AP1 2000–03 (F20C) → Link G4X AtomX 111-4000 (auto)
AP1 2000–03 (F20C) — Link — G4X AtomX
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-08
Before you start
| 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 | 40 wires · 9 connectors · 4 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-B-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-B-9 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | G4XATOMX-A-A5 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-B-10 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-B-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-B-20 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B-22 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | G4XATOMX-A-A25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | G4XATOMX-A-A34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-C-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-C-30 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C-31 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-C-7 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | G4XATOMX-A-A24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-C-19 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-C-28 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-5V1-1 | G4XATOMX-A-A32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-8 | G4XATOMX-A-A8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-20 | G4XATOMX-A-A9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-29 | G4XATOMX-A-A30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-4 | G4XATOMX-A-A13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-12 | G4XATOMX-A-A12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-C-13 | G4XATOMX-A-A11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-C-14 | G4XATOMX-A-A10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-B-11 | G4XATOMX-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-B-3 | G4XATOMX-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-4 | G4XATOMX-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B-5 | G4XATOMX-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-15 | G4XATOMX-A-A21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-16 | G4XATOMX-A-A20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-17 | G4XATOMX-A-A19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-20 | G4XATOMX-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-C-17 | G4XATOMX-A-A17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-C-27 | G4XATOMX-A-A22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-23 | G4XATOMX-A-A33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-C-26 | G4XATOMX-A-A15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-C-25 | G4XATOMX-A-A16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-9 | G4XATOMX-A-A31 | 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 | G4XATOMX-A-A5 | G4XATOMX-A-A24 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | G4XATOMX-A-A5 | G4XATOMX-A-A25 | open (OL) | +12 V supply must not touch power ground | |
| 3 | G4XATOMX-A-A24 | G4XATOMX-A-A32 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | G4XATOMX-A-A25 | G4XATOMX-A-A32 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | G4XATOMX-A-A5 | G4XATOMX-A-A32 | open (OL) | +12 V supply must not touch 5 V sensor reference |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
G4XATOMX-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | Injector 4 | — | W30 | — | 0.5 | OEM-B-5 | — | — | — |
| A10 | Ignition 4 | — | W26 | — | 0.5 | OEM-C-14 | — | — | — |
| A11 | Ignition 3 | — | W25 | — | 0.5 | OEM-C-13 | — | — | — |
| A12 | Ignition 2 | — | W24 | — | 0.5 | OEM-C-12 | — | — | — |
