MX-5 Miata Mazdaspeed 2004-05 (BP-ZET turbo, no VVT) → ECUMASTER EMU PRO 16 (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 | 8: read the Findings page before cutting any wire |
| Size of the job | 2 wires · 5 connectors · 5 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-4-AE | EMUPRO16-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-R | EMUPRO16-C-31 | 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
EMUPRO16-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition 8 | — | — | — | — | — | — | — | — |
| 2 | Injector 1 | — | — | — | — | — | — | — | — |
| 3 | Injector 2 | — | — | — | — | — | — | — | — |
| 4 | Injector 3 | — | — | — | — | — | — | — | — |
| 5 | Injector 4 | — | — | — | — | — | — | — | — |
| 6 | Injector 5 | — | — | — | — | — | — | — | — |
| 7 | Injector 6 | — | — | — | — | — | — | — | — |
| 8 | Injector 7 | — | — | — | — | — | — | — | — |
| 9 | Injector 8 | — | — | — | — | — | — | — | — |
| 10 | Ignition 7 | — | — | — | — | — | — | — | — |
| 11 | Power GND | — | — | — | — | — | — | — | — |
| 12 | +5V source A | — | — | — | — | — | — | — | — |
| 13 | Digital 2 | — | — | — | — | — | — | — | — |
| 14 | Digital 4 | — | — | — | — | — | — | — | — |
| 15 | Digital 8 | — | — | — | — | — | — | — | — |
| 16 | Digital 6 (turbo) | — | — | — | — | — | — | — | — |
| 17 | Power GND | — | — | — | — | — | — | — | — |
| 18 | Ignition 6 | — | — | — | — | — | — | — | — |
| 19 | Power GND | — | — | — | — | — | — | — | — |
| 20 | Digital GND | — | — | — | — | — | — | — | — |
| 21 | Digital 1 (crank) | — | — | — | — | — | — | — | — |
| 22 | Digital 3 | — | — | — | — | — | — | — | — |
| 23 | Digital 7 | — | — | — | — | — | — | — | — |
| 24 | Digital 5 (turbo) | — | — | — | — | — | — | — | — |
| 25 | Auxiliary 9 | — | — | — | — | — | — | — | — |
| 26 | Ignition 5 | — | — | — | — | — | — | — | — |
| 27 | Ignition 4 | — | — | — | — | — | — | — | — |
| 28 | Ignition 3 | — | — | — | — | — | — | — | — |
| 29 | Ignition 2 | — | — | — | — | — | — | — | — |
| 30 | Ignition 1 | — | — | — | — | — | — | — | — |
| 31 | CAN 1 high (PC comm) | — | — | — | — | — | — | — | — |
| 32 | CAN 1 low (PC comm) | — | — | — | — | — | — | — | — |
| 33 | CAN 2 high | — | — | — | — | — | — | — | — |
| 34 | CAN 2 low | — | — | — | — | — | — | — | — |
EMUPRO16-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Auxiliary 1 (WBO heater) | — | — | — | — | — | — | — | — |
| 2 | Auxiliary 2 (WBO heater) | — | — | — | — | — | — | — | — |
| 3 | Auxiliary 3 (WBO heater) | — | — | — | — | — | — | — | — |
| 4 | Auxiliary 4 (WBO heater) | — | — | — | — | — | — | — | — |
| 5 | Auxiliary 5 | — | — | — | — | — | — | — | — |
| 6 | Auxiliary 6 | — | — | — | — | — | — | — | — |
| 7 | Auxiliary 7 | — | — | — | — | — | — | — | — |
| 8 | +12V supply | — | — | — | — | — | — | — | — |
| 9 | Digital GND (flash drive) | — | — | — | — | — | — | — | — |
| 10 | USB D- (flash drive) | — | — | — | — | — | — | — | — |
| 11 | USB D+ (flash drive) | — | — | — | — | — | — | — | — |
| 12 | +5V source A (flash drive) | — | — | — | — | — | — | — | — |
| 13 | Auxiliary 8 | — | — | — | — | — | — | — | — |
| 14 | +12V supply | — | — | — | — | — | — | — | — |
| 15 | +12V switched | — | — | — | — | — | — | — | — |
| 16 | Knock sensor 1 | — | — | — | — | — | — | — | — |
| 17 | Knock sensor 2 | — | — | — | — | — | — | — | — |
| 18 | WBO 2 VGND (LSU 4.9) | — | — | — | — | — | — | — | — |
| 19 | Power GND | — | — | — | — | — | — | — | — |
| 20 | WBO 1 IP (LSU 4.9) | — | — | — | — | — | — | — | — |
| 21 | WBO 1 VS (LSU 4.9) | — | — | — | — | — | — | — | — |
| 22 | WBO 1 RCAL (LSU 4.9) | — | — | — | — | — | — | — | — |
