MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) → Haltech Elite 1500 HT-150900 (auto)
MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) — Haltech — Elite 1500
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-08
Before you start
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 36 wires · 7 connectors · 2 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-1-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | ELITE1500-A-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | ELITE1500-B-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-2-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-2-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-2-C | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-2-D | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | ELITE1500-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | ELITE1500-A-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-2-F | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | ELITE1500-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | ELITE1500-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | ELITE1500-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-2-K | ELITE1500-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-2-E | ELITE1500-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | ELITE1500-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-2-G | ELITE1500-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | ELITE1500-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-1-G | ELITE1500-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-1-H | ELITE1500-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-U | ELITE1500-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-2-V | ELITE1500-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-2-Y | ELITE1500-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-2-Z | ELITE1500-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-E | ELITE1500-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-2-I | ELITE1500-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-O | ELITE1500-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-N | ELITE1500-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-Q | ELITE1500-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-P | ELITE1500-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-1-C | ELITE1500-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-N | ELITE1500-B-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-P | ELITE1500-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-1-Q | ELITE1500-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-V | ELITE1500-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-2-L | ELITE1500-B-20 | 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 |
|---|---|---|---|---|---|
| 1 | ELITE1500-A-26 | ELITE1500-A-10 | open (OL) | +12 V supply must not touch power ground | |
| 2 | ELITE1500-A-26 | ELITE1500-B-14 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | ELITE1500-A-10 | ELITE1500-A-9 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | ELITE1500-A-26 | ELITE1500-A-9 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 5 | ELITE1500-B-14 | ELITE1500-A-9 | open (OL) | sensor ground must not touch 5 V sensor reference |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
ELITE1500-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | DPO 2 | — | W26 | — | 0.5 | OEM-2-I | — | — | — |
| 10 | Battery ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Battery ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | +8V DC | — | — | — | — | — | — | — | — |
| 13 | 12V ignition input | — | — | — | — | — | — | — | — |
| 14 | AVI 10 (TPS) | — | — | — | — | — | — | — | — |
| 15 | AVI 9 (MAP) | — | — | — | — | — | — | — | — |
| 16 | AVI 2 | — | W28 | — | 0.5 | OEM-2-N | — | — | — |
| 17 | AVI 3 | — | W30 | — | 0.5 | OEM-2-P | — | — | — |
| 18 | DPO 1 | — | W25 | — | 0.5 | OEM-1-E | — | — | — |
| 19 | INJ 1 | — | W21 | — | 0.5 | OEM-2-U | — | — | — |
| 2 | AVI 4 | — | W35 | — | 0.5 | OEM-1-V | — | — | — |
| 20 | INJ 2 | — | W22 | — | 0.5 | OEM-2-V | — | — | — |
| 21 | INJ 3 | — | W23 | — | 0.5 | OEM-2-Y | — | — | — |
| 22 | INJ 4 | — | W24 | — | 0.5 | OEM-2-Z | — | — | — |
| 23 | DPO 3 | — | — | — | — | — | — | — | — |