| A13 | Ignition 1 | — | W23 | — | 0.5 | OEM-C-4 | — | — | — |
| A15 | Analog Temp 1 | — | W38 | — | 0.5 | OEM-C-26 | — | — | — |
| A16 | Analog Temp 2 | — | W39 | — | 0.5 | OEM-C-25 | — | — | — |
| A17 | Analog Volt 1 | — | W35 | — | 0.5 | OEM-C-17 | — | — | — |
| A18 | Aux 4 | — | W34 | — | 0.5 | OEM-A-20 | — | — | — |
| A19 | Aux 3 | — | W33 | — | 0.5 | OEM-A-17 | — | — | — |
| A2 | Injector 3 | — | W29 | — | 0.5 | OEM-B-4 | — | — | — |
| A20 | Aux 2 | — | W32 | — | 0.5 | OEM-A-16 | — | — | — |
| A21 | Aux 1 | — | W31 | — | 0.5 | OEM-A-15 | — | — | — |
| A22 | Analog Volt 2 | — | W36 | — | 0.5 | OEM-C-27 | — | — | — |
| A24 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| A25 | System Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| A28 | CAN H | — | — | — | — | — | — | — | — |
| A29 | CAN L | — | — | — | — | — | — | — | — |
| A3 | Injector 2 | — | W28 | — | 0.5 | OEM-B-3 | — | — | — |
| A30 | Digital Input 1 | — | W22 | — | 0.5 | OEM-C-29 | — | — | — |
| A31 | Digital Input 2 | — | W40 | — | 0.5 | OEM-A-9 | — | — | — |
| A32 | +5V Out | — | W17 | — | 0.5 | SP-5V1-1 | — | — | — |
| A33 | Analog Volt 3 | — | W37 | — | 0.5 | OEM-A-23 | — | — | — |
| A34 | System Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| A4 | Injector 1 | — | W27 | — | 0.5 | OEM-B-11 | — | — | — |
| A5 | +14V ECU Power | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| A6 | Knock 1 | — | — | — | — | — | — | — | — |
| A7 | Shield Ground | — | — | — | — | — | — | — | — |
| A8 | Trigger 1 | — | W18 | — | 0.5 | OEM-C-8 | — | — | — |
| A9 | Trigger 2 | — | W20 | — | 0.5 | OEM-C-20 | — | — | — |
OEM-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coolant temp gauge drive | — | — | — | — | — | — | — | — |
| 2 | Air control valve solenoid | — | — | — | — | — | — | — | — |
| 3 | Evap bypass solenoid | — | — | — | — | — | — | — | — |
| 4 | Evap canister vent shut valve | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | Evap canister purge valve | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Vehicle speed sensor | — | W40 | — | 0.5 | G4XATOMX-A-A31 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | — | — | — | — | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W31 | — | 0.5 | G4XATOMX-A-A21 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | W32 | — | 0.5 | G4XATOMX-A-A20 | — | — | — |
| 17 | A/C clutch relay | — | W33 | — | 0.5 | G4XATOMX-A-A19 | — | — | — |
| 18 | Check engine light (MIL) | — | — | — | — | — | — | — | — |
| 19 | Tacho output | — | — | — | — | — | — | — | — |
| 20 | Radiator fan relay | — | W34 | — | 0.5 | G4XATOMX-A-A18 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | W37 | — | 0.5 | G4XATOMX-A-A33 | — | — | — |
| 24 | Starter switch signal | — | — | — | — | — | — | — | — |
| 25 | Immobilizer code | — | — | — | — | — | — | — | — |
| 26 | Power steering load detect | — | — | — | — | — | — | — | — |
| 27 | A/C switch (request) | — | — | — | — | — | — | — | — |
| 28 | Air pump relay | — | — | — | — | — | — | — | — |
| 29 | Fuel tank pressure sensor | — | — | — | — | — | — | — | — |
| 30 | Electrical load detector | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | Brake switch | — | — | — | — | — | — | — | — |
OEM-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Power source 1 (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Power ground 1 | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Injector 2 | — | W28 | — | 0.5 | G4XATOMX-A-A3 | — | — | — |
| 4 | Injector 3 | — | W29 | — | 0.5 | G4XATOMX-A-A2 | — | — | — |
| 5 | Injector 4 | — | W30 | — | 0.5 | G4XATOMX-A-A1 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Power source 2 (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Power ground 2 | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Injector 1 | — | W27 | — | 0.5 | G4XATOMX-A-A4 | — | — | — |
