AP1 2000–03 (F20C) → DTAFast T2i (auto)
AP1 2000–03 (F20C) — DTAFast — T2i
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-11
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 | 7: read the Findings page before cutting any wire |
| Size of the job | 40 wires · 9 connectors · 6 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-B-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-B-9 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | T2I-C1-31 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-B-21 | T2I-C1-21 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-B-10 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-B-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B-20 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-B-22 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | T2I-C1-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | T2I-C1-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-C-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C-30 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-C-31 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-C-7 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | T2I-C1-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | T2I-C1-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C-19 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-28 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-5V1-1 | T2I-C1-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-8 | T2I-C1-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-20 | T2I-C1-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-4 | T2I-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-C-12 | T2I-C1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-15 | T2I-C1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-16 | T2I-C1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-17 | T2I-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-20 | T2I-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-C-1 | T2I-C1-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-C-17 | T2I-C1-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-C-27 | T2I-C1-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-23 | T2I-C1-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-C-15 | T2I-C1-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-C-16 | T2I-C1-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-C-26 | T2I-C1-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-C-25 | T2I-C1-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-29 | T2I-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-9 | T2I-C1-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-C-5 | T2I-C1-30 | 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 | T2I-C1-21 | T2I-C1-28 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | T2I-C1-31 | T2I-C1-13 | open (OL) | +12 V supply must not touch power ground | |
| 3 | T2I-C1-31 | T2I-C1-28 | open (OL) | +12 V supply must not touch sensor ground | |
| 4 | T2I-C1-13 | T2I-C1-21 | open (OL) | power ground must not touch +12 V supply | |
| 5 | T2I-C1-13 | T2I-C1-27 | open (OL) | power ground must not touch 5 V sensor reference | |
| 6 | T2I-C1-21 | T2I-C1-27 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 7 | T2I-C1-28 | T2I-C1-27 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 8 | T2I-C1-31 | T2I-C1-27 | 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-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 | — | W39 | — | 0.5 | T2I-C1-11 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | — | — | — | — | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W26 | — | 0.5 | T2I-C1-1 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | W27 | — | 0.5 | T2I-C1-10 | — | — | — |
| 17 | A/C clutch relay | — | W28 | — | 0.5 | T2I-C1-18 | — | — | — |
| 18 | Check engine light (MIL) | — | — | — | — | — | — | — | — |
| 19 | Tacho output | — | — | — | — | — | — | — | — |
| 20 | Radiator fan relay | — | W29 | — | 0.5 | T2I-C1-26 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | W33 | — | 0.5 | T2I-C1-23 | — | — | — |
| 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 | — | W38 | — | 0.5 | T2I-C1-34 | — | — | — |
| 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 | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Injector 2 | — | — | — | — | — | — | — | — |
