AP2 2004–05 (F22C1, cable) → DTAFast T4 (auto)
AP2 2004–05 (F22C1, cable) — DTAFast — T4
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-09
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 | 58 wires · 11 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 | T4-C1-31 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-B-21 | T4-C3-26 | 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 | T4-C1-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | T4-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 | T4-C2-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | T4-C2-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C-19 | T4-C2-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-28 | T4-C2-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C-8 | T4-C2-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-20 | T4-C2-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-29 | T4-C2-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-4 | T4-C1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-C-12 | T4-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-C-13 | T4-C1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-C-14 | T4-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-B-11 | T4-C1-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-3 | T4-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B-4 | T4-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-5 | T4-C1-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-15 | T4-C1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A-16 | T4-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-17 | T4-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-20 | T4-C3-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-28 | T4-C3-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-B-12 | RLY1-R-OUT | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | SP-14V-1 | RLY1-R-IN | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | RLY1-R-COIL- | T4-C3-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-C-1 | T4-C3-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-C-11 | T4-C3-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-B-23 | T4-C3-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-C-17 | T4-C2-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-C-27 | T4-C2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-23 | T4-C2-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-C-15 | T4-C2-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-C-16 | T4-C2-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-C-26 | T4-C2-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-C-25 | T4-C2-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-29 | T4-C3-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-30 | T4-C3-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-C-24 | T4-C2-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-A-9 | T4-C2-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-C-5 | T4-C2-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-24 | T4-C2-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-A-26 | T4-C2-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-A-27 | T4-C2-16 | 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 | RLY1-R-COIL+ | T4-C1-13 | open (OL) | +12 V supply must not touch power ground | |
| 2 | RLY1-R-COIL+ | T4-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | RLY1-R-OUT | T4-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 4 | T4-C3-26 | T4-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 5 | RLY1-R-COIL+ | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 6 | RLY1-R-COIL+ | T4-C2-9 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 7 | RLY1-R-OUT | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | RLY1-R-OUT | T4-C2-9 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 9 | T4-C1-13 | RLY1-R-OUT | open (OL) | power ground must not touch +12 V supply | |
| 10 | T4-C1-13 | T4-C2-24 | open (OL) | power ground must not touch 5 V sensor reference | |
