Lexus LS400 1989-97 (1UZ-FE non-VVTi) → DTAFast T12 (auto)
Lexus LS400 1989-97 (1UZ-FE non-VVTi) — DTAFast — T12
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
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 | 60 wires · 10 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-A-12 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-A-13 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | T12-C1-31 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-B-26 | T12-C3-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-22 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-D-13 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-D-26 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | T12-C1-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | T12-C1-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-C-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | T12-C2-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | T12-C2-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-11 | T12-C2-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-C-8 | T12-C2-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C-7 | T12-C2-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-6 | T12-C2-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C-3 | T12-C3-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-11 | T12-C3-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-5 | T12-C1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-13 | T12-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-D-12 | T12-C1-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-D-11 | T12-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-24 | T12-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-D-25 | T12-C1-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-A-4 | T12-C2-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A-5 | T12-C2-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-4 | T12-C1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B-6 | T12-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-7 | T12-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-D-19 | T12-C3-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-D-20 | T12-C3-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-D-17 | T12-C3-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-D-8 | T12-C3-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-D-7 | T12-C3-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-D-6 | T12-C3-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-D-5 | T12-C3-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-B-5 | T12-C3-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-B-8 | T12-C3-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-D-21 | T12-C3-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-D-22 | T12-C3-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-D-4 | T12-C1-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-17 | T12-C2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-6 | T12-C2-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-B-11 | T12-C2-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-B-24 | T12-C2-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-16 | T12-C2-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-7 | T12-C2-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-C-2 | T12-C2-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-C-10 | T12-C2-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-19 | T12-C2-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A-9 | T12-C2-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-A-20 | T12-C2-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-A-14 | T12-C2-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-2 | T12-C2-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-B-19 | T12-C2-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-B-20 | T12-C2-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-B-23 | T12-C3-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-C-1 | T12-C3-20 | 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 | T12-C1-31 | T12-C1-13 | open (OL) | +12 V supply must not touch power ground | |
| 2 | T12-C1-31 | T12-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | T12-C2-24 | T12-C1-13 | open (OL) | 5 V sensor reference must not touch power ground | |
| 4 | T12-C2-24 | T12-C2-21 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 5 | T12-C1-13 | T12-C3-26 | open (OL) | power ground must not touch +12 V supply | |
| 6 | T12-C2-21 | T12-C3-26 | open (OL) | sensor ground must not touch +12 V supply | |
| 7 | T12-C2-24 | T12-C1-31 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 8 | T12-C2-24 | T12-C3-26 | open (OL) | 5 V sensor reference must not touch +12 V supply |
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
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition switch (IGSW) | — | — | — | — | — | — | — | — |
| 11 | Sensor supply +5V (VC) | — | W15 | — | 0.5 | T12-C2-24 | — | — | — |
| 12 | EFI main relay (B+) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 13 | EFI main relay (B1+) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Neutral start switch (NSW) | — | W55 | — | 0.5 | T12-C2-11 | — | — | — |
| 16 | Intake air temperature (THA) | — | W48 | — | 0.5 | T12-C2-25 | — | — | — |
| 17 | O2 right front (OXR1) | — | W44 | — | 0.5 | T12-C2-1 | — | — | — |
| 18 | Sensor ground (E2) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Vehicle speed (SPD) | — | W52 | — | 0.5 | T12-C2-31 | — | — | — |
| 2 | Starter signal (STA) | — | W56 | — | 0.5 | T12-C2-14 | — | — | — |
| 20 | Diagnostic test 2 (TE2) | — | W54 | — | 0.5 | T12-C2-8 | — | — | — |
| 22 | Power ground (E1) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Throttle position (VTA1) | — | W27 | — | 0.5 | T12-C2-10 | — | — | — |
| 5 | Coolant temperature (THW) | — | W28 | — | 0.5 | T12-C2-7 | — | — | — |
| 6 | O2 left front (OXL1) | — | W45 | — | 0.5 | T12-C2-5 | — | — | — |
| 7 | EGR temperature sensor | — | W49 | — | 0.5 | T12-C2-17 | — | — | — |
| 8 | Knock/shield (KS) | — | — | — | — | — | — | — | — |
| 9 | Diagnostic test 1 (TE1) | — | W53 | — | 0.5 | T12-C2-4 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | O2 right rear (OXR2) | — | W46 | — | 0.5 | T12-C2-6 | — | — | — |
| 19 | Stop light switch (BK) | — | W57 | — | 0.5 | T12-C2-15 | — | — | — |
| 20 | A/T kickdown switch (KD) | — | W58 | — | 0.5 | T12-C2-27 | — | — | — |
| 23 | A/C request (AC) | — | W59 | — | 0.5 | T12-C3-19 | — | — | — |
| 24 | O2 left rear (OXL2) | — | W47 | — | 0.5 | T12-C2-18 | — | — | — |
| 26 | Battery constant (BATT) | — | W4 | — | 0.85 | T12-C3-26 | — | — | — |
| 4 | EFI main relay control (MREL) | — | W29 | — | 0.5 | T12-C1-5 | — | — | — |
| 5 | Check-engine lamp (W) | — | W39 | — | 0.5 | T12-C3-4 | — | — | — |
| 6 | Fuel pump relay (FPR) | — | W30 | — | 0.5 | T12-C1-4 | — | — | — |
| 7 | A/C clutch relay (ACMG) | — | W31 | — | 0.5 | T12-C1-3 | — | — | — |
| 8 | Fuel pump control (FC) | — | W40 | — | 0.5 | T12-C3-28 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | TPS idle switch (IDL) | — | W60 | — | 0.5 | T12-C3-20 | — | — | — |
