RSX Type-S 2002-04 (K20A2) → DTAFast T4+ (auto)
RSX Type-S 2002-04 (K20A2) — 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 | 2: read the Findings page before cutting any wire |
| Size of the job | 57 wires · 10 connectors · 4 part lines |
| Tools | 715131-1 · wire strippers · multimeter · heat gun + heat-shrink |
| Terminals | 316836-1 |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-A-2 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-A-3 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | T4-C1-31 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-23 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-24 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-4 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-A-5 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-E-3 | 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-A-10 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-A-11 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-E-4 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | T4-C2-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | T4-C2-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A-20 | T4-C2-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-A-21 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-E-5 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-5V1-1 | T4-C2-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-A-7 | T4-C2-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-A-25 | T4-C2-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-A-26 | T4-C2-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-A-30 | T4-C1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-29 | T4-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-A-28 | T4-C1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A-27 | T4-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-B-5 | T4-C1-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-B-4 | T4-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-3 | T4-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B-2 | T4-C1-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-E-7 | T4-C1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-6 | T4-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-E-1 | T4-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-E-18 | T4-C3-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-E-8 | T4-C3-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-E-6 | T4-C3-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-1 | T4-C3-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-12 | T4-C3-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-B-15 | T4-C3-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-B-1 | T4-C1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-B-18 | T4-C1-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-6 | T4-C3-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-16 | T4-C3-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-19 | T4-C2-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-15 | T4-C2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-E-2 | T4-C2-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-B-8 | T4-C2-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-B-17 | T4-C2-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-B-13 | T4-C2-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-E-14 | T4-C2-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-E-15 | T4-C3-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-18 | T4-C2-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-B-10 | T4-C2-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-B-9 | T4-C2-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-E-16 | T4-C3-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-E-20 | T4-C2-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-E-22 | T4-C2-3 | 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 | T4-C1-31 | T4-C1-13 | open (OL) | +12 V supply must not touch power ground | |
