Lexus LS400 1998-2000 (1UZ-FE VVT-i) → Emtron SL4 (auto)
Lexus LS400 1998-2000 (1UZ-FE VVT-i) — Emtron — SL4
⚠ 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 | 8: read the Findings page before cutting any wire |
| Size of the job | 56 wires · 10 connectors · 3 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-E15-16 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-E15-7 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-E15-8 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | SL4-A-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-14V-1 | SL4-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-E13-17 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-E14-21 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | SL4-B-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | SL4-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-E13-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-E13-19 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | SL4-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-E13-2 | SL4-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-E14-22 | SL4-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-E14-23 | SL4-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-E14-10 | SL4-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | SL4-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-E14-18 | SL4-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-E14-17 | SL4-B-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-E14-11 | SL4-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-E14-12 | SL4-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-E14-13 | SL4-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-E14-14 | SL4-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-E13-5 | SL4-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-E13-6 | SL4-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-E14-1 | SL4-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-E14-2 | SL4-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-E14-3 | SL4-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-E14-4 | SL4-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-E14-5 | SL4-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-E14-6 | SL4-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-E14-7 | SL4-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-E14-8 | SL4-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-E15-9 | SL4-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-E11-19 | SL4-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-E14-20 | SL4-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-E13-10 | SL4-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-E13-13 | SL4-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-E13-21 | SL4-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-E13-20 | SL4-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-E13-9 | SL4-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-E13-14 | SL4-B-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-E15-10 | SL4-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-E15-5 | SL4-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-E11-7 | SL4-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-E11-8 | SL4-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-E13-3 | SL4-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-E13-4 | SL4-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-E11-28 | SL4-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-E11-18 | SL4-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-E11-27 | SL4-B-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-E13-11 | SL4-B-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-E13-12 | SL4-B-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-E14-27 | SL4-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-E14-28 | SL4-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-E11-17 | SL4-A-22 | 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 | SL4-B-10 | SL4-A-34 | open (OL) | sensor ground must not touch +12 V supply | |
| 2 | SL4-B-10 | SL4-B-2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | SL4-B-18 | SL4-A-34 | open (OL) | power ground must not touch +12 V supply | |
