MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) → ECUMASTER EMU Black (auto)
MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) — ECUMASTER — EMU Black
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-05
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 | — | W30 | — | 0.5 | OEM-1-C | — | — | — |
| 11 | RS232 TXD | — | — | — | — | — | — | — | — |
| 12 | CAN H | — | — | — | — | — | — | — | — |
| 13 | Battery +12V | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Ignition coil #4 | — | — | — | — | — | — | — | — |
| 15 | EGT in #2 | — | — | — | — | — | — | — | — |
| 16 | Knock Sensor in #2 | — | — | — | — | — | — | — | — |
| 17 | Analog In #3 | — | W34 | — | 0.5 | OEM-1-V | — | — | — |
| 18 | TPS In | — | — | — | — | — | — | — | — |
| 19 | WBO Ip | — | — | — | — | — | — | — | — |
| 2 | EGT in #1 | — | — | — | — | — | — | — | — |
| 20 | VSS In | — | W33 | — | 0.5 | OEM-1-Q | — | — | — |
| 21 | Camsync In #1 | — | W17 | — | 0.5 | OEM-2-G | — | — | — |
| 22 | WBO Rcal | — | — | — | — | — | — | — | — |
| 23 | Switch #2 In | — | W31 | — | 0.5 | OEM-1-N | — | — | — |
| 24 | RS232 RXD | — | — | — | — | — | — | — | — |
| 25 | CAN L | — | — | — | — | — | — | — | — |
| 26 | +5V supply | — | W15 | — | 0.5 | OEM-2-K | — | — | — |
| 27 | Power Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 28 | Ecu Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 29 | Sensor Ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock Sensor in #1 | — | — | — | — | — | — | — | — |
| 30 | Analog In #4 | — | W35 | — | 0.5 | OEM-2-L | — | — | — |
| 31 | Analog In #1 | — | W26 | — | 0.5 | OEM-2-O | — | — | — |
| 32 | IAT In | — | W28 | — | 0.5 | OEM-2-Q | — | — | — |
| 33 | WBO VGND | — | — | — | — | — | — | — | — |
| 34 | +5V supply | — | — | — | — | — | — | — | — |
| 35 | Analog In #5 | — | — | — | — | — | — | — | — |
| 36 | Switch #3 In | — | W32 | — | 0.5 | OEM-1-P | — | — | — |
| 37 | Analog In #6 | — | — | — | — | — | — | — | — |
| 38 | Sensor Ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 39 | Sensor Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 4 | Analog In #2 | — | W27 | — | 0.5 | OEM-2-N | — | — | — |
| 5 | CLT In | — | W29 | — | 0.5 | OEM-2-P | — | — | — |
| 6 | WBO Vs | — | — | — | — | — | — | — | — |
| 7 | Camsync In #2 | — | — | — | — | — | — | — | — |
| 8 | Primary trigger | — | W16 | — | 0.5 | OEM-2-E | — | — | — |
| 9 | Flex Fuel In | — | — | — | — | — | — | — | — |
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 | — | — | — | — | — | — | — | — |
| 13 | AUX 2 / Injector #8 | — | W25 | — | 0.5 | OEM-2-I | — | — | — |
| 14 | Injector #5 | — | — | — | — | — | — | — | — |
| 15 | Injector #2 | — | W21 | — | 0.5 | OEM-2-V | — | — | — |
| 16 | Ignition coil #2 | — | W19 | — | 0.5 | OEM-1-H | — | — | — |
| 17 | Power Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Ignition +12V | — | — | — | — | — | — | — | — |
| 19 | WBO Heater | — | — | — | — | — | — | — | — |
| 2 | H-Bridge #1 Winding A | — | — | — | — | — | — | — | — |
| 20 | AUX 4 / Tacho | — | — | — | — | — | — | — | — |
| 21 | AUX 1 / Injector #7 | — | W24 | — | 0.5 | OEM-1-E | — | — | — |
| 22 | Injector #6 | — | — | — | — | — | — | — | — |
| 23 | Injector #3 | — | W22 | — | 0.5 | OEM-2-Y | — | — | — |
| 24 | Power Ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | H-Bridge #2 Winding A | — | — | — | — | — | — | — | — |
| 4 | AUX 6 | — | — | — | — | — | — | — | — |
| 5 | AUX 3 | — | — | — | — | — | — | — | — |
| 6 | Injector #4 | — | W23 | — | 0.5 | OEM-2-Z | — | — | — |
| 7 | Injector #1 | — | W20 | — | 0.5 | OEM-2-U | — | — | — |
| 8 | Ignition coil #1 | — | W18 | — | 0.5 | OEM-1-G | — | — | — |
| 9 | Ignition coil #3 | — | — | — | — | — | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | — | — | — | — | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| C | Start signal | — | W30 | — | 0.5 | EMUBLACK-Black-10 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W24 | — | 0.5 | EMUBLACK-Grey-21 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W18 | — | 0.5 | EMUBLACK-Grey-8 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W19 | — | 0.5 | EMUBLACK-Grey-16 | — | — | — |
| N | Wide-open throttle switch | — | W31 | — | 0.5 | EMUBLACK-Black-23 | — | — | — |