| 2 | T4-C1-31 | T4-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | T4-C1-13 | T4-C2-24 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | T4-C1-13 | T4-C2-9 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | T4-C1-31 | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 6 | T4-C1-31 | T4-C2-9 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 7 | T4-C2-21 | T4-C2-24 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 8 | T4-C2-21 | T4-C2-9 | open (OL) | sensor ground 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 | A/F sensor heater control (AFSHTC) | — | W37 | — | 0.5 | T4-C3-24 | — | — | — |
| 2 | Ignition power 2 (IGP2) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | Ignition power 1 (IGP1) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Power ground 2 (PG2) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 5 | Power ground 1 (PG1) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | A/F sensor + (AFS+, wideband Ip) | — | W42 | — | 0.5 | T4-C3-7 | — | — | — |
| 7 | Crank position sensor (CKP) | — | W20 | — | 0.5 | T4-C2-12 | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | Knock sensor (KS) | — | — | — | — | — | — | — | — |
| 10 | Sensor ground 2 (SG2) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | Sensor ground 1 (SG1) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Idle air control valve (IACV) | — | W38 | — | 0.5 | T4-C3-25 | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | — | — | — | — | — | — | — | — | — |
| 15 | Throttle position sensor (TPS) | — | W45 | — | 0.5 | T4-C2-1 | — | — | — |
| 16 | A/F sensor - (AFS-, wideband Vs) | — | W43 | — | 0.5 | T4-C3-12 | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — |
| 18 | Vehicle speed sensor (VSS, M/T) | — | W52 | — | 0.5 | T4-C2-4 | — | — | — |
| 19 | Manifold absolute pressure (MAP) | — | W44 | — | 0.5 | T4-C2-10 | — | — | — |
| 20 | Sensor 5V supply 2 (VCC2) | — | W16 | — | 0.5 | T4-C2-24 | — | — | — |
| 21 | Sensor 5V supply 1 (VCC1) | — | W17 | — | 0.5 | SP-5V1-1 | — | — | — |
| 22 | A/F sensor heater supply (AFSHTC+) | — | — | — | — | — | — | — | — |
| 23 | Logic ground 2 (LG2) | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 24 | Logic ground 1 (LG1) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 25 | Camshaft position A (CMP A) | — | W21 | — | 0.5 | T4-C2-22 | — | — | — |
| 26 | Camshaft position B (CMP B) | — | W22 | — | 0.5 | T4-C2-2 | — | — | — |
| 27 | Ignition coil 4 (IGPLS4) | — | W26 | — | 0.5 | T4-C1-26 | — | — | — |
| 28 | Ignition coil 3 (IGPLS3) | — | W25 | — | 0.5 | T4-C1-1 | — | — | — |
| 29 | Ignition coil 2 (IGPLS2) | — | W24 | — | 0.5 | T4-C1-18 | — | — | — |
| 30 | Ignition coil 1 (IGPLS1) | — | W23 | — | 0.5 | T4-C1-10 | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — |
OEM-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | VTC oil control solenoid (+) | — | W40 | — | 0.5 | T4-C1-6 | — | — | — |
| 2 | Injector 4 (INJ4) | — | W30 | — | 0.5 | T4-C1-25 | — | — | — |
| 3 | Injector 3 (INJ3) | — | W29 | — | 0.5 | T4-C1-34 | — | — | — |
| 4 | Injector 2 (INJ2) | — | W28 | — | 0.5 | T4-C1-17 | — | — | — |
| 5 | Injector 1 (INJ1) | — | W27 | — | 0.5 | T4-C1-9 | — | — | — |
| 6 | Radiator fan control (FANC) | — | W32 | — | 0.5 | T4-C1-4 | — | — | — |
| 7 | Reverse lockout solenoid (RVS, Type-S) | — | — | — | — | — | — | — | — |
| 8 | Coolant temp sensor (ECT) | — | W47 | — | 0.5 | T4-C2-7 | — | — | — |
| 9 | VTEC oil pressure switch (VTPSW) | — | W54 | — | 0.5 | T4-C2-15 | — | — | — |
| 10 | Alternator L signal (ALTL) | — | W53 | — | 0.5 | T4-C2-14 | — | — | — |
| 11 | — | — | — | — | — | — | — | — | — |
| 12 | — | — | — | — | — | — | — | — | — |
| 13 | Alternator FR signal (ALTF) | — | W49 | — | 0.5 | T4-C2-6 | — | — | — |
| 14 | — | — | — | — | — | — | — | — | — |