| 4 | SL4-B-18 | SL4-B-2 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | SL4-B-2 | SL4-A-34 | 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-E11
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 17 | Starter signal (STA) | — | W56 | — | 0.5 | SL4-A-22 | — | — | — |
| 18 | O2 sensor signal (bank unconfirmed) | — | W50 | — | 0.5 | SL4-B-20 | — | — | — |
| 19 | VVT oil-control valve RH (OCR+) | — | W35 | — | 0.5 | SL4-B-3 | — | — | — |
| 27 | O2 sensor signal (bank unconfirmed) | — | W51 | — | 0.5 | SL4-B-21 | — | — | — |
| 28 | VVT oil-control valve RH (OCR−) | — | W49 | — | 0.5 | SL4-A-13 | — | — | — |
| 5 | Diagnostic test (TC) | — | — | — | — | — | — | — | — |
| 7 | O2 sensor heater (bank unconfirmed) | — | W45 | — | 0.5 | SL4-A-17 | — | — | — |
| 8 | O2 sensor heater (bank unconfirmed) | — | W46 | — | 0.5 | SL4-A-10 | — | — | — |
OEM-E12
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 12 | Throttle magnetic clutch + (CL+) | — | — | — | — | — | — | — | — |
OEM-E13
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | MAF signal (VG) | — | W37 | — | 0.5 | SL4-B-11 | — | — | — |
| 11 | O2 sensor signal (bank unconfirmed) | — | W52 | — | 0.5 | SL4-B-22 | — | — | — |
| 12 | O2 sensor signal (bank unconfirmed) | — | W53 | — | 0.5 | SL4-B-23 | — | — | — |
| 13 | Throttle position sensor 1 (VTA) | — | W38 | — | 0.5 | SL4-B-12 | — | — | — |
| 14 | Engine coolant temp (THW) | — | W42 | — | 0.5 | SL4-B-19 | — | — | — |
| 15 | VVT position sensor RH (VVR+) | — | — | — | — | — | — | — | — |
| 16 | VVT position sensor LH (VVL+) | — | — | — | — | — | — | — | — |
| 17 | ECU ground (E1) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Sensor ground (E2) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | MAF ground (EVG) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | +5V sensor reference (VC) | — | W13 | — | 0.5 | SL4-B-2 | — | — | — |
| 20 | Throttle position sensor 2 (VTA2) | — | W40 | — | 0.5 | SL4-B-14 | — | — | — |
| 21 | Accelerator pedal position 1 (VPA) | — | W39 | — | 0.5 | SL4-B-13 | — | — | — |
| 22 | Intake air temp (THA) | — | — | — | — | — | — | — | — |
| 23 | VVT position sensor RH (VVR−) | — | — | — | — | — | — | — | — |
| 24 | VVT position sensor LH (VVL−) | — | — | — | — | — | — | — | — |
| 3 | O2 sensor heater (bank unconfirmed) | — | W47 | — | 0.5 | SL4-A-11 | — | — | — |
| 4 | O2 sensor heater (bank unconfirmed) | — | W48 | — | 0.5 | SL4-A-12 | — | — | — |
| 5 | Injector 1 (cyl 1) | — | W24 | — | 0.5 | SL4-A-1 | — | — | — |
| 6 | Injector 2 (cyl 2) | — | W25 | — | 0.5 | SL4-A-2 | — | — | — |
| 8 | Throttle magnetic clutch − (CL−) | — | — | — | — | — | — | — | — |
| 9 | Accelerator pedal position 2 (VPA2) | — | W41 | — | 0.5 | SL4-B-15 | — | — | — |
OEM-E14
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 3 (cyl 3) | — | W26 | — | 0.5 | SL4-A-3 | — | — | — |
| 10 | Camshaft position sensor (G2) | — | W16 | — | 0.5 | SL4-B-7 | — | — | — |
| 11 | Ignition coil 1 (IGT1) | — | W20 | — | 0.5 | SL4-A-26 | — | — | — |
| 12 | Ignition coil 2 (IGT2) | — | W21 | — | 0.5 | SL4-A-27 | — | — | — |
| 13 | Ignition coil 3 (IGT3) | — | W22 | — | 0.5 | SL4-A-28 | — | — | — |
| 14 | Ignition coil 4 (IGT4) | — | W23 | — | 0.5 | SL4-A-29 | — | — | — |
| 15 | Ignition coil 5 (IGT5) | — | — | — | — | — | — | — | — |
| 16 | Ignition coil 6 (IGT6) | — | — | — | — | — | — | — | — |
| 17 | Knock sensor RH (KNKR) | — | W19 | — | 0.5 | SL4-B-24 | — | — | — |
| 18 | Knock sensor LH (KNKL) | — | W18 | — | 0.5 | SL4-B-16 | — | — | — |
| 19 | VVT oil-control valve LH (OCV−) | — | — | — | — | — | — | — | — |
| 2 | Injector 4 (cyl 4) | — | W27 | — | 0.5 | SL4-A-4 | — | — | — |
| 20 | VVT oil-control valve LH (OCV+) | — | W36 | — | 0.5 | SL4-A-14 | — | — | — |
| 21 | Power/injector ground (E01) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Crank position sensor (NE−) | — | W14 | — | 0.5 | SL4-B-6 | — | — | — |
| 23 | Crank position sensor (NE+) | — | W15 | — | 0.5 | SL4-B-5 | — | — | — |
| 25 | Ignition coil 7 (IGT7) | — | — | — | — | — | — | — | — |
| 26 | Ignition coil 8 (IGT8) | — | — | — | — | — | — | — | — |
| 27 | Ignition confirmation 1 (IGF1) | — | W54 | — | 0.5 | SL4-A-20 | — | — | — |
| 28 | Ignition confirmation 2 (IGF2) | — | W55 | — | 0.5 | SL4-A-21 | — | — | — |
