LSU 4.9 wideband sub-harness
Emtron — KV8
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-04
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
KV8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | — | — | — | — | — | — | — |
| 2 | — | — | — | — | — | — | — | — | — |
| 3 | — | — | — | — | — | — | — | — | — |
| 4 | — | — | — | — | — | — | — | — | — |
| 5 | — | — | — | — | — | — | — | — | — |
| 6 | — | — | — | — | — | — | — | — | — |
| 7 | — | — | — | — | — | — | — | — | — |
| 8 | — | — | — | — | — | — | — | — | — |
| 9 | — | — | — | — | — | — | — | — | — |
| 10 | Lambda 1 heater − | — | W3 | W | — | S1-3 | SKT-1.5 | — | — |
| 11 | Lambda 2 heater − | — | — | — | — | — | — | — | — |
| 12 | — | — | — | — | — | — | — | — | — |
| 13 | — | — | — | — | — | — | — | — | — |
| 14 | — | — | — | — | — | — | — | — | — |
| 15 | — | — | — | — | — | — | — | — | — |
| 16 | Lambda 1 heater + | — | W4 | Gy | — | S1-4 | SKT-1.5 | — | — |
| 17 | Lambda 2 heater + | — | — | — | — | — | — | — | — |
| 18 | Lambda 1 Nernst cell (Vs) | — | W6 | B | — | S1-6 | SKT-0.64 | — | — |
| 19 | — | — | — | — | — | — | — | — | — |
| 20 | Lambda 2 cal resistor | — | — | — | — | — | — | — | — |
| 21 | Lambda 2 Nernst cell (Vs) | — | — | — | — | — | — | — | — |
| 22 | Lambda 2 pump cell (Ip) | — | — | — | — | — | — | — | — |
| 23 | Lambda 2 virtual ground | — | — | — | — | — | — | — | — |
| 24 | Lambda 1 cal resistor | — | W5 | G | — | S1-5 | SKT-0.64 | — | — |
| 25 | Lambda 1 pump cell (Ip) | — | W1 | R | — | S1-1 | SKT-0.64 | — | — |
| 26 | Lambda 1 virtual ground | — | W2 | Y | — | S1-2 | SKT-0.64 | — | — |
S1
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Pump current (Ip) | — | W1 | R | — | KV8-A-25 | SKT-1.5 | — | — |
| 2 | Virtual ground (VM) | — | W2 | Y | — | KV8-A-26 | SKT-1.5 | — | — |
| 3 | Heater − | — | W3 | W | — | KV8-A-10 | SKT-1.5 | — | — |
| 4 | Heater + | — | W4 | Gy | — | KV8-A-16 | SKT-1.5 | — | — |
| 5 | Trim resistor (IA) | — | W5 | G | — | KV8-A-24 | SKT-1.5 | — | — |
| 6 | Nernst cell (UN) | — | W6 | B | — | KV8-A-18 | SKT-1.5 | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| No mapped pins. | |||||||
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | KV8-A-25 | S1-1 | 0.5 | R | 2060 mm | Lambda 1 pump cell (Ip) | LSU IP |
| W2 | KV8-A-26 | S1-2 | 0.5 | Y | 2060 mm | Lambda 1 virtual ground | LSU VM |
| W3 | KV8-A-10 | S1-3 | 0.75 | W | 2060 mm | Lambda 1 heater − | LSU H− |
| W4 | KV8-A-16 | S1-4 | 0.75 | Gy | 2060 mm | Lambda 1 heater + | LSU H+ |
| W5 | KV8-A-24 | S1-5 | 0.5 | G | 2060 mm | Lambda 1 cal resistor | LSU IA |
| W6 | KV8-A-18 | S1-6 | 0.5 | B | 2060 mm | Lambda 1 Nernst cell (Vs) | LSU UN |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 3-1437290-8 | TE | Superseal 1.0 26-way plug, Key 2 | 1.000 | ea |
| connector | LSU49-MATING-6W | Bosch | LSU 4.9 mating plug, 6-way (placeholder P/N) | 1.000 | ea |
| covering | BRAID-6 | Generic | Braided sleeve 6 mm | 0.800 | m |
| covering | HS-FIRE | Generic | Fire sleeve, exhaust side | 0.500 | m |
| terminal | SKT-0.64 | Generic | 0.64 mm socket | 4.000 | ea |
| terminal | SKT-1.5 | Generic | 1.5 mm socket | 8.000 | ea |
| wire | TXL-0.5 | Generic | TXL 0.5 mm² | 8.240 | m |
| wire | TXL-0.75 | Generic | TXL 0.75 mm² | 4.120 | m |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (1)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | DATASET_GAP | KV8 A | 14 of 26 cavities on KV8 A have no pin data (1,2,3,4,5,6,7,8,9,12,13,14,15,19). Anything there is invisible to these checks. |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
No notes.
Sources
| Reliability | Kind | Title | URL |
|---|---|---|---|
| 2 | derived | Commonly published Bosch LSU 4.9 pinout | — |
| 2 | user_dataset | Subaru ECU Matcher dataset (hiubin), vehicleId=1 | — |