| 23 | WBO 1 VGND (LSU 4.9) | — | — | — | — | — | — | — | — |
| 24 | WBO 2 IP (LSU 4.9) | — | — | — | — | — | — | — | — |
| 25 | WBO 2 VS (LSU 4.9) | — | — | — | — | — | — | — | — |
| 26 | WBO 2 RCAL (LSU 4.9) | — | — | — | — | — | — | — | — |
EMUPRO16-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Auxiliary 10 | — | — | — | — | — | — | — | — |
| 2 | Auxiliary 11 | — | — | — | — | — | — | — | — |
| 3 | Auxiliary 12 | — | — | — | — | — | — | — | — |
| 4 | Analog 7 | — | — | — | — | — | — | — | — |
| 5 | Analog 10 (2k2 pull) | — | — | — | — | — | — | — | — |
| 6 | H-bridge 1A | — | — | — | — | — | — | — | — |
| 7 | H-bridge 2B | — | — | — | — | — | — | — | — |
| 8 | H-bridge 3A | — | — | — | — | — | — | — | — |
| 9 | H-bridge 2A | — | — | — | — | — | — | — | — |
| 10 | Analog 1 (MAP) | — | W1 | — | 0.5 | OEM-4-AE | — | — | — |
| 11 | Analog 3 | — | — | — | — | — | — | — | — |
| 12 | Analog 5 | — | — | — | — | — | — | — | — |
| 13 | Analog 8 | — | — | — | — | — | — | — | — |
| 14 | Analog 11 (2k2 pull) | — | — | — | — | — | — | — | — |
| 15 | Analog 13 (1k pull) | — | — | — | — | — | — | — | — |
| 16 | Analog 15 (330R pull) | — | — | — | — | — | — | — | — |
| 17 | H-bridge 3B | — | — | — | — | — | — | — | — |
| 18 | Analog 2 | — | — | — | — | — | — | — | — |
| 19 | Analog 4 | — | — | — | — | — | — | — | — |
| 20 | Analog 6 | — | — | — | — | — | — | — | — |
| 21 | Analog 9 (2k2 pull) | — | — | — | — | — | — | — | — |
| 22 | Analog 12 (2k2 pull) | — | — | — | — | — | — | — | — |
| 23 | Analog 14 (1k pull) | — | — | — | — | — | — | — | — |
| 24 | Analog 16 (100R pull) | — | — | — | — | — | — | — | — |
| 25 | H-bridge 1B | — | — | — | — | — | — | — | — |
| 26 | LIN | — | — | — | — | — | — | — | — |
| 27 | +5V source B | — | — | — | — | — | — | — | — |
| 28 | +5V source B | — | — | — | — | — | — | — | — |
| 29 | Analog GND | — | — | — | — | — | — | — | — |
| 30 | Power GND | — | — | — | — | — | — | — | — |
| 31 | Precision analog 1 | — | W2 | — | 0.5 | OEM-4-R | — | — | — |
| 32 | Precision analog 2 | — | — | — | — | — | — | — | — |
| 33 | Precision analog 3 | — | — | — | — | — | — | — | — |
| 34 | Precision analog 4 | — | — | — | — | — | — | — | — |
EMUPRO16-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 10 | — | — | — | — | — | — | — | — |
| 2 | Injector 11 | — | — | — | — | — | — | — | — |
| 3 | Injector 12 | — | — | — | — | — | — | — | — |
| 4 | Injector 13 | — | — | — | — | — | — | — | — |
| 5 | Injector 14 | — | — | — | — | — | — | — | — |
| 6 | Injector 15 | — | — | — | — | — | — | — | — |
| 7 | Injector 16 | — | — | — | — | — | — | — | — |
| 8 | Injector 9 | — | — | — | — | — | — | — | — |
| 9 | Analog 17 | — | — | — | — | — | — | — | — |
| 10 | Analog 18 | — | — | — | — | — | — | — | — |
| 11 | Digital 9 / Analog 19 | — | — | — | — | — | — | — | — |
| 12 | Digital 10 / Analog 20 | — | — | — | — | — | — | — | — |
| 13 | Auxiliary 13 | — | — | — | — | — | — | — | — |
| 14 | H-bridge 4A | — | — | — | — | — | — | — | — |
| 15 | Precision analog 6 | — | — | — | — | — | — | — | — |
| 16 | Precision analog 8 | — | — | — | — | — | — | — | — |
| 17 | Analog GND | — | — | — | — | — | — | — | — |
| 18 | Power GND | — | — | — | — | — | — | — | — |
| 19 | Auxiliary 14 | — | — | — | — | — | — | — | — |
| 20 | H-bridge 4B | — | — | — | — | — | — | — | — |
| 21 | Precision analog 5 | — | — | — | — | — | — | — | — |
| 22 | Precision analog 7 | — | — | — | — | — | — | — | — |
| 23 | Ignition 9 | — | — | — | — | — | — | — | — |
| 24 | Ignition 10 | — | — | — | — | — | — | — | — |
| 25 | Auxiliary 16 | — | — | — | — | — | — | — | — |
| 26 | Auxiliary 15 | — | — | — | — | — | — | — | — |
