Lexus SC400 1992-97 (1UZ-FE non-VVTi) → ECUMASTER EMU Black (auto)
Lexus SC400 1992-97 (1UZ-FE non-VVTi) — ECUMASTER — EMU Black
Drawn by Michael Gnankou · Rev 0 · proposal · 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 | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 52 wires · 9 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| 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 | EMUBLACK-Black-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-22 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-D-13 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-D-26 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | EMUBLACK-Black-27 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-A-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-C-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | EMUBLACK-Black-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-A-11 | EMUBLACK-Black-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-8 | EMUBLACK-Black-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C-7 | EMUBLACK-Black-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-6 | EMUBLACK-Black-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-3 | EMUBLACK-Black-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-11 | EMUBLACK-Black-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-5 | EMUBLACK-Grey-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-13 | EMUBLACK-Grey-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-12 | EMUBLACK-Grey-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-D-11 | EMUBLACK-Grey-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-D-24 | EMUBLACK-Grey-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-D-25 | EMUBLACK-Grey-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-1 | EMUBLACK-Grey-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-4 | EMUBLACK-Black-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-5 | EMUBLACK-Black-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-4 | EMUBLACK-Grey-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-6 | EMUBLACK-Grey-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B-7 | EMUBLACK-Grey-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-D-19 | EMUBLACK-Grey-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-D-20 | EMUBLACK-Grey-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-D-17 | EMUBLACK-Grey-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-D-8 | EMUBLACK-Grey-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-D-7 | EMUBLACK-Grey-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-D-6 | EMUBLACK-Grey-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-17 | EMUBLACK-Black-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-6 | EMUBLACK-Black-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-B-11 | EMUBLACK-Black-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-B-24 | EMUBLACK-Black-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-16 | EMUBLACK-Black-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-7 | EMUBLACK-Black-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-C-2 | EMUBLACK-Black-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-C-10 | EMUBLACK-Black-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-19 | EMUBLACK-Black-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A-9 | EMUBLACK-Black-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-20 | EMUBLACK-Black-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-14 | EMUBLACK-Black-9 | 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 | EMUBLACK-Black-13 | EMUBLACK-Black-27 | open (OL) | +12 V supply must not touch power ground | |