| 4 | Injector 3 | — | — | — | — | — | — | — | — |
| 5 | Injector 4 | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Power source 2 (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Power ground 2 | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Injector 1 | — | — | — | — | — | — | — | — |
| 12 | VTEC solenoid | — | — | — | — | — | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
| 17 | NC | — | — | — | — | — | — | — | — |
| 18 | NC | — | — | — | — | — | — | — | — |
| 19 | NC | — | — | — | — | — | — | — | — |
| 20 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Backup power (battery constant) | — | W4 | — | 0.85 | T2I-C1-21 | — | — | — |
| 22 | Ground | — | W8 | — | 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 | — | W30 | — | 0.5 | T2I-C1-15 | — | — | — |
| 2 | Alternator control | — | — | — | — | — | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W24 | — | 0.5 | T2I-C1-3 | — | — | — |
| 5 | Alternator FR signal | — | W40 | — | 0.5 | T2I-C1-30 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W20 | — | 0.5 | T2I-C1-19 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 10 | VTEC pressure switch | — | — | — | — | — | — | — | — |
| 11 | Secondary O2 heater control | — | — | — | — | — | — | — | — |
| 12 | Ignition coil 2 | — | W25 | — | 0.5 | T2I-C1-6 | — | — | — |
| 13 | Ignition coil 3 | — | — | — | — | — | — | — | — |
| 14 | Ignition coil 4 | — | — | — | — | — | — | — | — |
| 15 | Secondary O2 sensor | — | W34 | — | 0.5 | T2I-C1-25 | — | — | — |
| 16 | Primary O2 sensor | — | W35 | — | 0.5 | T2I-C1-33 | — | — | — |
| 17 | MAP sensor | — | W31 | — | 0.5 | T2I-C1-20 | — | — | — |
| 18 | Sensor ground 2 | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W17 | — | 0.5 | SP-5V1-1 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W22 | — | 0.5 | T2I-C1-12 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | — | — | — | — | — | — | — |
| 25 | Intake air temp sensor | — | W37 | — | 0.5 | T2I-C1-32 | — | — | — |
| 26 | Coolant temp sensor | — | W36 | — | 0.5 | T2I-C1-24 | — | — | — |
| 27 | Throttle position sensor | — | W32 | — | 0.5 | T2I-C1-22 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W18 | — | 0.5 | SP-5V1-1 | — | — | — |
| 29 | Cam (TDC2) sensor + | — | — | — | — | — | — | — | — |
| 30 | Cam (TDC2) sensor − | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 31 | Timing ground | — | W13 | — | 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 | — | — | W15 | — | 0.5 | T2I-C1-28 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | T2I-C1-29 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-C-9 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-C-21 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-C-18 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-C-30 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-C-31 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-C-7 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W2 | — | 0.85 | OEM-B-9 | — | — | — |
| 1 | — | — | W1 | — | 0.85 | OEM-B-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | T2I-C1-31 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W17 | — | 0.5 | OEM-C-19 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-C-28 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | T2I-C1-27 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-B-10 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-20 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-B-22 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | T2I-C1-13 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | T2I-C1-14 | — | — | — |
T2I-C1
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | PWM 1 | — | W26 | — | 0.5 | OEM-A-15 | — | — | — |
| 2 | Lambda Nernst Voltage | — | — | — | — | — | — | — | — |
| 3 | Coil 1 | — | W24 | — | 0.5 | OEM-C-4 | — | — | — |
| 4 | Lambda VGND | — | — | — | — | — | — | — | — |
| 5 | Lambda Pump Current | — | — | — | — | — | — | — | — |
| 6 | Coil 2 | — | W25 | — | 0.5 | OEM-C-12 | — | — | — |
| 7 | Lambda Trim Resistor | — | — | — | — | — | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | — | — | — | — | — | — | — | — | — |
| 10 | PWM 2 | — | W27 | — | 0.5 | OEM-A-16 | — | — | — |
| 11 | Digital 1 | — | W39 | — | 0.5 | OEM-A-9 | — | — | — |
