MX-5 Miata Mazdaspeed 2004-05 (BP-ZET turbo, no VVT) → rusEFI Proteus (auto)
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 | 7: read the Findings page before cutting any wire |
| Size of the job | 4 wires · 4 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-4-D | PROTEUS-Black35-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-E | PROTEUS-Black35-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-4-AE | PROTEUS-White35-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-4-R | PROTEUS-White35-30 | 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 |
|---|---|---|---|---|---|
| No supply/ground nets found to cross-check. | |||||
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| AC | Data link connector (DLC TEN, turbo) | — | — | — | — | — | — | — | — |
| AE | BARO/MAP sensor (turbo boost pressure) | — | W3 | — | 0.5 | PROTEUS-White35-13 | — | — | — |
| D | Boost control solenoid (turbo) | — | W1 | — | 0.5 | PROTEUS-Black35-2 | — | — | — |
| E | Boost control solenoid (turbo) | — | W2 | — | 0.5 | PROTEUS-Black35-1 | — | — | — |
| R | Intake air temperature 2 (IAT2, turbo) | — | W4 | — | 0.5 | PROTEUS-White35-30 | — | — | — |
PROTEUS-Black23
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Digital 2 | — | — | — | — | — | — | — | — |
| 10 | Digital 1 | — | — | — | — | — | — | — | — |
| 11 | Digital 6 | — | — | — | — | — | — | — | — |
| 12 | VR 2 negative | — | — | — | — | — | — | — | — |
| 13 | VR 1 negative | — | — | — | — | — | — | — | — |
| 14 | Power ground | — | — | — | — | — | — | — | — |
| 15 | ETB 2 positive | — | — | — | — | — | — | — | — |
| 16 | CAN 1 Low | — | — | — | — | — | — | — | — |
| 17 | CAN 1 High | — | — | — | — | — | — | — | — |
| 18 | Ignition switch in | — | — | — | — | — | — | — | — |
| 19 | Power ground | — | — | — | — | — | — | — | — |
| 2 | Digital 3 | — | — | — | — | — | — | — | — |
| 20 | Power ground | — | — | — | — | — | — | — | — |
| 21 | CAN 2 Low | — | — | — | — | — | — | — | — |
| 22 | CAN 2 High | — | — | — | — | — | — | — | — |
| 23 | Main relay feed | — | — | — | — | — | — | — | — |
| 3 | Digital 4 | — | — | — | — | — | — | — | — |
| 4 | VR 2 positive | — | — | — | — | — | — | — | — |
| 5 | VR 1 positive | — | — | — | — | — | — | — | — |
| 6 | ETB 1 negative | — | — | — | — | — | — | — | — |
| 7 | ETB 1 positive | — | — | — | — | — | — | — | — |
| 8 | ETB 2 negative | — | — | — | — | — | — | — | — |
| 9 | Digital 5 | — | — | — | — | — | — | — | — |
PROTEUS-Black35
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Highside 2 | — | W2 | — | 0.5 | OEM-4-E | — | — | — |
| 10 | Lowside 13 | — | — | — | — | — | — | — | — |
| 11 | Lowside 14 | — | — | — | — | — | — | — | — |
| 12 | Lowside 15 | — | — | — | — | — | — | — | — |
| 13 | Highside 3 | — | — | — | — | — | — | — | — |
| 14 | Highside 4 | — | — | — | — | — | — | — | — |
| 15 | Injector 2 | — | — | — | — | — | — | — | — |
| 16 | Injector 4 | — | — | — | — | — | — | — | — |
| 17 | Power ground | — | — | — | — | — | — | — | — |
| 18 | Power ground | — | — | — | — | — | — | — | — |
| 19 | Injector 8 | — | — | — | — | — | — | — | — |
| 2 | Highside 1 | — | W1 | — | 0.5 | OEM-4-D | — | — | — |
| 20 | Lowside 10 | — | — | — | — | — | — | — | — |
| 21 | Lowside 12 | — | — | — | — | — | — | — | — |
| 22 | Ignition 3 | — | — | — | — | — | — | — | — |
| 23 | Lowside 16 | — | — | — | — | — | — | — | — |