| 2 | EMUBLACK-Black-13 | EMUBLACK-Black-29 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | EMUBLACK-Black-26 | EMUBLACK-Black-27 | open (OL) | 5 V sensor reference must not touch power ground | |
| 4 | EMUBLACK-Black-26 | EMUBLACK-Black-29 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 5 | EMUBLACK-Black-26 | EMUBLACK-Black-13 | 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
EMUBLACK-Black
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil #5 | — | — | — | — | — | — | — | — |
| 10 | Switch #1 In | — | W48 | — | 0.5 | OEM-C-10 | — | — | — |
| 11 | RS232 TXD | — | — | — | — | — | — | — | — |
| 12 | CAN H | — | — | — | — | — | — | — | — |
| 13 | Battery +12V | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Ignition coil #4 | — | — | — | — | — | — | — | — |
| 15 | EGT in #2 | — | — | — | — | — | — | — | — |
| 16 | Knock Sensor in #2 | — | W22 | — | 0.5 | OEM-C-11 | — | — | — |
| 17 | Analog In #3 | — | W43 | — | 0.5 | OEM-B-11 | — | — | — |
| 18 | TPS In | — | W30 | — | 0.5 | OEM-A-4 | — | — | — |
| 19 | WBO Ip | — | — | — | — | — | — | — | — |
| 2 | EGT in #1 | — | — | — | — | — | — | — | — |
| 20 | VSS In | — | W47 | — | 0.5 | OEM-C-2 | — | — | — |
| 21 | Camsync In #1 | — | W19 | — | 0.5 | OEM-C-7 | — | — | — |
| 22 | WBO Rcal | — | — | — | — | — | — | — | — |
| 23 | Switch #2 In | — | W49 | — | 0.5 | OEM-A-19 | — | — | — |
| 24 | RS232 RXD | — | — | — | — | — | — | — | — |
| 25 | CAN L | — | — | — | — | — | — | — | — |
| 26 | +5V supply | — | W17 | — | 0.5 | OEM-A-11 | — | — | — |
| 27 | Power Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 28 | Ecu Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 29 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock Sensor in #1 | — | W21 | — | 0.5 | OEM-C-3 | — | — | — |
| 30 | Analog In #4 | — | W44 | — | 0.5 | OEM-B-24 | — | — | — |
| 31 | Analog In #1 | — | W41 | — | 0.5 | OEM-A-17 | — | — | — |
| 32 | IAT In | — | W45 | — | 0.5 | OEM-A-16 | — | — | — |
| 33 | WBO VGND | — | — | — | — | — | — | — | — |
| 34 | +5V supply | — | — | — | — | — | — | — | — |
| 35 | Analog In #5 | — | W46 | — | 0.5 | OEM-A-7 | — | — | — |
| 36 | Switch #3 In | — | W50 | — | 0.5 | OEM-A-9 | — | — | — |
| 37 | Analog In #6 | — | W51 | — | 0.5 | OEM-A-20 | — | — | — |
| 38 | Sensor Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 39 | Sensor Ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 4 | Analog In #2 | — | W42 | — | 0.5 | OEM-A-6 | — | — | — |
| 5 | CLT In | — | W31 | — | 0.5 | OEM-A-5 | — | — | — |
| 6 | WBO Vs | — | — | — | — | — | — | — | — |
| 7 | Camsync In #2 | — | W20 | — | 0.5 | OEM-C-6 | — | — | — |
| 8 | Primary trigger | — | W18 | — | 0.5 | OEM-C-8 | — | — | — |
| 9 | Flex Fuel In | — | W52 | — | 0.5 | OEM-A-14 | — | — | — |
EMUBLACK-Grey
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil #6 | — | — | — | — | — | — | — | — |
| 10 | H-Bridge #1 Winding B | — | — | — | — | — | — | — | — |
| 11 | H-Bridge #2 Winding B | — | — | — | — | — | — | — | — |
| 12 | AUX 5 | — | W37 | — | 0.5 | OEM-D-17 | — | — | — |