| 10 | Igniter 2 feedback (IGF2) | — | W51 | — | 0.5 | T12-C2-20 | — | — | — |
| 11 | Knock sensor 2 (KNK2) | — | W20 | — | 0.5 | T12-C3-32 | — | — | — |
| 12 | Check connector VF2 | — | — | — | — | — | — | — | — |
| 13 | Ignition 2 (IGT2) | — | W22 | — | 0.5 | T12-C1-18 | — | — | — |
| 15 | Cam sensor ground (G-) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Crank sensor - (NE-) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Igniter 1 feedback (IGF1) | — | W50 | — | 0.5 | T12-C2-2 | — | — | — |
| 3 | Knock sensor 1 (KNK1) | — | W19 | — | 0.5 | T12-C3-31 | — | — | — |
| 4 | Check connector VF1 | — | — | — | — | — | — | — | — |
| 5 | Ignition 1 (IGT1) | — | W21 | — | 0.5 | T12-C1-10 | — | — | — |
| 6 | Cam sensor 2 + (G2+) | — | W18 | — | 0.5 | T12-C2-29 | — | — | — |
| 7 | Cam sensor 1 + (G1+) | — | W17 | — | 0.5 | T12-C2-22 | — | — | — |
| 8 | Crank sensor + (NE+) | — | W16 | — | 0.5 | T12-C2-12 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Injector 2&8 (#20) | — | W24 | — | 0.5 | T12-C1-17 | — | — | — |
| 12 | Injector 1&7 (#10) | — | W23 | — | 0.5 | T12-C1-9 | — | — | — |
| 13 | Power ground (E01) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 17 | Cold start injector 1 (STJ1) | — | W34 | — | 0.5 | T12-C3-22 | — | — | — |
| 19 | O2 heater 2 (HT2) | — | W32 | — | 0.5 | T12-C3-9 | — | — | — |
| 20 | O2 heater 1 (HT1) | — | W33 | — | 0.5 | T12-C3-3 | — | — | — |
| 21 | EGR solenoid | — | W41 | — | 0.5 | T12-C3-29 | — | — | — |
| 22 | Fuel pressure-up VSV (PR) | — | W42 | — | 0.5 | T12-C3-30 | — | — | — |
| 24 | Injector 3&5 (#40) | — | W25 | — | 0.5 | T12-C1-34 | — | — | — |
| 25 | Injector 4&6 (#30) | — | W26 | — | 0.5 | T12-C1-25 | — | — | — |
| 26 | Power ground (E02) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Cold start injector (STJ) | — | W43 | — | 0.5 | T12-C1-16 | — | — | — |
| 5 | ISC stepper coil 4 (ISC4) | — | W38 | — | 0.5 | T12-C3-10 | — | — | — |
| 6 | ISC stepper coil 3 (ISC3) | — | W37 | — | 0.5 | T12-C3-25 | — | — | — |
| 7 | ISC stepper coil 2 (ISC2) | — | W36 | — | 0.5 | T12-C3-24 | — | — | — |
| 8 | ISC stepper coil 1 (ISC1) | — | W35 | — | 0.5 | T12-C3-23 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-A-18 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-C-15 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-C-16 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | T12-C2-21 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | T12-C2-33 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-12 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-A-13 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | T12-C1-31 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.85 | T12-C1-14 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-A-22 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-D-13 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-D-26 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | T12-C1-13 | — | — | — |
T12-C1
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coil 3 | — | — | — | — | — | — | — | — |
| 2 | Coil 11 | — | — | — | — | — | — | — | — |
| 3 | PWM 3 | — | W31 | — | 0.5 | OEM-B-7 | — | — | — |
| 4 | PWM 2 | — | W30 | — | 0.5 | OEM-B-6 | — | — | — |
| 5 | PWM 1 | — | W29 | — | 0.5 | OEM-B-4 | — | — | — |
| 6 | Motor 1 + | — | — | — | — | — | — | — | — |
| 7 | Motor 1 - | — | — | — | — | — | — | — | — |
| 8 | Injector 11 | — | — | — | — | — | — | — | — |
| 9 | Injector 1 | — | W23 | — | 0.5 | OEM-D-12 | — | — | — |