| 29 | ACIS induction VSV | — | — | — | — | — | — | — | — |
| 3 | Injector 5 (cyl 5) | — | W28 | — | 0.5 | SL4-A-1 | — | — | — |
| 4 | Injector 6 (cyl 6) | — | W29 | — | 0.5 | SL4-A-2 | — | — | — |
| 5 | Injector 7 (cyl 7) | — | W30 | — | 0.5 | SL4-A-3 | — | — | — |
| 6 | Injector 8 (cyl 8) | — | W31 | — | 0.5 | SL4-A-4 | — | — | — |
| 7 | Throttle motor − (M−) | — | W32 | — | 0.5 | SL4-A-19 | — | — | — |
| 8 | Throttle motor + (M+) | — | W33 | — | 0.5 | SL4-A-18 | — | — | — |
OEM-E15
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (+12V) | — | — | — | — | — | — | — | — |
| 10 | EFI main relay control (MREL) | — | W43 | — | 0.5 | SL4-A-15 | — | — | — |
| 11 | OBD-II / DLC3 data (SIL) | — | — | — | — | — | — | — | — |
| 16 | ECM power (EFI relay +B) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 5 | Fuel pump relay control (FC) | — | W44 | — | 0.5 | SL4-A-16 | — | — | — |
| 6 | Check engine light (W) | — | — | — | — | — | — | — | — |
| 7 | ECM power feed (+BM) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 8 | ECM power (EFI relay +B1) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 9 | Ignition switch (+12V) | — | W34 | — | 0.5 | SL4-B-4 | — | — | — |
SL4-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injection channel 1 | — | W24 | — | 0.5 | OEM-E13-5 | — | — | — |
| 1 | Injection channel 1 | — | W28 | — | 0.5 | OEM-E14-3 | — | — | — |
| 2 | Injection channel 2 | — | W25 | — | 0.5 | OEM-E13-6 | — | — | — |
| 2 | Injection channel 2 | — | W29 | — | 0.5 | OEM-E14-4 | — | — | — |
| 3 | Injection channel 3 | — | W30 | — | 0.5 | OEM-E14-5 | — | — | — |
| 3 | Injection channel 3 | — | W26 | — | 0.5 | OEM-E14-1 | — | — | — |
| 4 | Injection channel 4 | — | W27 | — | 0.5 | OEM-E14-2 | — | — | — |
| 4 | Injection channel 4 | — | W31 | — | 0.5 | OEM-E14-6 | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Sensor supply 8V | — | — | — | — | — | — | — | — |
| 10 | Auxiliary output 1 | — | W46 | — | 0.5 | OEM-E11-8 | — | — | — |
| 11 | Auxiliary output 2 | — | W47 | — | 0.5 | OEM-E13-3 | — | — | — |
| 12 | Auxiliary output 3 | — | W48 | — | 0.5 | OEM-E13-4 | — | — | — |
| 13 | Auxiliary output 4 | — | W49 | — | 0.5 | OEM-E11-28 | — | — | — |
| 14 | Auxiliary output 5 | — | W36 | — | 0.5 | OEM-E14-20 | — | — | — |
| 15 | Auxiliary output 6 | — | W43 | — | 0.5 | OEM-E15-10 | — | — | — |
| 16 | Auxiliary output 7 | — | W44 | — | 0.5 | OEM-E15-5 | — | — | — |
| 17 | Auxiliary output 8 | — | W45 | — | 0.5 | OEM-E11-7 | — | — | — |
| 18 | Auxiliary output 9 | — | W33 | — | 0.5 | OEM-E14-8 | — | — | — |
| 19 | Auxiliary output 10 | — | W32 | — | 0.5 | OEM-E14-7 | — | — | — |
| 20 | Digital input 1 | — | W54 | — | 0.5 | OEM-E14-27 | — | — | — |
| 21 | Digital input 2 | — | W55 | — | 0.5 | OEM-E14-28 | — | — | — |
| 22 | Digital input 3 | — | W56 | — | 0.5 | OEM-E11-17 | — | — | — |
| 23 | Digital input 4 | — | — | — | — | — | — | — | — |
| 24 | Digital input 5 | — | — | — | — | — | — | — | — |
| 25 | Digital input 6 | — | — | — | — | — | — | — | — |
| 26 | Ignition channel 1 | — | W20 | — | 0.5 | OEM-E14-11 | — | — | — |
| 27 | Ignition channel 2 | — | W21 | — | 0.5 | OEM-E14-12 | — | — | — |
| 28 | Ignition channel 3 | — | W22 | — | 0.5 | OEM-E14-13 | — | — | — |
| 29 | Ignition channel 4 | — | W23 | — | 0.5 | OEM-E14-14 | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | NC | — | — | — | — | — | — | — | — |
| 33 | NC | — | — | — | — | — | — | — | — |
| 34 | Aux 9–10 14V supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
SL4-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU 14V supply | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Sensor supply Vref1 5.0V | — | W13 | — | 0.5 | OEM-E13-2 | — | — | — |
| 3 | EFI relay output (low side, 200 mA) | — | W35 | — | 0.5 | OEM-E11-19 | — | — | — |
| 4 | Ignition switch input | — | W34 | — | 0.5 | OEM-E15-9 | — | — | — |
| 5 | Crank index sensor + | — | W15 | — | 0.5 | OEM-E14-23 | — | — | — |
| 6 | Crank index sensor − | — | W14 | — | 0.5 | OEM-E14-22 | — | — | — |
| 7 | Sync sensor + | — | W16 | — | 0.5 | OEM-E14-10 | — | — | — |
| 8 | Sync sensor − | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 9 | Shield (crank/sync/knock) | — | — | — | — | — | — | — | — |
