MX-5 Miata Mazdaspeed 2004-05 (BP-ZET turbo, no VVT) → DTAFast T4 (auto)
MX-5 Miata Mazdaspeed 2004-05 (BP-ZET turbo, no VVT) — DTAFast — T4
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-17
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 | 53 wires · 11 connectors · 2 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-2-P | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | T4-C1-31 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-4-AG | T4-C3-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-4-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | T4-C1-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | T4-C1-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-4-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | T4-C2-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | T4-C2-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-4-L | T4-C2-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-3-Y | T4-C2-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-3-V | T4-C2-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-3-F | T4-C1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-3-I | T4-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-2-A | T4-C1-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-D | T4-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-G | T4-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-J | T4-C1-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-4-X | T4-C2-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-4-V | T4-C2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-4-P | T4-C2-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-2-B | T4-C1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-2-C | T4-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-K | T4-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-M | T4-C3-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-3-H | T4-C3-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-O | T4-C3-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-4-D | RLY1-R-OUT | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | SP-14V-1 | RLY1-R-IN | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | RLY1-R-COIL- | T4-C3-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-4-E | RLY2-R-OUT | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | SP-14V-1 | RLY2-R-IN | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | SP-14V-1 | RLY2-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | RLY2-R-COIL- | T4-C3-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-3-J | T4-C3-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-4-AE | T4-C2-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-4-AA | T4-C2-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-4-W | T4-C2-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-4-R | T4-C2-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-4-N | T4-C2-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-4-AD | T4-C3-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-3-T | T4-C2-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-3-S | T4-C2-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-4-B | T4-C2-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-4-C | T4-C2-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-4-F | T4-C3-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-4-H | T4-C2-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-4-I | T4-C2-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-4-J | 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 | RLY2-R-OUT | T4-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 5 | T4-C2-24 | T4-C2-21 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 6 | T4-C3-26 | T4-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 7 | RLY1-R-COIL+ | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | RLY1-R-OUT | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 9 | RLY2-R-OUT | T4-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 10 | T4-C1-13 | RLY1-R-OUT | open (OL) | power ground must not touch +12 V supply | |