| 13 | AUX 2 / Injector #8 | — | W33 | — | 0.5 | OEM-B-6 | — | — | — |
| 14 | Injector #5 | — | W39 | — | 0.5 | OEM-D-7 | — | — | — |
| 15 | Injector #2 | — | W26 | — | 0.5 | OEM-D-11 | — | — | — |
| 16 | Ignition coil #2 | — | W24 | — | 0.5 | OEM-C-13 | — | — | — |
| 17 | Power Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Ignition +12V | — | W29 | — | 0.5 | OEM-A-1 | — | — | — |
| 19 | WBO Heater | — | W35 | — | 0.5 | OEM-D-19 | — | — | — |
| 2 | H-Bridge #1 Winding A | — | — | — | — | — | — | — | — |
| 20 | AUX 4 / Tacho | — | W36 | — | 0.5 | OEM-D-20 | — | — | — |
| 21 | AUX 1 / Injector #7 | — | W32 | — | 0.5 | OEM-B-4 | — | — | — |
| 22 | Injector #6 | — | W40 | — | 0.5 | OEM-D-6 | — | — | — |
| 23 | Injector #3 | — | W27 | — | 0.5 | OEM-D-24 | — | — | — |
| 24 | Power Ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | H-Bridge #2 Winding A | — | — | — | — | — | — | — | — |
| 4 | AUX 6 | — | W38 | — | 0.5 | OEM-D-8 | — | — | — |
| 5 | AUX 3 | — | W34 | — | 0.5 | OEM-B-7 | — | — | — |
| 6 | Injector #4 | — | W28 | — | 0.5 | OEM-D-25 | — | — | — |
| 7 | Injector #1 | — | W25 | — | 0.5 | OEM-D-12 | — | — | — |
| 8 | Ignition coil #1 | — | W23 | — | 0.5 | OEM-C-5 | — | — | — |
| 9 | Ignition coil #3 | — | — | — | — | — | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition switch (IGSW) | — | W29 | — | 0.5 | EMUBLACK-Grey-18 | — | — | — |
| 11 | Sensor supply +5V (VC) | — | W17 | — | 0.5 | EMUBLACK-Black-26 | — | — | — |
| 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) | — | W52 | — | 0.5 | EMUBLACK-Black-9 | — | — | — |
| 16 | Intake air temperature (THA) | — | W45 | — | 0.5 | EMUBLACK-Black-32 | — | — | — |
| 17 | O2 right front (OXR1) | — | W41 | — | 0.5 | EMUBLACK-Black-31 | — | — | — |
| 18 | Sensor ground (E2) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Vehicle speed (SPD) | — | W49 | — | 0.5 | EMUBLACK-Black-23 | — | — | — |
| 2 | Starter signal (STA) | — | — | — | — | — | — | — | — |
| 20 | Diagnostic test 2 (TE2) | — | W51 | — | 0.5 | EMUBLACK-Black-37 | — | — | — |
| 22 | Power ground (E1) | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Throttle position (VTA1) | — | W30 | — | 0.5 | EMUBLACK-Black-18 | — | — | — |
| 5 | Coolant temperature (THW) | — | W31 | — | 0.5 | EMUBLACK-Black-5 | — | — | — |
| 6 | O2 left front (OXL1) | — | W42 | — | 0.5 | EMUBLACK-Black-4 | — | — | — |
| 7 | EGR temperature sensor | — | W46 | — | 0.5 | EMUBLACK-Black-35 | — | — | — |
| 8 | Knock/shield (KS) | — | — | — | — | — | — | — | — |
| 9 | Diagnostic test 1 (TE1) | — | W50 | — | 0.5 | EMUBLACK-Black-36 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | O2 right rear (OXR2) | — | W43 | — | 0.5 | EMUBLACK-Black-17 | — | — | — |
| 19 | Stop light switch (BK) | — | — | — | — | — | — | — | — |
| 20 | A/T kickdown switch (KD) | — | — | — | — | — | — | — | — |
| 23 | A/C request (AC) | — | — | — | — | — | — | — | — |
| 24 | O2 left rear (OXL2) | — | W44 | — | 0.5 | EMUBLACK-Black-30 | — | — | — |
| 26 | Battery constant (BATT) | — | — | — | — | — | — | — | — |
| 4 | EFI main relay control (MREL) | — | W32 | — | 0.5 | EMUBLACK-Grey-21 | — | — | — |
| 5 | Check-engine lamp (W) | — | — | — | — | — | — | — | — |
| 6 | Fuel pump relay (FPR) | — | W33 | — | 0.5 | EMUBLACK-Grey-13 | — | — | — |
| 7 | A/C clutch relay (ACMG) | — | W34 | — | 0.5 | EMUBLACK-Grey-5 | — | — | — |