| 15 | VTEC solenoid (VTS) | — | W39 | — | 0.5 | T4-C3-10 | — | — | — |
| 16 | — | — | — | — | — | — | — | — | — |
| 17 | Intake air temp sensor (IAT) | — | W48 | — | 0.5 | T4-C2-25 | — | — | — |
| 18 | Alternator control (ALTC) | — | W41 | — | 0.5 | T4-C1-7 | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | Evap canister purge valve (PCS) | — | — | — | — | — | — | — | — |
| 22 | — | — | — | — | — | — | — | — | — |
| 23 | VTC oil control solenoid (-) | — | — | — | — | — | — | — | — |
| 24 | — | — | — | — | — | — | — | — | — |
OEM-E
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Immobilizer fuel pump relay (IMO FPR) | — | W33 | — | 0.5 | T4-C1-3 | — | — | — |
| 2 | Secondary heated O2 sensor (SHO2S) | — | W46 | — | 0.5 | T4-C2-5 | — | — | — |
| 3 | Logic ground 3 (LG3) | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Sensor ground 3 (SG3) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Sensor 5V supply 3 (VCC3) | — | W18 | — | 0.5 | SP-5V1-1 | — | — | — |
| 6 | Secondary O2 heater control (SO2SHTC) | — | W36 | — | 0.5 | T4-C3-9 | — | — | — |
| 7 | Main relay control (MRLY) | — | W31 | — | 0.5 | T4-C1-5 | — | — | — |
| 8 | A/F sensor heater relay control (AFSHTCR) | — | W35 | — | 0.5 | T4-C3-23 | — | — | — |
| 9 | Ignition switch signal (IG1) | — | — | — | — | — | — | — | — |
| 10 | — | — | — | — | — | — | — | — | — |
| 11 | — | — | — | — | — | — | — | — | — |
| 12 | — | — | — | — | — | — | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | Fuel tank pressure sensor (FTP) | — | W50 | — | 0.5 | T4-C2-19 | — | — | — |
| 15 | Electrical load detector (ELD) | — | W51 | — | 0.5 | T4-C3-17 | — | — | — |
| 16 | Power steering pressure switch (PSPSW) | — | W55 | — | 0.5 | T4-C3-18 | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — |
| 18 | A/C clutch relay (ACC) | — | W34 | — | 0.5 | T4-C3-22 | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | Brake switch / interlock (2WBS) | — | W56 | — | 0.5 | T4-C2-34 | — | — | — |
| 21 | Evap vent shut valve (VSV) | — | — | — | — | — | — | — | — |
| 22 | Brake switch (BKSW) | — | W57 | — | 0.5 | T4-C2-3 | — | — | — |
| 23 | K-line (diagnostic) | — | — | — | — | — | — | — | — |
| 24 | Multiplex communication (SEFMJ) | — | — | — | — | — | — | — | — |
| 25 | — | — | — | — | — | — | — | — | — |
| 26 | Engine speed pulse / tacho (NEP) | — | — | — | — | — | — | — | — |
| 27 | Immobilizer code (IMOCD) | — | — | — | — | — | — | — | — |
| 28 | — | — | — | — | — | — | — | — | — |
| 29 | Service check signal (SCS) | — | — | — | — | — | — | — | — |
| 30 | Write enable signal (WEN) | — | — | — | — | — | — | — | — |
| 31 | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-A-10 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-A-11 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-E-4 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | T4-C2-21 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | T4-C2-33 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-2 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-A-3 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | T4-C1-31 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W17 | — | 0.5 | OEM-A-21 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-E-5 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | T4-C2-9 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-A-24 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-4 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-A-5 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-E-3 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | T4-C1-13 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | T4-C1-14 | — | — | — |
T4-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coil 3 | — | W25 | — | 0.5 | OEM-A-28 | — | — | — |
| 10 | Coil 1 | — | W23 | — | 0.5 | OEM-A-30 | — | — | — |