| 11 | T4-C1-13 | RLY2-R-OUT | open (OL) | power ground must not touch +12 V supply | |
| 12 | T4-C1-13 | T4-C2-24 | open (OL) | power ground must not touch 5 V sensor reference | |
| 13 | T4-C1-13 | T4-C3-26 | open (OL) | power ground must not touch +12 V supply | |
| 14 | T4-C3-26 | T4-C2-24 | 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-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Injector 1 | — | W18 | — | 0.5 | T4-C1-9 | — | — | — |
| B | Cooling fan relay | — | W25 | — | 0.5 | T4-C1-5 | — | — | — |
| C | Condenser fan relay | — | W26 | — | 0.5 | T4-C1-4 | — | — | — |
| D | Injector 2 | — | W19 | — | 0.5 | T4-C1-17 | — | — | — |
| E | EGR valve | — | — | — | — | — | — | — | — |
| F | EGR valve | — | — | — | — | — | — | — | — |
| G | Injector 3 | — | W20 | — | 0.5 | T4-C1-34 | — | — | — |
| H | EGR valve | — | — | — | — | — | — | — | — |
| I | EGR valve | — | — | — | — | — | — | — | — |
| J | Injector 4 | — | W21 | — | 0.5 | T4-C1-25 | — | — | — |
| K | A/C clutch relay | — | W27 | — | 0.5 | T4-C1-3 | — | — | — |
| L | NC | — | — | — | — | — | — | — | — |
| M | Fuel pump relay | — | W28 | — | 0.5 | T4-C3-22 | — | — | — |
| N | VTCS solenoid (intake butterflies) | — | — | — | — | — | — | — | — |
| O | Fuel pump relay (non-immobiliser) | — | W30 | — | 0.5 | T4-C3-24 | — | — | — |
| P | ISC valve +14V feed | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| Q | ISC valve low side | — | — | — | — | — | — | — | — |
| R | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Purge solenoid valve | — | — | — | — | — | — | — | — |
| D | EGR boost solenoid | — | — | — | — | — | — | — | — |
| E | NC | — | — | — | — | — | — | — | — |
| F | Ignition 1 (coils 1+4, wasted spark) | — | W16 | — | 0.5 | T4-C1-10 | — | — | — |
| G | NC | — | — | — | — | — | — | — | — |
| H | Main relay | — | W29 | — | 0.5 | T4-C3-23 | — | — | — |
| I | Ignition 2 (coils 2+3, wasted spark) | — | W17 | — | 0.5 | T4-C1-18 | — | — | — |
| J | Front O2 heater | — | W39 | — | 0.5 | T4-C3-9 | — | — | — |
| K | EVAP leak detection pump | — | — | — | — | — | — | — | — |
| L | NC | — | — | — | — | — | — | — | — |
| M | Alternator control | — | — | — | — | — | — | — | — |
| N | NC | — | — | — | — | — | — | — | — |
| O | Tachometer output | — | — | — | — | — | — | — | — |
| P | Rear O2 heater | — | — | — | — | — | — | — | — |
| Q | Data link connector (K-line) | — | — | — | — | — | — | — | — |
| R | NC | — | — | — | — | — | — | — | — |
| S | Immobiliser | — | W47 | — | 0.5 | T4-C2-4 | — | — | — |
| T | Vehicle speed | — | W46 | — | 0.5 | T4-C2-2 | — | — | — |
| U | Charge lamp | — | — | — | — | — | — | — | — |
| V | Cam position (CMP) | — | W15 | — | 0.5 | T4-C2-22 | — | — | — |
| W | NC | — | — | — | — | — | — | — | — |
| X | NC | — | — | — | — | — | — | — | — |
| Y | Crank position (CKP) | — | W14 | — | 0.5 | T4-C2-12 | — | — | — |
| Z | NC | — | — | — | — | — | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| AA | Rear O2 signal | — | W41 | — | 0.5 | T4-C2-6 | — | — | — |
| AB | NC | — | — | — | — | — | — | — | — |
| AC | Data link connector (DLC TEN, turbo) | — | — | — | — | — | — | — | — |
| AD | Fuel level | — | W45 | — | 0.5 | T4-C3-17 | — | — | — |
| AE | BARO/MAP sensor (turbo boost pressure) | — | W40 | — | 0.5 | T4-C2-5 | — | — | — |
| AF | ECU power +14V (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| AG | Constant +12V | — | W4 | — | 0.85 | T4-C3-26 | — | — | — |