| 12 | VTEC solenoid | — | — | — | — | — | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
| 17 | NC | — | — | — | — | — | — | — | — |
| 18 | NC | — | — | — | — | — | — | — | — |
| 19 | NC | — | — | — | — | — | — | — | — |
| 20 | Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Backup power (battery constant) | — | — | — | — | — | — | — | — |
| 22 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 23 | Idle air control valve | — | — | — | — | — | — | — | — |
| 24 | NC | — | — | — | — | — | — | — | — |
| 25 | NC | — | — | — | — | — | — | — | — |
OEM-C
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Primary O2 heater | — | — | — | — | — | — | — | — |
| 2 | Alternator control | — | — | — | — | — | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W23 | — | 0.5 | G4XATOMX-A-A13 | — | — | — |
| 5 | Alternator FR signal | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W18 | — | 0.5 | G4XATOMX-A-A8 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 10 | VTEC pressure switch | — | — | — | — | — | — | — | — |
| 11 | Secondary O2 heater control | — | — | — | — | — | — | — | — |
| 12 | Ignition coil 2 | — | W24 | — | 0.5 | G4XATOMX-A-A12 | — | — | — |
| 13 | Ignition coil 3 | — | W25 | — | 0.5 | G4XATOMX-A-A11 | — | — | — |
| 14 | Ignition coil 4 | — | W26 | — | 0.5 | G4XATOMX-A-A10 | — | — | — |
| 15 | Secondary O2 sensor | — | — | — | — | — | — | — | — |
| 16 | Primary O2 sensor | — | — | — | — | — | — | — | — |
| 17 | MAP sensor | — | W35 | — | 0.5 | G4XATOMX-A-A17 | — | — | — |
| 18 | Sensor ground 2 | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W15 | — | 0.5 | SP-5V1-1 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W20 | — | 0.5 | G4XATOMX-A-A9 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | — | — | — | — | — | — | — |
| 25 | Intake air temp sensor | — | W39 | — | 0.5 | G4XATOMX-A-A16 | — | — | — |
| 26 | Coolant temp sensor | — | W38 | — | 0.5 | G4XATOMX-A-A15 | — | — | — |
| 27 | Throttle position sensor | — | W36 | — | 0.5 | G4XATOMX-A-A22 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W16 | — | 0.5 | SP-5V1-1 | — | — | — |
| 29 | Cam (TDC2) sensor + | — | W22 | — | 0.5 | G4XATOMX-A-A30 | — | — | — |
| 30 | Cam (TDC2) sensor − | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 31 | Timing ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-D
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | NC | — | — | — | — | — | — | — | — |
| 2 | NC | — | — | — | — | — | — | — | — |
| 3 | NC | — | — | — | — | — | — | — | — |
| 4 | NC | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | NC | — | — | — | — | — | — | — | — |
| 10 | NC | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | NC | — | — | — | — | — | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W12 | — | 0.5 | OEM-C-31 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-C-18 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-C-30 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-C-7 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | G4XATOMX-A-A24 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-C-9 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-C-21 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-B-1 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-B-9 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | G4XATOMX-A-A5 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-C-19 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-C-28 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | G4XATOMX-A-A32 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-B-10 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-B-20 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-22 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | G4XATOMX-A-A25 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | G4XATOMX-A-A34 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Coolant temp gauge drive | low_side_out | — | — | — | corroborated | |