| 10 | Analog sensor 0V reference | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | Analog input 1 | — | W37 | — | 0.5 | OEM-E13-10 | — | — | — |
| 12 | Analog input 2 | — | W38 | — | 0.5 | OEM-E13-13 | — | — | — |
| 13 | Analog input 3 | — | W39 | — | 0.5 | OEM-E13-21 | — | — | — |
| 14 | Analog input 4 | — | W40 | — | 0.5 | OEM-E13-20 | — | — | — |
| 15 | Analog input 5 | — | W41 | — | 0.5 | OEM-E13-9 | — | — | — |
| 16 | Knock 1 + | — | W18 | — | 0.5 | OEM-E14-18 | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | ECU ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 19 | Analog input 6 | — | W42 | — | 0.5 | OEM-E13-14 | — | — | — |
| 20 | Analog input 7 (switchable 1k pull-up) | — | W50 | — | 0.5 | OEM-E11-18 | — | — | — |
| 21 | Analog input 8 (switchable 1k pull-up) | — | W51 | — | 0.5 | OEM-E11-27 | — | — | — |
| 22 | Analog input 9 (switchable 1k pull-up) | — | W52 | — | 0.5 | OEM-E13-11 | — | — | — |
| 23 | Analog input 10 (switchable 1k pull-up) | — | W53 | — | 0.5 | OEM-E13-12 | — | — | — |
| 24 | Knock 2 + | — | W19 | — | 0.5 | OEM-E14-17 | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | ECU ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 27 | CAN 1 H | — | — | — | — | — | — | — | — |
| 28 | CAN 1 L | — | — | — | — | — | — | — | — |
| 29 | NC | — | — | — | — | — | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | Ethernet Tx + | — | — | — | — | — | — | — | — |
| 32 | Ethernet Tx − | — | — | — | — | — | — | — | — |
| 33 | Ethernet Rx + | — | — | — | — | — | — | — | — |
| 34 | Ethernet Rx − | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-E13-19 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-E13-18 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | SL4-B-10 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | SL4-B-8 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-E15-16 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-E15-7 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-E15-8 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | SL4-A-34 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | SL4-B-1 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-E13-17 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-E14-21 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | SL4-B-18 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | SL4-B-26 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-E11-17 | Starter signal (STA) | digital_in | SL4-A-22 | Digital input 3 | digital_in | corroborated | |
| OEM-E11-18 | O2 sensor signal (bank unconfirmed) | lambda_nb_in | SL4-B-20 | Analog input 7 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-E11-19 | VVT oil-control valve RH (OCR+) | low_side_out | SL4-B-3 | EFI relay output (low side, 200 mA) | low_side_out | corroborated | |
| OEM-E11-27 | O2 sensor signal (bank unconfirmed) | lambda_nb_in | SL4-B-21 | Analog input 8 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-E11-28 | VVT oil-control valve RH (OCR−) | low_side_out | SL4-A-13 | Auxiliary output 4 | switch_out | corroborated | |
| OEM-E11-5 | Diagnostic test (TC) | serial | — | — | — | corroborated | |
| OEM-E11-7 | O2 sensor heater (bank unconfirmed) | low_side_out | SL4-A-17 | Auxiliary output 8 | switch_out | corroborated | |
| OEM-E11-8 | O2 sensor heater (bank unconfirmed) | low_side_out | SL4-A-10 | Auxiliary output 1 | switch_out | corroborated | |
| OEM-E12-12 | Throttle magnetic clutch + (CL+) | low_side_out | — | — | — | corroborated | |
| OEM-E13-10 | MAF signal (VG) | analog_in | SL4-B-11 | Analog input 1 | analog_in | corroborated | |
| OEM-E13-11 | O2 sensor signal (bank unconfirmed) | lambda_nb_in | SL4-B-22 | Analog input 9 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-E13-12 | O2 sensor signal (bank unconfirmed) | lambda_nb_in | SL4-B-23 | Analog input 10 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-E13-13 | Throttle position sensor 1 (VTA) | analog_in | SL4-B-12 | Analog input 2 | analog_in | corroborated | |
| OEM-E13-14 | Engine coolant temp (THW) | temp_in | SL4-B-19 | Analog input 6 | analog_in | corroborated | |
| OEM-E13-15 | VVT position sensor RH (VVR+) | trigger_in | — | — | — | corroborated | |
| OEM-E13-16 | VVT position sensor LH (VVL+) | trigger_in | — | — | — | corroborated | |