| AH | EVAP leak detection pump solenoid valve | — | — | — | — | — | — | — | — |
| B | Brake switch | — | W48 | — | 0.5 | T4-C2-14 | — | — | — |
| C | Power steering pressure switch | — | W49 | — | 0.5 | T4-C2-15 | — | — | — |
| D | Boost control solenoid (turbo) | — | W31 | — | 0.5 | RLY1-R-OUT | — | — | — |
| E | Boost control solenoid (turbo) | — | W35 | — | 0.5 | RLY2-R-OUT | — | — | — |
| F | A/C request | — | W50 | — | 0.5 | T4-C3-18 | — | — | — |
| G | NC | — | — | — | — | — | — | — | — |
| H | Neutral switch | — | W51 | — | 0.5 | T4-C2-34 | — | — | — |
| I | Clutch switch | — | W52 | — | 0.5 | T4-C2-3 | — | — | — |
| J | VTCS vacuum switch | — | W53 | — | 0.5 | T4-C2-16 | — | — | — |
| K | NC | — | — | — | — | — | — | — | — |
| L | +5V sensor supply | — | W13 | — | 0.5 | T4-C2-24 | — | — | — |
| M | Knock sensor | — | — | — | — | — | — | — | — |
| N | Intake air temperature (IAT) | — | W44 | — | 0.5 | T4-C2-17 | — | — | — |
| O | Signal ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Coolant temperature (ECT) | — | W24 | — | 0.5 | T4-C2-7 | — | — | — |
| Q | NC | — | — | — | — | — | — | — | — |
| R | Intake air temperature 2 (IAT2, turbo) | — | W43 | — | 0.5 | T4-C2-25 | — | — | — |
| S | Ignition switch (IG1) sense | — | — | — | — | — | — | — | — |
| T | Generator output voltage (terminal P) | — | — | — | — | — | — | — | — |
| U | NC | — | — | — | — | — | — | — | — |
| V | Throttle position (TPS) | — | W23 | — | 0.5 | T4-C2-1 | — | — | — |
| W | Front O2 signal | — | W42 | — | 0.5 | T4-C2-19 | — | — | — |
| X | Mass air flow (MAF) | — | W22 | — | 0.5 | T4-C2-10 | — | — | — |
| Y | NC | — | — | — | — | — | — | — | — |
| Z | TCM (automatic only) | — | — | — | — | — | — | — | — |
RLY1-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (switched +12 V) | — | W33 | — | 0.5 | SP-14V-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W34 | — | 0.5 | T4-C3-25 | — | — | — |
| IN | Relay contact input (switched +12 V) | — | W32 | — | 0.5 | SP-14V-1 | — | — | — |
| OUT | Relay contact output (switched +12 V to load) | — | W31 | — | 0.5 | OEM-4-D | — | — | — |
RLY2-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (switched +12 V) | — | W37 | — | 0.5 | SP-14V-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W38 | — | 0.5 | T4-C3-10 | — | — | — |
| IN | Relay contact input (switched +12 V) | — | W36 | — | 0.5 | SP-14V-1 | — | — | — |
| OUT | Relay contact output (switched +12 V to load) | — | W35 | — | 0.5 | OEM-4-E | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-4-O | — | — | — |
| 1 | — | — | W11 | — | 0.5 | T4-C2-21 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | T4-C2-33 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-2-P | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-4-AF | — | — | — |
| 1 | — | — | W3 | — | 0.85 | T4-C1-31 | — | — | — |
| 1 | — | — | W32 | — | 0.5 | RLY1-R-IN | — | — | — |
| 1 | — | — | W33 | — | 0.5 | RLY1-R-COIL+ | — | — | — |
| 1 | — | — | W36 | — | 0.5 | RLY2-R-IN | — | — | — |
| 1 | — | — | W37 | — | 0.5 | RLY2-R-COIL+ | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-4-A | — | — | — |
| 1 | — | — | W8 | — | 0.85 | T4-C1-13 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | T4-C1-14 | — | — | — |
T4-C1
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coil 3 | — | — | — | — | — | — | — | — |
| 2 | — | — | — | — | — | — | — | — | — |
| 3 | PWM 3 | — | W27 | — | 0.5 | OEM-2-K | — | — | — |
| 4 | PWM 2 | — | W26 | — | 0.5 | OEM-2-C | — | — | — |
| 5 | PWM 1 | — | W25 | — | 0.5 | OEM-2-B | — | — | — |
| 6 | — | — | — | — | — | — | — | — | — |
| 7 | — | — | — | — | — | — | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | Injector 1 | — | W18 | — | 0.5 | OEM-2-A | — | — | — |
