MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) → MaxxECU MaxxECU STREET REV9+ (auto)
MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) — MaxxECU — MaxxECU STREET
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-05
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MAXXECUSTREE-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A2 | IGN 1 | — | W14 | — | 0.5 | OEM-1-G | — | — | — |
| A3 | IGN 2 | — | W15 | — | 0.5 | OEM-1-H | — | — | — |
| A4 | GPO 8/TACHO | — | — | — | — | — | — | — | — |
| B2 | IGN 3 | — | — | — | — | — | — | — | — |
| B3 | IGN 4 | — | — | — | — | — | — | — | — |
| B4 | GPO 1 | — | W20 | — | 0.5 | OEM-1-E | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W21 | — | 0.5 | OEM-2-I | — | — | — |
| D1 | WBO2 Heater- | — | — | — | — | — | — | — | — |
| D4 | GPO 3 | — | — | — | — | — | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| F1 | CLT | — | — | — | — | — | — | — | — |
| F2 | IAT | — | — | — | — | — | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W11 | — | 0.5 | OEM-2-K | — | — | — |
| G2 | TPS/AIN | — | — | — | — | — | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W12 | — | 0.5 | OEM-2-E | — | — | — |
| H4 | HOME | — | W13 | — | 0.5 | OEM-2-G | — | — | — |
| J1 | AIN 1 (temperature) | — | W24 | — | 0.5 | OEM-2-Q | — | — | — |
| J2 | AIN 2 (Temperature) | — | W25 | — | 0.5 | OEM-2-P | — | — | — |
| J3 | AIN 3 (0-5V) | — | W22 | — | 0.5 | OEM-2-O | — | — | — |
| J4 | AIN 4 (0-5V) | — | W23 | — | 0.5 | OEM-2-N | — | — | — |
| K1 | INJ 1 | — | W16 | — | 0.5 | OEM-2-U | — | — | — |
| K2 | INJ 2 | — | W17 | — | 0.5 | OEM-2-V | — | — | — |
| K3 | DIN 1 | — | W26 | — | 0.5 | OEM-1-C | — | — | — |
| K4 | DIN 2 | — | W27 | — | 0.5 | OEM-1-N | — | — | — |
| L3 | INJ 6 | — | — | — | — | — | — | — | — |
| L4 | Engine GND | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W18 | — | 0.5 | OEM-2-Y | — | — | — |
| M2 | INJ 4 | — | W19 | — | 0.5 | OEM-2-Z | — | — | — |
| M3 | INJ 5 | — | — | — | — | — | — | — | — |
| M4 | +12V ECU power supply | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
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 | — | W26 | — | 0.5 | MAXXECUSTREE-C1-K3 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W20 | — | 0.5 | MAXXECUSTREE-C1-B4 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W14 | — | 0.5 | MAXXECUSTREE-C1-A2 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W15 | — | 0.5 | MAXXECUSTREE-C1-A3 | — | — | — |
| N | Wide-open throttle switch | — | W27 | — | 0.5 | MAXXECUSTREE-C1-K4 | — | — | — |
| P | Power steering pressure switch | — | — | — | — | — | — | — | — |
| Q | A/C request | — | — | — | — | — | — | — | — |
| V | Neutral/clutch switch | — | — | — | — | — | — | — | — |
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) | — | W12 | — | 0.5 | MAXXECUSTREE-C1-H3 | — | — | — |
| F | AFM ground | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Cam position (CAS G) | — | W13 | — | 0.5 | MAXXECUSTREE-C1-H4 | — | — | — |
| I | Tachometer output | — | W21 | — | 0.5 | MAXXECUSTREE-C1-C4 | — | — | — |
| K | +5V sensor supply | — | W11 | — | 0.5 | MAXXECUSTREE-C1-G1 | — | — | — |
| L | Idle switch (TPS) | — | — | — | — | — | — | — | — |
| N | O2 sensor | — | W23 | — | 0.5 | MAXXECUSTREE-C1-J4 | — | — | — |