| 24 | DPO 5 (fuel pump trigger) | — | — | — | — | — | — | — | — |
| 25 | DPO 6 (ECR out) | — | — | — | — | — | — | — | — |
| 26 | ECU injector power input | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | IGN 1 | — | W19 | — | 0.5 | OEM-1-G | — | — | — |
| 31 | Stepper 1 P1 / DPO | — | — | — | — | — | — | — | — |
| 32 | Stepper 1 P2 / DPO | — | — | — | — | — | — | — | — |
| 33 | Stepper 1 P3 / DPO | — | — | — | — | — | — | — | — |
| 34 | Stepper 1 P4 / DPO | — | — | — | — | — | — | — | — |
| 4 | IGN 2 | — | W20 | — | 0.5 | OEM-1-H | — | — | — |
| 5 | IGN 3 | — | — | — | — | — | — | — | — |
| 6 | IGN 4 | — | — | — | — | — | — | — | — |
| 9 | +5V DC | — | W14 | — | 0.5 | OEM-2-K | — | — | — |
ELITE1500-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Crank (Trigger) (+) | — | W15 | — | 0.5 | OEM-2-E | — | — | — |
| 10 | SPI 3 | — | W33 | — | 0.5 | OEM-1-P | — | — | — |
| 11 | +13.8V ECU supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 12 | AVI 6 (O2 Input 1) | — | — | — | — | — | — | — | — |
| 13 | AVI 1 (O2 Input 2) | — | W27 | — | 0.5 | OEM-2-O | — | — | — |
| 14 | Signal ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | Signal ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Signal ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | DPO 4 | — | — | — | — | — | — | — | — |
| 2 | Cam (Home) (+) | — | W17 | — | 0.5 | OEM-2-G | — | — | — |
| 20 | AVI 5 | — | W36 | — | 0.5 | OEM-2-L | — | — | — |
| 21 | KNOCK 1 | — | — | — | — | — | — | — | — |
| 23 | CAN H | — | — | — | — | — | — | — | — |
| 24 | CAN L | — | — | — | — | — | — | — | — |
| 25 | DBW 1 / DPO | — | — | — | — | — | — | — | — |
| 26 | DBW 2 / DPO | — | — | — | — | — | — | — | — |
| 3 | AVI 7 (Air Temp) | — | — | — | — | — | — | — | — |
| 4 | AVI 8 (Coolant Temp) | — | W29 | — | 0.5 | OEM-2-Q | — | — | — |
| 5 | Crank (Trigger) (−) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 6 | Cam (Home) (−) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | SPI 4 | — | W34 | — | 0.5 | OEM-1-Q | — | — | — |
| 8 | SPI 1 | — | W31 | — | 0.5 | OEM-1-C | — | — | — |
| 9 | SPI 2 | — | W32 | — | 0.5 | OEM-1-N | — | — | — |
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 | — | W31 | — | 0.5 | ELITE1500-B-8 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W25 | — | 0.5 | ELITE1500-A-18 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W19 | — | 0.5 | ELITE1500-A-3 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W20 | — | 0.5 | ELITE1500-A-4 | — | — | — |
| N | Wide-open throttle switch | — | W32 | — | 0.5 | ELITE1500-B-9 | — | — | — |
| P | Power steering pressure switch | — | W33 | — | 0.5 | ELITE1500-B-10 | — | — | — |
| Q | A/C request | — | W34 | — | 0.5 | ELITE1500-B-7 | — | — | — |
| V | Neutral/clutch switch | — | W35 | — | 0.5 | ELITE1500-A-2 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| D | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Crank position (CAS NE) | — | W15 | — | 0.5 | ELITE1500-B-1 | — | — | — |
| F | AFM ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Cam position (CAS G) | — | W17 | — | 0.5 | ELITE1500-B-2 | — | — | — |
| I | Tachometer output | — | W26 | — | 0.5 | ELITE1500-A-1 | — | — | — |
| K | +5V sensor supply | — | W14 | — | 0.5 | ELITE1500-A-9 | — | — | — |
| L | Idle switch (TPS) | — | W36 | — | 0.5 | ELITE1500-B-20 | — | — | — |
| N | O2 sensor | — | W28 | — | 0.5 | ELITE1500-A-16 | — | — | — |
| O | Air flow meter (AFM) | — | W27 | — | 0.5 | ELITE1500-B-13 | — | — | — |
| P | Intake air temperature (IAT) | — | W30 | — | 0.5 | ELITE1500-A-17 | — | — | — |
| Q | Coolant temperature (ECT) | — | W29 | — | 0.5 | ELITE1500-B-4 | — | — | — |
| U | Injector 1 | — | W21 | — | 0.5 | ELITE1500-A-19 | — | — | — |
| V | Injector 2 | — | W22 | — | 0.5 | ELITE1500-A-20 | — | — | — |
| Y | Injector 3 | — | W23 | — | 0.5 | ELITE1500-A-21 | — | — | — |
| Z | Injector 4 | — | W24 | — | 0.5 | ELITE1500-A-22 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-2-F | — | — | — |