| 10 | Coil 1 | — | W16 | — | 0.5 | OEM-3-F | — | — | — |
| 11 | — | — | — | — | — | — | — | — | — |
| 12 | — | — | — | — | — | — | — | — | — |
| 13 | Power Ground 1 | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Power Ground 2 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | — | — | — | — | — | — | — | — | — |
| 16 | — | — | — | — | — | — | — | — | — |
| 17 | Injector 2 | — | W19 | — | 0.5 | OEM-2-D | — | — | — |
| 18 | Coil 2 | — | W17 | — | 0.5 | OEM-3-I | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | — | — | — | — | — | — | — | — | — |
| 22 | — | — | — | — | — | — | — | — | — |
| 23 | — | — | — | — | — | — | — | — | — |
| 24 | — | — | — | — | — | — | — | — | — |
| 25 | Injector 4 | — | W21 | — | 0.5 | OEM-2-J | — | — | — |
| 26 | Coil 4 | — | — | — | — | — | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — |
| 28 | — | — | — | — | — | — | — | — | — |
| 29 | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — |
| 31 | Ignition 12v In | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 32 | — | — | — | — | — | — | — | — | — |
| 33 | — | — | — | — | — | — | — | — | — |
| 34 | Injector 3 | — | W20 | — | 0.5 | OEM-2-G | — | — | — |
T4-C2
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Analogue 2 | — | W23 | — | 0.5 | OEM-4-V | — | — | — |
| 2 | Wheel 1 | — | W46 | — | 0.5 | OEM-3-T | — | — | — |
| 3 | Analogue 10 | — | W52 | — | 0.5 | OEM-4-I | — | — | — |
| 4 | Digital 1 | — | W47 | — | 0.5 | OEM-3-S | — | — | — |
| 5 | Analogue 3 | — | W40 | — | 0.5 | OEM-4-AE | — | — | — |
| 6 | Analogue 4 | — | W41 | — | 0.5 | OEM-4-AA | — | — | — |
| 7 | Thermistor 1 | — | W24 | — | 0.5 | OEM-4-P | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | 5v Output | — | — | — | — | — | — | — | — |
| 10 | Analogue 1 | — | W22 | — | 0.5 | OEM-4-X | — | — | — |
| 11 | — | — | — | — | — | — | — | — | — |
| 12 | Crank | — | W14 | — | 0.5 | OEM-3-Y | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | Digital 4 | — | W48 | — | 0.5 | OEM-4-B | — | — | — |
| 15 | Digital 5 | — | W49 | — | 0.5 | OEM-4-C | — | — | — |
| 16 | Analogue 11 | — | W53 | — | 0.5 | OEM-4-J | — | — | — |
| 17 | Thermistor 3 | — | W44 | — | 0.5 | OEM-4-N | — | — | — |
| 18 | — | — | — | — | — | — | — | — | — |
| 19 | Analogue 6 | — | W42 | — | 0.5 | OEM-4-W | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | Sensor Ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Cam 1 | — | W15 | — | 0.5 | OEM-3-V | — | — | — |
| 23 | — | — | — | — | — | — | — | — | — |
| 24 | 5v Output | — | W13 | — | 0.5 | OEM-4-L | — | — | — |
| 25 | Thermistor 2 | — | W43 | — | 0.5 | OEM-4-R | — | — | — |
| 26 | CAN High | — | — | — | — | — | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — |
| 28 | CAN Low | — | — | — | — | — | — | — | — |
| 29 | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — |
| 32 | — | — | — | — | — | — | — | — | — |
| 33 | Sensor Ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Analogue 9 | — | W51 | — | 0.5 | OEM-4-H | — | — | — |
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 | — | W39 | — | 0.5 | OEM-3-J | — | — | — |
| 10 | PWM 8 | — | W38 | — | 0.5 | RLY2-R-COIL- | — | — | — |
| 11 | Lambda 1 Trim Resistor | — | — | — | — | — | — | — | — |
| 12 | Lambda 1 Nernst Voltage | — | — | — | — | — | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | — | — | — | — | — | — | — | — | — |
| 15 | — | — | — | — | — | — | — | — | — |
| 16 | — | — | — | — | — | — | — | — | — |
| 17 | Analogue 7 | — | W45 | — | 0.5 | OEM-4-AD | — | — | — |
| 18 | Analogue 8 | — | W50 | — | 0.5 | OEM-4-F | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — |
| 21 | — | — | — | — | — | — | — | — | — |
| 22 | PWM 4 | — | W28 | — | 0.5 | OEM-2-M | — | — | — |
| 23 | PWM 5 | — | W29 | — | 0.5 | OEM-3-H | — | — | — |