| 8 | Fuel pump control (FC) | — | — | — | — | — | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | TPS idle switch (IDL) | — | — | — | — | — | — | — | — |
| 10 | Igniter 2 feedback (IGF2) | — | W48 | — | 0.5 | EMUBLACK-Black-10 | — | — | — |
| 11 | Knock sensor 2 (KNK2) | — | W22 | — | 0.5 | EMUBLACK-Black-16 | — | — | — |
| 12 | Check connector VF2 | — | — | — | — | — | — | — | — |
| 13 | Ignition 2 (IGT2) | — | W24 | — | 0.5 | EMUBLACK-Grey-16 | — | — | — |
| 15 | Cam sensor ground (G-) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Crank sensor - (NE-) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Igniter 1 feedback (IGF1) | — | W47 | — | 0.5 | EMUBLACK-Black-20 | — | — | — |
| 3 | Knock sensor 1 (KNK1) | — | W21 | — | 0.5 | EMUBLACK-Black-3 | — | — | — |
| 4 | Check connector VF1 | — | — | — | — | — | — | — | — |
| 5 | Ignition 1 (IGT1) | — | W23 | — | 0.5 | EMUBLACK-Grey-8 | — | — | — |
| 6 | Cam sensor 2 + (G2+) | — | W20 | — | 0.5 | EMUBLACK-Black-7 | — | — | — |
| 7 | Cam sensor 1 + (G1+) | — | W19 | — | 0.5 | EMUBLACK-Black-21 | — | — | — |
| 8 | Crank sensor + (NE+) | — | W18 | — | 0.5 | EMUBLACK-Black-8 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Injector 2&8 (#20) | — | W26 | — | 0.5 | EMUBLACK-Grey-15 | — | — | — |
| 12 | Injector 1&7 (#10) | — | W25 | — | 0.5 | EMUBLACK-Grey-7 | — | — | — |
| 13 | Power ground (E01) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 17 | Cold start injector 1 (STJ1) | — | W37 | — | 0.5 | EMUBLACK-Grey-12 | — | — | — |
| 19 | O2 heater 2 (HT2) | — | W35 | — | 0.5 | EMUBLACK-Grey-19 | — | — | — |
| 20 | O2 heater 1 (HT1) | — | W36 | — | 0.5 | EMUBLACK-Grey-20 | — | — | — |
| 21 | EGR solenoid | — | — | — | — | — | — | — | — |
| 22 | Fuel pressure-up VSV (PR) | — | — | — | — | — | — | — | — |
| 24 | Injector 3&5 (#40) | — | W27 | — | 0.5 | EMUBLACK-Grey-23 | — | — | — |
| 25 | Injector 4&6 (#30) | — | W28 | — | 0.5 | EMUBLACK-Grey-6 | — | — | — |
| 26 | Power ground (E02) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Cold start injector (STJ) | — | — | — | — | — | — | — | — |
| 5 | ISC stepper coil 4 (ISC4) | — | — | — | — | — | — | — | — |
| 6 | ISC stepper coil 3 (ISC3) | — | W40 | — | 0.5 | EMUBLACK-Grey-22 | — | — | — |
| 7 | ISC stepper coil 2 (ISC2) | — | W39 | — | 0.5 | EMUBLACK-Grey-14 | — | — | — |
| 8 | ISC stepper coil 1 (ISC1) | — | W38 | — | 0.5 | EMUBLACK-Grey-4 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-A-18 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-C-15 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-C-16 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | EMUBLACK-Black-29 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | EMUBLACK-Black-38 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | EMUBLACK-Black-39 | — | — | — |
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 | EMUBLACK-Black-13 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-A-22 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-D-13 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-D-26 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | EMUBLACK-Black-27 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | EMUBLACK-Black-28 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | EMUBLACK-Grey-17 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | EMUBLACK-Grey-24 | — | — | — |