| OEM-A-10 | Service check signal | — | — | — | — | single_source | |
| OEM-A-11 | NC | — | — | — | — | unverified | |
| OEM-A-12 | Immobilizer indicator light | low_side_out | — | — | — | single_source | |
| OEM-A-13 | Immobilizer enable signal | — | — | — | — | single_source | |
| OEM-A-14 | NC | — | — | — | — | unverified | |
| OEM-A-15 | Fuel pump relay (USDM) | low_side_out | G4XATOMX-A-A21 | Aux 1 | low_side_out | corroborated | |
| OEM-A-16 | Fuel pump relay (JDM) | low_side_out | G4XATOMX-A-A20 | Aux 2 | low_side_out | single_source | |
| OEM-A-17 | A/C clutch relay | low_side_out | G4XATOMX-A-A19 | Aux 3 | low_side_out | corroborated | |
| OEM-A-18 | Check engine light (MIL) | low_side_out | — | — | — | corroborated | |
| OEM-A-19 | Tacho output | tacho_out | — | — | — | corroborated | |
| OEM-A-2 | Air control valve solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-20 | Radiator fan relay | low_side_out | G4XATOMX-A-A18 | Aux 4 | low_side_out | corroborated | |
| OEM-A-21 | K-Line | serial | — | — | — | single_source | |
| OEM-A-22 | NC | — | — | — | — | unverified | |
| OEM-A-23 | Secondary O2 sensor | lambda_nb_in | G4XATOMX-A-A33 | Analog Volt 3 | analog_in | single_source | |
| OEM-A-24 | Starter switch signal | digital_in | — | — | — | corroborated | |
| OEM-A-25 | Immobilizer code | — | — | — | — | single_source | |
| OEM-A-26 | Power steering load detect | digital_in | — | — | — | corroborated | |
| OEM-A-27 | A/C switch (request) | digital_in | — | — | — | corroborated | |
| OEM-A-28 | Air pump relay | low_side_out | — | — | — | corroborated | |
| OEM-A-29 | Fuel tank pressure sensor | analog_in | — | — | — | corroborated | |
| OEM-A-3 | Evap bypass solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-30 | Electrical load detector | analog_in | — | — | — | corroborated | |
| OEM-A-31 | NC | — | — | — | — | unverified | |
| OEM-A-32 | Brake switch | digital_in | — | — | — | corroborated | |
| OEM-A-4 | Evap canister vent shut valve | low_side_out | — | — | — | single_source | |
| OEM-A-5 | NC | — | — | — | — | unverified | |
| OEM-A-6 | Evap canister purge valve | low_side_out | — | — | — | single_source | |
| OEM-A-7 | NC | — | — | — | — | unverified | |
| OEM-A-8 | NC | — | — | — | — | unverified | |
| OEM-A-9 | Vehicle speed sensor | digital_in | G4XATOMX-A-A31 | Digital Input 2 | digital_in | corroborated | |
| OEM-B-1 | Power source 1 (main relay) | power_in | G4XATOMX-A-A5 | +14V ECU Power | power_in | corroborated | |
| OEM-B-10 | Power ground 2 | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-B-11 | Injector 1 | injector_out | G4XATOMX-A-A4 | Injector 1 | injector_out | corroborated | |
| OEM-B-12 | VTEC solenoid | high_side_out | — | — | — | corroborated | |
| OEM-B-13 | NC | — | — | — | — | unverified | |
| OEM-B-14 | NC | — | — | — | — | unverified | |
| OEM-B-15 | NC | — | — | — | — | unverified | |
| OEM-B-16 | NC | — | — | — | — | unverified | |
| OEM-B-17 | NC | — | — | — | — | unverified | |
| OEM-B-18 | NC | — | — | — | — | unverified | |
| OEM-B-19 | NC | — | — | — | — | unverified | |
| OEM-B-2 | Power ground 1 | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | corroborated | |
| OEM-B-20 | Ground | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-B-21 | Backup power (battery constant) | power_in | — | — | — | single_source | |
