MX-5 Miata NB1 1999-00 (BP-4W) → Speeduino Speeduino v0.4 (auto)
MX-5 Miata NB1 1999-00 (BP-4W) — Speeduino — Speeduino
⚠ 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
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | — | — | — | — | — | — | — |
| B | ECU power +14V (main relay) | — | — | — | — | — | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W25 | — | 0.5 | SPEEDUINO-A-32 | — | — | — |
| F | Brake switch | — | W34 | — | 0.5 | SPEEDUINO-A-18 | — | — | — |
| G | Power steering pressure switch | — | — | — | — | — | — | — | — |
| I | Condenser fan relay | — | W18 | — | 0.5 | SPEEDUINO-A-16 | — | — | — |
| O | Alternator control | — | W26 | — | 0.5 | SPEEDUINO-A-29 | — | — | — |
| P | A/C request | — | — | — | — | — | — | — | — |
| Q | Charge lamp | — | W27 | — | 0.5 | SPEEDUINO-A-30 | — | — | — |
| R | Cooling fan relay | — | W19 | — | 0.5 | SPEEDUINO-A-15 | — | — | — |
| S | A/C clutch relay | — | W20 | — | 0.5 | SPEEDUINO-A-36 | — | — | — |
| U | Front O2 heater | — | W22 | — | 0.5 | SPEEDUINO-A-37 | — | — | — |
| V | Neutral switch | — | — | — | — | — | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Fuel tank pressure | — | — | — | — | — | — | — | — |
| B | Intake air temperature (IAT) | — | W32 | — | 0.5 | SPEEDUINO-A-20 | — | — | — |
| C | Front O2 signal | — | W30 | — | 0.5 | SPEEDUINO-A-21 | — | — | — |
| D | Vehicle speed | — | W33 | — | 0.5 | SPEEDUINO-A-14 | — | — | — |
| E | Coolant temperature (ECT) | — | W31 | — | 0.5 | SPEEDUINO-A-19 | — | — | — |
| F | Knock sensor | — | — | — | — | — | — | — | — |
| H | Cam position (CMP) | — | W11 | — | 0.5 | SPEEDUINO-A-24 | — | — | — |
| I | +5V sensor supply | — | W9 | — | 0.5 | SPEEDUINO-A-13 | — | — | — |
| J | Crank position (CKP) | — | W10 | — | 0.5 | SPEEDUINO-A-25 | — | — | — |
| K | Tachometer output | — | W28 | — | 0.5 | SPEEDUINO-A-17 | — | — | — |
| L | Mass air flow (MAF) | — | — | — | — | — | — | — | — |
| M | EGR valve | — | — | — | — | — | — | — | — |
| N | EGR valve | — | — | — | — | — | — | — | — |
| O | EGR valve | — | — | — | — | — | — | — | — |
| P | EGR valve | — | — | — | — | — | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W1 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W2 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Throttle position (TPS) | — | W29 | — | 0.5 | SPEEDUINO-A-22 | — | — | — |
| F | Signal ground | — | W6 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W12 | — | 0.5 | SPEEDUINO-A-7 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W13 | — | 0.5 | SPEEDUINO-A-34 | — | — | — |
| I | Clutch switch | — | — | — | — | — | — | — | — |
| J | Rear O2 signal | — | — | — | — | — | — | — | — |
| K | Fuel level | — | — | — | — | — | — | — | — |
| L | Evap purge solenoid | — | — | — | — | — | — | — | — |
| M | ISC valve +14V feed | — | — | — | — | — | — | — | — |
| N | Fuel pump relay | — | W21 | — | 0.5 | SPEEDUINO-A-35 | — | — | — |
| O | ISC valve low side | — | W24 | — | 0.5 | SPEEDUINO-A-31 | — | — | — |
| Q | VICS solenoid (intake butterflies) | — | — | — | — | — | — | — | — |
| S | EGR boost sensor | — | — | — | — | — | — | — | — |
| T | EGR boost solenoid | — | — | — | — | — | — | — | — |
| U | Canister drain cut valve (CDCV) | — | — | — | — | — | — | — | — |
| V | Rear O2 heater | — | W23 | — | 0.5 | SPEEDUINO-A-38 | — | — | — |
| W | Injector 1 | — | W14 | — | 0.5 | SPEEDUINO-A-1 | — | — | — |
| X | Injector 2 | — | W15 | — | 0.5 | SPEEDUINO-A-2 | — | — | — |
| Y | Injector 3 | — | W16 | — | 0.5 | SPEEDUINO-A-3 | — | — | — |