| OEM-E13-17 | ECU ground (E1) | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | corroborated | |
| OEM-E13-18 | Sensor ground (E2) | sensor_ground | SL4-B-10 + SL4-B-8 | Analog sensor 0V reference + Sync sensor − | sensor_ground + trigger_in | corroborated | |
| OEM-E13-19 | MAF ground (EVG) | sensor_ground | SL4-B-10 + SL4-B-8 | Analog sensor 0V reference + Sync sensor − | sensor_ground + trigger_in | corroborated | |
| OEM-E13-2 | +5V sensor reference (VC) | vref | SL4-B-2 | Sensor supply Vref1 5.0V | vref | corroborated | |
| OEM-E13-20 | Throttle position sensor 2 (VTA2) | analog_in | SL4-B-14 | Analog input 4 | analog_in | corroborated | |
| OEM-E13-21 | Accelerator pedal position 1 (VPA) | analog_in | SL4-B-13 | Analog input 3 | analog_in | corroborated | |
| OEM-E13-22 | Intake air temp (THA) | temp_in | — | — | — | corroborated | |
| OEM-E13-23 | VVT position sensor RH (VVR−) | trigger_in | — | — | — | corroborated | |
| OEM-E13-24 | VVT position sensor LH (VVL−) | trigger_in | — | — | — | corroborated | |
| OEM-E13-3 | O2 sensor heater (bank unconfirmed) | low_side_out | SL4-A-11 | Auxiliary output 2 | switch_out | corroborated | |
| OEM-E13-4 | O2 sensor heater (bank unconfirmed) | low_side_out | SL4-A-12 | Auxiliary output 3 | switch_out | corroborated | |
| OEM-E13-5 | Injector 1 (cyl 1) | injector_out | SL4-A-1 | Injection channel 1 | injector_out | corroborated | |
| OEM-E13-6 | Injector 2 (cyl 2) | injector_out | SL4-A-2 | Injection channel 2 | injector_out | corroborated | |
| OEM-E13-8 | Throttle magnetic clutch − (CL−) | low_side_out | — | — | — | corroborated | |
| OEM-E13-9 | Accelerator pedal position 2 (VPA2) | analog_in | SL4-B-15 | Analog input 5 | analog_in | corroborated | |
| OEM-E14-1 | Injector 3 (cyl 3) | injector_out | SL4-A-3 | Injection channel 3 | injector_out | corroborated | |
| OEM-E14-10 | Camshaft position sensor (G2) | trigger_in | SL4-B-7 | Sync sensor + | trigger_in | corroborated | |
| OEM-E14-11 | Ignition coil 1 (IGT1) | ignition_out | SL4-A-26 | Ignition channel 1 | ignition_out | corroborated | |
| OEM-E14-12 | Ignition coil 2 (IGT2) | ignition_out | SL4-A-27 | Ignition channel 2 | ignition_out | corroborated | |
| OEM-E14-13 | Ignition coil 3 (IGT3) | ignition_out | SL4-A-28 | Ignition channel 3 | ignition_out | corroborated | |
| OEM-E14-14 | Ignition coil 4 (IGT4) | ignition_out | SL4-A-29 | Ignition channel 4 | ignition_out | corroborated | |
| OEM-E14-15 | Ignition coil 5 (IGT5) | ignition_out | — | — | — | corroborated | |
| OEM-E14-16 | Ignition coil 6 (IGT6) | ignition_out | — | — | — | corroborated | |
| OEM-E14-17 | Knock sensor RH (KNKR) | knock_in | SL4-B-24 | Knock 2 + | knock_in | corroborated | |
| OEM-E14-18 | Knock sensor LH (KNKL) | knock_in | SL4-B-16 | Knock 1 + | knock_in | corroborated | |
| OEM-E14-19 | VVT oil-control valve LH (OCV−) | low_side_out | — | — | — | corroborated | |
| OEM-E14-2 | Injector 4 (cyl 4) | injector_out | SL4-A-4 | Injection channel 4 | injector_out | corroborated | |
| OEM-E14-20 | VVT oil-control valve LH (OCV+) | low_side_out | SL4-A-14 | Auxiliary output 5 | switch_out | corroborated | |
| OEM-E14-21 | Power/injector ground (E01) | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | corroborated | |
| OEM-E14-22 | Crank position sensor (NE−) | trigger_in | SL4-B-6 | Crank index sensor − | trigger_in | corroborated | |
| OEM-E14-23 | Crank position sensor (NE+) | trigger_in | SL4-B-5 | Crank index sensor + | trigger_in | corroborated | |
| OEM-E14-25 | Ignition coil 7 (IGT7) | ignition_out | — | — | — | corroborated | |
| OEM-E14-26 | Ignition coil 8 (IGT8) | ignition_out | — | — | — | corroborated | |
| OEM-E14-27 | Ignition confirmation 1 (IGF1) | digital_in | SL4-A-20 | Digital input 1 | digital_in | corroborated | |
| OEM-E14-28 | Ignition confirmation 2 (IGF2) | digital_in | SL4-A-21 | Digital input 2 | digital_in | corroborated | |
| OEM-E14-29 | ACIS induction VSV | low_side_out | — | — | — | corroborated | |
| OEM-E14-3 | Injector 5 (cyl 5) | injector_out | SL4-A-1 | Injection channel 1 | injector_out | corroborated | |
| OEM-E14-4 | Injector 6 (cyl 6) | injector_out | SL4-A-2 | Injection channel 2 | injector_out | corroborated | |