| 13 | Power Ground 1 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Power Ground 2 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 17 | Injector 2 | — | W28 | — | 0.5 | OEM-B-4 | — | — | — |
| 18 | Coil 2 | — | W24 | — | 0.5 | OEM-A-29 | — | — | — |
| 25 | Injector 4 | — | W30 | — | 0.5 | OEM-B-2 | — | — | — |
| 26 | Coil 4 | — | W26 | — | 0.5 | OEM-A-27 | — | — | — |
| 3 | PWM 3 | — | W33 | — | 0.5 | OEM-E-1 | — | — | — |
| 31 | Ignition 12v In | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 34 | Injector 3 | — | W29 | — | 0.5 | OEM-B-3 | — | — | — |
| 4 | PWM 2 | — | W32 | — | 0.5 | OEM-B-6 | — | — | — |
| 5 | PWM 1 | — | W31 | — | 0.5 | OEM-E-7 | — | — | — |
| 6 | Motor 1 + | — | W40 | — | 0.5 | OEM-B-1 | — | — | — |
| 7 | Motor 1 - | — | W41 | — | 0.5 | OEM-B-18 | — | — | — |
| 9 | Injector 1 | — | W27 | — | 0.5 | OEM-B-5 | — | — | — |
T4-C2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Analogue 2 | — | W45 | — | 0.5 | OEM-A-15 | — | — | — |
| 10 | Analogue 1 | — | W44 | — | 0.5 | OEM-A-19 | — | — | — |
| 12 | Crank | — | W20 | — | 0.5 | OEM-A-7 | — | — | — |
| 14 | Digital 4 | — | W53 | — | 0.5 | OEM-B-10 | — | — | — |
| 15 | Digital 5 | — | W54 | — | 0.5 | OEM-B-9 | — | — | — |
| 16 | Analogue 11 | — | — | — | — | — | — | — | — |
| 17 | Thermistor 3 | — | — | — | — | — | — | — | — |
| 19 | Analogue 6 | — | W50 | — | 0.5 | OEM-E-14 | — | — | — |
| 2 | Wheel 1 | — | W22 | — | 0.5 | OEM-A-26 | — | — | — |
| 21 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Cam 1 | — | W21 | — | 0.5 | OEM-A-25 | — | — | — |
| 24 | 5v Output | — | W16 | — | 0.5 | OEM-A-20 | — | — | — |
| 25 | Thermistor 2 | — | W48 | — | 0.5 | OEM-B-17 | — | — | — |
| 26 | CAN High | — | — | — | — | — | — | — | — |
| 28 | CAN Low | — | — | — | — | — | — | — | — |
| 3 | Analogue 10 | — | W57 | — | 0.5 | OEM-E-22 | — | — | — |
| 33 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Analogue 9 | — | W56 | — | 0.5 | OEM-E-20 | — | — | — |
| 4 | Digital 1 | — | W52 | — | 0.5 | OEM-A-18 | — | — | — |
| 5 | Analogue 3 | — | W46 | — | 0.5 | OEM-E-2 | — | — | — |
| 6 | Analogue 4 | — | W49 | — | 0.5 | OEM-B-13 | — | — | — |
| 7 | Thermistor 1 | — | W47 | — | 0.5 | OEM-B-8 | — | — | — |
| 9 | 5v Output | — | W19 | — | 0.5 | SP-5V1-1 | — | — | — |
T4-C3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | PWM 8 | — | W39 | — | 0.5 | OEM-B-15 | — | — | — |
| 11 | Lambda 1 Trim Resistor | — | — | — | — | — | — | — | — |
| 12 | Lambda 1 Nernst Voltage | — | W43 | — | 0.5 | OEM-A-16 | — | — | — |
| 17 | Analogue 7 | — | W51 | — | 0.5 | OEM-E-15 | — | — | — |
| 18 | Analogue 8 | — | W55 | — | 0.5 | OEM-E-16 | — | — | — |
| 22 | PWM 4 | — | W34 | — | 0.5 | OEM-E-18 | — | — | — |
| 23 | PWM 5 | — | W35 | — | 0.5 | OEM-E-8 | — | — | — |
| 24 | PWM 6 | — | W37 | — | 0.5 | OEM-A-1 | — | — | — |
| 25 | PWM 7 | — | W38 | — | 0.5 | OEM-A-12 | — | — | — |
| 26 | Permanent 12v | — | — | — | — | — | — | — | — |
| 27 | Permanent 12v | — | — | — | — | — | — | — | — |
| 7 | Lambda 1 Pump Current | — | W42 | — | 0.5 | OEM-A-6 | — | — | — |
| 8 | Lambda 1 VGND | — | — | — | — | — | — | — | — |
| 9 | Lambda 1 Heater Negative | — | W36 | — | 0.5 | OEM-E-6 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | A/F sensor heater control (AFSHTC) | low_side_out | T4-C3-24 | PWM 6 | low_side_out | single_source | |
| OEM-A-10 | Sensor ground 2 (SG2) | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-A-11 | Sensor ground 1 (SG1) | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-A-12 | Idle air control valve (IACV) | low_side_out | T4-C3-25 | PWM 7 | low_side_out | corroborated | |
| OEM-A-15 | Throttle position sensor (TPS) | analog_in | T4-C2-1 | Analogue 2 | analog_in | corroborated | |
| OEM-A-16 | A/F sensor - (AFS-, wideband Vs) | wb_vs | T4-C3-12 | Lambda 1 Nernst Voltage | wb_vs | single_source | |