| Z | Injector 4 | — | W17 | — | 0.5 | SPEEDUINO-A-5 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.5 | OEM-3-F | — | — | — |
| 1 | — | — | W7 | — | 0.5 | SPEEDUINO-A-12 | — | — | — |
| 1 | — | — | W8 | — | 0.5 | SPEEDUINO-A-23 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-3-C | — | — | — |
| 1 | — | — | W4 | — | 0.85 | SPEEDUINO-A-10 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | SPEEDUINO-A-9 | — | — | — |
SPEEDUINO-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W14 | — | 0.5 | OEM-3-W | — | — | — |
| 10 | Ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | MAP sensor (0-5V) | — | — | — | — | — | — | — | — |
| 12 | Ground | — | W7 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | 5V | — | W9 | — | 0.5 | OEM-2-I | — | — | — |
| 14 | Proto area 1 (flex fuel) | — | W33 | — | 0.5 | OEM-2-D | — | — | — |
| 15 | Proto area 2 (fan) | — | W19 | — | 0.5 | OEM-1-R | — | — | — |
| 16 | Proto area 3 (fuel pump) | — | W18 | — | 0.5 | OEM-1-I | — | — | — |
| 17 | Proto area 4 (tachometer) | — | W28 | — | 0.5 | OEM-2-K | — | — | — |
| 18 | Proto area 5 (clutch) | — | W34 | — | 0.5 | OEM-1-F | — | — | — |
| 19 | Coolant temp (CLT) | — | W31 | — | 0.5 | OEM-2-E | — | — | — |
| 2 | Injector 2 | — | W15 | — | 0.5 | OEM-3-X | — | — | — |
| 20 | Inlet air temp (IAT) | — | W32 | — | 0.5 | OEM-2-B | — | — | — |
| 21 | O2 sensor | — | W30 | — | 0.5 | OEM-2-C | — | — | — |
| 22 | TPS input | — | W29 | — | 0.5 | OEM-3-E | — | — | — |
| 23 | Ground | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | Cam input / VR2+ | — | W11 | — | 0.5 | OEM-2-H | — | — | — |
| 25 | Crank input / VR1+ | — | W10 | — | 0.5 | OEM-2-J | — | — | — |
| 26 | VR2- | — | — | — | — | — | — | — | — |
| 27 | VR1- | — | — | — | — | — | — | — | — |
| 28 | 5V | — | — | — | — | — | — | — | — |
| 29 | Idle stepper 2B | — | W26 | — | 0.5 | OEM-1-O | — | — | — |
| 3 | Injector 3 | — | W16 | — | 0.5 | OEM-3-Y | — | — | — |
| 30 | Idle stepper 2A | — | W27 | — | 0.5 | OEM-1-Q | — | — | — |
| 31 | Idle stepper 1A | — | W24 | — | 0.5 | OEM-3-O | — | — | — |
| 32 | Idle stepper 1B | — | W25 | — | 0.5 | OEM-1-E | — | — | — |
| 33 | Ignition 3 | — | — | — | — | — | — | — | — |
| 34 | Ignition 2 | — | W13 | — | 0.5 | OEM-3-H | — | — | — |
| 35 | Boost | — | W21 | — | 0.5 | OEM-3-N | — | — | — |
| 36 | Idle 2 (3-wire idle) | — | W20 | — | 0.5 | OEM-1-S | — | — | — |
| 37 | PWM idle | — | W22 | — | 0.5 | OEM-1-U | — | — | — |
| 38 | VVT | — | W23 | — | 0.5 | OEM-3-V | — | — | — |
| 5 | Injector 4 | — | W17 | — | 0.5 | OEM-3-Z | — | — | — |
| 7 | Ignition 1 | — | W12 | — | 0.5 | OEM-3-G | — | — | — |
| 8 | Ignition 4 | — | — | — | — | — | — | — | — |
| 9 | Ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
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 | — | — | — | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | SPEEDUINO-A-32 | Idle stepper 1B | hbridge_out | single_source | |
| OEM-1-F | Brake switch | digital_in | SPEEDUINO-A-18 | Proto area 5 (clutch) | digital_in | single_source | |
| OEM-1-G | Power steering pressure switch | digital_in | — | — | — | single_source | |
| OEM-1-I | Condenser fan relay | low_side_out | SPEEDUINO-A-16 | Proto area 3 (fuel pump) | low_side_out | single_source | |
| OEM-1-O | Alternator control | low_side_out | SPEEDUINO-A-29 | Idle stepper 2B | hbridge_out | single_source | |
| OEM-1-P | A/C request | digital_in | — | — | — | single_source | |
| OEM-1-Q | Charge lamp | low_side_out | SPEEDUINO-A-30 | Idle stepper 2A | hbridge_out | single_source | |