| 12 | Wheel 1 | — | W22 | — | 0.5 | OEM-C-20 | — | — | — |
| 13 | Power Ground 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Power Ground 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Lambda Heater Negative | — | W30 | — | 0.5 | OEM-C-1 | — | — | — |
| 16 | CAN High | — | — | — | — | — | — | — | — |
| 17 | CAN Low | — | — | — | — | — | — | — | — |
| 18 | PWM 3 | — | W28 | — | 0.5 | OEM-A-17 | — | — | — |
| 19 | Crank | — | W20 | — | 0.5 | OEM-C-8 | — | — | — |
| 20 | Analogue 1 | — | W31 | — | 0.5 | OEM-C-17 | — | — | — |
| 21 | Permanent 12v | — | W4 | — | 0.85 | OEM-B-21 | — | — | — |
| 22 | Analogue 2 | — | W32 | — | 0.5 | OEM-C-27 | — | — | — |
| 23 | Analogue 3 | — | W33 | — | 0.5 | OEM-A-23 | — | — | — |
| 24 | Thermistor 1 | — | W36 | — | 0.5 | OEM-C-26 | — | — | — |
| 25 | Analogue 4 | — | W34 | — | 0.5 | OEM-C-15 | — | — | — |
| 26 | PWM 4 | — | W29 | — | 0.5 | OEM-A-20 | — | — | — |
| 27 | 5v Output | — | W19 | — | 0.5 | SP-5V1-1 | — | — | — |
| 28 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 29 | Sensor Ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 30 | Digital 2 | — | W40 | — | 0.5 | OEM-C-5 | — | — | — |
| 31 | Ignition 12v In | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 32 | Thermistor 2 | — | W37 | — | 0.5 | OEM-C-25 | — | — | — |
| 33 | Analogue 5 | — | W35 | — | 0.5 | OEM-C-16 | — | — | — |
| 34 | Analogue 6 | — | W38 | — | 0.5 | OEM-A-29 | — | — | — |
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 | T2I-C1-1 | PWM 1 | low_side_out | corroborated | |
| OEM-A-16 | Fuel pump relay (JDM) | low_side_out | T2I-C1-10 | PWM 2 | low_side_out | single_source | |
| OEM-A-17 | A/C clutch relay | low_side_out | T2I-C1-18 | PWM 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 | T2I-C1-26 | PWM 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 | T2I-C1-23 | Analogue 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 | T2I-C1-34 | Analogue 6 | 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 | T2I-C1-11 | Digital 1 | digital_in | corroborated | |
| OEM-B-1 | Power source 1 (main relay) | power_in | T2I-C1-31 | Ignition 12v In | power_in | corroborated | |
| OEM-B-10 | Power ground 2 | ground | T2I-C1-13 + T2I-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-B-11 | 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 | T2I-C1-13 + T2I-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-B-20 | Ground | ground | T2I-C1-13 + T2I-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-B-21 | Backup power (battery constant) | power_in | T2I-C1-21 | Permanent 12v | power_in | single_source | |
| OEM-B-22 | Ground | ground | T2I-C1-13 + T2I-C1-14 | Power Ground 1 + Power Ground 2 | 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 | — | — | — | corroborated | |
| OEM-B-4 | Injector 3 | injector_out | — | — | — | corroborated | |
| OEM-B-5 | 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 | T2I-C1-31 | Ignition 12v In | power_in | corroborated | |
| OEM-C-1 | Primary O2 heater | low_side_out | T2I-C1-15 | Lambda Heater Negative | 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 | T2I-C1-6 | Coil 2 | ignition_out | corroborated | |
| OEM-C-13 | Ignition coil 3 | ignition_out | — | — | — | corroborated | |
| OEM-C-14 | Ignition coil 4 | ignition_out | — | — | — | corroborated | |
| OEM-C-15 | Secondary O2 sensor | lambda_nb_in | T2I-C1-25 | Analogue 4 | analog_in | corroborated | |
| OEM-C-16 | Primary O2 sensor | lambda_nb_in | T2I-C1-33 | Analogue 5 | analog_in | corroborated | |
| OEM-C-17 | MAP sensor | analog_in | T2I-C1-20 | Analogue 1 | analog_in | corroborated | |
| OEM-C-18 | Sensor ground 2 | sensor_ground | T2I-C1-28 + T2I-C1-29 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-C-19 | Sensor 5V supply 1 (MAP) | vref | T2I-C1-27 | 5v Output | vref | corroborated | |
| OEM-C-2 | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-C-20 | Cam (TDC1) sensor + | trigger_in | T2I-C1-12 | Wheel 1 | digital_in | corroborated | |
| OEM-C-21 | Cam (TDC1) sensor − | trigger_in | T2I-C1-28 + T2I-C1-29 | Sensor Ground + 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 | T2I-C1-32 | Thermistor 2 | temp_in | corroborated | |
| OEM-C-26 | Coolant temp sensor | temp_in | T2I-C1-24 | Thermistor 1 | temp_in | corroborated | |