| OEM-A-18 | Vehicle speed sensor (VSS, M/T) | digital_in | T4-C2-4 | Digital 1 | digital_in | corroborated | |
| OEM-A-19 | Manifold absolute pressure (MAP) | analog_in | T4-C2-10 | Analogue 1 | analog_in | corroborated | |
| OEM-A-2 | Ignition power 2 (IGP2) | power_in | T4-C1-31 | Ignition 12v In | power_in | corroborated | |
| OEM-A-20 | Sensor 5V supply 2 (VCC2) | vref | T4-C2-24 | 5v Output | vref | corroborated | |
| OEM-A-21 | Sensor 5V supply 1 (VCC1) | vref | T4-C2-9 | 5v Output | vref | corroborated | |
| OEM-A-22 | A/F sensor heater supply (AFSHTC+) | power_out | — | — | — | single_source | |
| OEM-A-23 | Logic ground 2 (LG2) | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-A-24 | Logic ground 1 (LG1) | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-A-25 | Camshaft position A (CMP A) | trigger_in | T4-C2-22 | Cam 1 | trigger_in | single_source | |
| OEM-A-26 | Camshaft position B (CMP B) | trigger_in | T4-C2-2 | Wheel 1 | digital_in | single_source | |
| OEM-A-27 | Ignition coil 4 (IGPLS4) | ignition_out | T4-C1-26 | Coil 4 | ignition_out | corroborated | |
| OEM-A-28 | Ignition coil 3 (IGPLS3) | ignition_out | T4-C1-1 | Coil 3 | ignition_out | corroborated | |
| OEM-A-29 | Ignition coil 2 (IGPLS2) | ignition_out | T4-C1-18 | Coil 2 | ignition_out | corroborated | |
| OEM-A-3 | Ignition power 1 (IGP1) | power_in | T4-C1-31 | Ignition 12v In | power_in | corroborated | |
| OEM-A-30 | Ignition coil 1 (IGPLS1) | ignition_out | T4-C1-10 | Coil 1 | ignition_out | corroborated | |
| OEM-A-4 | Power ground 2 (PG2) | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-A-5 | Power ground 1 (PG1) | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-A-6 | A/F sensor + (AFS+, wideband Ip) | wb_ip | T4-C3-7 | Lambda 1 Pump Current | wb_ip | single_source | |
| OEM-A-7 | Crank position sensor (CKP) | trigger_in | T4-C2-12 | Crank | trigger_in | corroborated | |
| OEM-A-9 | Knock sensor (KS) | knock_in | — | — | — | corroborated | |
| OEM-B-1 | VTC oil control solenoid (+) | low_side_out | T4-C1-6 | Motor 1 + | hbridge_out | corroborated | |
| OEM-B-10 | Alternator L signal (ALTL) | digital_in | T4-C2-14 | Digital 4 | digital_in | single_source | |
| OEM-B-13 | Alternator FR signal (ALTF) | analog_in | T4-C2-6 | Analogue 4 | analog_in | single_source | |
| OEM-B-15 | VTEC solenoid (VTS) | low_side_out | T4-C3-10 | PWM 8 | low_side_out | single_source | |
| OEM-B-17 | Intake air temp sensor (IAT) | temp_in | T4-C2-25 | Thermistor 2 | temp_in | corroborated | |
| OEM-B-18 | Alternator control (ALTC) | low_side_out | T4-C1-7 | Motor 1 - | hbridge_out | corroborated | |
| OEM-B-2 | Injector 4 (INJ4) | injector_out | T4-C1-25 | Injector 4 | injector_out | corroborated | |
| OEM-B-21 | Evap canister purge valve (PCS) | low_side_out | — | — | — | corroborated | |
| OEM-B-23 | VTC oil control solenoid (-) | low_side_out | — | — | — | corroborated | |
| OEM-B-3 | Injector 3 (INJ3) | injector_out | T4-C1-34 | Injector 3 | injector_out | corroborated | |
| OEM-B-4 | Injector 2 (INJ2) | injector_out | T4-C1-17 | Injector 2 | injector_out | corroborated | |
| OEM-B-5 | Injector 1 (INJ1) | injector_out | T4-C1-9 | Injector 1 | injector_out | corroborated | |
| OEM-B-6 | Radiator fan control (FANC) | low_side_out | T4-C1-4 | PWM 2 | low_side_out | corroborated | |
| OEM-B-7 | Reverse lockout solenoid (RVS, Type-S) | low_side_out | — | — | — | corroborated | |
| OEM-B-8 | Coolant temp sensor (ECT) | temp_in | T4-C2-7 | Thermistor 1 | temp_in | corroborated | |
| OEM-B-9 | VTEC oil pressure switch (VTPSW) | digital_in | T4-C2-15 | Digital 5 | digital_in | corroborated | |
| OEM-E-1 | Immobilizer fuel pump relay (IMO FPR) | low_side_out | T4-C1-3 | PWM 3 | low_side_out | corroborated | |
| OEM-E-14 | Fuel tank pressure sensor (FTP) | analog_in | T4-C2-19 | Analogue 6 | analog_in | corroborated | |
| OEM-E-15 | Electrical load detector (ELD) | analog_in | T4-C3-17 | Analogue 7 | analog_in | corroborated | |