| P | Power steering pressure switch | — | W32 | — | 0.5 | EMUBLACK-Black-36 | — | — | — |
| Q | A/C request | — | W33 | — | 0.5 | EMUBLACK-Black-20 | — | — | — |
| V | Neutral/clutch switch | — | W34 | — | 0.5 | EMUBLACK-Black-17 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| D | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Crank position (CAS NE) | — | W16 | — | 0.5 | EMUBLACK-Black-8 | — | — | — |
| F | AFM ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Cam position (CAS G) | — | W17 | — | 0.5 | EMUBLACK-Black-21 | — | — | — |
| I | Tachometer output | — | W25 | — | 0.5 | EMUBLACK-Grey-13 | — | — | — |
| K | +5V sensor supply | — | W15 | — | 0.5 | EMUBLACK-Black-26 | — | — | — |
| L | Idle switch (TPS) | — | W35 | — | 0.5 | EMUBLACK-Black-30 | — | — | — |
| N | O2 sensor | — | W27 | — | 0.5 | EMUBLACK-Black-4 | — | — | — |
| O | Air flow meter (AFM) | — | W26 | — | 0.5 | EMUBLACK-Black-31 | — | — | — |
| P | Intake air temperature (IAT) | — | W29 | — | 0.5 | EMUBLACK-Black-5 | — | — | — |
| Q | Coolant temperature (ECT) | — | W28 | — | 0.5 | EMUBLACK-Black-32 | — | — | — |
| U | Injector 1 | — | W20 | — | 0.5 | EMUBLACK-Grey-7 | — | — | — |
| V | Injector 2 | — | W21 | — | 0.5 | EMUBLACK-Grey-15 | — | — | — |
| Y | Injector 3 | — | W22 | — | 0.5 | EMUBLACK-Grey-23 | — | — | — |
| Z | Injector 4 | — | W23 | — | 0.5 | EMUBLACK-Grey-6 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-2-F | — | — | — |
| 1 | — | — | W12 | — | 0.5 | EMUBLACK-Black-29 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | EMUBLACK-Black-38 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | EMUBLACK-Black-39 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | EMUBLACK-Black-13 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.85 | OEM-2-A | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-2-B | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-2-C | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-2-D | — | — | — |
| 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-1-A | Constant +12V | power_in | — | — | — | single_source | |
| OEM-1-B | ECU power +14V (main relay) | power_in | EMUBLACK-Black-13 | Battery +12V | power_in | single_source | |
| OEM-1-C | Start signal | digital_in | EMUBLACK-Black-10 | Switch #1 In | digital_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | EMUBLACK-Grey-21 | AUX 1 / Injector #7 | low_side_out | single_source | |
| OEM-1-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | EMUBLACK-Grey-8 | Ignition coil #1 | ignition_out | single_source | |
| OEM-1-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | EMUBLACK-Grey-16 | Ignition coil #2 | ignition_out | single_source | |
| OEM-1-N | Wide-open throttle switch | digital_in | EMUBLACK-Black-23 | Switch #2 In | digital_in | single_source | |
| OEM-1-P | Power steering pressure switch | digital_in | EMUBLACK-Black-36 | Switch #3 In | digital_in | single_source | |
| OEM-1-Q | A/C request | digital_in | EMUBLACK-Black-20 | VSS In | digital_in | single_source | |
| OEM-1-V | Neutral/clutch switch | digital_in | EMUBLACK-Black-17 | Analog In #3 | analog_in | single_source | |
| OEM-2-A | Power ground | 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-2-B | Power ground | 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-2-C | Power ground | 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-2-D | Power ground | 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-2-E | Crank position (CAS NE) | trigger_in | EMUBLACK-Black-8 | Primary trigger | trigger_in | single_source | |
| OEM-2-F | AFM ground | sensor_ground | EMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39 | Sensor Ground + Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-2-G | Cam position (CAS G) | trigger_in | EMUBLACK-Black-21 | Camsync In #1 | trigger_in | single_source | |
| OEM-2-I | Tachometer output | tacho_out | EMUBLACK-Grey-13 | AUX 2 / Injector #8 | low_side_out | single_source | |
| OEM-2-K | +5V sensor supply | vref | EMUBLACK-Black-26 | +5V supply | vref | single_source | |
| OEM-2-L | Idle switch (TPS) | digital_in | EMUBLACK-Black-30 | Analog In #4 | analog_in | single_source | |
| OEM-2-N | O2 sensor | lambda_nb_in | EMUBLACK-Black-4 | Analog In #2 | analog_in | single_source | |