| OEM-C-27 | Throttle position sensor | analog_in | T2I-C1-22 | Analogue 2 | analog_in | corroborated | |
| OEM-C-28 | Sensor 5V supply 2 | vref | T2I-C1-27 | 5v Output | vref | corroborated | |
| OEM-C-29 | Cam (TDC2) sensor + | trigger_in | — | — | — | corroborated | |
| OEM-C-3 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-30 | Cam (TDC2) sensor − | sensor_ground | T2I-C1-28 + T2I-C1-29 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-C-31 | Timing ground | sensor_ground | T2I-C1-28 + T2I-C1-29 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-4 | Ignition coil 1 | ignition_out | T2I-C1-3 | Coil 1 | ignition_out | corroborated | |
| OEM-C-5 | Alternator FR signal | digital_in | T2I-C1-30 | Digital 2 | digital_in | single_source | |
| OEM-C-6 | NC | — | — | — | — | unverified | |
| OEM-C-7 | Sensor ground 1 | sensor_ground | T2I-C1-28 + T2I-C1-29 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-C-8 | Crank sensor + (CKP+) | trigger_in | T2I-C1-19 | Crank | trigger_in | corroborated | |
| OEM-C-9 | Crank sensor − (CKP−) | trigger_in | T2I-C1-28 + T2I-C1-29 | Sensor Ground + 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 | T2I-C1-31 | 0.85 | no route | Ignition 12v In | — | |
| W4 | OEM-B-21 | T2I-C1-21 | 0.85 | no route | Backup power (battery constant) | — | |
| W5 | OEM-B-10 | SP-GND-1 | 0.85 | no route | Power ground 2 | — | |
| W6 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W7 | OEM-B-20 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W8 | OEM-B-22 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W9 | SP-GND-1 | T2I-C1-13 | 0.85 | no route | Power Ground 1 | — | |
| W10 | SP-GND-1 | T2I-C1-14 | 0.85 | no route | Power Ground 2 | — | |
| W11 | OEM-C-18 | SP-0V-1 | 0.5 | no route | Sensor ground 2 | — | |
| W12 | OEM-C-30 | SP-0V-1 | 0.5 | no route | Cam (TDC2) sensor − | — | |
| W13 | OEM-C-31 | SP-0V-1 | 0.5 | no route | Timing ground | — | |
| W14 | OEM-C-7 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W15 | SP-0V-1 | T2I-C1-28 | 0.5 | no route | Sensor Ground | — | |
| W16 | SP-0V-1 | T2I-C1-29 | 0.5 | no route | Sensor Ground | — | |
| W17 | OEM-C-19 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W18 | OEM-C-28 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W19 | SP-5V1-1 | T2I-C1-27 | 0.5 | no route | 5v Output | — | |
| W20 | OEM-C-8 | T2I-C1-19 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W21 | OEM-C-9 | SP-0V-1 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W22 | OEM-C-20 | T2I-C1-12 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W23 | OEM-C-21 | SP-0V-1 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W24 | OEM-C-4 | T2I-C1-3 | 0.5 | no route | Ignition coil 1 | — | |
| W25 | OEM-C-12 | T2I-C1-6 | 0.5 | no route | Ignition coil 2 | — | |
| W26 | OEM-A-15 | T2I-C1-1 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W27 | OEM-A-16 | T2I-C1-10 | 0.5 | no route | Fuel pump relay (JDM) | — | |
| W28 | OEM-A-17 | T2I-C1-18 | 0.5 | no route | A/C clutch relay | — | |
| W29 | OEM-A-20 | T2I-C1-26 | 0.5 | no route | Radiator fan relay | — | |
| W30 | OEM-C-1 | T2I-C1-15 | 0.5 | no route | Primary O2 heater | — | |
| W31 | OEM-C-17 | T2I-C1-20 | 0.5 | no route | MAP sensor | — | |
| W32 | OEM-C-27 | T2I-C1-22 | 0.5 | no route | Throttle position sensor | — | |
| W33 | OEM-A-23 | T2I-C1-23 | 0.5 | no route | Secondary O2 sensor | — | |
| W34 | OEM-C-15 | T2I-C1-25 | 0.5 | no route | Secondary O2 sensor | — | |
| W35 | OEM-C-16 | T2I-C1-33 | 0.5 | no route | Primary O2 sensor | — | |
| W36 | OEM-C-26 | T2I-C1-24 | 0.5 | no route | Coolant temp sensor | — | |
| W37 | OEM-C-25 | T2I-C1-32 | 0.5 | no route | Intake air temp sensor | — | |
| W38 | OEM-A-29 | T2I-C1-34 | 0.5 | no route | Fuel tank pressure sensor | — | |
| W39 | OEM-A-9 | T2I-C1-11 | 0.5 | no route | Vehicle speed sensor | — | |
| W40 | OEM-C-5 | T2I-C1-30 | 0.5 | no route | Alternator FR signal | — |