| 24 | PWM 6 | — | W30 | — | 0.5 | OEM-2-O | — | — | — |
| 25 | PWM 7 | — | W34 | — | 0.5 | RLY1-R-COIL- | — | — | — |
| 26 | Permanent 12v | — | W4 | — | 0.85 | OEM-4-AG | — | — | — |
| 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-2-A | Injector 1 | injector_out | T4-C1-9 | Injector 1 | injector_out | corroborated | |
| OEM-2-B | Cooling fan relay | low_side_out | T4-C1-5 | PWM 1 | low_side_out | corroborated | |
| OEM-2-C | Condenser fan relay | low_side_out | T4-C1-4 | PWM 2 | low_side_out | corroborated | |
| OEM-2-D | Injector 2 | injector_out | T4-C1-17 | Injector 2 | injector_out | corroborated | |
| OEM-2-E | EGR valve | low_side_out | — | — | — | corroborated | |
| OEM-2-F | EGR valve | low_side_out | — | — | — | corroborated | |
| OEM-2-G | Injector 3 | injector_out | T4-C1-34 | Injector 3 | injector_out | corroborated | |
| OEM-2-H | EGR valve | low_side_out | — | — | — | corroborated | |
| OEM-2-I | EGR valve | low_side_out | — | — | — | corroborated | |
| OEM-2-J | Injector 4 | injector_out | T4-C1-25 | Injector 4 | injector_out | corroborated | |
| OEM-2-K | A/C clutch relay | low_side_out | T4-C1-3 | PWM 3 | low_side_out | corroborated | |
| OEM-2-L | NC | — | — | — | — | single_source | |
| OEM-2-M | Fuel pump relay | low_side_out | T4-C3-22 | PWM 4 | low_side_out | corroborated | |
| OEM-2-N | VTCS solenoid (intake butterflies) | low_side_out | — | — | — | corroborated | |
| OEM-2-O | Fuel pump relay (non-immobiliser) | low_side_out | T4-C3-24 | PWM 6 | low_side_out | corroborated | |
| OEM-2-P | ISC valve +14V feed | power_in | RLY1-R-COIL+ + RLY1-R-IN + RLY2-R-COIL+ + RLY2-R-IN + T4-C1-31 | Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Ignition 12v In | power_in + power_out | corroborated | |
| OEM-2-Q | ISC valve low side | low_side_out | — | — | — | corroborated | |
| OEM-2-R | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | corroborated | |
| OEM-3-A | Power ground | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-3-B | Power ground | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-3-C | Purge solenoid valve | low_side_out | — | — | — | corroborated | |
| OEM-3-D | EGR boost solenoid | — | — | — | — | conflict | |
| OEM-3-E | NC | — | — | — | — | single_source | |
| OEM-3-F | Ignition 1 (coils 1+4, wasted spark) | ignition_out | T4-C1-10 | Coil 1 | ignition_out | corroborated | |
| OEM-3-G | NC | — | — | — | — | single_source | |
| OEM-3-H | Main relay | low_side_out | T4-C3-23 | PWM 5 | low_side_out | corroborated | |
| OEM-3-I | Ignition 2 (coils 2+3, wasted spark) | ignition_out | T4-C1-18 | Coil 2 | ignition_out | corroborated | |
| OEM-3-J | Front O2 heater | low_side_out | T4-C3-9 | Lambda 1 Heater Negative | low_side_out | corroborated | |
| OEM-3-K | EVAP leak detection pump | low_side_out | — | — | — | corroborated | |
| OEM-3-L | NC | — | — | — | — | single_source | |
| OEM-3-M | Alternator control | low_side_out | — | — | — | corroborated | |
| OEM-3-N | NC | — | — | — | — | single_source | |
| OEM-3-O | Tachometer output | tacho_out | — | — | — | corroborated | |
| OEM-3-P | Rear O2 heater | low_side_out | — | — | — | corroborated | |
| OEM-3-Q | Data link connector (K-line) | serial | — | — | — | corroborated | |
| OEM-3-R | NC | — | — | — | — | single_source | |
| OEM-3-S | Immobiliser | digital_in | T4-C2-4 | Digital 1 | digital_in | corroborated | |
| OEM-3-T | Vehicle speed | digital_in | T4-C2-2 | Wheel 1 | digital_in | corroborated | |
| OEM-3-U | Charge lamp | low_side_out | — | — | — | corroborated | |
| OEM-3-V | Cam position (CMP) | trigger_in | T4-C2-22 | Cam 1 | trigger_in | corroborated | |
| OEM-3-W | NC | — | — | — | — | single_source | |
| OEM-3-X | NC | — | — | — | — | single_source | |