| 24 | Power ground | — | — | — | — | — | — | — | — |
| 25 | Ignition 12 | — | — | — | — | — | — | — | — |
| 26 | Ignition 11 | — | — | — | — | — | — | — | — |
| 27 | Ignition 10 | — | — | — | — | — | — | — | — |
| 28 | Ignition 9 | — | — | — | — | — | — | — | — |
| 29 | Ignition 8 | — | — | — | — | — | — | — | — |
| 3 | Injector 1 | — | — | — | — | — | — | — | — |
| 30 | Ignition 7 | — | — | — | — | — | — | — | — |
| 31 | Ignition 6 | — | — | — | — | — | — | — | — |
| 32 | Ignition 5 | — | — | — | — | — | — | — | — |
| 33 | Ignition 4 | — | — | — | — | — | — | — | — |
| 34 | Ignition 2 | — | — | — | — | — | — | — | — |
| 35 | Ignition 1 | — | — | — | — | — | — | — | — |
| 4 | Injector 3 | — | — | — | — | — | — | — | — |
| 5 | Injector 5 | — | — | — | — | — | — | — | — |
| 6 | Injector 6 | — | — | — | — | — | — | — | — |
| 7 | Injector 7 | — | — | — | — | — | — | — | — |
| 8 | Injector 9 | — | — | — | — | — | — | — | — |
| 9 | Lowside 11 | — | — | — | — | — | — | — | — |
PROTEUS-White35
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sensor ground | — | — | — | — | — | — | — | — |
| 10 | 5V supply #2 | — | — | — | — | — | — | — | — |
| 11 | 12V sensor supply | — | — | — | — | — | — | — | — |
| 12 | 12V sensor supply | — | — | — | — | — | — | — | — |
| 13 | Analog Volt 1 | — | W3 | — | 0.5 | OEM-4-AE | — | — | — |
| 14 | Analog Volt 3 | — | — | — | — | — | — | — | — |
| 15 | Analog Volt 5 | — | — | — | — | — | — | — | — |
| 16 | Analog Volt 7 | — | — | — | — | — | — | — | — |
| 17 | Analog Volt 9 | — | — | — | — | — | — | — | — |
| 18 | Analog Volt 11 | — | — | — | — | — | — | — | — |
| 19 | Thermistor 1 | — | — | — | — | — | — | — | — |
| 2 | Sensor ground | — | — | — | — | — | — | — | — |
| 20 | Coolant temp (CLT) | — | — | — | — | — | — | — | — |
| 21 | 5V supply #1 | — | — | — | — | — | — | — | — |
| 22 | 5V supply #2 | — | — | — | — | — | — | — | — |
| 23 | Sensor ground | — | — | — | — | — | — | — | — |
| 24 | Analog Volt 2 | — | — | — | — | — | — | — | — |
| 25 | Analog Volt 4 | — | — | — | — | — | — | — | — |
| 26 | Analog Volt 6 | — | — | — | — | — | — | — | — |
| 27 | Analog Volt 8 | — | — | — | — | — | — | — | — |
| 28 | Analog Volt 10 | — | — | — | — | — | — | — | — |
| 29 | Sensor ground | — | — | — | — | — | — | — | — |
| 3 | Sensor ground | — | — | — | — | — | — | — | — |
| 30 | Intake air temp (IAT) | — | W4 | — | 0.5 | OEM-4-R | — | — | — |
| 31 | Thermistor 4 | — | — | — | — | — | — | — | — |
| 32 | 5V supply #1 | — | — | — | — | — | — | — | — |
| 33 | 5V supply #2 | — | — | — | — | — | — | — | — |
| 34 | Knock 1 | — | — | — | — | — | — | — | — |
| 35 | Knock 2 | — | — | — | — | — | — | — | — |
| 4 | Sensor ground | — | — | — | — | — | — | — | — |
| 5 | Sensor ground | — | — | — | — | — | — | — | — |
| 6 | Sensor ground | — | — | — | — | — | — | — | — |
| 7 | Sensor ground | — | — | — | — | — | — | — | — |
| 8 | Sensor ground | — | — | — | — | — | — | — | — |
| 9 | 5V supply #1 | — | — | — | — | — | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-4-AC | Data link connector (DLC TEN, turbo) | serial | — | — | — | BrY | single_source |
| OEM-4-AE | BARO/MAP sensor (turbo boost pressure) | analog_in | PROTEUS-White35-13 | Analog Volt 1 | analog_in | LY | single_source |
| OEM-4-D | Boost control solenoid (turbo) | high_side_out | PROTEUS-Black35-2 | Highside 1 | high_side_out | Y | single_source |