| 1 | — | — | W11 | — | 0.5 | ELITE1500-B-14 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | ELITE1500-B-15 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | ELITE1500-B-16 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | ELITE1500-B-5 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | ELITE1500-B-6 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | ELITE1500-A-26 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | ELITE1500-B-11 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-2-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-2-B | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-2-C | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-2-D | — | — | — |
| 1 | — | — | W8 | — | 0.85 | ELITE1500-A-10 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | ELITE1500-A-11 | — | — | — |
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 | ELITE1500-A-26 + ELITE1500-B-11 | ECU injector power input + +13.8V ECU supply | power_in | single_source | |
| OEM-1-C | Start signal | digital_in | ELITE1500-B-8 | SPI 1 | digital_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | ELITE1500-A-18 | DPO 1 | low_side_out | single_source | |
| OEM-1-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | ELITE1500-A-3 | IGN 1 | ignition_out | single_source | |
| OEM-1-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | ELITE1500-A-4 | IGN 2 | ignition_out | single_source | |
| OEM-1-N | Wide-open throttle switch | digital_in | ELITE1500-B-9 | SPI 2 | digital_in | single_source | |
| OEM-1-P | Power steering pressure switch | digital_in | ELITE1500-B-10 | SPI 3 | digital_in | single_source | |
| OEM-1-Q | A/C request | digital_in | ELITE1500-B-7 | SPI 4 | digital_in | single_source | |
| OEM-1-V | Neutral/clutch switch | digital_in | ELITE1500-A-2 | AVI 4 | analog_in | single_source | |
| OEM-2-A | Power ground | ground | ELITE1500-A-10 + ELITE1500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-2-B | Power ground | ground | ELITE1500-A-10 + ELITE1500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-2-C | Power ground | ground | ELITE1500-A-10 + ELITE1500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-2-D | Power ground | ground | ELITE1500-A-10 + ELITE1500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-2-E | Crank position (CAS NE) | trigger_in | ELITE1500-B-1 | Crank (Trigger) (+) | trigger_in | single_source | |
| OEM-2-F | AFM ground | sensor_ground | ELITE1500-B-14 + ELITE1500-B-15 + ELITE1500-B-16 + ELITE1500-B-5 + ELITE1500-B-6 | Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−) | sensor_ground + trigger_in | single_source | |
| OEM-2-G | Cam position (CAS G) | trigger_in | ELITE1500-B-2 | Cam (Home) (+) | trigger_in | single_source | |
| OEM-2-I | Tachometer output | tacho_out | ELITE1500-A-1 | DPO 2 | low_side_out | single_source | |
| OEM-2-K | +5V sensor supply | vref | ELITE1500-A-9 | +5V DC | vref | single_source | |
| OEM-2-L | Idle switch (TPS) | digital_in | ELITE1500-B-20 | AVI 5 | analog_in | single_source | |
| OEM-2-N | O2 sensor | lambda_nb_in | ELITE1500-A-16 | AVI 2 | analog_in | single_source | |
| OEM-2-O | Air flow meter (AFM) | analog_in | ELITE1500-B-13 | AVI 1 (O2 Input 2) | analog_in | single_source | |
| OEM-2-P | Intake air temperature (IAT) | temp_in | ELITE1500-A-17 | AVI 3 | analog_in | single_source | |
| OEM-2-Q | Coolant temperature (ECT) | temp_in | ELITE1500-B-4 | AVI 8 (Coolant Temp) | analog_in | single_source | |
| OEM-2-U | Injector 1 | injector_out | ELITE1500-A-19 | INJ 1 | injector_out | single_source | |
| OEM-2-V | Injector 2 | injector_out | ELITE1500-A-20 | INJ 2 | injector_out | single_source | |
| OEM-2-Y | Injector 3 | injector_out | ELITE1500-A-21 | INJ 3 | injector_out | single_source | |
| OEM-2-Z | Injector 4 | injector_out | ELITE1500-A-22 | 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 | ELITE1500-A-26 | 0.85 | no route | ECU injector power input | — | |
| W3 | SP-14V-1 | ELITE1500-B-11 | 0.85 | no route | +13.8V ECU supply | — | |
| W4 | OEM-2-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-2-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-2-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-2-D | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | SP-GND-1 | ELITE1500-A-10 | 0.85 | no route | Battery ground | — | |
| W9 | SP-GND-1 | ELITE1500-A-11 | 0.85 | no route | Battery ground | — | |
| W10 | OEM-2-F | SP-0V-1 | 0.5 | no route | AFM ground | — | |
| W11 | SP-0V-1 | ELITE1500-B-14 | 0.5 | no route | Signal ground | — | |