| 10 | Coil 1 | — | W21 | — | 0.5 | OEM-C-5 | — | — | — |
| 11 | Coil 5 | — | — | — | — | — | — | — | — |
| 12 | Coil 7 | — | — | — | — | — | — | — | — |
| 13 | Power Ground 1 | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Power Ground 2 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Injector 6 | — | — | — | — | — | — | — | — |
| 16 | Injector 5 | — | W43 | — | 0.5 | OEM-D-4 | — | — | — |
| 17 | Injector 2 | — | W24 | — | 0.5 | OEM-D-11 | — | — | — |
| 18 | Coil 2 | — | W22 | — | 0.5 | OEM-C-13 | — | — | — |
| 19 | Coil 8 | — | — | — | — | — | — | — | — |
| 20 | Coil 9 | — | — | — | — | — | — | — | — |
| 21 | Injector 9 | — | — | — | — | — | — | — | — |
| 22 | Injector 10 | — | — | — | — | — | — | — | — |
| 23 | Injector 8 | — | — | — | — | — | — | — | — |
| 24 | Injector 7 | — | — | — | — | — | — | — | — |
| 25 | Injector 4 | — | W26 | — | 0.5 | OEM-D-25 | — | — | — |
| 26 | Coil 4 | — | — | — | — | — | — | — | — |
| 27 | Coil 6 | — | — | — | — | — | — | — | — |
| 28 | Coil 10 | — | — | — | — | — | — | — | — |
| 29 | Motor 2 + | — | — | — | — | — | — | — | — |
| 30 | Motor 2 - | — | — | — | — | — | — | — | — |
| 31 | Ignition 12v In | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 32 | Injector 12 | — | — | — | — | — | — | — | — |
| 33 | Coil 12 | — | — | — | — | — | — | — | — |
| 34 | Injector 3 | — | W25 | — | 0.5 | OEM-D-24 | — | — | — |
T12-C2
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Analogue 2 | — | W44 | — | 0.5 | OEM-A-17 | — | — | — |
| 2 | Wheel 1 | — | W50 | — | 0.5 | OEM-C-2 | — | — | — |
| 3 | Analogue 10 | — | — | — | — | — | — | — | — |
| 4 | Digital 1 | — | W53 | — | 0.5 | OEM-A-9 | — | — | — |
| 5 | Analogue 3 | — | W45 | — | 0.5 | OEM-A-6 | — | — | — |
| 6 | Analogue 4 | — | W46 | — | 0.5 | OEM-B-11 | — | — | — |
| 7 | Thermistor 1 | — | W28 | — | 0.5 | OEM-A-5 | — | — | — |
| 8 | Digital 2 | — | W54 | — | 0.5 | OEM-A-20 | — | — | — |
| 9 | 5v Output | — | — | — | — | — | — | — | — |
| 10 | Analogue 1 | — | W27 | — | 0.5 | OEM-A-4 | — | — | — |
| 11 | Digital 3 | — | W55 | — | 0.5 | OEM-A-14 | — | — | — |
| 12 | Crank | — | W16 | — | 0.5 | OEM-C-8 | — | — | — |
| 13 | Analogue 12 | — | — | — | — | — | — | — | — |
| 14 | Digital 4 | — | W56 | — | 0.5 | OEM-A-2 | — | — | — |
| 15 | Digital 5 | — | W57 | — | 0.5 | OEM-B-19 | — | — | — |
| 16 | Analogue 11 | — | — | — | — | — | — | — | — |
| 17 | Thermistor 3 | — | W49 | — | 0.5 | OEM-A-7 | — | — | — |
| 18 | Analogue 5 | — | W47 | — | 0.5 | OEM-B-24 | — | — | — |
| 19 | Analogue 6 | — | — | — | — | — | — | — | — |
| 20 | Wheel 2 | — | W51 | — | 0.5 | OEM-C-10 | — | — | — |
| 21 | Sensor Ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Cam 1 | — | W17 | — | 0.5 | OEM-C-7 | — | — | — |
| 23 | Cam 3 | — | — | — | — | — | — | — | — |
| 24 | 5v Output | — | W15 | — | 0.5 | OEM-A-11 | — | — | — |
| 25 | Thermistor 2 | — | W48 | — | 0.5 | OEM-A-16 | — | — | — |
| 26 | CAN High | — | — | — | — | — | — | — | — |
| 27 | Digital 6 | — | W58 | — | 0.5 | OEM-B-20 | — | — | — |
| 28 | CAN Low | — | — | — | — | — | — | — | — |
| 29 | Cam 2 | — | W18 | — | 0.5 | OEM-C-6 | — | — | — |
| 30 | Cam 4 | — | — | — | — | — | — | — | — |
| 31 | Wheel 3 | — | W52 | — | 0.5 | OEM-A-19 | — | — | — |
| 32 | Wheel 4 | — | — | — | — | — | — | — | — |
| 33 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Analogue 9 | — | — | — | — | — | — | — | — |
T12-C3
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Lambda 2 Pump Current | — | — | — | — | — | — | — | — |
| 2 | Lambda 2 VGND | — | — | — | — | — | — | — | — |