| OEM-E-16 | Power steering pressure switch (PSPSW) | digital_in | T4-C3-18 | Analogue 8 | analog_in | corroborated | |
| OEM-E-18 | A/C clutch relay (ACC) | low_side_out | T4-C3-22 | PWM 4 | low_side_out | corroborated | |
| OEM-E-2 | Secondary heated O2 sensor (SHO2S) | lambda_nb_in | T4-C2-5 | Analogue 3 | analog_in | corroborated | |
| OEM-E-20 | Brake switch / interlock (2WBS) | digital_in | T4-C2-34 | Analogue 9 | analog_in | single_source | |
| OEM-E-21 | Evap vent shut valve (VSV) | low_side_out | — | — | — | corroborated | |
| OEM-E-22 | Brake switch (BKSW) | digital_in | T4-C2-3 | Analogue 10 | analog_in | corroborated | |
| OEM-E-23 | K-line (diagnostic) | serial | — | — | — | single_source | |
| OEM-E-24 | Multiplex communication (SEFMJ) | serial | — | — | — | corroborated | |
| OEM-E-26 | Engine speed pulse / tacho (NEP) | tacho_out | — | — | — | corroborated | |
| OEM-E-27 | Immobilizer code (IMOCD) | — | — | — | — | single_source | |
| OEM-E-29 | Service check signal (SCS) | — | — | — | — | single_source | |
| OEM-E-3 | Logic ground 3 (LG3) | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-E-30 | Write enable signal (WEN) | — | — | — | — | single_source | |
| OEM-E-31 | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | corroborated | |
| OEM-E-4 | Sensor ground 3 (SG3) | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-E-5 | Sensor 5V supply 3 (VCC3) | vref | T4-C2-9 | 5v Output | vref | corroborated | |
| OEM-E-6 | Secondary O2 heater control (SO2SHTC) | low_side_out | T4-C3-9 | Lambda 1 Heater Negative | low_side_out | corroborated | |
| OEM-E-7 | Main relay control (MRLY) | low_side_out | T4-C1-5 | PWM 1 | low_side_out | corroborated | |
| OEM-E-8 | A/F sensor heater relay control (AFSHTCR) | low_side_out | T4-C3-23 | PWM 5 | low_side_out | corroborated | |
| OEM-E-9 | Ignition switch signal (IG1) | digital_in | — | — | — | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-2 | SP-14V-1 | 0.85 | no route | Ignition power 2 (IGP2) | — | |
| W2 | OEM-A-3 | SP-14V-1 | 0.85 | no route | Ignition power 1 (IGP1) | — | |
| W3 | SP-14V-1 | T4-C1-31 | 0.85 | no route | Ignition 12v In | — | |
| W4 | OEM-A-23 | SP-GND-1 | 0.85 | no route | Logic ground 2 (LG2) | — | |
| W5 | OEM-A-24 | SP-GND-1 | 0.85 | no route | Logic ground 1 (LG1) | — | |
| W6 | OEM-A-4 | SP-GND-1 | 0.85 | no route | Power ground 2 (PG2) | — | |
| W7 | OEM-A-5 | SP-GND-1 | 0.85 | no route | Power ground 1 (PG1) | — | |
| W8 | OEM-E-3 | SP-GND-1 | 0.85 | no route | Logic ground 3 (LG3) | — | |
| 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-A-10 | SP-0V-1 | 0.5 | no route | Sensor ground 2 (SG2) | — | |
| W12 | OEM-A-11 | SP-0V-1 | 0.5 | no route | Sensor ground 1 (SG1) | — | |
| W13 | OEM-E-4 | SP-0V-1 | 0.5 | no route | Sensor ground 3 (SG3) | — | |
| W14 | SP-0V-1 | T4-C2-21 | 0.5 | no route | Sensor Ground | — | |
| W15 | SP-0V-1 | T4-C2-33 | 0.5 | no route | Sensor Ground | — | |
| W16 | OEM-A-20 | T4-C2-24 | 0.5 | no route | Sensor 5V supply 2 (VCC2) | — | |
| W17 | OEM-A-21 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply 1 (VCC1) | — | |
| W18 | OEM-E-5 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply 3 (VCC3) | — | |
| W19 | SP-5V1-1 | T4-C2-9 | 0.5 | no route | 5v Output | — | |
| W20 | OEM-A-7 | T4-C2-12 | 0.5 | no route | Crank position sensor (CKP) | — | |
| W21 | OEM-A-25 | T4-C2-22 | 0.5 | no route | Camshaft position A (CMP A) | — | |
| W22 | OEM-A-26 | T4-C2-2 | 0.5 | no route | Camshaft position B (CMP B) | — | |
| W23 | OEM-A-30 | T4-C1-10 | 0.5 | no route | Ignition coil 1 (IGPLS1) | — | |
| W24 | OEM-A-29 | T4-C1-18 | 0.5 | no route | Ignition coil 2 (IGPLS2) | — | |
| W25 | OEM-A-28 | T4-C1-1 | 0.5 | no route | Ignition coil 3 (IGPLS3) | — | |
| W26 | OEM-A-27 | T4-C1-26 | 0.5 | no route | Ignition coil 4 (IGPLS4) | — | |