| W12 | SP-0V-1 | ELITE1500-B-15 | 0.5 | no route | Signal ground | — | |
| W13 | SP-0V-1 | ELITE1500-B-16 | 0.5 | no route | Signal ground | — | |
| W14 | OEM-2-K | ELITE1500-A-9 | 0.5 | no route | +5V sensor supply | — | |
| W15 | OEM-2-E | ELITE1500-B-1 | 0.5 | no route | Crank position (CAS NE) | — | |
| W16 | SP-0V-1 | ELITE1500-B-5 | 0.5 | no route | Crank (Trigger) (−) | — | |
| W17 | OEM-2-G | ELITE1500-B-2 | 0.5 | no route | Cam position (CAS G) | — | |
| W18 | SP-0V-1 | ELITE1500-B-6 | 0.5 | no route | Cam (Home) (−) | — | |
| W19 | OEM-1-G | ELITE1500-A-3 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W20 | OEM-1-H | ELITE1500-A-4 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W21 | OEM-2-U | ELITE1500-A-19 | 0.5 | no route | Injector 1 | — | |
| W22 | OEM-2-V | ELITE1500-A-20 | 0.5 | no route | Injector 2 | — | |
| W23 | OEM-2-Y | ELITE1500-A-21 | 0.5 | no route | Injector 3 | — | |
| W24 | OEM-2-Z | ELITE1500-A-22 | 0.5 | no route | Injector 4 | — | |
| W25 | OEM-1-E | ELITE1500-A-18 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W26 | OEM-2-I | ELITE1500-A-1 | 0.5 | no route | Tachometer output | — | |
| W27 | OEM-2-O | ELITE1500-B-13 | 0.5 | no route | Air flow meter (AFM) | — | |
| W28 | OEM-2-N | ELITE1500-A-16 | 0.5 | no route | O2 sensor | — | |
| W29 | OEM-2-Q | ELITE1500-B-4 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W30 | OEM-2-P | ELITE1500-A-17 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W31 | OEM-1-C | ELITE1500-B-8 | 0.5 | no route | Start signal | — | |
| W32 | OEM-1-N | ELITE1500-B-9 | 0.5 | no route | Wide-open throttle switch | — | |
| W33 | OEM-1-P | ELITE1500-B-10 | 0.5 | no route | Power steering pressure switch | — | |
| W34 | OEM-1-Q | ELITE1500-B-7 | 0.5 | no route | A/C request | — | |
| W35 | OEM-1-V | ELITE1500-A-2 | 0.5 | no route | Neutral/clutch switch | — | |
| W36 | OEM-2-L | ELITE1500-B-20 | 0.5 | no route | Idle switch (TPS) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 174515-6 | TE | AMP Multilock .040/.070 hybrid 22-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
| connector | 174516-6 | TE | AMP Multilock .040/.070 hybrid 26-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-1-V ↔ ELITE1500-A-2 | OEM-1-V "Neutral/clutch switch" [digital_in] is wired to ELITE1500-A-2 "AVI 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. |
| warn | NET_FAMILY | OEM-2-L ↔ ELITE1500-B-20 | OEM-2-L "Idle switch (TPS)" [digital_in] is wired to ELITE1500-B-20 "AVI 5" [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 | ELITE1500-B-15 ↔ ELITE1500-B-6 | ELITE1500-B-15 "Signal ground" [sensor_ground] is wired to ELITE1500-B-6 "Cam (Home) (−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-2-I ↔ ELITE1500-A-1 | OEM-2-I "Tachometer output" [tacho_out] is wired to ELITE1500-A-1 "DPO 2" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up. |
| info | NET_FAMILY | OEM-2-P ↔ ELITE1500-A-17 | OEM-2-P "Intake air temperature (IAT)" [temp_in] is wired to ELITE1500-A-17 "AVI 3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-Q ↔ ELITE1500-B-4 | OEM-2-Q "Coolant temperature (ECT)" [temp_in] is wired to ELITE1500-B-4 "AVI 8 (Coolant Temp)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
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 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-1 A: Constant +12V: Haltech Elite 1500 has no battery-constant input; not needed - ELITE1500-A 13: 12V ignition input: 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 | vendor_doc | Haltech Elite 1500 (HT-150900) — Features and Specifications | https://store.haltech.com/wp-admin/admin-ajax.php?action=ht_get_file&id=5d227c20506c252d340ade15&op=1 | — | 2026-10-05 | 6cce328f0dd2 |
| 4 | vendor_doc | Haltech Elite 1500 — 26-pin connector pinout | https://support.haltech.com/portal/en/kb/articles/main-connector-26-pin-elite1500 | archive | 2026-10-05 | 50cc758580c4 |
| 4 | vendor_doc | Haltech Elite 1500 — 34-pin main connector pinout | https://support.haltech.com/portal/en/kb/articles/main-connector-34-pin-elite1500 | archive | 2026-10-05 | 5294a445d73b |
| 4 | vendor_doc | Link G4X MX5X install manual (NA 1.6/1.8) | https://linkecu.com/documentation/MX5X.pdf | archive | 2026-10-05 | b7f730de9f6e |