| OEM-E14-5 | Injector 7 (cyl 7) | injector_out | SL4-A-3 | Injection channel 3 | injector_out | corroborated | |
| OEM-E14-6 | Injector 8 (cyl 8) | injector_out | SL4-A-4 | Injection channel 4 | injector_out | corroborated | |
| OEM-E14-7 | Throttle motor − (M−) | hbridge_out | SL4-A-19 | Auxiliary output 10 | hbridge_out | corroborated | |
| OEM-E14-8 | Throttle motor + (M+) | hbridge_out | SL4-A-18 | Auxiliary output 9 | hbridge_out | corroborated | |
| OEM-E15-1 | Battery constant (+12V) | power_in | — | — | — | corroborated | |
| OEM-E15-10 | EFI main relay control (MREL) | low_side_out | SL4-A-15 | Auxiliary output 6 | switch_out | corroborated | |
| OEM-E15-11 | OBD-II / DLC3 data (SIL) | serial | — | — | — | corroborated | |
| OEM-E15-16 | ECM power (EFI relay +B) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | corroborated | |
| OEM-E15-5 | Fuel pump relay control (FC) | low_side_out | SL4-A-16 | Auxiliary output 7 | switch_out | corroborated | |
| OEM-E15-6 | Check engine light (W) | low_side_out | — | — | — | corroborated | |
| OEM-E15-7 | ECM power feed (+BM) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | corroborated | |
| OEM-E15-8 | ECM power (EFI relay +B1) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | corroborated | |
| OEM-E15-9 | Ignition switch (+12V) | digital_in | SL4-B-4 | Ignition switch input | digital_in | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-E15-16 | SP-14V-1 | 0.85 | no route | ECM power (EFI relay +B) | — | |
| W2 | OEM-E15-7 | SP-14V-1 | 0.85 | no route | ECM power feed (+BM) | — | |
| W3 | OEM-E15-8 | SP-14V-1 | 0.85 | no route | ECM power (EFI relay +B1) | — | |
| W4 | SP-14V-1 | SL4-A-34 | 0.85 | no route | Aux 9–10 14V supply | — | |
| W5 | SP-14V-1 | SL4-B-1 | 0.85 | no route | ECU 14V supply | — | |
| W6 | OEM-E13-17 | SP-GND-1 | 0.85 | no route | ECU ground (E1) | — | |
| W7 | OEM-E14-21 | SP-GND-1 | 0.85 | no route | Power/injector ground (E01) | — | |
| W8 | SP-GND-1 | SL4-B-18 | 0.85 | no route | ECU ground | — | |
| W9 | SP-GND-1 | SL4-B-26 | 0.85 | no route | ECU ground | — | |
| W10 | OEM-E13-18 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W11 | OEM-E13-19 | SP-0V-1 | 0.5 | no route | MAF ground (EVG) | — | |
| W12 | SP-0V-1 | SL4-B-10 | 0.5 | no route | Analog sensor 0V reference | — | |
| W13 | OEM-E13-2 | SL4-B-2 | 0.5 | no route | +5V sensor reference (VC) | — | |
| W14 | OEM-E14-22 | SL4-B-6 | 0.5 | no route | Crank position sensor (NE−) | — | |
| W15 | OEM-E14-23 | SL4-B-5 | 0.5 | no route | Crank position sensor (NE+) | — | |
| W16 | OEM-E14-10 | SL4-B-7 | 0.5 | no route | Camshaft position sensor (G2) | — | |
| W17 | SP-0V-1 | SL4-B-8 | 0.5 | no route | Sync sensor − | — | |
| W18 | OEM-E14-18 | SL4-B-16 | 0.5 | no route | Knock sensor LH (KNKL) | — | |
| W19 | OEM-E14-17 | SL4-B-24 | 0.5 | no route | Knock sensor RH (KNKR) | — | |
| W20 | OEM-E14-11 | SL4-A-26 | 0.5 | no route | Ignition coil 1 (IGT1) | — | |
| W21 | OEM-E14-12 | SL4-A-27 | 0.5 | no route | Ignition coil 2 (IGT2) | — | |
| W22 | OEM-E14-13 | SL4-A-28 | 0.5 | no route | Ignition coil 3 (IGT3) | — | |
| W23 | OEM-E14-14 | SL4-A-29 | 0.5 | no route | Ignition coil 4 (IGT4) | — | |
| W24 | OEM-E13-5 | SL4-A-1 | 0.5 | no route | Injector 1 (cyl 1) | — | |
| W25 | OEM-E13-6 | SL4-A-2 | 0.5 | no route | Injector 2 (cyl 2) | — | |
| W26 | OEM-E14-1 | SL4-A-3 | 0.5 | no route | Injector 3 (cyl 3) | — | |
| W27 | OEM-E14-2 | SL4-A-4 | 0.5 | no route | Injector 4 (cyl 4) | — | |
| W28 | OEM-E14-3 | SL4-A-1 | 0.5 | no route | Injector 5 (cyl 5) | — | |
| W29 | OEM-E14-4 | SL4-A-2 | 0.5 | no route | Injector 6 (cyl 6) | — | |
| W30 | OEM-E14-5 | SL4-A-3 | 0.5 | no route | Injector 7 (cyl 7) | — | |
| W31 | OEM-E14-6 | SL4-A-4 | 0.5 | no route | Injector 8 (cyl 8) | — | |
| W32 | OEM-E14-7 | SL4-A-19 | 0.5 | no route | Throttle motor − (M−) | — | |
| W33 | OEM-E14-8 | SL4-A-18 | 0.5 | no route | Throttle motor + (M+) | — | |
| W34 | OEM-E15-9 | SL4-B-4 | 0.5 | no route | Ignition switch (+12V) | — | |
| W35 | OEM-E11-19 | SL4-B-3 | 0.5 | no route | VVT oil-control valve RH (OCR+) | — | |
| W36 | OEM-E14-20 | SL4-A-14 | 0.5 | no route | VVT oil-control valve LH (OCV+) | — | |