| W27 | OEM-B-5 | T4-C1-9 | 0.5 | no route | Injector 1 (INJ1) | — | |
| W28 | OEM-B-4 | T4-C1-17 | 0.5 | no route | Injector 2 (INJ2) | — | |
| W29 | OEM-B-3 | T4-C1-34 | 0.5 | no route | Injector 3 (INJ3) | — | |
| W30 | OEM-B-2 | T4-C1-25 | 0.5 | no route | Injector 4 (INJ4) | — | |
| W31 | OEM-E-7 | T4-C1-5 | 0.5 | no route | Main relay control (MRLY) | — | |
| W32 | OEM-B-6 | T4-C1-4 | 0.5 | no route | Radiator fan control (FANC) | — | |
| W33 | OEM-E-1 | T4-C1-3 | 0.5 | no route | Immobilizer fuel pump relay (IMO FPR) | — | |
| W34 | OEM-E-18 | T4-C3-22 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W35 | OEM-E-8 | T4-C3-23 | 0.5 | no route | A/F sensor heater relay control (AFSHTCR) | — | |
| W36 | OEM-E-6 | T4-C3-9 | 0.5 | no route | Secondary O2 heater control (SO2SHTC) | — | |
| W37 | OEM-A-1 | T4-C3-24 | 0.5 | no route | A/F sensor heater control (AFSHTC) | — | |
| W38 | OEM-A-12 | T4-C3-25 | 0.5 | no route | Idle air control valve (IACV) | — | |
| W39 | OEM-B-15 | T4-C3-10 | 0.5 | no route | VTEC solenoid (VTS) | — | |
| W40 | OEM-B-1 | T4-C1-6 | 0.5 | no route | VTC oil control solenoid (+) | — | |
| W41 | OEM-B-18 | T4-C1-7 | 0.5 | no route | Alternator control (ALTC) | — | |
| W42 | OEM-A-6 | T4-C3-7 | 0.5 | no route | A/F sensor + (AFS+, wideband Ip) | — | |
| W43 | OEM-A-16 | T4-C3-12 | 0.5 | no route | A/F sensor - (AFS-, wideband Vs) | — | |
| W44 | OEM-A-19 | T4-C2-10 | 0.5 | no route | Manifold absolute pressure (MAP) | — | |
| W45 | OEM-A-15 | T4-C2-1 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W46 | OEM-E-2 | T4-C2-5 | 0.5 | no route | Secondary heated O2 sensor (SHO2S) | — | |
| W47 | OEM-B-8 | T4-C2-7 | 0.5 | no route | Coolant temp sensor (ECT) | — | |
| W48 | OEM-B-17 | T4-C2-25 | 0.5 | no route | Intake air temp sensor (IAT) | — | |
| W49 | OEM-B-13 | T4-C2-6 | 0.5 | no route | Alternator FR signal (ALTF) | — | |
| W50 | OEM-E-14 | T4-C2-19 | 0.5 | no route | Fuel tank pressure sensor (FTP) | — | |
| W51 | OEM-E-15 | T4-C3-17 | 0.5 | no route | Electrical load detector (ELD) | — | |
| W52 | OEM-A-18 | T4-C2-4 | 0.5 | no route | Vehicle speed sensor (VSS, M/T) | — | |
| W53 | OEM-B-10 | T4-C2-14 | 0.5 | no route | Alternator L signal (ALTL) | — | |
| W54 | OEM-B-9 | T4-C2-15 | 0.5 | no route | VTEC oil pressure switch (VTPSW) | — | |
| W55 | OEM-E-16 | T4-C3-18 | 0.5 | no route | Power steering pressure switch (PSPSW) | — | |
| W56 | OEM-E-20 | T4-C2-34 | 0.5 | no route | Brake switch / interlock (2WBS) | — | |
| W57 | OEM-E-22 | T4-C2-3 | 0.5 | no route | Brake switch (BKSW) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 1318682-6 | TE | K-series ECU harness plug A (040-3 HD plug assy, 31P) | 1.000 | ea |
| connector | 353029-1 | TE | K-series ECU harness plug B (040 H/D-3 plug HSG assy, 24P) | 1.000 | ea |
| connector | 353826-1 | TE | K-series ECU harness plug E (040 HD 31P plug HSG assy-B, 31P) | 1.000 | ea |
| terminal | 316836-1 | TE | Multilock 040 III HD socket, tin, 22–18 AWG (0.3–0.85 mm²) | 51.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (17)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | T4-C3-26 | T4-C3-26 "Permanent 12v" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | T4-C3-27 | T4-C3-27 "Permanent 12v" is required but not wired. |
| warn | DATASET_GAP | RSX ECU A | 5 of 31 cavities on RSX ECU A have no pin data (8,13,14,17,31). Anything there is invisible to these checks. |
| warn | DATASET_GAP | RSX ECU B | 8 of 24 cavities on RSX ECU B have no pin data (11,12,14,16,19,20,22,24). Anything there is invisible to these checks. |
| warn | DATASET_GAP | RSX ECU E | 8 of 31 cavities on RSX ECU E have no pin data (10,11,12,13,17,19,25,28). Anything there is invisible to these checks. |