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 | EMUBLACK-Grey-18 | Ignition +12V | digital_in | single_source | |
| OEM-A-11 | Sensor supply +5V (VC) | vref | EMUBLACK-Black-26 | +5V supply | vref | single_source | |
| OEM-A-12 | EFI main relay (B+) | power_in | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-A-13 | EFI main relay (B1+) | power_in | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-A-14 | Neutral start switch (NSW) | digital_in | EMUBLACK-Black-9 | Flex Fuel In | analog_in | single_source | |
| OEM-A-16 | Intake air temperature (THA) | temp_in | EMUBLACK-Black-32 | IAT In | temp_in | single_source | |
| OEM-A-17 | O2 right front (OXR1) | lambda_nb_in | EMUBLACK-Black-31 | Analog In #1 | analog_in | single_source | |
| OEM-A-18 | Sensor ground (E2) | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-19 | Vehicle speed (SPD) | digital_in | EMUBLACK-Black-23 | Switch #2 In | digital_in | single_source | |
| OEM-A-2 | Starter signal (STA) | digital_in | — | — | — | single_source | |
| OEM-A-20 | Diagnostic test 2 (TE2) | digital_in | EMUBLACK-Black-37 | Analog In #6 | analog_in | single_source | |
| OEM-A-22 | Power ground (E1) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-A-4 | Throttle position (VTA1) | analog_in | EMUBLACK-Black-18 | TPS In | analog_in | single_source | |
| OEM-A-5 | Coolant temperature (THW) | temp_in | EMUBLACK-Black-5 | CLT In | temp_in | single_source | |
| OEM-A-6 | O2 left front (OXL1) | lambda_nb_in | EMUBLACK-Black-4 | Analog In #2 | analog_in | single_source | |
| OEM-A-7 | EGR temperature sensor | temp_in | EMUBLACK-Black-35 | Analog In #5 | analog_in | single_source | |
| OEM-A-8 | Knock/shield (KS) | knock_in | — | — | — | single_source | |
| OEM-A-9 | Diagnostic test 1 (TE1) | digital_in | EMUBLACK-Black-36 | Switch #3 In | digital_in | single_source | |
| OEM-B-11 | O2 right rear (OXR2) | lambda_nb_in | EMUBLACK-Black-17 | Analog In #3 | analog_in | single_source | |
| OEM-B-19 | Stop light switch (BK) | digital_in | — | — | — | single_source | |
| OEM-B-20 | A/T kickdown switch (KD) | digital_in | — | — | — | single_source | |
| OEM-B-23 | A/C request (AC) | digital_in | — | — | — | single_source | |
| OEM-B-24 | O2 left rear (OXL2) | lambda_nb_in | EMUBLACK-Black-30 | Analog In #4 | analog_in | single_source | |
| OEM-B-26 | Battery constant (BATT) | power_in | — | — | — | single_source | |
| OEM-B-4 | EFI main relay control (MREL) | low_side_out | EMUBLACK-Grey-21 | AUX 1 / Injector #7 | low_side_out | single_source | |
| OEM-B-5 | Check-engine lamp (W) | low_side_out | — | — | — | single_source | |
| OEM-B-6 | Fuel pump relay (FPR) | low_side_out | EMUBLACK-Grey-13 | AUX 2 / Injector #8 | low_side_out | single_source | |
| OEM-B-7 | A/C clutch relay (ACMG) | low_side_out | EMUBLACK-Grey-5 | AUX 3 | low_side_out | single_source | |
| OEM-B-8 | Fuel pump control (FC) | low_side_out | — | — | — | single_source | |
| OEM-C-1 | TPS idle switch (IDL) | digital_in | — | — | — | single_source | |
| OEM-C-10 | Igniter 2 feedback (IGF2) | digital_in | EMUBLACK-Black-10 | Switch #1 In | digital_in | single_source | |
| OEM-C-11 | Knock sensor 2 (KNK2) | knock_in | EMUBLACK-Black-16 | Knock Sensor in #2 | knock_in | single_source | |
| OEM-C-12 | Check connector VF2 | analog_out | — | — | — | single_source | |
