — | — | — | — | — |
| 24 | Ethernet Tx− | — | — | — | — | — | — | — | — |
| 25 | Ethernet Rx+ | — | — | — | — | — | — | — | — |
| 26 | Ethernet Rx− | — | — | — | — | — | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Starter signal (term 50) | — | W30 | — | 0.5 | KV8-C-27 | — | — | — |
| 10 | Coolant temperature sensor | — | W25 | — | 0.5 | KV8-C-3 | — | — | — |
| 11 | Idle/WOT throttle switch | — | W31 | — | 0.5 | KV8-C-28 | — | — | — |
| 12 | Injector driver (batch, all 4) | — | W20 | — | 0.5 | KV8-B-1 | — | — | — |
| 13 | Ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | ECU power (control-unit relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 16 | A/C compressor signal | — | W32 | — | 0.5 | KV8-C-29 | — | — | — |
| 17 | AFM potentiometer supply | — | W15 | — | 0.5 | KV8-D-21 | — | — | — |
| 18 | Hall sender signal (engine speed) | — | W16 | — | 0.5 | KV8-D-6 | — | — | — |
| 19 | Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | Oxygen (lambda) sensor signal | — | W28 | — | 0.5 | KV8-C-4 | — | — | — |
| 21 | AFM signal | — | W24 | — | 0.5 | KV8-C-2 | — | — | — |
| 22 | Idle stabilizer valve coil 1 | — | W26 | — | 0.5 | KV8-B-14 | — | — | — |
| 23 | Idle stabilizer valve coil 2 | — | W27 | — | 0.5 | KV8-B-15 | — | — | — |
| 25 | Ignition timing signal to TCI | — | W19 | — | 0.5 | KV8-B-26 | — | — | — |
| 3 | Fuel pump relay control | — | W23 | — | 0.5 | KV8-D-9 | — | — | — |
| 4 | Knock sensor signal | — | W18 | — | 0.5 | KV8-D-11 | — | — | — |
| 5 | Knock sensor return | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 6 | Sensor ground (CTS/Hall/AFM/throttle) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | Knock sensor shield | — | W21 | — | 0.5 | SP-SHD-1 | — | — | — |
| 8 | Hall sender supply (distributor) | — | — | — | — | — | — | — | — |
| 9 | Intake air temperature sensor | — | W29 | — | 0.5 | KV8-C-5 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-A-5 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-A-6 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | KV8-C-17 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | KV8-C-25 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | KV8-D-7 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-14 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | KV8-D-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | KV8-D-2 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | KV8-D-20 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A-13 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-19 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | KV8-B-34 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | KV8-B-9 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | KV8-C-1 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | KV8-C-26 | — | — | — |
SP-SHD
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W21 | — | 0.5 | OEM-A-7 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | KV8-D-13 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Starter signal (term 50) | digital_in | KV8-C-27 | Digital in 1 | digital_in | corroborated | |
| OEM-A-10 | Coolant temperature sensor | temp_in | KV8-C-3 | Analog in 2 | analog_in | corroborated | |
| OEM-A-11 | Idle/WOT throttle switch | digital_in | KV8-C-28 | Digital in 2 | digital_in | corroborated | |