| W37 | OEM-E13-10 | SL4-B-11 | 0.5 | no route | MAF signal (VG) | — | |
| W38 | OEM-E13-13 | SL4-B-12 | 0.5 | no route | Throttle position sensor 1 (VTA) | — | |
| W39 | OEM-E13-21 | SL4-B-13 | 0.5 | no route | Accelerator pedal position 1 (VPA) | — | |
| W40 | OEM-E13-20 | SL4-B-14 | 0.5 | no route | Throttle position sensor 2 (VTA2) | — | |
| W41 | OEM-E13-9 | SL4-B-15 | 0.5 | no route | Accelerator pedal position 2 (VPA2) | — | |
| W42 | OEM-E13-14 | SL4-B-19 | 0.5 | no route | Engine coolant temp (THW) | — | |
| W43 | OEM-E15-10 | SL4-A-15 | 0.5 | no route | EFI main relay control (MREL) | — | |
| W44 | OEM-E15-5 | SL4-A-16 | 0.5 | no route | Fuel pump relay control (FC) | — | |
| W45 | OEM-E11-7 | SL4-A-17 | 0.5 | no route | O2 sensor heater (bank unconfirmed) | — | |
| W46 | OEM-E11-8 | SL4-A-10 | 0.5 | no route | O2 sensor heater (bank unconfirmed) | — | |
| W47 | OEM-E13-3 | SL4-A-11 | 0.5 | no route | O2 sensor heater (bank unconfirmed) | — | |
| W48 | OEM-E13-4 | SL4-A-12 | 0.5 | no route | O2 sensor heater (bank unconfirmed) | — | |
| W49 | OEM-E11-28 | SL4-A-13 | 0.5 | no route | VVT oil-control valve RH (OCR−) | — | |
| W50 | OEM-E11-18 | SL4-B-20 | 0.5 | no route | O2 sensor signal (bank unconfirmed) | — | |
| W51 | OEM-E11-27 | SL4-B-21 | 0.5 | no route | O2 sensor signal (bank unconfirmed) | — | |
| W52 | OEM-E13-11 | SL4-B-22 | 0.5 | no route | O2 sensor signal (bank unconfirmed) | — | |
| W53 | OEM-E13-12 | SL4-B-23 | 0.5 | no route | O2 sensor signal (bank unconfirmed) | — | |
| W54 | OEM-E14-27 | SL4-A-20 | 0.5 | no route | Ignition confirmation 1 (IGF1) | — | |
| W55 | OEM-E14-28 | SL4-A-21 | 0.5 | no route | Ignition confirmation 2 (IGF2) | — | |
| W56 | OEM-E11-17 | SL4-A-22 | 0.5 | no route | Starter signal (STA) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | 4-1437290-1 | TE | Superseal 1.0 34-way plug, Key 2 | 1.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 45.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (22)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | NET_MERGED | OEM-E13-5 + OEM-E14-3 + SL4-A-1 | 2 different OEM functions share one net: OEM-E13-5 Injector 1 (cyl 1); OEM-E14-3 Injector 5 (cyl 5) |
| error | NET_MERGED | OEM-E13-6 + OEM-E14-4 + SL4-A-2 | 2 different OEM functions share one net: OEM-E13-6 Injector 2 (cyl 2); OEM-E14-4 Injector 6 (cyl 6) |
| error | NET_MERGED | OEM-E14-1 + OEM-E14-5 + SL4-A-3 | 2 different OEM functions share one net: OEM-E14-1 Injector 3 (cyl 3); OEM-E14-5 Injector 7 (cyl 7) |
| error | NET_MERGED | OEM-E14-2 + OEM-E14-6 + SL4-A-4 | 2 different OEM functions share one net: OEM-E14-2 Injector 4 (cyl 4); OEM-E14-6 Injector 8 (cyl 8) |
| error | REQUIRED_UNMAPPED | OEM-E14-15 | Required OEM function "Ignition coil 5 (IGT5)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E14-16 | Required OEM function "Ignition coil 6 (IGT6)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E14-25 | Required OEM function "Ignition coil 7 (IGT7)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E14-26 | Required OEM function "Ignition coil 8 (IGT8)" (ignition_out) is not connected to the new ECU. |
| warn | DBW_MOTOR_CURRENT | SL4-A-18 | Cannot confirm SL4 can drive the throttle motor: SL4-A-18 "Auxiliary output 9" is rated 8.0 A peak, but the motor stall current at OEM-E14-8 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A). |
| warn | DBW_MOTOR_CURRENT | SL4-A-19 | Cannot confirm SL4 can drive the throttle motor: SL4-A-19 "Auxiliary output 10" is rated 8.0 A peak, but the motor stall current at OEM-E14-7 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A). |
| warn | DBW_MOTOR_ISOLATION | SL4-A-34 | SL4-A-34 "Aux 9–10 14V supply" is fed from the same net as the ECU main supply (SL4-B-1). Link's S2000 DBW wiring feeds the throttle-motor supply through a separate isolation relay switched by the ECU, so motor power can be cut on a throttle fault. Add one, or confirm SL4 cuts the H-bridge internally. |