| 11 | T4-C1-13 | T4-C2-9 | open (OL) | power ground must not touch 5 V sensor reference | |
| 12 | T4-C1-13 | T4-C3-26 | open (OL) | power ground must not touch +12 V supply | |
| 13 | T4-C2-21 | T4-C2-24 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 14 | T4-C2-21 | T4-C2-9 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 15 | T4-C3-26 | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 16 | T4-C3-26 | T4-C2-9 | 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 | — | W54 | — | 0.5 | T4-C2-4 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | — | — | — | — | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W32 | — | 0.5 | T4-C1-5 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | W33 | — | 0.5 | T4-C1-4 | — | — | — |
| 17 | A/C clutch relay | — | W34 | — | 0.5 | T4-C1-3 | — | — | — |
| 18 | Check engine light (MIL) | — | — | — | — | — | — | — | — |
| 19 | Tacho output | — | — | — | — | — | — | — | — |
| 20 | Radiator fan relay | — | W35 | — | 0.5 | T4-C3-22 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | W46 | — | 0.5 | T4-C2-5 | — | — | — |
| 24 | Starter switch signal | — | W56 | — | 0.5 | T4-C2-15 | — | — | — |
| 25 | Immobilizer code | — | — | — | — | — | — | — | — |
| 26 | Power steering load detect | — | W57 | — | 0.5 | T4-C2-3 | — | — | — |
| 27 | A/C switch (request) | — | W58 | — | 0.5 | T4-C2-16 | — | — | — |
| 28 | Air pump relay | — | W36 | — | 0.5 | T4-C3-23 | — | — | — |
| 29 | Fuel tank pressure sensor | — | W51 | — | 0.5 | T4-C3-17 | — | — | — |
| 30 | Electrical load detector | — | W52 | — | 0.5 | T4-C3-18 | — | — | — |
| 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 | — | W29 | — | 0.5 | T4-C1-17 | — | — | — |
| 4 | Injector 3 | — | W30 | — | 0.5 | T4-C1-34 | — | — | — |
| 5 | Injector 4 | — | W31 | — | 0.5 | T4-C1-25 | — | — | — |
| 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 | — | W28 | — | 0.5 | T4-C1-9 | — | — | — |
| 12 | VTEC solenoid | — | W37 | — | 0.5 | RLY1-R-OUT | — | — | — |
| 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 | T4-C3-26 | — | — | — |
| 22 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 23 | Idle air control valve | — | W43 | — | 0.5 | T4-C3-10 | — | — | — |
| 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 | — | W41 | — | 0.5 | T4-C3-9 | — | — | — |
| 2 | Alternator control | — | — | — | — | — | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W24 | — | 0.5 | T4-C1-10 | — | — | — |
| 5 | Alternator FR signal | — | W55 | — | 0.5 | T4-C2-14 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W19 | — | 0.5 | T4-C2-12 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 10 | VTEC pressure switch | — | — | — | — | — | — | — | — |
| 11 | Secondary O2 heater control | — | W42 | — | 0.5 | T4-C3-25 | — | — | — |
| 12 | Ignition coil 2 | — | W25 | — | 0.5 | T4-C1-18 | — | — | — |
| 13 | Ignition coil 3 | — | W26 | — | 0.5 | T4-C1-1 | — | — | — |
| 14 | Ignition coil 4 | — | W27 | — | 0.5 | T4-C1-26 | — | — | — |
| 15 | Secondary O2 sensor | — | W47 | — | 0.5 | T4-C2-6 | — | — | — |
| 16 | Primary O2 sensor | — | W48 | — | 0.5 | T4-C2-19 | — | — | — |
| 17 | MAP sensor | — | W44 | — | 0.5 | T4-C2-10 | — | — | — |
| 18 | Sensor ground 2 | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W17 | — | 0.5 | T4-C2-24 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W21 | — | 0.5 | T4-C2-22 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | W53 | — | 0.5 | T4-C2-34 | — | — | — |
| 25 | Intake air temp sensor | — | W50 | — | 0.5 | T4-C2-25 | — | — | — |
| 26 | Coolant temp sensor | — | W49 | — | 0.5 | T4-C2-7 | — | — | — |
| 27 | Throttle position sensor | — | W45 | — | 0.5 | T4-C2-1 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W18 | — | 0.5 | T4-C2-9 | — | — | — |
| 29 | Cam (TDC2) sensor + | — | W23 | — | 0.5 | T4-C2-2 | — | — | — |
| 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 | — | — | — | — | — | — | — | — |