| OEM-B-22 | Ground | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-B-23 | Idle air control valve | low_side_out | — | — | — | corroborated | |
| OEM-B-24 | NC | — | — | — | — | unverified | |
| OEM-B-25 | NC | — | — | — | — | unverified | |
| OEM-B-3 | Injector 2 | injector_out | G4XATOMX-A-A3 | Injector 2 | injector_out | corroborated | |
| OEM-B-4 | Injector 3 | injector_out | G4XATOMX-A-A2 | Injector 3 | injector_out | corroborated | |
| OEM-B-5 | Injector 4 | injector_out | G4XATOMX-A-A1 | Injector 4 | injector_out | corroborated | |
| OEM-B-6 | NC | — | — | — | — | unverified | |
| OEM-B-7 | NC | — | — | — | — | unverified | |
| OEM-B-8 | NC | — | — | — | — | unverified | |
| OEM-B-9 | Power source 2 (main relay) | power_in | G4XATOMX-A-A5 | +14V ECU Power | power_in | corroborated | |
| OEM-C-1 | Primary O2 heater | low_side_out | — | — | — | corroborated | |
| OEM-C-10 | VTEC pressure switch | digital_in | — | — | — | corroborated | |
| OEM-C-11 | Secondary O2 heater control | low_side_out | — | — | — | single_source | |
| OEM-C-12 | Ignition coil 2 | ignition_out | G4XATOMX-A-A12 | Ignition 2 | ignition_out | corroborated | |
| OEM-C-13 | Ignition coil 3 | ignition_out | G4XATOMX-A-A11 | Ignition 3 | ignition_out | corroborated | |
| OEM-C-14 | Ignition coil 4 | ignition_out | G4XATOMX-A-A10 | Ignition 4 | ignition_out | corroborated | |
| OEM-C-15 | Secondary O2 sensor | lambda_nb_in | — | — | — | corroborated | |
| OEM-C-16 | Primary O2 sensor | lambda_nb_in | — | — | — | corroborated | |
| OEM-C-17 | MAP sensor | analog_in | G4XATOMX-A-A17 | Analog Volt 1 | analog_in | corroborated | |
| OEM-C-18 | Sensor ground 2 | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-C-19 | Sensor 5V supply 1 (MAP) | vref | G4XATOMX-A-A32 | +5V Out | vref | corroborated | |
| OEM-C-2 | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-C-20 | Cam (TDC1) sensor + | trigger_in | G4XATOMX-A-A9 | Trigger 2 | trigger_in | corroborated | |
| OEM-C-21 | Cam (TDC1) sensor − | trigger_in | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-C-22 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-23 | NC | — | — | — | — | unverified | |
| OEM-C-24 | Air pump electric current sensor | analog_in | — | — | — | single_source | |
| OEM-C-25 | Intake air temp sensor | temp_in | G4XATOMX-A-A16 | Analog Temp 2 | temp_in | corroborated | |
| OEM-C-26 | Coolant temp sensor | temp_in | G4XATOMX-A-A15 | Analog Temp 1 | temp_in | corroborated | |
| OEM-C-27 | Throttle position sensor | analog_in | G4XATOMX-A-A22 | Analog Volt 2 | analog_in | corroborated | |
| OEM-C-28 | Sensor 5V supply 2 | vref | G4XATOMX-A-A32 | +5V Out | vref | corroborated | |
| OEM-C-29 | Cam (TDC2) sensor + | trigger_in | G4XATOMX-A-A30 | Digital Input 1 | digital_in | corroborated | |
| OEM-C-3 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-30 | Cam (TDC2) sensor − | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-C-31 | Timing ground | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | single_source | |
| OEM-C-4 | Ignition coil 1 | ignition_out | G4XATOMX-A-A13 | Ignition 1 | ignition_out | corroborated | |
| OEM-C-5 | Alternator FR signal | digital_in | — | — | — | single_source | |
| OEM-C-6 | NC | — | — | — | — | unverified | |
| OEM-C-7 | Sensor ground 1 | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-C-8 | Crank sensor + (CKP+) | trigger_in | G4XATOMX-A-A8 | Trigger 1 | trigger_in | corroborated | |
| OEM-C-9 | Crank sensor − (CKP−) | trigger_in | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-D-1 | NC | — | — | — | — | unverified | |
| OEM-D-10 | NC | — | — | — | — | unverified | |
| OEM-D-11 | NC | — | — | — | — | unverified | |