| 3 | Lambda 2 Heater Negative | — | W33 | — | 0.5 | OEM-D-20 | — | — | — |
| 4 | PWM 9 | — | W39 | — | 0.5 | OEM-B-5 | — | — | — |
| 5 | Lambda 2 Trim Resistor | — | — | — | — | — | — | — | — |
| 6 | Lambda 2 Nernst Voltage | — | — | — | — | — | — | — | — |
| 7 | Lambda 1 Pump Current | — | — | — | — | — | — | — | — |
| 8 | Lambda 1 VGND | — | — | — | — | — | — | — | — |
| 9 | Lambda 1 Heater Negative | — | W32 | — | 0.5 | OEM-D-19 | — | — | — |
| 10 | PWM 8 | — | W38 | — | 0.5 | OEM-D-5 | — | — | — |
| 11 | Lambda 1 Trim Resistor | — | — | — | — | — | — | — | — |
| 12 | Lambda 1 Nernst Voltage | — | — | — | — | — | — | — | — |
| 13 | Analogue 13 | — | — | — | — | — | — | — | — |
| 14 | Analogue 14 | — | — | — | — | — | — | — | — |
| 15 | Analogue 15 | — | — | — | — | — | — | — | — |
| 16 | Analogue 16 | — | — | — | — | — | — | — | — |
| 17 | Analogue 7 | — | — | — | — | — | — | — | — |
| 18 | Analogue 8 | — | — | — | — | — | — | — | — |
| 19 | Digital 7 | — | W59 | — | 0.5 | OEM-B-23 | — | — | — |
| 20 | Digital 8 | — | W60 | — | 0.5 | OEM-C-1 | — | — | — |
| 21 | Digital 9 | — | — | — | — | — | — | — | — |
| 22 | PWM 4 | — | W34 | — | 0.5 | OEM-D-17 | — | — | — |
| 23 | PWM 5 | — | W35 | — | 0.5 | OEM-D-8 | — | — | — |
| 24 | PWM 6 | — | W36 | — | 0.5 | OEM-D-7 | — | — | — |
| 25 | PWM 7 | — | W37 | — | 0.5 | OEM-D-6 | — | — | — |
| 26 | Permanent 12v | — | W4 | — | 0.85 | OEM-B-26 | — | — | — |
| 27 | Permanent 12v | — | — | — | — | — | — | — | — |
| 28 | PWM 10 | — | W40 | — | 0.5 | OEM-B-8 | — | — | — |
| 29 | PWM 11 | — | W41 | — | 0.5 | OEM-D-21 | — | — | — |
| 30 | PWM 12 | — | W42 | — | 0.5 | OEM-D-22 | — | — | — |
| 31 | Knock 1 | — | W19 | — | 0.5 | OEM-C-3 | — | — | — |
| 32 | Knock 2 | — | W20 | — | 0.5 | OEM-C-11 | — | — | — |
| 33 | CAN 2 High | — | — | — | — | — | — | — | — |
| 34 | CAN 2 Low | — | — | — | — | — | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Ignition switch (IGSW) | digital_in | — | — | — | single_source | |
| OEM-A-11 | Sensor supply +5V (VC) | vref | T12-C2-24 | 5v Output | vref | single_source | |
| OEM-A-12 | EFI main relay (B+) | power_in | T12-C1-31 | Ignition 12v In | power_in | single_source | |
| OEM-A-13 | EFI main relay (B1+) | power_in | T12-C1-31 | Ignition 12v In | power_in | single_source | |
| OEM-A-14 | Neutral start switch (NSW) | digital_in | T12-C2-11 | Digital 3 | digital_in | single_source | |
| OEM-A-16 | Intake air temperature (THA) | temp_in | T12-C2-25 | Thermistor 2 | temp_in | single_source | |
| OEM-A-17 | O2 right front (OXR1) | lambda_nb_in | T12-C2-1 | Analogue 2 | analog_in | single_source | |
| OEM-A-18 | Sensor ground (E2) | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-19 | Vehicle speed (SPD) | digital_in | T12-C2-31 | Wheel 3 | digital_in | single_source | |
| OEM-A-2 | Starter signal (STA) | digital_in | T12-C2-14 | Digital 4 | digital_in | single_source | |
| OEM-A-20 | Diagnostic test 2 (TE2) | digital_in | T12-C2-8 | Digital 2 | digital_in | single_source | |
| OEM-A-22 | Power ground (E1) | ground | T12-C1-13 + T12-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-A-4 | Throttle position (VTA1) | analog_in | T12-C2-10 | Analogue 1 | analog_in | single_source | |
| OEM-A-5 | Coolant temperature (THW) | temp_in | T12-C2-7 | Thermistor 1 | temp_in | single_source | |
| OEM-A-6 | O2 left front (OXL1) | lambda_nb_in | T12-C2-5 | Analogue 3 | analog_in | single_source | |
| OEM-A-7 | EGR temperature sensor | temp_in | T12-C2-17 | Thermistor 3 | temp_in | single_source | |