| O | Air flow meter (AFM) | — | W22 | — | 0.5 | MAXXECUSTREE-C1-J3 | — | — | — |
| P | Intake air temperature (IAT) | — | W25 | — | 0.5 | MAXXECUSTREE-C1-J2 | — | — | — |
| Q | Coolant temperature (ECT) | — | W24 | — | 0.5 | MAXXECUSTREE-C1-J1 | — | — | — |
| U | Injector 1 | — | W16 | — | 0.5 | MAXXECUSTREE-C1-K1 | — | — | — |
| V | Injector 2 | — | W17 | — | 0.5 | MAXXECUSTREE-C1-K2 | — | — | — |
| Y | Injector 3 | — | W18 | — | 0.5 | MAXXECUSTREE-C1-M1 | — | — | — |
| Z | Injector 4 | — | W19 | — | 0.5 | MAXXECUSTREE-C1-M2 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W8 | — | 0.5 | OEM-2-F | — | — | — |
| 1 | — | — | W9 | — | 0.5 | MAXXECUSTREE-C1-H1 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | MAXXECUSTREE-C1-H2 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MAXXECUSTREE-C1-M4 | — | — | — |
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 | MAXXECUSTREE-C1-L4 | — | — | — |
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 | MAXXECUSTREE-C1-M4 | +12V ECU power supply | power_in | single_source | |
| OEM-1-C | Start signal | digital_in | MAXXECUSTREE-C1-K3 | DIN 1 | digital_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | MAXXECUSTREE-C1-B4 | GPO 1 | low_side_out | single_source | |
| OEM-1-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | MAXXECUSTREE-C1-A2 | IGN 1 | ignition_out | single_source | |
| OEM-1-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | MAXXECUSTREE-C1-A3 | IGN 2 | ignition_out | single_source | |
| OEM-1-N | Wide-open throttle switch | digital_in | MAXXECUSTREE-C1-K4 | DIN 2 | digital_in | single_source | |
| OEM-1-P | Power steering pressure switch | digital_in | — | — | — | single_source | |
| OEM-1-Q | A/C request | digital_in | — | — | — | single_source | |
| OEM-1-V | Neutral/clutch switch | digital_in | — | — | — | single_source | |
| OEM-2-A | Power ground | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-2-B | Power ground | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-2-C | Power ground | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-2-D | Power ground | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-2-E | Crank position (CAS NE) | trigger_in | MAXXECUSTREE-C1-H3 | TRIGGER | trigger_in | single_source | |
| OEM-2-F | AFM ground | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-2-G | Cam position (CAS G) | trigger_in | MAXXECUSTREE-C1-H4 | HOME | trigger_in | single_source | |
| OEM-2-I | Tachometer output | tacho_out | MAXXECUSTREE-C1-C4 | GPO 2 | low_side_out | single_source | |
| OEM-2-K | +5V sensor supply | vref | MAXXECUSTREE-C1-G1 | +5V sensor supply | vref | single_source | |
| OEM-2-L | Idle switch (TPS) | digital_in | — | — | — | single_source | |
| OEM-2-N | O2 sensor | lambda_nb_in | MAXXECUSTREE-C1-J4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-2-O | Air flow meter (AFM) | analog_in | MAXXECUSTREE-C1-J3 | AIN 3 (0-5V) | analog_in | single_source | |
| OEM-2-P | Intake air temperature (IAT) | temp_in | MAXXECUSTREE-C1-J2 | AIN 2 (Temperature) | temp_in | single_source | |
| OEM-2-Q | Coolant temperature (ECT) | temp_in | MAXXECUSTREE-C1-J1 | AIN 1 (temperature) | temp_in | single_source | |
| OEM-2-U | Injector 1 | injector_out | MAXXECUSTREE-C1-K1 | INJ 1 | injector_out | single_source | |
| OEM-2-V | Injector 2 | injector_out | MAXXECUSTREE-C1-K2 | INJ 2 | injector_out | single_source | |