| OEM-A-12 | Injector driver (batch, all 4) | injector_out | KV8-B-1 | Injection 1 | injector_out | corroborated | |
| OEM-A-13 | Ground | ground | KV8-B-34 + KV8-B-9 + KV8-C-1 + KV8-C-26 | ECU ground + ECU ground + ECU ground + ECU ground | ground | corroborated | |
| OEM-A-14 | ECU power (control-unit relay) | power_in | KV8-D-1 + KV8-D-2 + KV8-D-20 | ECU 14V supply + Aux 13–16 14V supply + Aux 9–12 14V supply | power_in | corroborated | |
| OEM-A-16 | A/C compressor signal | digital_in | KV8-C-29 | Digital in 3 | digital_in | corroborated | |
| OEM-A-17 | AFM potentiometer supply | vref | KV8-D-21 | Sensor supply Vref1 5.0V | vref | corroborated | |
| OEM-A-18 | Hall sender signal (engine speed) | trigger_in | KV8-D-6 | Sync sensor + | trigger_in | corroborated | |
| OEM-A-19 | Ground | ground | KV8-B-34 + KV8-B-9 + KV8-C-1 + KV8-C-26 | ECU ground + ECU ground + ECU ground + ECU ground | ground | corroborated | |
| OEM-A-2 | Oxygen (lambda) sensor signal | lambda_nb_in | KV8-C-4 | Analog in 3 | analog_in | corroborated | |
| OEM-A-21 | AFM signal | analog_in | KV8-C-2 | Analog in 1 | analog_in | corroborated | |
| OEM-A-22 | Idle stabilizer valve coil 1 | low_side_out | KV8-B-14 | Aux 5 | low_side_out | corroborated | |
| OEM-A-23 | Idle stabilizer valve coil 2 | low_side_out | KV8-B-15 | Aux 6 | low_side_out | corroborated | |
| OEM-A-25 | Ignition timing signal to TCI | ignition_out | KV8-B-26 | Ignition 1 | ignition_out | corroborated | |
| OEM-A-3 | Fuel pump relay control | low_side_out | KV8-D-9 | EFI relay output (low side, 200 mA) | low_side_out | corroborated | |
| OEM-A-4 | Knock sensor signal | knock_in | KV8-D-11 | Knock 1 + | knock_in | corroborated | |
| OEM-A-5 | Knock sensor return | sensor_ground | KV8-C-17 + KV8-C-25 + KV8-D-7 | Analog sensor 0V reference + Analog sensor 0V reference + Sync sensor − | sensor_ground + trigger_in | corroborated | |
| OEM-A-6 | Sensor ground (CTS/Hall/AFM/throttle) | sensor_ground | KV8-C-17 + KV8-C-25 + KV8-D-7 | Analog sensor 0V reference + Analog sensor 0V reference + Sync sensor − | sensor_ground + trigger_in | corroborated | |
| OEM-A-7 | Knock sensor shield | shield | KV8-D-13 | Shield (crank/cam/knock) | shield | corroborated | |
| OEM-A-8 | Hall sender supply (distributor) | power_in | — | — | — | corroborated | |
| OEM-A-9 | Intake air temperature sensor | temp_in | KV8-C-5 | Analog in 4 | analog_in | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-14 | SP-14V-1 | 0.85 | no route | ECU power (control-unit relay) | — | |
| W2 | SP-14V-1 | KV8-D-1 | 0.85 | no route | ECU 14V supply | — | |
| W3 | SP-14V-1 | KV8-D-2 | 0.85 | no route | Aux 13–16 14V supply | — | |
| W4 | SP-14V-1 | KV8-D-20 | 0.85 | no route | Aux 9–12 14V supply | — | |
| W5 | OEM-A-13 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W6 | OEM-A-19 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W7 | SP-GND-1 | KV8-B-34 | 0.85 | no route | ECU ground | — | |
| W8 | SP-GND-1 | KV8-B-9 | 0.85 | no route | ECU ground | — | |
| W9 | SP-GND-1 | KV8-C-1 | 0.85 | no route | ECU ground | — | |
| W10 | SP-GND-1 | KV8-C-26 | 0.85 | no route | ECU ground | — | |
| W11 | OEM-A-5 | SP-0V-1 | 0.5 | no route | Knock sensor return | — | |
| W12 | OEM-A-6 | SP-0V-1 | 0.5 | no route | Sensor ground (CTS/Hall/AFM/throttle) | — | |
| W13 | SP-0V-1 | KV8-C-17 | 0.5 | no route | Analog sensor 0V reference | — | |