| OEM-A-8 | Knock/shield (KS) | knock_in | — | — | — | single_source | |
| OEM-A-9 | Diagnostic test 1 (TE1) | digital_in | T12-C2-4 | Digital 1 | digital_in | single_source | |
| OEM-B-11 | O2 right rear (OXR2) | lambda_nb_in | T12-C2-6 | Analogue 4 | analog_in | single_source | |
| OEM-B-19 | Stop light switch (BK) | digital_in | T12-C2-15 | Digital 5 | digital_in | single_source | |
| OEM-B-20 | A/T kickdown switch (KD) | digital_in | T12-C2-27 | Digital 6 | digital_in | single_source | |
| OEM-B-23 | A/C request (AC) | digital_in | T12-C3-19 | Digital 7 | digital_in | single_source | |
| OEM-B-24 | O2 left rear (OXL2) | lambda_nb_in | T12-C2-18 | Analogue 5 | analog_in | single_source | |
| OEM-B-26 | Battery constant (BATT) | power_in | T12-C3-26 | Permanent 12v | power_in | single_source | |
| OEM-B-4 | EFI main relay control (MREL) | low_side_out | T12-C1-5 | PWM 1 | low_side_out | single_source | |
| OEM-B-5 | Check-engine lamp (W) | low_side_out | T12-C3-4 | PWM 9 | low_side_out | single_source | |
| OEM-B-6 | Fuel pump relay (FPR) | low_side_out | T12-C1-4 | PWM 2 | low_side_out | single_source | |
| OEM-B-7 | A/C clutch relay (ACMG) | low_side_out | T12-C1-3 | PWM 3 | low_side_out | single_source | |
| OEM-B-8 | Fuel pump control (FC) | low_side_out | T12-C3-28 | PWM 10 | low_side_out | single_source | |
| OEM-C-1 | TPS idle switch (IDL) | digital_in | T12-C3-20 | Digital 8 | digital_in | single_source | |
| OEM-C-10 | Igniter 2 feedback (IGF2) | digital_in | T12-C2-20 | Wheel 2 | digital_in | single_source | |
| OEM-C-11 | Knock sensor 2 (KNK2) | knock_in | T12-C3-32 | Knock 2 | knock_in | single_source | |
| OEM-C-12 | Check connector VF2 | analog_out | — | — | — | single_source | |
| OEM-C-13 | Ignition 2 (IGT2) | ignition_out | T12-C1-18 | Coil 2 | ignition_out | single_source | |
| OEM-C-15 | Cam sensor ground (G-) | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-16 | Crank sensor - (NE-) | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-2 | Igniter 1 feedback (IGF1) | digital_in | T12-C2-2 | Wheel 1 | digital_in | single_source | |
| OEM-C-3 | Knock sensor 1 (KNK1) | knock_in | T12-C3-31 | Knock 1 | knock_in | single_source | |
| OEM-C-4 | Check connector VF1 | analog_out | — | — | — | single_source | |
| OEM-C-5 | Ignition 1 (IGT1) | ignition_out | T12-C1-10 | Coil 1 | ignition_out | single_source | |
| OEM-C-6 | Cam sensor 2 + (G2+) | trigger_in | T12-C2-29 | Cam 2 | trigger_in | single_source | |
| OEM-C-7 | Cam sensor 1 + (G1+) | trigger_in | T12-C2-22 | Cam 1 | trigger_in | single_source | |
| OEM-C-8 | Crank sensor + (NE+) | trigger_in | T12-C2-12 | Crank | trigger_in | single_source | |
| OEM-D-11 | Injector 2&8 (#20) | injector_out | T12-C1-17 | Injector 2 | injector_out | single_source | |
| OEM-D-12 | Injector 1&7 (#10) | injector_out | T12-C1-9 | Injector 1 | injector_out | single_source | |
| OEM-D-13 | Power ground (E01) | ground | T12-C1-13 + T12-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-D-17 | Cold start injector 1 (STJ1) | low_side_out | T12-C3-22 | PWM 4 | low_side_out | single_source | |
| OEM-D-19 | O2 heater 2 (HT2) | low_side_out | T12-C3-9 | Lambda 1 Heater Negative | low_side_out | single_source | |
| OEM-D-20 | O2 heater 1 (HT1) | low_side_out | T12-C3-3 | Lambda 2 Heater Negative | low_side_out | single_source | |
| OEM-D-21 | EGR solenoid | low_side_out | T12-C3-29 | PWM 11 | low_side_out | single_source | |
| OEM-D-22 | Fuel pressure-up VSV (PR) | low_side_out | T12-C3-30 | PWM 12 | low_side_out | single_source | |