| OEM-2-O | Air flow meter (AFM) | analog_in | EMUBLACK-Black-31 | Analog In #1 | analog_in | single_source | |
| OEM-2-P | Intake air temperature (IAT) | temp_in | EMUBLACK-Black-5 | CLT In | temp_in | single_source | |
| OEM-2-Q | Coolant temperature (ECT) | temp_in | EMUBLACK-Black-32 | IAT In | temp_in | single_source | |
| OEM-2-U | Injector 1 | injector_out | EMUBLACK-Grey-7 | Injector #1 | injector_out | single_source | |
| OEM-2-V | Injector 2 | injector_out | EMUBLACK-Grey-15 | Injector #2 | injector_out | single_source | |
| OEM-2-Y | Injector 3 | injector_out | EMUBLACK-Grey-23 | Injector #3 | injector_out | single_source | |
| OEM-2-Z | Injector 4 | injector_out | EMUBLACK-Grey-6 | Injector #4 | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W2 | SP-14V-1 | EMUBLACK-Black-13 | 0.85 | no route | Battery +12V | — | |
| W3 | OEM-2-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W4 | OEM-2-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-2-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-2-D | SP-GND-1 | 0.85 | no route | Power ground | — | |
| 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-2-F | SP-0V-1 | 0.5 | no route | AFM ground | — | |
| W12 | SP-0V-1 | EMUBLACK-Black-29 | 0.5 | no route | Sensor Ground | — | |
| W13 | SP-0V-1 | EMUBLACK-Black-38 | 0.5 | no route | Sensor Ground | — | |
| W14 | SP-0V-1 | EMUBLACK-Black-39 | 0.5 | no route | Sensor Ground | — | |
| W15 | OEM-2-K | EMUBLACK-Black-26 | 0.5 | no route | +5V sensor supply | — | |
| W16 | OEM-2-E | EMUBLACK-Black-8 | 0.5 | no route | Crank position (CAS NE) | — | |
| W17 | OEM-2-G | EMUBLACK-Black-21 | 0.5 | no route | Cam position (CAS G) | — | |
| W18 | OEM-1-G | EMUBLACK-Grey-8 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W19 | OEM-1-H | EMUBLACK-Grey-16 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W20 | OEM-2-U | EMUBLACK-Grey-7 | 0.5 | no route | Injector 1 | — | |
| W21 | OEM-2-V | EMUBLACK-Grey-15 | 0.5 | no route | Injector 2 | — | |
| W22 | OEM-2-Y | EMUBLACK-Grey-23 | 0.5 | no route | Injector 3 | — | |
| W23 | OEM-2-Z | EMUBLACK-Grey-6 | 0.5 | no route | Injector 4 | — | |
| W24 | OEM-1-E | EMUBLACK-Grey-21 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W25 | OEM-2-I | EMUBLACK-Grey-13 | 0.5 | no route | Tachometer output | — | |
| W26 | OEM-2-O | EMUBLACK-Black-31 | 0.5 | no route | Air flow meter (AFM) | — | |
| W27 | OEM-2-N | EMUBLACK-Black-4 | 0.5 | no route | O2 sensor | — | |
| W28 | OEM-2-Q | EMUBLACK-Black-32 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W29 | OEM-2-P | EMUBLACK-Black-5 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W30 | OEM-1-C | EMUBLACK-Black-10 | 0.5 | no route | Start signal | — | |
| W31 | OEM-1-N | EMUBLACK-Black-23 | 0.5 | no route | Wide-open throttle switch | — | |
| W32 | OEM-1-P | EMUBLACK-Black-36 | 0.5 | no route | Power steering pressure switch | — | |
| W33 | OEM-1-Q | EMUBLACK-Black-20 | 0.5 | no route | A/C request | — | |
| W34 | OEM-1-V | EMUBLACK-Black-17 | 0.5 | no route | Neutral/clutch switch | — | |
| W35 | OEM-2-L | EMUBLACK-Black-30 | 0.5 | no route | Idle switch (TPS) | — |
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 (3)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-1-V ↔ EMUBLACK-Black-17 | OEM-1-V "Neutral/clutch switch" [digital_in] is wired to EMUBLACK-Black-17 "Analog In #3" [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-2-L ↔ EMUBLACK-Black-30 | OEM-2-L "Idle switch (TPS)" [digital_in] is wired to EMUBLACK-Black-30 "Analog In #4" [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-2-I ↔ EMUBLACK-Grey-13 | OEM-2-I "Tachometer output" [tacho_out] is wired to EMUBLACK-Grey-13 "AUX 2 / Injector #8" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up. |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-1-A | 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 2026-10-04. Review every wire against both manuals before building. Not wired: - OEM-1 A: Constant +12V: ECUMASTER EMU Black has no battery-constant input; not needed - EMUBLACK-Grey 18: Ignition +12V: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL |
|---|---|---|---|
| 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 |
| 4 | vendor_doc | Link G4X MX5X install manual (NA 1.6/1.8) | https://linkecu.com/documentation/MX5X.pdf |