| OEM-D-12 | NC | — | — | — | — | unverified | |
| OEM-D-13 | NC | — | — | — | — | unverified | |
| OEM-D-14 | NC | — | — | — | — | unverified | |
| OEM-D-15 | NC | — | — | — | — | unverified | |
| OEM-D-16 | NC | — | — | — | — | unverified | |
| OEM-D-2 | NC | — | — | — | — | unverified | |
| OEM-D-3 | NC | — | — | — | — | unverified | |
| OEM-D-4 | NC | — | — | — | — | unverified | |
| OEM-D-5 | NC | — | — | — | — | unverified | |
| OEM-D-6 | NC | — | — | — | — | unverified | |
| OEM-D-7 | NC | — | — | — | — | unverified | |
| OEM-D-8 | NC | — | — | — | — | unverified | |
| OEM-D-9 | NC | — | — | — | — | unverified |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-B-1 | SP-14V-1 | 0.85 | no route | Power source 1 (main relay) | — | |
| W2 | OEM-B-9 | SP-14V-1 | 0.85 | no route | Power source 2 (main relay) | — | |
| W3 | SP-14V-1 | G4XATOMX-A-A5 | 0.85 | no route | +14V ECU Power | — | |
| W4 | OEM-B-10 | SP-GND-1 | 0.85 | no route | Power ground 2 | — | |
| W5 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W6 | OEM-B-20 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W7 | OEM-B-22 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W8 | SP-GND-1 | G4XATOMX-A-A25 | 0.85 | no route | System Ground | — | |
| W9 | SP-GND-1 | G4XATOMX-A-A34 | 0.85 | no route | System Ground | — | |
| W10 | OEM-C-18 | SP-0V-1 | 0.5 | no route | Sensor ground 2 | — | |
| W11 | OEM-C-30 | SP-0V-1 | 0.5 | no route | Cam (TDC2) sensor − | — | |
| W12 | OEM-C-31 | SP-0V-1 | 0.5 | no route | Timing ground | — | |
| W13 | OEM-C-7 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W14 | SP-0V-1 | G4XATOMX-A-A24 | 0.5 | no route | Sensor Ground | — | |
| W15 | OEM-C-19 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W16 | OEM-C-28 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W17 | SP-5V1-1 | G4XATOMX-A-A32 | 0.5 | no route | +5V Out | — | |
| W18 | OEM-C-8 | G4XATOMX-A-A8 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W19 | OEM-C-9 | SP-0V-1 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W20 | OEM-C-20 | G4XATOMX-A-A9 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W21 | OEM-C-21 | SP-0V-1 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W22 | OEM-C-29 | G4XATOMX-A-A30 | 0.5 | no route | Cam (TDC2) sensor + | — | |
| W23 | OEM-C-4 | G4XATOMX-A-A13 | 0.5 | no route | Ignition coil 1 | — | |
| W24 | OEM-C-12 | G4XATOMX-A-A12 | 0.5 | no route | Ignition coil 2 | — | |
| W25 | OEM-C-13 | G4XATOMX-A-A11 | 0.5 | no route | Ignition coil 3 | — | |
| W26 | OEM-C-14 | G4XATOMX-A-A10 | 0.5 | no route | Ignition coil 4 | — | |
| W27 | OEM-B-11 | G4XATOMX-A-A4 | 0.5 | no route | Injector 1 | — | |
| W28 | OEM-B-3 | G4XATOMX-A-A3 | 0.5 | no route | Injector 2 | — | |
| W29 | OEM-B-4 | G4XATOMX-A-A2 | 0.5 | no route | Injector 3 | — | |
| W30 | OEM-B-5 | G4XATOMX-A-A1 | 0.5 | no route | Injector 4 | — | |
| W31 | OEM-A-15 | G4XATOMX-A-A21 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W32 | OEM-A-16 | G4XATOMX-A-A20 | 0.5 | no route | Fuel pump relay (JDM) | — | |
| W33 | OEM-A-17 | G4XATOMX-A-A19 | 0.5 | no route | A/C clutch relay | — | |
| W34 | OEM-A-20 | G4XATOMX-A-A18 | 0.5 | no route | Radiator fan relay | — | |
| W35 | OEM-C-17 | G4XATOMX-A-A17 | 0.5 | no route | MAP sensor | — | |
| W36 | OEM-C-27 | G4XATOMX-A-A22 | 0.5 | no route | Throttle position sensor | — | |
| W37 | OEM-A-23 | G4XATOMX-A-A33 | 0.5 | no route | Secondary O2 sensor | — | |
| W38 | OEM-C-26 | G4XATOMX-A-A15 | 0.5 | no route | Coolant temp sensor | — | |
| W39 | OEM-C-25 | G4XATOMX-A-A16 | 0.5 | no route | Intake air temp sensor | — | |