| OEM-D-24 | Injector 3&5 (#40) | injector_out | T12-C1-34 | Injector 3 | injector_out | single_source | |
| OEM-D-25 | Injector 4&6 (#30) | injector_out | T12-C1-25 | Injector 4 | injector_out | single_source | |
| OEM-D-26 | Power ground (E02) | ground | T12-C1-13 + T12-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-D-4 | Cold start injector (STJ) | low_side_out | T12-C1-16 | Injector 5 | injector_out | single_source | |
| OEM-D-5 | ISC stepper coil 4 (ISC4) | low_side_out | T12-C3-10 | PWM 8 | low_side_out | single_source | |
| OEM-D-6 | ISC stepper coil 3 (ISC3) | low_side_out | T12-C3-25 | PWM 7 | low_side_out | single_source | |
| OEM-D-7 | ISC stepper coil 2 (ISC2) | low_side_out | T12-C3-24 | PWM 6 | low_side_out | single_source | |
| OEM-D-8 | ISC stepper coil 1 (ISC1) | low_side_out | T12-C3-23 | PWM 5 | low_side_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-12 | SP-14V-1 | 0.85 | no route | EFI main relay (B+) | — | |
| W2 | OEM-A-13 | SP-14V-1 | 0.85 | no route | EFI main relay (B1+) | — | |
| W3 | SP-14V-1 | T12-C1-31 | 0.85 | no route | Ignition 12v In | — | |
| W4 | OEM-B-26 | T12-C3-26 | 0.85 | no route | Battery constant (BATT) | — | |
| W5 | OEM-A-22 | SP-GND-1 | 0.85 | no route | Power ground (E1) | — | |
| W6 | OEM-D-13 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W7 | OEM-D-26 | SP-GND-1 | 0.85 | no route | Power ground (E02) | — | |
| W8 | SP-GND-1 | T12-C1-13 | 0.85 | no route | Power Ground 1 | — | |
| W9 | SP-GND-1 | T12-C1-14 | 0.85 | no route | Power Ground 2 | — | |
| W10 | OEM-A-18 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W11 | OEM-C-15 | SP-0V-1 | 0.5 | no route | Cam sensor ground (G-) | — | |
| W12 | OEM-C-16 | SP-0V-1 | 0.5 | no route | Crank sensor - (NE-) | — | |
| W13 | SP-0V-1 | T12-C2-21 | 0.5 | no route | Sensor Ground | — | |
| W14 | SP-0V-1 | T12-C2-33 | 0.5 | no route | Sensor Ground | — | |
| W15 | OEM-A-11 | T12-C2-24 | 0.5 | no route | Sensor supply +5V (VC) | — | |
| W16 | OEM-C-8 | T12-C2-12 | 0.5 | no route | Crank sensor + (NE+) | — | |
| W17 | OEM-C-7 | T12-C2-22 | 0.5 | no route | Cam sensor 1 + (G1+) | — | |
| W18 | OEM-C-6 | T12-C2-29 | 0.5 | no route | Cam sensor 2 + (G2+) | — | |
| W19 | OEM-C-3 | T12-C3-31 | 0.5 | no route | Knock sensor 1 (KNK1) | — | |
| W20 | OEM-C-11 | T12-C3-32 | 0.5 | no route | Knock sensor 2 (KNK2) | — | |
| W21 | OEM-C-5 | T12-C1-10 | 0.5 | no route | Ignition 1 (IGT1) | — | |
| W22 | OEM-C-13 | T12-C1-18 | 0.5 | no route | Ignition 2 (IGT2) | — | |
| W23 | OEM-D-12 | T12-C1-9 | 0.5 | no route | Injector 1&7 (#10) | — | |
| W24 | OEM-D-11 | T12-C1-17 | 0.5 | no route | Injector 2&8 (#20) | — | |
| W25 | OEM-D-24 | T12-C1-34 | 0.5 | no route | Injector 3&5 (#40) | — | |
| W26 | OEM-D-25 | T12-C1-25 | 0.5 | no route | Injector 4&6 (#30) | — | |
| W27 | OEM-A-4 | T12-C2-10 | 0.5 | no route | Throttle position (VTA1) | — | |
| W28 | OEM-A-5 | T12-C2-7 | 0.5 | no route | Coolant temperature (THW) | — | |
| W29 | OEM-B-4 | T12-C1-5 | 0.5 | no route | EFI main relay control (MREL) | — | |
| W30 | OEM-B-6 | T12-C1-4 | 0.5 | no route | Fuel pump relay (FPR) | — | |
| W31 | OEM-B-7 | T12-C1-3 | 0.5 | no route | A/C clutch relay (ACMG) | — | |
| W32 | OEM-D-19 | T12-C3-9 | 0.5 | no route | O2 heater 2 (HT2) | — | |
| W33 | OEM-D-20 | T12-C3-3 | 0.5 | no route | O2 heater 1 (HT1) | — | |
| W34 | OEM-D-17 | T12-C3-22 | 0.5 | no route | Cold start injector 1 (STJ1) | — | |
| W35 | OEM-D-8 | T12-C3-23 | 0.5 | no route | ISC stepper coil 1 (ISC1) | — | |