| info | NET_FAMILY | OEM-E11-28 ↔ SL4-A-13 | OEM-E11-28 "VVT oil-control valve RH (OCR−)" [low_side_out] is wired to SL4-A-13 "Auxiliary output 4" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E11-7 ↔ SL4-A-17 | OEM-E11-7 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to SL4-A-17 "Auxiliary output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E11-8 ↔ SL4-A-10 | OEM-E11-8 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to SL4-A-10 "Auxiliary output 1" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E13-14 ↔ SL4-B-19 | OEM-E13-14 "Engine coolant temp (THW)" [temp_in] is wired to SL4-B-19 "Analog input 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-E13-19 ↔ SL4-B-8 | OEM-E13-19 "MAF ground (EVG)" [sensor_ground] is wired to SL4-B-8 "Sync sensor −" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-E13-3 ↔ SL4-A-11 | OEM-E13-3 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to SL4-A-11 "Auxiliary output 2" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E13-4 ↔ SL4-A-12 | OEM-E13-4 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to SL4-A-12 "Auxiliary output 3" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E14-20 ↔ SL4-A-14 | OEM-E14-20 "VVT oil-control valve LH (OCV+)" [low_side_out] is wired to SL4-A-14 "Auxiliary output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E15-10 ↔ SL4-A-15 | OEM-E15-10 "EFI main relay control (MREL)" [low_side_out] is wired to SL4-A-15 "Auxiliary output 6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-E15-5 ↔ SL4-A-16 | OEM-E15-5 "Fuel pump relay control (FC)" [low_side_out] is wired to SL4-A-16 "Auxiliary output 7" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 12 optional OEM pins are not mapped: OEM-E11-5 Diagnostic test (TC); OEM-E12-12 Throttle magnetic clutch + (CL+); OEM-E13-15 VVT position sensor RH (VVR+); OEM-E13-16 VVT position sensor LH (VVL+); OEM-E13-22 Intake air temp (THA); OEM-E13-23 VVT position sensor RH (VVR−); OEM-E13-24 VVT position sensor LH (VVL−); OEM-E13-8 Throttle magnetic clutch − (CL−); OEM-E14-19 VVT oil-control valve LH (OCV−); OEM-E14-29 ACIS induction VSV; OEM-E15-11 OBD-II / DLC3 data (SIL); OEM-E15-6 Check engine light (W) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-E15-1 | 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. Open items: - OEM-E14 15: Ignition coil 5 (IGT5): no free ignition output on Emtron SL4 - OEM-E14 16: Ignition coil 6 (IGT6): no free ignition output on Emtron SL4 - OEM-E14 25: Ignition coil 7 (IGT7): no free ignition output on Emtron SL4 - OEM-E14 26: Ignition coil 8 (IGT8): no free ignition output on Emtron SL4 Not wired: - OEM-E15 1: Battery constant (+12V): Emtron SL4 has no battery-constant input; not needed - OEM-E13 16: VVT position sensor LH (VVL+): no free cam_hall/cam_vr/frequency_in input on Emtron SL4 - OEM-E13 24: VVT position sensor LH (VVL−): no free cam_hall/cam_vr/frequency_in input on Emtron SL4 - OEM-E13 15: VVT position sensor RH (VVR+): no free cam_hall/cam_vr/frequency_in input on Emtron SL4 - OEM-E13 23: VVT position sensor RH (VVR−): no free cam_hall/cam_vr/frequency_in input on Emtron SL4 - SL4-B 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - SL4-B 25: Knock 2 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-E12 12: Throttle magnetic clutch + (CL+): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-E13 8: Throttle magnetic clutch − (CL−): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-E14 19: VVT oil-control valve LH (OCV−): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-E14 29: ACIS induction VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-E15 6: Check engine light (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-E13 22: Intake air temp (THA): no free thermistor/analog_0_5 on Emtron SL4 - OEM-E15 11: OBD-II / DLC3 data (SIL): no free k_line on Emtron SL4 - OEM-E11 5: Diagnostic test (TC): no free k_line on Emtron SL4
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Emtron SL4/SL6/SL8 ECU datasheets | https://docs.emtronaustralia.com.au/engine-management/datasheets/index.html | archive | 2026-10-05 | 1e22846cec94 |
| 4 | vendor_doc | Emtron SL4/SL6/SL8 pinout pages | https://docs.emtronaustralia.com.au/engine-management/wiring/index.html | archive | 2026-10-05 | e52b3da9996a |
| 4 | vendor_doc | Toyota 1UZ-FE (VVT-i) engine manual M1UZ | http://www.epicmarine.com/docs/M1UZrm.pdf | — | — | — |
| 3 | community_copy | 1998 Lexus LS400 ECM terminal voltage chart (RM717U translation) | https://www.renrendoc.com/p-59096353.html | — | — | — |