| OEM-C-13 | Ignition 2 (IGT2) | ignition_out | EMUBLACK-Grey-16 | Ignition coil #2 | ignition_out | single_source | |
| OEM-C-15 | Cam sensor ground (G-) | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-16 | Crank sensor - (NE-) | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-C-2 | Igniter 1 feedback (IGF1) | digital_in | EMUBLACK-Black-20 | VSS In | digital_in | single_source | |
| OEM-C-3 | Knock sensor 1 (KNK1) | knock_in | EMUBLACK-Black-3 | Knock Sensor in #1 | knock_in | single_source | |
| OEM-C-4 | Check connector VF1 | analog_out | — | — | — | single_source | |
| OEM-C-5 | Ignition 1 (IGT1) | ignition_out | EMUBLACK-Grey-8 | Ignition coil #1 | ignition_out | single_source | |
| OEM-C-6 | Cam sensor 2 + (G2+) | trigger_in | EMUBLACK-Black-7 | Camsync In #2 | trigger_in | single_source | |
| OEM-C-7 | Cam sensor 1 + (G1+) | trigger_in | EMUBLACK-Black-21 | Camsync In #1 | trigger_in | single_source | |
| OEM-C-8 | Crank sensor + (NE+) | trigger_in | EMUBLACK-Black-8 | Primary trigger | trigger_in | single_source | |
| OEM-D-11 | Injector 2&8 (#20) | injector_out | EMUBLACK-Grey-15 | Injector #2 | injector_out | single_source | |
| OEM-D-12 | Injector 1&7 (#10) | injector_out | EMUBLACK-Grey-7 | Injector #1 | injector_out | single_source | |
| OEM-D-13 | Power ground (E01) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-D-17 | Cold start injector 1 (STJ1) | low_side_out | EMUBLACK-Grey-12 | AUX 5 | low_side_out | single_source | |
| OEM-D-19 | O2 heater 2 (HT2) | low_side_out | EMUBLACK-Grey-19 | WBO Heater | low_side_out | single_source | |
| OEM-D-20 | O2 heater 1 (HT1) | low_side_out | EMUBLACK-Grey-20 | AUX 4 / Tacho | low_side_out | single_source | |
| OEM-D-21 | EGR solenoid | low_side_out | — | — | — | single_source | |
| OEM-D-22 | Fuel pressure-up VSV (PR) | low_side_out | — | — | — | single_source | |
| OEM-D-24 | Injector 3&5 (#40) | injector_out | EMUBLACK-Grey-23 | Injector #3 | injector_out | single_source | |
| OEM-D-25 | Injector 4&6 (#30) | injector_out | EMUBLACK-Grey-6 | Injector #4 | injector_out | single_source | |
| OEM-D-26 | Power ground (E02) | ground | EMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24 | Power Ground + Ecu Ground + Power Ground + Power Ground | ground | single_source | |
| OEM-D-4 | Cold start injector (STJ) | low_side_out | — | — | — | single_source | |
| OEM-D-5 | ISC stepper coil 4 (ISC4) | low_side_out | — | — | — | single_source | |
| OEM-D-6 | ISC stepper coil 3 (ISC3) | low_side_out | EMUBLACK-Grey-22 | Injector #6 | injector_out | single_source | |
| OEM-D-7 | ISC stepper coil 2 (ISC2) | low_side_out | EMUBLACK-Grey-14 | Injector #5 | injector_out | single_source | |
| OEM-D-8 | ISC stepper coil 1 (ISC1) | low_side_out | EMUBLACK-Grey-4 | AUX 6 | 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 | EMUBLACK-Black-13 | 0.85 | no route | Battery +12V | — | |
| W4 | OEM-A-22 | SP-GND-1 | 0.85 | no route | Power ground (E1) | — | |
| W5 | OEM-D-13 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W6 | OEM-D-26 | SP-GND-1 | 0.85 | no route | Power ground (E02) | — | |
| W7 | SP-GND-1 | EMUBLACK-Black-27 | 0.85 | no route | Power Ground | — | |
| W8 | SP-GND-1 | EMUBLACK-Black-28 | 0.85 | no route | Ecu Ground | — | |
| W9 | SP-GND-1 | EMUBLACK-Grey-17 | 0.85 | no route | Power Ground | — | |
| W10 | SP-GND-1 | EMUBLACK-Grey-24 | 0.85 | no route | Power Ground | — | |