| OEM-2-Y | Injector 3 | injector_out | MAXXECUSTREE-C1-M1 | INJ 3 | injector_out | single_source | |
| OEM-2-Z | Injector 4 | injector_out | MAXXECUSTREE-C1-M2 | INJ 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 | MAXXECUSTREE-C1-M4 | 0.85 | no route | +12V ECU power supply | — | |
| 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 | MAXXECUSTREE-C1-L4 | 0.85 | no route | Engine GND | — | |
| W8 | OEM-2-F | SP-0V-1 | 0.5 | no route | AFM ground | — | |
| W9 | SP-0V-1 | MAXXECUSTREE-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W10 | SP-0V-1 | MAXXECUSTREE-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W11 | OEM-2-K | MAXXECUSTREE-C1-G1 | 0.5 | no route | +5V sensor supply | — | |
| W12 | OEM-2-E | MAXXECUSTREE-C1-H3 | 0.5 | no route | Crank position (CAS NE) | — | |
| W13 | OEM-2-G | MAXXECUSTREE-C1-H4 | 0.5 | no route | Cam position (CAS G) | — | |
| W14 | OEM-1-G | MAXXECUSTREE-C1-A2 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W15 | OEM-1-H | MAXXECUSTREE-C1-A3 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W16 | OEM-2-U | MAXXECUSTREE-C1-K1 | 0.5 | no route | Injector 1 | — | |
| W17 | OEM-2-V | MAXXECUSTREE-C1-K2 | 0.5 | no route | Injector 2 | — | |
| W18 | OEM-2-Y | MAXXECUSTREE-C1-M1 | 0.5 | no route | Injector 3 | — | |
| W19 | OEM-2-Z | MAXXECUSTREE-C1-M2 | 0.5 | no route | Injector 4 | — | |
| W20 | OEM-1-E | MAXXECUSTREE-C1-B4 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W21 | OEM-2-I | MAXXECUSTREE-C1-C4 | 0.5 | no route | Tachometer output | — | |
| W22 | OEM-2-O | MAXXECUSTREE-C1-J3 | 0.5 | no route | Air flow meter (AFM) | — | |
| W23 | OEM-2-N | MAXXECUSTREE-C1-J4 | 0.5 | no route | O2 sensor | — | |
| W24 | OEM-2-Q | MAXXECUSTREE-C1-J1 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W25 | OEM-2-P | MAXXECUSTREE-C1-J2 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W26 | OEM-1-C | MAXXECUSTREE-C1-K3 | 0.5 | no route | Start signal | — | |
| W27 | OEM-1-N | MAXXECUSTREE-C1-K4 | 0.5 | no route | Wide-open throttle switch | — |
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 (2)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | OEM-2-I ↔ MAXXECUSTREE-C1-C4 | OEM-2-I "Tachometer output" [tacho_out] is wired to MAXXECUSTREE-C1-C4 "GPO 2" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up. |
| info | UNMAPPED | OEM | 4 optional OEM pins are not mapped: OEM-1-P Power steering pressure switch; OEM-1-Q A/C request; OEM-1-V Neutral/clutch switch; OEM-2-L Idle switch (TPS) |
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: MaxxECU MaxxECU STREET has no battery-constant input; not needed - OEM-1 P: Power steering pressure switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-1 Q: A/C request: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-1 V: Neutral/clutch switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-2 L: Idle switch (TPS): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET
Sources
| Reliability | Kind | Title | URL |
|---|---|---|---|
| 4 | vendor_doc | Link G4X MX5X install manual (NA 1.6/1.8) | https://linkecu.com/documentation/MX5X.pdf |
| 4 | vendor_doc | MaxxECU GEN1 pinout (MINI / STREET / SPORT / V1 / RACE / PRO) | http://www.maxxecu.com/webhelp/wirings-maxxecu_pinout.html |