| OEM-4-E | Boost control solenoid (turbo) | high_side_out | PROTEUS-Black35-1 | Highside 2 | high_side_out | Y | single_source |
| OEM-4-R | Intake air temperature 2 (IAT2, turbo) | temp_in | PROTEUS-White35-30 | Intake air temp (IAT) | temp_in | VY | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-4-D | PROTEUS-Black35-2 | 0.5 | no route | Boost control solenoid (turbo) | — | |
| W2 | OEM-4-E | PROTEUS-Black35-1 | 0.5 | no route | Boost control solenoid (turbo) | — | |
| W3 | OEM-4-AE | PROTEUS-White35-13 | 0.5 | no route | BARO/MAP sensor (turbo boost pressure) | — | |
| W4 | OEM-4-R | PROTEUS-White35-30 | 0.5 | no route | Intake air temperature 2 (IAT2, turbo) | — |
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 (8)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black23-14 | PROTEUS-Black23-14 "Power ground" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black23-19 | PROTEUS-Black23-19 "Power ground" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black23-20 | PROTEUS-Black23-20 "Power ground" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black23-23 | PROTEUS-Black23-23 "Main relay feed" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black35-17 | PROTEUS-Black35-17 "Power ground" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black35-18 | PROTEUS-Black35-18 "Power ground" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | PROTEUS-Black35-24 | PROTEUS-Black35-24 "Power ground" is required but not wired. |
| info | UNMAPPED | OEM | 1 optional OEM pins are not mapped: OEM-4-AC Data link connector (DLC TEN, turbo) |
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: - Main-relay feed: no ecu_main_power pin on the stock or the new ECU - PROTEUS-Black23 14: Power ground: required by rusEFI Proteus but no stock pin feeds it; wire by hand - PROTEUS-Black23 19: Power ground: required by rusEFI Proteus but no stock pin feeds it; wire by hand - PROTEUS-Black23 20: Power ground: required by rusEFI Proteus but no stock pin feeds it; wire by hand - PROTEUS-Black23 23: Main relay feed: required by rusEFI Proteus but no stock pin feeds it; wire by hand - PROTEUS-Black35 17: Power ground: required by rusEFI Proteus but no stock pin feeds it; wire by hand - PROTEUS-Black35 18: Power ground: required by rusEFI Proteus but no stock pin feeds it; wire by hand - PROTEUS-Black35 24: Power ground: required by rusEFI Proteus but no stock pin feeds it; wire by hand Not wired: - OEM-4 AC: Data link connector (DLC TEN, turbo): no free k_line on rusEFI Proteus - PROTEUS-Black23 18: Ignition switch in: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | oem_manual | 2005 Mazda MX-5 Miata Engine Performance Control System (PCM terminal voltage reference, BP and BP WITH TC) | https://trull.org/alex/pubmirror/www.mellens.net/mazda/Mazda-Miata-2005/engine_control_system.pdf | — | — | — |
| 4 | vendor_doc | Adaptronic eSel039 Select Plugin ECU for Mazda MX5 / Miata NB8B/C (OEM ECU pinout) | https://www.miataturbo.net/attachments/ecus-tuning-54/04-msm-ecu-pinout-104032/nb8bc_oem_ecu_pinouts-224948d1602912806 | — | — | — |
| 4 | vendor_doc | rusEFI Proteus — board connector definitions (Black35 / White35 / Black23) | https://github.com/rusefi/rusefi/tree/master/firmware/config/boards/proteus/connectors | archive | 2026-10-05 | 738a2ea934c0 |