| W11 | OEM-A-18 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W12 | OEM-C-15 | SP-0V-1 | 0.5 | no route | Cam sensor ground (G-) | — | |
| W13 | OEM-C-16 | SP-0V-1 | 0.5 | no route | Crank sensor - (NE-) | — | |
| W14 | SP-0V-1 | EMUBLACK-Black-29 | 0.5 | no route | Sensor Ground | — | |
| W15 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | no route | Sensor Ground | — | |
| W16 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | no route | Sensor Ground | — | |
| W17 | OEM-A-11 | EMUBLACK-Black-26 | 0.5 | no route | Sensor supply +5V (VC) | — | |
| W18 | OEM-C-8 | EMUBLACK-Black-8 | 0.5 | no route | Crank sensor + (NE+) | — | |
| W19 | OEM-C-7 | EMUBLACK-Black-21 | 0.5 | no route | Cam sensor 1 + (G1+) | — | |
| W20 | OEM-C-6 | EMUBLACK-Black-7 | 0.5 | no route | Cam sensor 2 + (G2+) | — | |
| W21 | OEM-C-3 | EMUBLACK-Black-3 | 0.5 | no route | Knock sensor 1 (KNK1) | — | |
| W22 | OEM-C-11 | EMUBLACK-Black-16 | 0.5 | no route | Knock sensor 2 (KNK2) | — | |
| W23 | OEM-C-5 | EMUBLACK-Grey-8 | 0.5 | no route | Ignition 1 (IGT1) | — | |
| W24 | OEM-C-13 | EMUBLACK-Grey-16 | 0.5 | no route | Ignition 2 (IGT2) | — | |
| W25 | OEM-D-12 | EMUBLACK-Grey-7 | 0.5 | no route | Injector 1&7 (#10) | — | |
| W26 | OEM-D-11 | EMUBLACK-Grey-15 | 0.5 | no route | Injector 2&8 (#20) | — | |
| W27 | OEM-D-24 | EMUBLACK-Grey-23 | 0.5 | no route | Injector 3&5 (#40) | — | |
| W28 | OEM-D-25 | EMUBLACK-Grey-6 | 0.5 | no route | Injector 4&6 (#30) | — | |
| W29 | OEM-A-1 | EMUBLACK-Grey-18 | 0.5 | no route | Ignition switch (IGSW) | — | |
| W30 | OEM-A-4 | EMUBLACK-Black-18 | 0.5 | no route | Throttle position (VTA1) | — | |
| W31 | OEM-A-5 | EMUBLACK-Black-5 | 0.5 | no route | Coolant temperature (THW) | — | |
| W32 | OEM-B-4 | EMUBLACK-Grey-21 | 0.5 | no route | EFI main relay control (MREL) | — | |
| W33 | OEM-B-6 | EMUBLACK-Grey-13 | 0.5 | no route | Fuel pump relay (FPR) | — | |
| W34 | OEM-B-7 | EMUBLACK-Grey-5 | 0.5 | no route | A/C clutch relay (ACMG) | — | |
| W35 | OEM-D-19 | EMUBLACK-Grey-19 | 0.5 | no route | O2 heater 2 (HT2) | — | |
| W36 | OEM-D-20 | EMUBLACK-Grey-20 | 0.5 | no route | O2 heater 1 (HT1) | — | |
| W37 | OEM-D-17 | EMUBLACK-Grey-12 | 0.5 | no route | Cold start injector 1 (STJ1) | — | |
| W38 | OEM-D-8 | EMUBLACK-Grey-4 | 0.5 | no route | ISC stepper coil 1 (ISC1) | — | |
| W39 | OEM-D-7 | EMUBLACK-Grey-14 | 0.5 | no route | ISC stepper coil 2 (ISC2) | — | |
| W40 | OEM-D-6 | EMUBLACK-Grey-22 | 0.5 | no route | ISC stepper coil 3 (ISC3) | — | |
| W41 | OEM-A-17 | EMUBLACK-Black-31 | 0.5 | no route | O2 right front (OXR1) | — | |
| W42 | OEM-A-6 | EMUBLACK-Black-4 | 0.5 | no route | O2 left front (OXL1) | — | |
| W43 | OEM-B-11 | EMUBLACK-Black-17 | 0.5 | no route | O2 right rear (OXR2) | — | |
| W44 | OEM-B-24 | EMUBLACK-Black-30 | 0.5 | no route | O2 left rear (OXL2) | — | |
| W45 | OEM-A-16 | EMUBLACK-Black-32 | 0.5 | no route | Intake air temperature (THA) | — | |
| W46 | OEM-A-7 | EMUBLACK-Black-35 | 0.5 | no route | EGR temperature sensor | — | |
| W47 | OEM-C-2 | EMUBLACK-Black-20 | 0.5 | no route | Igniter 1 feedback (IGF1) | — | |
| W48 | OEM-C-10 | EMUBLACK-Black-10 | 0.5 | no route | Igniter 2 feedback (IGF2) | — | |
| W49 | OEM-A-19 | EMUBLACK-Black-23 | 0.5 | no route | Vehicle speed (SPD) | — | |
| W50 | OEM-A-9 | EMUBLACK-Black-36 | 0.5 | no route | Diagnostic test 1 (TE1) | — | |