RLY1-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (switched +12 V) | — | W39 | — | 0.5 | SP-14V-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W40 | — | 0.5 | T4-C3-24 | — | — | — |
| IN | Relay contact input (switched +12 V) | — | W38 | — | 0.5 | SP-14V-1 | — | — | — |
| OUT | Relay contact output (switched +12 V to load) | — | W37 | — | 0.5 | OEM-B-12 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W20 | — | 0.5 | OEM-C-9 | — | — | — |
| 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 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | T4-C2-21 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | T4-C2-33 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-C-21 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.85 | T4-C1-31 | — | — | — |
| 1 | — | — | W1 | — | 0.85 | OEM-B-1 | — | — | — |
| 1 | — | — | W38 | — | 0.5 | RLY1-R-IN | — | — | — |
| 1 | — | — | W39 | — | 0.5 | RLY1-R-COIL+ | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-B-9 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.85 | T4-C1-14 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-20 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-B-10 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-B-22 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | T4-C1-13 | — | — | — |
T4-C1
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coil 3 | — | W26 | — | 0.5 | OEM-C-13 | — | — | — |
| 2 | — | — | — | — | — | — | — | — | — |
| 3 | PWM 3 | — | W34 | — | 0.5 | OEM-A-17 | — | — | — |
| 4 | PWM 2 | — | W33 | — | 0.5 | OEM-A-16 | — | — | — |
| 5 | PWM 1 | — | W32 | — | 0.5 | OEM-A-15 | — | — | — |
| 6 | — | — | — | — | — | — | — | — | — |
| 7 | — | — | — | — | — | — | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | Injector 1 | — | W28 | — | 0.5 | OEM-B-11 | — | — | — |
| 10 | Coil 1 | — | W24 | — | 0.5 | OEM-C-4 | — | — | — |
| 11 | — | — | — | — | — | — | — | — | — |
| 12 | — | — | — | — | — | — | — | — | — |
| 13 | Power Ground 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Power Ground 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | — | — | — | — | — | — | — | — | — |
| 16 | — | — | — | — | — | — | — | — | — |
| 17 | Injector 2 | — | W29 | — | 0.5 | OEM-B-3 | — | — | — |
| 18 | Coil 2 | — | W25 | — | 0.5 | OEM-C-12 | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | — | — | — | — | — | — | — | — | — |
| 22 | — | — | — | — | — | — | — | — | — |
| 23 | — | — | — | — | — | — | — | — | — |
| 24 | — | — | — | — | — | — | — | — | — |
| 25 | Injector 4 | — | W31 | — | 0.5 | OEM-B-5 | — | — | — |
| 26 | Coil 4 | — | W27 | — | 0.5 | OEM-C-14 | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — |
| 28 | — | — | — | — | — | — | — | — | — |
| 29 | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — |
| 31 | Ignition 12v In | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 32 | — | — | — | — | — | — | — | — | — |
| 33 | — | — | — | — | — | — | — | — | — |
| 34 | Injector 3 | — | W30 | — | 0.5 | OEM-B-4 | — | — | — |
T4-C2
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Analogue 2 | — | W45 | — | 0.5 | OEM-C-27 | — | — | — |
| 2 | Wheel 1 | — | W23 | — | 0.5 | OEM-C-29 | — | — | — |
| 3 | Analogue 10 | — | W57 | — | 0.5 | OEM-A-26 | — | — | — |
| 4 | Digital 1 | — | W54 | — | 0.5 | OEM-A-9 | — | — | — |
| 5 | Analogue 3 | — | W46 | — | 0.5 | OEM-A-23 | — | — | — |
| 6 | Analogue 4 | — | W47 | — | 0.5 | OEM-C-15 | — | — | — |
| 7 | Thermistor 1 | — | W49 | — | 0.5 | OEM-C-26 | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | 5v Output | — | W18 | — | 0.5 | OEM-C-28 | — | — | — |
| 10 | Analogue 1 | — | W44 | — | 0.5 | OEM-C-17 | — | — | — |
| 11 | — | — | — | — | — | — | — | — | — |
| 12 | Crank | — | W19 | — | 0.5 | OEM-C-8 | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | Digital 4 | — | W55 | — | 0.5 | OEM-C-5 | — | — | — |
| 15 | Digital 5 | — | W56 | — | 0.5 | OEM-A-24 | — | — | — |
| 16 | Analogue 11 | — | W58 | — | 0.5 | OEM-A-27 | — | — | — |