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 | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | S2K-0005-ECU-D | Honda | S2000 2000–05 ECU plug D (P/N unknown) | 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 (12)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-B-11 | Required OEM function "Injector 1" (injector_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-12 | Required OEM function "VTEC solenoid" (high_side_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-3 | Required OEM function "Injector 2" (injector_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-4 | Required OEM function "Injector 3" (injector_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-5 | Required OEM function "Injector 4" (injector_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-C-13 | Required OEM function "Ignition coil 3" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-C-14 | Required OEM function "Ignition coil 4" (ignition_out) is not connected to the new ECU. |
| warn | DATASET_GAP | T2i C1 | 2 of 34 cavities on T2i C1 have no pin data (8,9). Anything there is invisible to these checks. |
| warn | NET_FAMILY | OEM-C-20 ↔ T2I-C1-12 | OEM-C-20 "Cam (TDC1) sensor +" [trigger_in] is wired to T2I-C1-12 "Wheel 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | SUPPLY_GROUP | OEM-C-19 + OEM-C-28 + SP-5V1-1 + T2I-C1-27 | 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-7 ↔ OEM-C-9 | OEM-C-7 "Sensor ground 1" [sensor_ground] is wired to OEM-C-9 "Crank sensor − (CKP−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 26 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-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-23 Idle air control valve; OEM-C-10 VTEC pressure switch; OEM-C-11 Secondary O2 heater control; OEM-C-2 Alternator control; OEM-C-22 Knock sensor; OEM-C-24 Air pump electric current sensor; OEM-C-29 Cam (TDC2) sensor +; OEM-C-3 Knock sensor |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-C 13: Ignition coil 3: no free ignition output on DTAFast T2i - OEM-C 14: Ignition coil 4: no free ignition output on DTAFast T2i - OEM-B 11: Injector 1: no free injector output on DTAFast T2i - OEM-B 3: Injector 2: no free injector output on DTAFast T2i - OEM-B 4: Injector 3: no free injector output on DTAFast T2i - OEM-B 5: Injector 4: no free injector output on DTAFast T2i - OEM-B 12: VTEC solenoid: no free high_side/ls_hs/hbridge rated ≥ 1.0 A on DTAFast T2i Not wired: - OEM-C 29: Cam (TDC2) sensor +: no free cam_vr/cam_hall/frequency_in input on DTAFast T2i - OEM-C 22: Knock sensor: no free knock input on DTAFast T2i - OEM-C 3: Knock sensor: no free knock input on DTAFast T2i - OEM-A 28: Air pump relay: no free relay_control/low_side/ls_hs/injector/hbridge rated ≥ 0.2 A on DTAFast T2i - OEM-C 11: Secondary O2 heater control: no free heater_low_side/low_side/ls_hs/hbridge on DTAFast T2i - OEM-B 23: Idle air control valve: no free low_side/ls_hs/injector/hbridge rated ≥ 1.0 A on DTAFast T2i - OEM-A 1: Coolant temp gauge drive: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 12: Immobilizer indicator light: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 18: Check engine light (MIL): no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 2: Air control valve solenoid: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 3: Evap bypass solenoid: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 4: Evap canister vent shut valve: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 6: Evap canister purge valve: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-C 2: Alternator control: no free low_side/ls_hs/injector/hbridge on DTAFast T2i - OEM-A 19: Tacho output: no free tacho/frequency_out/low_side/ls_hs on DTAFast T2i - OEM-A 30: Electrical load detector: no free analog_0_5 on DTAFast T2i - OEM-C 24: Air pump electric current sensor: no free analog_0_5 on DTAFast T2i - OEM-A 24: Starter switch signal: no free switch_in/frequency_in/analog_0_5 on DTAFast T2i - OEM-A 26: Power steering load detect: no free switch_in/frequency_in/analog_0_5 on DTAFast T2i - OEM-A 27: A/C switch (request): no free switch_in/frequency_in/analog_0_5 on DTAFast T2i - OEM-A 32: Brake switch: no free switch_in/frequency_in/analog_0_5 on DTAFast T2i - OEM-C 10: VTEC pressure switch: no free switch_in/frequency_in/analog_0_5 on DTAFast T2i - OEM-A 21: K-Line: no free k_line on DTAFast T2i - 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 | DTAFast T2i ECU wiring diagram | https://cdn.shopify.com/s/files/1/0848/7508/4108/files/T2i_Wiring-Diagram.pdf?v=1728571341 | — | — | — |
| 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 |
| 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) | — | — | — | — |