| OEM-3-Y | Crank position (CKP) | trigger_in | T4-C2-12 | Crank | trigger_in | corroborated | |
| OEM-3-Z | NC | — | — | — | — | single_source | |
| OEM-4-A | Power ground | ground | T4-C1-13 + T4-C1-14 | Power Ground 1 + Power Ground 2 | ground | corroborated | |
| OEM-4-AA | Rear O2 signal | lambda_nb_in | T4-C2-6 | Analogue 4 | analog_in | corroborated | |
| OEM-4-AB | NC | — | — | — | — | single_source | |
| OEM-4-AC | Data link connector (DLC TEN, turbo) | serial | — | — | — | BrY | single_source |
| OEM-4-AD | Fuel level | analog_in | T4-C3-17 | Analogue 7 | analog_in | corroborated | |
| OEM-4-AE | BARO/MAP sensor (turbo boost pressure) | analog_in | T4-C2-5 | Analogue 3 | analog_in | LY | single_source |
| OEM-4-AF | ECU power +14V (main relay) | power_in | RLY1-R-COIL+ + RLY1-R-IN + RLY2-R-COIL+ + RLY2-R-IN + T4-C1-31 | Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Ignition 12v In | power_in + power_out | corroborated | |
| OEM-4-AG | Constant +12V | power_in | T4-C3-26 | Permanent 12v | power_in | corroborated | |
| OEM-4-AH | EVAP leak detection pump solenoid valve | low_side_out | — | — | — | corroborated | |
| OEM-4-B | Brake switch | digital_in | T4-C2-14 | Digital 4 | digital_in | corroborated | |
| OEM-4-C | Power steering pressure switch | digital_in | T4-C2-15 | Digital 5 | digital_in | corroborated | |
| OEM-4-D | Boost control solenoid (turbo) | high_side_out | RLY1-R-OUT | Relay contact output (switched +12 V to load) | power_out | Y | single_source |
| OEM-4-E | Boost control solenoid (turbo) | high_side_out | RLY2-R-OUT | Relay contact output (switched +12 V to load) | power_out | Y | single_source |
| OEM-4-F | A/C request | digital_in | T4-C3-18 | Analogue 8 | analog_in | corroborated | |
| OEM-4-G | NC | — | — | — | — | single_source | |
| OEM-4-H | Neutral switch | digital_in | T4-C2-34 | Analogue 9 | analog_in | corroborated | |
| OEM-4-I | Clutch switch | digital_in | T4-C2-3 | Analogue 10 | analog_in | corroborated | |
| OEM-4-J | VTCS vacuum switch | digital_in | T4-C2-16 | Analogue 11 | analog_in | corroborated | |
| OEM-4-K | NC | — | — | — | — | single_source | |
| OEM-4-L | +5V sensor supply | vref | T4-C2-24 | 5v Output | vref | corroborated | |
| OEM-4-M | Knock sensor | knock_in | — | — | — | corroborated | |
| OEM-4-N | Intake air temperature (IAT) | temp_in | T4-C2-17 | Thermistor 3 | temp_in | corroborated | |
| OEM-4-O | Signal ground | sensor_ground | T4-C2-21 + T4-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | corroborated | |
| OEM-4-P | Coolant temperature (ECT) | temp_in | T4-C2-7 | Thermistor 1 | temp_in | corroborated | |
| OEM-4-Q | NC | — | — | — | — | single_source | |
| OEM-4-R | Intake air temperature 2 (IAT2, turbo) | temp_in | T4-C2-25 | Thermistor 2 | temp_in | VY | single_source |
| OEM-4-S | Ignition switch (IG1) sense | digital_in | — | — | — | corroborated | |
| OEM-4-T | Generator output voltage (terminal P) | — | — | — | — | corroborated | |
| OEM-4-U | NC | — | — | — | — | single_source | |
| OEM-4-V | Throttle position (TPS) | analog_in | T4-C2-1 | Analogue 2 | analog_in | corroborated | |
| OEM-4-W | Front O2 signal | lambda_nb_in | T4-C2-19 | Analogue 6 | analog_in | corroborated | |
| OEM-4-X | Mass air flow (MAF) | analog_in | T4-C2-10 | Analogue 1 | analog_in | corroborated | |
| OEM-4-Y | NC | — | — | — | — | single_source | |
| OEM-4-Z | TCM (automatic only) | — | — | — | — | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W3 | SP-14V-1 | T4-C1-31 | 0.85 | no route | Ignition 12v In | — | |
| W4 | OEM-4-AG | T4-C3-26 | 0.85 | no route | Constant +12V | — | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-4-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | SP-GND-1 | T4-C1-13 | 0.85 | no route | Power Ground 1 | — | |