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) | — | W1 | — | 0.5 | EMUPRO16-C-10 | — | — | — |
| D | Boost control solenoid (turbo) | — | — | — | — | — | — | — | — |
| E | Boost control solenoid (turbo) | — | — | — | — | — | — | — | — |
| R | Intake air temperature 2 (IAT2, turbo) | — | W2 | — | 0.5 | EMUPRO16-C-31 | — | — | — |
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 | EMUPRO16-C-10 | Analog 1 (MAP) | analog_in | LY | single_source |
| OEM-4-D | Boost control solenoid (turbo) | high_side_out | — | — | — | Y | single_source |
| OEM-4-E | Boost control solenoid (turbo) | high_side_out | — | — | — | Y | single_source |
| OEM-4-R | Intake air temperature 2 (IAT2, turbo) | temp_in | EMUPRO16-C-31 | Precision analog 1 | analog_in | VY | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-4-AE | EMUPRO16-C-10 | 0.5 | no route | BARO/MAP sensor (turbo boost pressure) | — | |
| W2 | OEM-4-R | EMUPRO16-C-31 | 0.5 | no route | Intake air temperature 2 (IAT2, turbo) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 1473416-1 | TE | Superseal 1.0 26-way plug, Key 3 | 1.000 | ea |
| connector | 3-1437290-7 | TE | Superseal 1.0 26-way plug | 1.000 | ea |
| 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) | 2.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (10)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | EMUPRO16-A-11 | EMUPRO16-A-11 "Power GND" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-A-17 | EMUPRO16-A-17 "Power GND" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-A-19 | EMUPRO16-A-19 "Power GND" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-B-14 | EMUPRO16-B-14 "+12V supply" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-B-19 | EMUPRO16-B-19 "Power GND" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-B-8 | EMUPRO16-B-8 "+12V supply" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-C-30 | EMUPRO16-C-30 "Power GND" is required but not wired. |
| error | PHYS_REQUIRED_OPEN | EMUPRO16-D-18 | EMUPRO16-D-18 "Power GND" is required but not wired. |
| info | NET_FAMILY | OEM-4-R ↔ EMUPRO16-C-31 | OEM-4-R "Intake air temperature 2 (IAT2, turbo)" [temp_in] is wired to EMUPRO16-C-31 "Precision analog 1" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | UNMAPPED | OEM | 3 optional OEM pins are not mapped: OEM-4-AC Data link connector (DLC TEN, turbo); OEM-4-D Boost control solenoid (turbo); OEM-4-E Boost control solenoid (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 - EMUPRO16-A 11: Power GND: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-A 17: Power GND: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-A 19: Power GND: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-B 14: +12V supply: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-B 19: Power GND: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-B 8: +12V supply: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-C 30: Power GND: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand - EMUPRO16-D 18: Power GND: required by ECUMASTER EMU PRO 16 but no stock pin feeds it; wire by hand Not wired: - OEM-4 D: Boost control solenoid (turbo): no free high_side/ls_hs on ECUMASTER EMU PRO 16 - OEM-4 E: Boost control solenoid (turbo): no free high_side/ls_hs on ECUMASTER EMU PRO 16 - OEM-4 AC: Data link connector (DLC TEN, turbo): no free k_line on ECUMASTER EMU PRO 16 - EMUPRO16-B 15: +12V switched: 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 | ECUMASTER EMU PRO 16 — pinout (Connectors A/B/C/D) | https://www.ecumaster.com/files/EMU_PRO/EMU_PRO_16_Pinout_v1.0.pdf | archive | 2026-10-05 | 72799bed63fb |