| 17 | Thermistor 3 | — | — | — | — | — | — | — | — |
| 18 | — | — | — | — | — | — | — | — | — |
| 19 | Analogue 6 | — | W48 | — | 0.5 | OEM-C-16 | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Cam 1 | — | W21 | — | 0.5 | OEM-C-20 | — | — | — |
| 23 | — | — | — | — | — | — | — | — | — |
| 24 | 5v Output | — | W17 | — | 0.5 | OEM-C-19 | — | — | — |
| 25 | Thermistor 2 | — | W50 | — | 0.5 | OEM-C-25 | — | — | — |
| 26 | CAN High | — | — | — | — | — | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — |
| 28 | CAN Low | — | — | — | — | — | — | — | — |
| 29 | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — |
| 32 | — | — | — | — | — | — | — | — | — |
| 33 | Sensor Ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Analogue 9 | — | W53 | — | 0.5 | OEM-C-24 | — | — | — |
T4-C3
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | — | — | — | — | — | — | — |
| 2 | — | — | — | — | — | — | — | — | — |
| 3 | — | — | — | — | — | — | — | — | — |
| 4 | — | — | — | — | — | — | — | — | — |
| 5 | — | — | — | — | — | — | — | — | — |
| 6 | — | — | — | — | — | — | — | — | — |
| 7 | Lambda 1 Pump Current | — | — | — | — | — | — | — | — |
| 8 | Lambda 1 VGND | — | — | — | — | — | — | — | — |
| 9 | Lambda 1 Heater Negative | — | W41 | — | 0.5 | OEM-C-1 | — | — | — |
| 10 | PWM 8 | — | W43 | — | 0.5 | OEM-B-23 | — | — | — |
| 11 | Lambda 1 Trim Resistor | — | — | — | — | — | — | — | — |
| 12 | Lambda 1 Nernst Voltage | — | — | — | — | — | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | — | — | — | — | — | — | — | — | — |
| 15 | — | — | — | — | — | — | — | — | — |
| 16 | — | — | — | — | — | — | — | — | — |
| 17 | Analogue 7 | — | W51 | — | 0.5 | OEM-A-29 | — | — | — |
| 18 | Analogue 8 | — | W52 | — | 0.5 | OEM-A-30 | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | — | — | — | — | — | — | — | — | — |
| 22 | PWM 4 | — | W35 | — | 0.5 | OEM-A-20 | — | — | — |
| 23 | PWM 5 | — | W36 | — | 0.5 | OEM-A-28 | — | — | — |
| 24 | PWM 6 | — | W40 | — | 0.5 | RLY1-R-COIL- | — | — | — |
| 25 | PWM 7 | — | W42 | — | 0.5 | OEM-C-11 | — | — | — |
| 26 | Permanent 12v | — | W4 | — | 0.85 | OEM-B-21 | — | — | — |
| 27 | Permanent 12v | — | — | — | — | — | — | — | — |
| 28 | — | — | — | — | — | — | — | — | — |
| 29 | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — |
| 32 | — | — | — | — | — | — | — | — | — |
| 33 | — | — | — | — | — | — | — | — | — |
| 34 | — | — | — | — | — | — | — | — | — |
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 | T4-C1-5 | PWM 1 | low_side_out | corroborated | |
| OEM-A-16 | Fuel pump relay (JDM) | low_side_out | T4-C1-4 | PWM 2 | low_side_out | single_source | |
| OEM-A-17 | A/C clutch relay | low_side_out | T4-C1-3 | 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 | T4-C3-22 | 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 | T4-C2-5 | Analogue 3 | analog_in | single_source | |
| OEM-A-24 | Starter switch signal | digital_in | T4-C2-15 | Digital 5 | digital_in | corroborated | |
| OEM-A-25 | Immobilizer code | — | — | — | — | single_source | |
| OEM-A-26 | Power steering load detect | digital_in | T4-C2-3 | Analogue 10 | analog_in | corroborated | |
| OEM-A-27 | A/C switch (request) | digital_in | T4-C2-16 | Analogue 11 | analog_in | corroborated | |
| OEM-A-28 | Air pump relay | low_side_out | T4-C3-23 | PWM 5 | low_side_out | corroborated | |
| OEM-A-29 | Fuel tank pressure sensor | analog_in | T4-C3-17 | Analogue 7 | analog_in | corroborated | |
| OEM-A-3 | Evap bypass solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-30 | Electrical load detector | analog_in | T4-C3-18 | Analogue 8 | 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 | T4-C2-4 | Digital 1 | digital_in | corroborated | |
| OEM-B-1 | Power source 1 (main relay) | power_in | RLY1-R-COIL+ + RLY1-R-IN + T4-C1-31 | Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Ignition 12v In | power_in + power_out | corroborated | |