| W9 | SP-GND-1 | T4-C1-14 | 0.85 | no route | Power Ground 2 | — | |
| W10 | OEM-4-O | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W11 | SP-0V-1 | T4-C2-21 | 0.5 | no route | Sensor Ground | — | |
| W12 | SP-0V-1 | T4-C2-33 | 0.5 | no route | Sensor Ground | — | |
| W13 | OEM-4-L | T4-C2-24 | 0.5 | no route | +5V sensor supply | — | |
| W14 | OEM-3-Y | T4-C2-12 | 0.5 | no route | Crank position (CKP) | — | |
| W15 | OEM-3-V | T4-C2-22 | 0.5 | no route | Cam position (CMP) | — | |
| W16 | OEM-3-F | T4-C1-10 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W17 | OEM-3-I | T4-C1-18 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W18 | OEM-2-A | T4-C1-9 | 0.5 | no route | Injector 1 | — | |
| W19 | OEM-2-D | T4-C1-17 | 0.5 | no route | Injector 2 | — | |
| W20 | OEM-2-G | T4-C1-34 | 0.5 | no route | Injector 3 | — | |
| W21 | OEM-2-J | T4-C1-25 | 0.5 | no route | Injector 4 | — | |
| W22 | OEM-4-X | T4-C2-10 | 0.5 | no route | Mass air flow (MAF) | — | |
| W23 | OEM-4-V | T4-C2-1 | 0.5 | no route | Throttle position (TPS) | — | |
| W24 | OEM-4-P | T4-C2-7 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W25 | OEM-2-B | T4-C1-5 | 0.5 | no route | Cooling fan relay | — | |
| W26 | OEM-2-C | T4-C1-4 | 0.5 | no route | Condenser fan relay | — | |
| W27 | OEM-2-K | T4-C1-3 | 0.5 | no route | A/C clutch relay | — | |
| W28 | OEM-2-M | T4-C3-22 | 0.5 | no route | Fuel pump relay | — | |
| W29 | OEM-3-H | T4-C3-23 | 0.5 | no route | Main relay | — | |
| W30 | OEM-2-O | T4-C3-24 | 0.5 | no route | Fuel pump relay (non-immobiliser) | — | |
| W31 | OEM-4-D | RLY1-R-OUT | 0.5 | no route | Boost control solenoid (turbo) | — | |
| W32 | SP-14V-1 | RLY1-R-IN | 0.5 | no route | Relay contact input (switched +12 V) | — | |
| W33 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | no route | Relay coil positive (switched +12 V) | — | |
| W34 | RLY1-R-COIL- | T4-C3-25 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W35 | OEM-4-E | RLY2-R-OUT | 0.5 | no route | Boost control solenoid (turbo) | — | |
| W36 | SP-14V-1 | RLY2-R-IN | 0.5 | no route | Relay contact input (switched +12 V) | — | |
| W37 | SP-14V-1 | RLY2-R-COIL+ | 0.5 | no route | Relay coil positive (switched +12 V) | — | |
| W38 | RLY2-R-COIL- | T4-C3-10 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W39 | OEM-3-J | T4-C3-9 | 0.5 | no route | Front O2 heater | — | |
| W40 | OEM-4-AE | T4-C2-5 | 0.5 | no route | BARO/MAP sensor (turbo boost pressure) | — | |
| W41 | OEM-4-AA | T4-C2-6 | 0.5 | no route | Rear O2 signal | — | |
| W42 | OEM-4-W | T4-C2-19 | 0.5 | no route | Front O2 signal | — | |
| W43 | OEM-4-R | T4-C2-25 | 0.5 | no route | Intake air temperature 2 (IAT2, turbo) | — | |
| W44 | OEM-4-N | T4-C2-17 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W45 | OEM-4-AD | T4-C3-17 | 0.5 | no route | Fuel level | — | |
| W46 | OEM-3-T | T4-C2-2 | 0.5 | no route | Vehicle speed | — | |
| W47 | OEM-3-S | T4-C2-4 | 0.5 | no route | Immobiliser | — | |
| W48 | OEM-4-B | T4-C2-14 | 0.5 | no route | Brake switch | — | |
| W49 | OEM-4-C | T4-C2-15 | 0.5 | no route | Power steering pressure switch | — | |
| W50 | OEM-4-F | T4-C3-18 | 0.5 | no route | A/C request | — | |
| W51 | OEM-4-H | T4-C2-34 | 0.5 | no route | Neutral switch | — | |
| W52 | OEM-4-I | T4-C2-3 | 0.5 | no route | Clutch switch | — | |
| W53 | OEM-4-J | T4-C2-16 | 0.5 | no route | VTCS vacuum switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 3.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 41.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (9)