| W40 | OEM-A-9 | G4XATOMX-A-A31 | 0.5 | no route | Vehicle speed sensor | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 179679-6 | TE | S2000 2000–05 ECU harness plug B (25P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179680-5 | TE | S2000 2000–05 ECU harness plug C (31P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179681-6 | TE | S2000 2000–05 ECU harness plug A (32P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | S2K-0005-ECU-D | Honda | S2000 2000–05 ECU plug D (P/N unknown) | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (13)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-B-12 | Required OEM function "VTEC solenoid" (high_side_out) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A1 | G4XATOMX-A-A1 "Injector 4" drives OEM-B-5 Injector 4 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A18 | G4XATOMX-A-A18 "Aux 4" drives OEM-A-20 Radiator fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A19 | G4XATOMX-A-A19 "Aux 3" drives OEM-A-17 A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A2 | G4XATOMX-A-A2 "Injector 3" drives OEM-B-4 Injector 3 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A20 | G4XATOMX-A-A20 "Aux 2" drives OEM-A-16 Fuel pump relay (JDM) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A21 | G4XATOMX-A-A21 "Aux 1" drives OEM-A-15 Fuel pump relay (USDM) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A3 | G4XATOMX-A-A3 "Injector 2" drives OEM-B-3 Injector 2 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G4XATOMX-A-A4 | G4XATOMX-A-A4 "Injector 1" drives OEM-B-11 Injector 1 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-C-29 ↔ G4XATOMX-A-A30 | OEM-C-29 "Cam (TDC2) sensor +" [trigger_in] is wired to G4XATOMX-A-A30 "Digital Input 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | SUPPLY_GROUP | G4XATOMX-A-A32 + OEM-C-19 + OEM-C-28 + SP-5V1-1 | Supplies meant to stay independent share one net: OEM-C-19 [s2k_vcc1], OEM-C-28 [s2k_vcc2]. 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-C-9 ↔ OEM-C-18 | OEM-C-9 "Crank sensor − (CKP−)" [trigger_in] is wired to OEM-C-18 "Sensor ground 2" [sensor_ground]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 31 optional OEM pins are not mapped: OEM-A-1 Coolant temp gauge drive; OEM-A-10 Service check signal; OEM-A-12 Immobilizer indicator light; OEM-A-13 Immobilizer enable signal; OEM-A-18 Check engine light (MIL); OEM-A-19 Tacho output; OEM-A-2 Air control valve solenoid; OEM-A-21 K-Line; OEM-A-24 Starter switch signal; OEM-A-25 Immobilizer code; OEM-A-26 Power steering load detect; OEM-A-27 A/C switch (request); OEM-A-28 Air pump relay; OEM-A-29 Fuel tank pressure sensor; OEM-A-3 Evap bypass solenoid; OEM-A-30 Electrical load detector; OEM-A-32 Brake switch; OEM-A-4 Evap canister vent shut valve; OEM-A-6 Evap canister purge valve; OEM-B-21 Backup power (battery constant); OEM-B-23 Idle air control valve; OEM-C-1 Primary O2 heater; OEM-C-10 VTEC pressure switch; OEM-C-11 Secondary O2 heater control; OEM-C-15 Secondary O2 sensor; OEM-C-16 Primary O2 sensor; OEM-C-2 Alternator control; OEM-C-22 Knock sensor; OEM-C-24 Air pump electric current sensor; OEM-C-3 Knock sensor; OEM-C-5 Alternator FR signal |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for Honda F20C not found in the ECU's docs (Link's trigger-mode list is only inside PCLink, not online) Auto-mapped by auto_map() from the library pin data on 2026-10-06. Review every wire against both manuals before building. Open items: - OEM-B 12: VTEC solenoid: no free high_side/ls_hs/hbridge rated ≥ 1.0 A on Link G4X AtomX Not wired: - OEM-B 21: Backup power (battery constant): Link G4X AtomX has no battery-constant input; not needed - OEM-C 22: Knock sensor: 2 stock pins named "Knock sensor" without a documented polarity / pairing; wire by hand - OEM-C 3: Knock