| OEM-B-10 | Power ground 2 | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-B-11 | Injector 1 | injector_out | T4-C1-9 | Injector 1 | injector_out | corroborated | |
| OEM-B-12 | VTEC solenoid | high_side_out | RLY1-R-OUT | Relay contact output (switched +12 V to load) | power_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 | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-B-20 | Ground | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-B-21 | Backup power (battery constant) | power_in | T4-C3-26 | Permanent 12v | power_in | single_source | |
| OEM-B-22 | Ground | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-B-23 | Idle air control valve | low_side_out | T4-C3-10 | PWM 8 | low_side_out | corroborated | |
| OEM-B-24 | NC | — | — | — | — | unverified | |
| OEM-B-25 | NC | — | — | — | — | unverified | |
| OEM-B-3 | Injector 2 | injector_out | T4-C1-17 | Injector 2 | injector_out | corroborated | |
| OEM-B-4 | Injector 3 | injector_out | T4-C1-34 | Injector 3 | injector_out | corroborated | |
| OEM-B-5 | Injector 4 | injector_out | T4-C1-25 | 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 | RLY1-R-COIL+ + RLY1-R-IN + T4-C1-31 | Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Ignition 12v In | power_in + power_out | corroborated | |
| OEM-C-1 | Primary O2 heater | low_side_out | T4-C3-9 | Lambda 1 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 | T4-C3-25 | PWM 7 | low_side_out | single_source | |
| OEM-C-12 | Ignition coil 2 | ignition_out | T4-C1-18 | Coil 2 | ignition_out | corroborated | |
| OEM-C-13 | Ignition coil 3 | ignition_out | T4-C1-1 | Coil 3 | ignition_out | corroborated | |
| OEM-C-14 | Ignition coil 4 | ignition_out | T4-C1-26 | Coil 4 | ignition_out | corroborated | |
| OEM-C-15 | Secondary O2 sensor | lambda_nb_in | T4-C2-6 | Analogue 4 | analog_in | corroborated | |
| OEM-C-16 | Primary O2 sensor | lambda_nb_in | T4-C2-19 | Analogue 6 | analog_in | corroborated | |
| OEM-C-17 | MAP sensor | analog_in | T4-C2-10 | Analogue 1 | analog_in | corroborated | |
| OEM-C-18 | Sensor ground 2 | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-C-19 | Sensor 5V supply 1 (MAP) | vref | T4-C2-24 | 5v Output | vref | corroborated | |
| OEM-C-2 | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-C-20 | Cam (TDC1) sensor + | trigger_in | T4-C2-22 | Cam 1 | trigger_in | corroborated | |
| OEM-C-21 | Cam (TDC1) sensor − | trigger_in | T4-C2-21 + T4-C2-33 | 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 | T4-C2-34 | Analogue 9 | analog_in | single_source | |
| OEM-C-25 | Intake air temp sensor | temp_in | T4-C2-25 | Thermistor 2 | temp_in | corroborated | |
| OEM-C-26 | Coolant temp sensor | temp_in | T4-C2-7 | Thermistor 1 | temp_in | corroborated | |
| OEM-C-27 | Throttle position sensor | analog_in | T4-C2-1 | Analogue 2 | analog_in | corroborated | |
| OEM-C-28 | Sensor 5V supply 2 | vref | T4-C2-9 | 5v Output | vref | corroborated | |
| OEM-C-29 | Cam (TDC2) sensor + | trigger_in | T4-C2-2 | Wheel 1 | digital_in | corroborated | |
| OEM-C-3 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-30 | Cam (TDC2) sensor − | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-C-31 | Timing ground | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-4 | Ignition coil 1 | ignition_out | T4-C1-10 | Coil 1 | ignition_out | corroborated | |
| OEM-C-5 | Alternator FR signal | digital_in | T4-C2-14 | Digital 4 | digital_in | single_source | |
| OEM-C-6 | NC | — | — | — | — | unverified | |
| OEM-C-7 | Sensor ground 1 | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-C-8 | Crank sensor + (CKP+) | trigger_in | T4-C2-12 | Crank | trigger_in | corroborated | |
| OEM-C-9 | Crank sensor − (CKP−) | trigger_in | T4-C2-21 + T4-C2-33 | 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 | T4-C1-31 | 0.85 | no route | Ignition 12v In | — | |
| W4 | OEM-B-21 | T4-C3-26 | 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 | T4-C1-13 | 0.85 | no route | Power Ground 1 | — | |