| W14 | SP-0V-1 | KV8-C-25 | 0.5 | no route | Analog sensor 0V reference | — | |
| W15 | OEM-A-17 | KV8-D-21 | 0.5 | no route | AFM potentiometer supply | — | |
| W16 | OEM-A-18 | KV8-D-6 | 0.5 | no route | Hall sender signal (engine speed) | — | |
| W17 | SP-0V-1 | KV8-D-7 | 0.5 | no route | Sync sensor − | — | |
| W18 | OEM-A-4 | KV8-D-11 | 0.5 | no route | Knock sensor signal | — | |
| W19 | OEM-A-25 | KV8-B-26 | 0.5 | no route | Ignition timing signal to TCI | — | |
| W20 | OEM-A-12 | KV8-B-1 | 0.5 | no route | Injector driver (batch, all 4) | — | |
| W21 | OEM-A-7 | SP-SHD-1 | 0.5 | no route | Knock sensor shield | — | |
| W22 | SP-SHD-1 | KV8-D-13 | 0.5 | no route | Shield (crank/cam/knock) | — | |
| W23 | OEM-A-3 | KV8-D-9 | 0.5 | no route | Fuel pump relay control | — | |
| W24 | OEM-A-21 | KV8-C-2 | 0.5 | no route | AFM signal | — | |
| W25 | OEM-A-10 | KV8-C-3 | 0.5 | no route | Coolant temperature sensor | — | |
| W26 | OEM-A-22 | KV8-B-14 | 0.5 | no route | Idle stabilizer valve coil 1 | — | |
| W27 | OEM-A-23 | KV8-B-15 | 0.5 | no route | Idle stabilizer valve coil 2 | — | |
| W28 | OEM-A-2 | KV8-C-4 | 0.5 | no route | Oxygen (lambda) sensor signal | — | |
| W29 | OEM-A-9 | KV8-C-5 | 0.5 | no route | Intake air temperature sensor | — | |
| W30 | OEM-A-1 | KV8-C-27 | 0.5 | no route | Starter signal (term 50) | — | |
| W31 | OEM-A-11 | KV8-C-28 | 0.5 | no route | Idle/WOT throttle switch | — | |
| W32 | OEM-A-16 | KV8-C-29 | 0.5 | no route | A/C compressor signal | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 3-1437290-7 | TE | Superseal 1.0 26-way plug | 1.000 | ea |
| connector | 3-1437290-8 | TE | Superseal 1.0 26-way plug, Key 2 | 1.000 | ea |
| 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) | 26.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (5)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-A-8 | Required OEM function "Hall sender supply (distributor)" (power_in) is not connected to the new ECU. |
| warn | DATASET_GAP | KV8 A | 14 of 26 cavities on KV8 A have no pin data (1,2,3,4,5,6,7,8,9,12,13,14,15,19). Anything there is invisible to these checks. |
| info | NET_FAMILY | OEM-A-10 ↔ KV8-C-3 | OEM-A-10 "Coolant temperature sensor" [temp_in] is wired to KV8-C-3 "Analog in 2" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-A-6 ↔ KV8-D-7 | OEM-A-6 "Sensor ground (CTS/Hall/AFM/throttle)" [sensor_ground] is wired to KV8-D-7 "Sync sensor −" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-A-9 ↔ KV8-C-5 | OEM-A-9 "Intake air temperature sensor" [temp_in] is wired to KV8-C-5 "Analog in 4" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for VW Digifant not found in the ECU's docs (No VW/Audi decoder anywhere in the mode list.) 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-A 8: Hall sender supply (distributor): no rule for class sensor_supply_in; wire by hand Not wired: - KV8-D 12: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - KV8-D 15: Ignition switch input: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 2 | user_dataset | Subaru ECU Matcher dataset (hiubin), vehicleId=1 | — | — | — | — |
| 2 | community_copy | a2resource: Digifant II engine controller pinout (VW Golf/Jetta Mk2 1.8 8v) | http://www.a2resource.com/electrical/management/digifant2.html | — | — | — |
| 2 | community_copy | drive2.ru: VW Golf Mk2 PF Digifant II ECU pinout | https://www.drive2.ru/l/9886121 | — | — | — |