| 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 | NET_FAMILY | OEM-4-F ↔ T4-C3-18 | OEM-4-F "A/C request" [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-4-H ↔ T4-C2-34 | OEM-4-H "Neutral switch" [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-4-I ↔ T4-C2-3 | OEM-4-I "Clutch switch" [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-4-J ↔ T4-C2-16 | OEM-4-J "VTCS vacuum switch" [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. |
| info | UNMAPPED | OEM | 21 optional OEM pins are not mapped: OEM-2-E EGR valve; OEM-2-F EGR valve; OEM-2-H EGR valve; OEM-2-I EGR valve; OEM-2-N VTCS solenoid (intake butterflies); OEM-2-Q ISC valve low side; OEM-2-R Malfunction indicator lamp (MIL); OEM-3-C Purge solenoid valve; OEM-3-D EGR boost solenoid; OEM-3-K EVAP leak detection pump; OEM-3-M Alternator control; OEM-3-O Tachometer output; OEM-3-P Rear O2 heater; OEM-3-Q Data link connector (K-line); OEM-3-U Charge lamp; OEM-4-AC Data link connector (DLC TEN, turbo); OEM-4-AH EVAP leak detection pump solenoid valve; OEM-4-M Knock sensor; OEM-4-S Ignition switch (IG1) sense; OEM-4-T Generator output voltage (terminal P); OEM-4-Z TCM (automatic only) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Knock input count not found Auto-mapped by auto_map() from the library pin data on 2026-10-17. 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-4 M: Knock sensor: no free knock input on DTAFast T4 - OEM-4 S: Ignition switch (IG1) sense: 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-3 P: Rear O2 heater: no free heater_low_side/low_side/relay_control/ls_hs/injector on DTAFast T4 - OEM-2 Q: ISC valve low side: no free low_side/relay_control/heater_low_side/ls_hs/injector rated ≥ 1.0 A on DTAFast T4 - OEM-2 E: EGR valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-2 F: EGR valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-2 H: EGR valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-2 I: EGR valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-2 N: VTCS solenoid (intake butterflies): no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-2 R: Malfunction indicator lamp (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-3 C: Purge solenoid valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-3 K: EVAP leak detection pump: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-3 M: Alternator control: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-3 U: Charge lamp: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-4 AH: EVAP leak detection pump solenoid valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on DTAFast T4 - OEM-3 O: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on DTAFast T4 - OEM-3 Q: Data link connector (K-line): no free k_line on DTAFast T4 - OEM-4 AC: Data link connector (DLC TEN, turbo): no free k_line on DTAFast T4 - OEM-3 D: EGR boost solenoid: not classified in the library; wire by hand - OEM-4 T: Generator output voltage (terminal P): not classified in the library; wire by hand - OEM-4 Z: TCM (automatic only): not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | oem_manual | 2005 Mazda MX-5 Miata Engine Performance Control System (PCM terminal voltage reference, BP and BP WITH TC) | https://trull.org/alex/pubmirror/www.mellens.net/mazda/Mazda-Miata-2005/engine_control_system.pdf | — | — | — |
| 4 | vendor_doc | Adaptronic eSel039 Select Plugin ECU for Mazda MX5 / Miata NB8B/C (OEM ECU pinout) | https://www.miataturbo.net/attachments/ecus-tuning-54/04-msm-ecu-pinout-104032/nb8bc_oem_ecu_pinouts-224948d1602912806 | — | — | — |
| 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 | 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 G4X MX5NB2X install manual (NB2 2001-05) | https://linkecu.com/documentation/MX5XNB2.pdf | archive | 2026-10-05 | 741efdd9f2c8 |
| 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 |