| warn | LOAD_UNKNOWN | T4-C1-17 | T4-C1-17 "Injector 2" drives OEM-B-4 Injector 2 (INJ2) (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-2 Injector 4 (INJ4) (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-3 Injector 3 (INJ3) (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-5 Injector 1 (INJ1) (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-A-26 ↔ T4-C2-2 | OEM-A-26 "Camshaft position B (CMP B)" [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. |
| warn | NET_FAMILY | OEM-B-1 ↔ T4-C1-6 | OEM-B-1 "VTC oil control solenoid (+)" [low_side_out] is wired to T4-C1-6 "Motor 1 +" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-B-18 ↔ T4-C1-7 | OEM-B-18 "Alternator control (ALTC)" [low_side_out] is wired to T4-C1-7 "Motor 1 -" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-E-16 ↔ T4-C3-18 | OEM-E-16 "Power steering pressure switch (PSPSW)" [digital_in] is wired to T4-C3-18 "Analogue 8" [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-E-20 ↔ T4-C2-34 | OEM-E-20 "Brake switch / interlock (2WBS)" [digital_in] is wired to T4-C2-34 "Analogue 9" [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-E-22 ↔ T4-C2-3 | OEM-E-22 "Brake switch (BKSW)" [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 | SUPPLY_GROUP | OEM-A-21 + OEM-E-5 + SP-5V1-1 + T4-C2-9 | Supplies meant to stay independent share one net: OEM-A-21 [k_vcc1], OEM-E-5 [k_vcc3]. 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 | UNMAPPED | OEM | 14 optional OEM pins are not mapped: OEM-A-22 A/F sensor heater supply (AFSHTC+); OEM-A-9 Knock sensor (KS); OEM-B-21 Evap canister purge valve (PCS); OEM-B-23 VTC oil control solenoid (-); OEM-B-7 Reverse lockout solenoid (RVS, Type-S); OEM-E-21 Evap vent shut valve (VSV); OEM-E-23 K-line (diagnostic); OEM-E-24 Multiplex communication (SEFMJ); OEM-E-26 Engine speed pulse / tacho (NEP); OEM-E-27 Immobilizer code (IMOCD); OEM-E-29 Service check signal (SCS); OEM-E-30 Write enable signal (WEN); OEM-E-31 Malfunction indicator lamp (MIL); OEM-E-9 Ignition switch signal (IG1) |
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 26: Permanent 12v: required by DTAFast T4+ but no stock pin feeds it; wire by hand - T4-C3 27: Permanent 12v: required by DTAFast T4+ but no stock pin feeds it; wire by hand Not wired: - OEM-A 9: Knock sensor (KS): no free knock input on DTAFast T4+ - OEM-E 9: Ignition switch signal (IG1): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); DTAFast T4+ has no dedicated key-on input - OEM-B 21: Evap canister purge valve (PCS): no free low_side/ls_hs/injector/hbridge on DTAFast T4+ - OEM-B 23: VTC oil control solenoid (-): no free low_side/ls_hs/injector/hbridge on DTAFast T4+ - OEM-B 7: Reverse lockout solenoid (RVS, Type-S): no free low_side/ls_hs/injector/hbridge on DTAFast T4+ - OEM-E 21: Evap vent shut valve (VSV): no free low_side/ls_hs/injector/hbridge on DTAFast T4+ - OEM-E 31: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on DTAFast T4+ - OEM-E 26: Engine speed pulse / tacho (NEP): no free tacho/frequency_out/low_side/ls_hs on DTAFast T4+ - OEM-A 22: A/F sensor heater supply (AFSHTC+): no free heater_feed on DTAFast T4+ - OEM-E 23: K-line (diagnostic): no free k_line on DTAFast T4+ - OEM-E 24: Multiplex communication (SEFMJ): no free k_line on DTAFast T4+ - OEM-E 27: Immobilizer code (IMOCD): not classified in the library; wire by hand - OEM-E 29: Service check signal (SCS): not classified in the library; wire by hand - OEM-E 30: Write enable signal (WEN): not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | DTAFast T4+ ECU wiring diagram | https://cdn.shopify.com/s/files/1/0848/7508/4108/files/T4PLUS_Wiring_Diagram.pdf?v=1789412534 | — | — | — |
| 4 | vendor_doc | Link: CIVICLink K20X (HC20X) DC5 installation manual | https://linkecu.com/documentation/237-4000%20DC5.pdf | archive | 2026-10-05 | 8a1a71301571 |
| 3 | forum | FFS TechNet: K-series 02-06 RSX ECU pin diagram (Helm) | https://ff-squad.com/technet2/k-series-02-06-rsx-ecu-pin-diagram/ | archive | 2026-10-05 | b2b85002666e |