| OEM-1-R | Cooling fan relay | low_side_out | SPEEDUINO-A-15 | Proto area 2 (fan) | low_side_out | single_source | |
| OEM-1-S | A/C clutch relay | low_side_out | SPEEDUINO-A-36 | Idle 2 (3-wire idle) | low_side_out | single_source | |
| OEM-1-U | Front O2 heater | low_side_out | SPEEDUINO-A-37 | PWM idle | low_side_out | single_source | |
| OEM-1-V | Neutral switch | digital_in | — | — | — | single_source | |
| OEM-2-A | Fuel tank pressure | analog_in | — | — | — | single_source | |
| OEM-2-B | Intake air temperature (IAT) | temp_in | SPEEDUINO-A-20 | Inlet air temp (IAT) | temp_in | single_source | |
| OEM-2-C | Front O2 signal | lambda_nb_in | SPEEDUINO-A-21 | O2 sensor | lambda_nb_in | single_source | |
| OEM-2-D | Vehicle speed | digital_in | SPEEDUINO-A-14 | Proto area 1 (flex fuel) | digital_in | single_source | |
| OEM-2-E | Coolant temperature (ECT) | temp_in | SPEEDUINO-A-19 | Coolant temp (CLT) | temp_in | single_source | |
| OEM-2-F | Knock sensor | knock_in | — | — | — | single_source | |
| OEM-2-H | Cam position (CMP) | trigger_in | SPEEDUINO-A-24 | Cam input / VR2+ | trigger_in | single_source | |
| OEM-2-I | +5V sensor supply | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-2-J | Crank position (CKP) | trigger_in | SPEEDUINO-A-25 | Crank input / VR1+ | trigger_in | single_source | |
| OEM-2-K | Tachometer output | tacho_out | SPEEDUINO-A-17 | Proto area 4 (tachometer) | tacho_out | single_source | |
| OEM-2-L | Mass air flow (MAF) | analog_in | — | — | — | single_source | |
| OEM-2-M | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-N | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-O | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-P | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-3-A | Power ground | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-3-B | Power ground | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-3-C | Power ground | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-3-E | Throttle position (TPS) | analog_in | SPEEDUINO-A-22 | TPS input | analog_in | single_source | |
| OEM-3-F | Signal ground | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-3-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | SPEEDUINO-A-7 | Ignition 1 | ignition_out | single_source | |
| OEM-3-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | SPEEDUINO-A-34 | Ignition 2 | ignition_out | single_source | |
| OEM-3-I | Clutch switch | digital_in | — | — | — | single_source | |
| OEM-3-J | Rear O2 signal | lambda_nb_in | — | — | — | single_source | |
| OEM-3-K | Fuel level | analog_in | — | — | — | single_source | |
| OEM-3-L | Evap purge solenoid | low_side_out | — | — | — | single_source | |
| OEM-3-M | ISC valve +14V feed | power_in | — | — | — | single_source | |
| OEM-3-N | Fuel pump relay | low_side_out | SPEEDUINO-A-35 | Boost | low_side_out | single_source | |
| OEM-3-O | ISC valve low side | low_side_out | SPEEDUINO-A-31 | Idle stepper 1A | hbridge_out | single_source | |
| OEM-3-Q | VICS solenoid (intake butterflies) | low_side_out | — | — | — | single_source | |
| OEM-3-S | EGR boost sensor | analog_in | — | — | — | single_source | |
| OEM-3-T | EGR boost solenoid | low_side_out | — | — | — | single_source | |
| OEM-3-U | Canister drain cut valve (CDCV) | low_side_out | — | — | — | single_source | |
| OEM-3-V | Rear O2 heater | low_side_out | SPEEDUINO-A-38 | VVT | low_side_out | single_source | |
| OEM-3-W | Injector 1 | injector_out | SPEEDUINO-A-1 | Injector 1 | injector_out | single_source | |