| W10 | SP-GND-1 | T4-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 | T4-C2-21 | 0.5 | no route | Sensor Ground | — | |
| W16 | SP-0V-1 | T4-C2-33 | 0.5 | no route | Sensor Ground | — | |
| W17 | OEM-C-19 | T4-C2-24 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W18 | OEM-C-28 | T4-C2-9 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W19 | OEM-C-8 | T4-C2-12 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W20 | OEM-C-9 | SP-0V-1 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W21 | OEM-C-20 | T4-C2-22 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W22 | OEM-C-21 | SP-0V-1 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W23 | OEM-C-29 | T4-C2-2 | 0.5 | no route | Cam (TDC2) sensor + | — | |
| W24 | OEM-C-4 | T4-C1-10 | 0.5 | no route | Ignition coil 1 | — | |
| W25 | OEM-C-12 | T4-C1-18 | 0.5 | no route | Ignition coil 2 | — | |
| W26 | OEM-C-13 | T4-C1-1 | 0.5 | no route | Ignition coil 3 | — | |
| W27 | OEM-C-14 | T4-C1-26 | 0.5 | no route | Ignition coil 4 | — | |
| W28 | OEM-B-11 | T4-C1-9 | 0.5 | no route | Injector 1 | — | |
| W29 | OEM-B-3 | T4-C1-17 | 0.5 | no route | Injector 2 | — | |
| W30 | OEM-B-4 | T4-C1-34 | 0.5 | no route | Injector 3 | — | |
| W31 | OEM-B-5 | T4-C1-25 | 0.5 | no route | Injector 4 | — | |
| W32 | OEM-A-15 | T4-C1-5 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W33 | OEM-A-16 | T4-C1-4 | 0.5 | no route | Fuel pump relay (JDM) | — | |
| W34 | OEM-A-17 | T4-C1-3 | 0.5 | no route | A/C clutch relay | — | |
| W35 | OEM-A-20 | T4-C3-22 | 0.5 | no route | Radiator fan relay | — | |
| W36 | OEM-A-28 | T4-C3-23 | 0.5 | no route | Air pump relay | — | |
| W37 | OEM-B-12 | RLY1-R-OUT | 0.5 | no route | VTEC solenoid | — | |
| W38 | SP-14V-1 | RLY1-R-IN | 0.5 | no route | Relay contact input (switched +12 V) | — | |
| W39 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | no route | Relay coil positive (switched +12 V) | — | |
| W40 | RLY1-R-COIL- | T4-C3-24 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W41 | OEM-C-1 | T4-C3-9 | 0.5 | no route | Primary O2 heater | — | |
| W42 | OEM-C-11 | T4-C3-25 | 0.5 | no route | Secondary O2 heater control | — | |
| W43 | OEM-B-23 | T4-C3-10 | 0.5 | no route | Idle air control valve | — | |
| W44 | OEM-C-17 | T4-C2-10 | 0.5 | no route | MAP sensor | — | |
| W45 | OEM-C-27 | T4-C2-1 | 0.5 | no route | Throttle position sensor | — | |
| W46 | OEM-A-23 | T4-C2-5 | 0.5 | no route | Secondary O2 sensor | — | |
| W47 | OEM-C-15 | T4-C2-6 | 0.5 | no route | Secondary O2 sensor | — | |
| W48 | OEM-C-16 | T4-C2-19 | 0.5 | no route | Primary O2 sensor | — | |
| W49 | OEM-C-26 | T4-C2-7 | 0.5 | no route | Coolant temp sensor | — | |
| W50 | OEM-C-25 | T4-C2-25 | 0.5 | no route | Intake air temp sensor | — | |
| W51 | OEM-A-29 | T4-C3-17 | 0.5 | no route | Fuel tank pressure sensor | — | |
| W52 | OEM-A-30 | T4-C3-18 | 0.5 | no route | Electrical load detector | — | |
| W53 | OEM-C-24 | T4-C2-34 | 0.5 | no route | Air pump electric current sensor | — | |
| W54 | OEM-A-9 | T4-C2-4 | 0.5 | no route | Vehicle speed sensor | — | |
| W55 | OEM-C-5 | T4-C2-14 | 0.5 | no route | Alternator FR signal | — | |
| W56 | OEM-A-24 | T4-C2-15 | 0.5 | no route | Starter switch signal | — | |
| W57 | OEM-A-26 | T4-C2-3 | 0.5 | no route | Power steering load detect | — | |
| W58 | OEM-A-27 | T4-C2-16 | 0.5 | no route | A/C switch (request) | — |
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 | 3.000 | 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) | 43.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (14)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | T4-C3-27 | T4-C3-27 "Permanent 12v" is required but not wired. |
| warn | DATASET_GAP | T4 C1 | 20 of 34 cavities on T4 C1 have no pin data (2,6,7,8,11,12,15,16,19,20,21,22,23,24,27,28,29,30,32,33). Anything there is invisible to these checks. |
| warn | DATASET_GAP | T4 C2 | 11 of 34 cavities on T4 C2 have no pin data (8,11,13,18,20,23,27,29,30,31,32). Anything there is invisible to these checks. |