| W36 | OEM-D-7 | T12-C3-24 | 0.5 | no route | ISC stepper coil 2 (ISC2) | — | |
| W37 | OEM-D-6 | T12-C3-25 | 0.5 | no route | ISC stepper coil 3 (ISC3) | — | |
| W38 | OEM-D-5 | T12-C3-10 | 0.5 | no route | ISC stepper coil 4 (ISC4) | — | |
| W39 | OEM-B-5 | T12-C3-4 | 0.5 | no route | Check-engine lamp (W) | — | |
| W40 | OEM-B-8 | T12-C3-28 | 0.5 | no route | Fuel pump control (FC) | — | |
| W41 | OEM-D-21 | T12-C3-29 | 0.5 | no route | EGR solenoid | — | |
| W42 | OEM-D-22 | T12-C3-30 | 0.5 | no route | Fuel pressure-up VSV (PR) | — | |
| W43 | OEM-D-4 | T12-C1-16 | 0.5 | no route | Cold start injector (STJ) | — | |
| W44 | OEM-A-17 | T12-C2-1 | 0.5 | no route | O2 right front (OXR1) | — | |
| W45 | OEM-A-6 | T12-C2-5 | 0.5 | no route | O2 left front (OXL1) | — | |
| W46 | OEM-B-11 | T12-C2-6 | 0.5 | no route | O2 right rear (OXR2) | — | |
| W47 | OEM-B-24 | T12-C2-18 | 0.5 | no route | O2 left rear (OXL2) | — | |
| W48 | OEM-A-16 | T12-C2-25 | 0.5 | no route | Intake air temperature (THA) | — | |
| W49 | OEM-A-7 | T12-C2-17 | 0.5 | no route | EGR temperature sensor | — | |
| W50 | OEM-C-2 | T12-C2-2 | 0.5 | no route | Igniter 1 feedback (IGF1) | — | |
| W51 | OEM-C-10 | T12-C2-20 | 0.5 | no route | Igniter 2 feedback (IGF2) | — | |
| W52 | OEM-A-19 | T12-C2-31 | 0.5 | no route | Vehicle speed (SPD) | — | |
| W53 | OEM-A-9 | T12-C2-4 | 0.5 | no route | Diagnostic test 1 (TE1) | — | |
| W54 | OEM-A-20 | T12-C2-8 | 0.5 | no route | Diagnostic test 2 (TE2) | — | |
| W55 | OEM-A-14 | T12-C2-11 | 0.5 | no route | Neutral start switch (NSW) | — | |
| W56 | OEM-A-2 | T12-C2-14 | 0.5 | no route | Starter signal (STA) | — | |
| W57 | OEM-B-19 | T12-C2-15 | 0.5 | no route | Stop light switch (BK) | — | |
| W58 | OEM-B-20 | T12-C2-27 | 0.5 | no route | A/T kickdown switch (KD) | — | |
| W59 | OEM-B-23 | T12-C3-19 | 0.5 | no route | A/C request (AC) | — | |
| W60 | OEM-C-1 | T12-C3-20 | 0.5 | no route | TPS idle switch (IDL) | — |
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) | 52.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (4)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | T12-C3-27 | T12-C3-27 "Permanent 12v" is required but not wired. |
| error | REQUIRED_UNMAPPED | OEM-A-1 | Required OEM function "Ignition switch (IGSW)" (digital_in) is not connected to the new ECU. |
| info | NET_FAMILY | OEM-D-4 ↔ T12-C1-16 | OEM-D-4 "Cold start injector (STJ)" [low_side_out] is wired to T12-C1-16 "Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 3 optional OEM pins are not mapped: OEM-A-8 Knock/shield (KS); OEM-C-12 Check connector VF2; OEM-C-4 Check connector VF1 |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-A 1: Ignition switch (IGSW): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); DTAFast T12 has no dedicated key-on input - T12-C3 27: Permanent 12v: required by DTAFast T12 but no stock pin feeds it; wire by hand Not wired: - OEM-A 8: Knock/shield (KS): no free knock input on DTAFast T12 - OEM-C 4: Check connector VF1: no free analog_out on DTAFast T12 - OEM-C 12: Check connector VF2: no free analog_out on DTAFast T12
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | DTAFast T12+ ECU wiring diagram (served for T12 and T12+) | https://cdn.shopify.com/s/files/1/0848/7508/4108/files/T12PLUS_Wiring-Diagram.pdf?v=1728572014 | — | — | — |
| 2 | community_copy | Lextreme: Adaptronic install for 1UZ-FE (Lexus LS400/SC400) — 4-plug A/B/C/D ECU pin table (1992 LS400) | https://www.lextreme.com/installation-of-an-adaptronic-ecu-for-a-lexus-ls400-sc400-1uzfe-engine/ | — | — | — |