| OEM-3-X | Injector 2 | injector_out | SPEEDUINO-A-2 | Injector 2 | injector_out | single_source | |
| OEM-3-Y | Injector 3 | injector_out | SPEEDUINO-A-3 | Injector 3 | injector_out | single_source | |
| OEM-3-Z | Injector 4 | injector_out | SPEEDUINO-A-5 | Injector 4 | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W2 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W3 | OEM-3-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W4 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | no route | Ground | — | |
| W5 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | no route | Ground | — | |
| W6 | OEM-3-F | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W7 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | no route | Ground | — | |
| W8 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | no route | Ground | — | |
| W9 | OEM-2-I | SPEEDUINO-A-13 | 0.5 | no route | +5V sensor supply | — | |
| W10 | OEM-2-J | SPEEDUINO-A-25 | 0.5 | no route | Crank position (CKP) | — | |
| W11 | OEM-2-H | SPEEDUINO-A-24 | 0.5 | no route | Cam position (CMP) | — | |
| W12 | OEM-3-G | SPEEDUINO-A-7 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W13 | OEM-3-H | SPEEDUINO-A-34 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W14 | OEM-3-W | SPEEDUINO-A-1 | 0.5 | no route | Injector 1 | — | |
| W15 | OEM-3-X | SPEEDUINO-A-2 | 0.5 | no route | Injector 2 | — | |
| W16 | OEM-3-Y | SPEEDUINO-A-3 | 0.5 | no route | Injector 3 | — | |
| W17 | OEM-3-Z | SPEEDUINO-A-5 | 0.5 | no route | Injector 4 | — | |
| W18 | OEM-1-I | SPEEDUINO-A-16 | 0.5 | no route | Condenser fan relay | — | |
| W19 | OEM-1-R | SPEEDUINO-A-15 | 0.5 | no route | Cooling fan relay | — | |
| W20 | OEM-1-S | SPEEDUINO-A-36 | 0.5 | no route | A/C clutch relay | — | |
| W21 | OEM-3-N | SPEEDUINO-A-35 | 0.5 | no route | Fuel pump relay | — | |
| W22 | OEM-1-U | SPEEDUINO-A-37 | 0.5 | no route | Front O2 heater | — | |
| W23 | OEM-3-V | SPEEDUINO-A-38 | 0.5 | no route | Rear O2 heater | — | |
| W24 | OEM-3-O | SPEEDUINO-A-31 | 0.5 | no route | ISC valve low side | — | |
| W25 | OEM-1-E | SPEEDUINO-A-32 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W26 | OEM-1-O | SPEEDUINO-A-29 | 0.5 | no route | Alternator control | — | |
| W27 | OEM-1-Q | SPEEDUINO-A-30 | 0.5 | no route | Charge lamp | — | |
| W28 | OEM-2-K | SPEEDUINO-A-17 | 0.5 | no route | Tachometer output | — | |
| W29 | OEM-3-E | SPEEDUINO-A-22 | 0.5 | no route | Throttle position (TPS) | — | |
| W30 | OEM-2-C | SPEEDUINO-A-21 | 0.5 | no route | Front O2 signal | — | |
| W31 | OEM-2-E | SPEEDUINO-A-19 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W32 | OEM-2-B | SPEEDUINO-A-20 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W33 | OEM-2-D | SPEEDUINO-A-14 | 0.5 | no route | Vehicle speed | — | |
| W34 | OEM-1-F | SPEEDUINO-A-18 | 0.5 | no route | Brake 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 (12)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-1-B | Required OEM function "ECU power +14V (main relay)" (power_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-2-L | Required OEM function "Mass air flow (MAF)" (analog_in) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-15 | SPEEDUINO-A-15 "Proto area 2 (fan)" drives OEM-1-R Cooling fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-16 | SPEEDUINO-A-16 "Proto area 3 (fuel pump)" drives OEM-1-I Condenser fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-31 | SPEEDUINO-A-31 "Idle stepper 1A" drives OEM-3-O ISC valve low side (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-35 | SPEEDUINO-A-35 "Boost" drives OEM-3-N Fuel pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-36 | SPEEDUINO-A-36 "Idle 2 (3-wire idle)" drives OEM-1-S A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-1-E ↔ SPEEDUINO-A-32 | OEM-1-E "Malfunction indicator lamp (MIL)" [low_side_out] is wired to SPEEDUINO-A-32 "Idle stepper 1B" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-1-O ↔ SPEEDUINO-A-29 | OEM-1-O "Alternator control" [low_side_out] is wired to SPEEDUINO-A-29 "Idle stepper 2B" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-1-Q ↔ SPEEDUINO-A-30 | OEM-1-Q "Charge lamp" [low_side_out] is wired to SPEEDUINO-A-30 "Idle stepper 2A" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-3-O ↔ SPEEDUINO-A-31 | OEM-3-O "ISC valve low side" [low_side_out] is wired to SPEEDUINO-A-31 "Idle stepper 1A" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | UNMAPPED | OEM | 18 optional OEM pins are not mapped: OEM-1-G Power steering pressure switch; OEM-1-P A/C request; OEM-1-V Neutral switch; OEM-2-A Fuel tank pressure; OEM-2-F Knock sensor; OEM-2-M EGR valve; OEM-2-N EGR valve; OEM-2-O EGR valve; OEM-2-P EGR valve; OEM-3-I Clutch switch; OEM-3-J Rear O2 signal; OEM-3-K Fuel level; OEM-3-L Evap purge solenoid; OEM-3-M ISC valve +14V feed; OEM-3-Q VICS solenoid (intake butterflies); OEM-3-S EGR boost sensor; OEM-3-T EGR boost solenoid; OEM-3-U Canister drain cut valve (CDCV) |
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. Open items: - Main-relay feed: no ecu_main_power pin on the stock or the new ECU - OEM-2 L: Mass air flow (MAF): no free maf/analog_0_5 on Speeduino Speeduino - OEM-1 B: ECU power +14V (main relay): no rule for class ecu_main_power; wire by hand Not wired: - OEM-1 A: Constant +12V: Speeduino Speeduino has no battery-constant input; not needed - OEM-2 F: Knock sensor: no free knock input on Speeduino Speeduino - OEM-2 M: EGR valve: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-2 N: EGR valve: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-2 O: EGR valve: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-2 P: EGR valve: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-3 L: Evap purge solenoid: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-3 Q: VICS solenoid (intake butterflies): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-3 T: EGR boost solenoid: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-3 U: Canister drain cut valve (CDCV): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-3 J: Rear O2 signal: no free o2_narrowband/analog_0_5 on Speeduino Speeduino - OEM-2 A: Fuel tank pressure: no free analog_0_5 on Speeduino Speeduino - OEM-3 K: Fuel level: no free analog_0_5 on Speeduino Speeduino - OEM-3 S: EGR boost sensor: no free analog_0_5 on Speeduino Speeduino - OEM-1 G: Power steering pressure switch: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-1 P: A/C request: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-1 V: Neutral switch: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-3 I: Clutch switch: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-3 M: ISC valve +14V feed: no rule for class switched_feed; wire by hand
Sources
| Reliability | Kind | Title | URL |
|---|---|---|---|
| 4 | vendor_doc | Link G4X MX5NB1X install manual (NB1 1999-00) | https://linkecu.com/documentation/MX5XNB1.pdf |
| 4 | vendor_doc | Speeduino Manual (08/04/25) — V0.4 board IDC40 pinout & features | https://speeduino.com/Speeduino_manual.pdf |