sensor: 2 stock pins named "Knock sensor" without a documented polarity / pairing; wire by hand - OEM-A 28: Air pump relay: no free relay_control/low_side/ls_hs/injector/hbridge rated ≥ 0.2 A on Link G4X AtomX - OEM-C 1: Primary O2 heater: no free heater_low_side/low_side/ls_hs/hbridge on Link G4X AtomX - OEM-C 11: Secondary O2 heater control: no free heater_low_side/low_side/ls_hs/hbridge on Link G4X AtomX - OEM-B 23: Idle air control valve: no free low_side/ls_hs/injector/hbridge rated ≥ 1.0 A on Link G4X AtomX - OEM-A 1: Coolant temp gauge drive: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 12: Immobilizer indicator light: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 18: Check engine light (MIL): no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 2: Air control valve solenoid: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 3: Evap bypass solenoid: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 4: Evap canister vent shut valve: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 6: Evap canister purge valve: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-C 2: Alternator control: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-A 19: Tacho output: no free tacho/frequency_out/low_side/ls_hs on Link G4X AtomX - OEM-C 15: Secondary O2 sensor: no free o2_narrowband/analog_0_5 on Link G4X AtomX - OEM-C 16: Primary O2 sensor: no free o2_narrowband/analog_0_5 on Link G4X AtomX - OEM-A 29: Fuel tank pressure sensor: no free analog_0_5 on Link G4X AtomX - OEM-A 30: Electrical load detector: no free analog_0_5 on Link G4X AtomX - OEM-C 24: Air pump electric current sensor: no free analog_0_5 on Link G4X AtomX - OEM-C 5: Alternator FR signal: no free frequency_in/switch_in on Link G4X AtomX - OEM-A 24: Starter switch signal: no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-A 26: Power steering load detect: no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-A 27: A/C switch (request): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-A 32: Brake switch: no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C 10: VTEC pressure switch: no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-A 21: K-Line: no free k_line on Link G4X AtomX - OEM-A 10: Service check signal: not classified in the library; wire by hand - OEM-A 13: Immobilizer enable signal: not classified in the library; wire by hand - OEM-A 25: Immobilizer code: not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AEM 30-6052 Series 2 Plug & Play EMS, 2000–2005 S2000 (original ECU pinout) | https://documents.aemelectronics.com/techlibrary_30-6052_series_2_plug___play_ems.pdf | — | 2026-10-05 | 9f79620fff5a |
| 4 | vendor_doc | Haltech KB: F20C (AP1) engine | https://support.haltech.com/portal/en/kb/articles/f20c-ap1-engine | — | 2026-10-05 | e804da29d014 |
| 4 | vendor_doc | Link S2000 AP1 PlugIn installation manual | https://linkecu.com/documentation/S2000X.pdf | — | 2026-10-05 | d12b0ff3f006 |
| 4 | vendor_doc | Link: G4X AtomX quickstart | https://linkecu.com/documentation/AtomXQuickstartGuide.pdf | archive | 2026-10-05 | 5fa903ea7bdf |
| 3 | community_copy | YourSpec: Link G4X AtomX ECU flying-lead harness wiring list | https://wpm.yourspec.com/projects/view/1462 | — | — | — |
| 2 | forum | AllPinouts: 2000–2005 Honda S2000 ECU | https://allpinouts.org/pinouts/connectors/car/2000-2005-honda-s2000-ecu/ | archive | 2026-10-05 | 81d874e0385d |
| 2 | forum | Autodata blog: ECU Pinout Honda S2000 2000-2004 | http://autodatas.blogspot.com/2012/11/ecu-pinout-honda-s2000-2000-2004.html | — | 2026-10-05 | 33b93af7640e |
| 2 | derived | Typical load estimates (relay coil ~0.2 A, high-Z injector ~1.2 A, VVT solenoid ~1 A) | — | — | — | — |