| W51 | OEM-A-20 | EMUBLACK-Black-37 | 0.5 | no route | Diagnostic test 2 (TE2) | — | |
| W52 | OEM-A-14 | EMUBLACK-Black-9 | 0.5 | no route | Neutral start switch (NSW) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-A-14 ↔ EMUBLACK-Black-9 | OEM-A-14 "Neutral start switch (NSW)" [digital_in] is wired to EMUBLACK-Black-9 "Flex Fuel In" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-A-20 ↔ EMUBLACK-Black-37 | OEM-A-20 "Diagnostic test 2 (TE2)" [digital_in] is wired to EMUBLACK-Black-37 "Analog In #6" [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 | NET_FAMILY | OEM-A-7 ↔ EMUBLACK-Black-35 | OEM-A-7 "EGR temperature sensor" [temp_in] is wired to EMUBLACK-Black-35 "Analog In #5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-D-6 ↔ EMUBLACK-Grey-22 | OEM-D-6 "ISC stepper coil 3 (ISC3)" [low_side_out] is wired to EMUBLACK-Grey-22 "Injector #6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-7 ↔ EMUBLACK-Grey-14 | OEM-D-7 "ISC stepper coil 2 (ISC2)" [low_side_out] is wired to EMUBLACK-Grey-14 "Injector #5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 14 optional OEM pins are not mapped: OEM-A-2 Starter signal (STA); OEM-A-8 Knock/shield (KS); OEM-B-19 Stop light switch (BK); OEM-B-20 A/T kickdown switch (KD); OEM-B-23 A/C request (AC); OEM-B-5 Check-engine lamp (W); OEM-B-8 Fuel pump control (FC); OEM-C-1 TPS idle switch (IDL); OEM-C-12 Check connector VF2; OEM-C-4 Check connector VF1; OEM-D-21 EGR solenoid; OEM-D-22 Fuel pressure-up VSV (PR); OEM-D-4 Cold start injector (STJ); OEM-D-5 ISC stepper coil 4 (ISC4) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-B-26 | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Not wired: - OEM-B 26: Battery constant (BATT): ECUMASTER EMU Black has no battery-constant input; not needed - OEM-A 8: Knock/shield (KS): no free knock input on ECUMASTER EMU Black - OEM-D 5: ISC stepper coil 4 (ISC4): no free low_side/relay_control/heater_low_side/ls_hs/injector on ECUMASTER EMU Black - OEM-B 5: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on ECUMASTER EMU Black - OEM-B 8: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on ECUMASTER EMU Black - OEM-D 21: EGR solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on ECUMASTER EMU Black - OEM-D 22: Fuel pressure-up VSV (PR): no free low_side/relay_control/heater_low_side/ls_hs/injector on ECUMASTER EMU Black - OEM-D 4: Cold start injector (STJ): no free low_side/relay_control/heater_low_side/ls_hs/injector on ECUMASTER EMU Black - OEM-A 2: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-B 19: Stop light switch (BK): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-B 20: A/T kickdown switch (KD): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-B 23: A/C request (AC): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-C 1: TPS idle switch (IDL): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-C 4: Check connector VF1: no free analog_out on ECUMASTER EMU Black - OEM-C 12: Check connector VF2: no free analog_out on ECUMASTER EMU Black
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | ECUMASTER EMU Black — pinout (Black 39-pin / Grey 24-pin) | https://www.ecumaster.com/wp/wp-content/uploads/2020/05/EMU_Black_pinout.pdf | archive | 2026-10-05 | 096b2b4df1bd |
| 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/ | — | — | — |