| warn | DATASET_GAP | T4 C3 | 20 of 34 cavities on T4 C3 have no pin data (1,2,3,4,5,6,13,14,15,16,19,20,21,28,29,30,31,32,33,34). Anything there is invisible to these checks. |
| warn | LOAD_UNKNOWN | RLY1-R-OUT | RLY1-R-OUT "Relay contact output (switched +12 V to load)" drives OEM-B-12 VTEC solenoid (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | T4-C1-17 | T4-C1-17 "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 | T4-C1-25 | T4-C1-25 "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 | T4-C1-34 | T4-C1-34 "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 | T4-C1-9 | T4-C1-9 "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-A-26 ↔ T4-C2-3 | OEM-A-26 "Power steering load detect" [digital_in] is wired to T4-C2-3 "Analogue 10" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-A-27 ↔ T4-C2-16 | OEM-A-27 "A/C switch (request)" [digital_in] is wired to T4-C2-16 "Analogue 11" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-C-29 ↔ T4-C2-2 | OEM-C-29 "Cam (TDC2) sensor +" [trigger_in] is wired to T4-C2-2 "Wheel 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| 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 | 17 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-25 Immobilizer code; OEM-A-3 Evap bypass solenoid; OEM-A-32 Brake switch; OEM-A-4 Evap canister vent shut valve; OEM-A-6 Evap canister purge valve; OEM-C-10 VTEC pressure switch; OEM-C-2 Alternator control; OEM-C-22 Knock sensor; OEM-C-3 Knock sensor |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-09. Review every wire against both manuals before building. Open items: - T4-C3 27: Permanent 12v: required by DTAFast T4 but no stock pin feeds it; wire by hand Not wired: - OEM-C 22: Knock sensor: no free knock input on DTAFast T4 - OEM-C 3: Knock sensor: no free knock input on DTAFast T4 - OEM-A 1: Coolant temp gauge drive: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 12: Immobilizer indicator light: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 18: Check engine light (MIL): no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 2: Air control valve solenoid: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 3: Evap bypass solenoid: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 4: Evap canister vent shut valve: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 6: Evap canister purge valve: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-C 2: Alternator control: no free low_side/ls_hs/injector/hbridge on DTAFast T4 - OEM-A 19: Tacho output: no free tacho/frequency_out/low_side/ls_hs on DTAFast T4 - OEM-A 32: Brake switch: no free switch_in/frequency_in/analog_0_5 on DTAFast T4 - OEM-C 10: VTEC pressure switch: no free switch_in/frequency_in/analog_0_5 on DTAFast T4 - OEM-A 21: K-Line: no free k_line on DTAFast T4 - 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 | Bosch relay catalogue (mini ISO relays) | https://www.bosch-ibusiness.com/media/downloads/kataloge/relay/2025_10_bosch_relay_catalogue.pdf | archive | 2026-10-05 | 20344cff1ef3 |
| 4 | vendor_doc | DTAFast T4 ECU wiring diagram | https://cdn.shopify.com/s/files/1/0848/7508/4108/files/T4_Wiring_Diagram.pdf?v=1789413067 | — | — | — |
| 4 | vendor_doc | Haltech KB: F20C (AP1) engine | https://support.haltech.com/portal/en/kb/articles/f20c-ap1-engine | — | 2026-10-05 | e804da29d014 |
| 4 | community_copy | Honda S2000 Service Manual 2000–2008, Fuel and Emissions Systems | https://www.s2000.wiki/view/images/7/7f/Service_Manual_2000-2008.pdf | archive | 2026-10-05 | a470cfc928e9 |
| 4 | vendor_doc | Link S2000 AP1 PlugIn installation manual | https://linkecu.com/documentation/S2000X.pdf | — | 2026-10-05 | d12b0ff3f006 |
| 4 | vendor_doc | Omron G8V-RH-1C7T-R-DC12 high-current micro 280 automotive relay datasheet | https://www.alldatasheet.com/datasheet-pdf/pdf/333797/OMRON/G8V-RH-1C7T-R-DC12.html | — | 2026-10-05 | 764a0505a941 |
| 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) | — | — | — | — |