MX-5 Miata NB1 1999-00 (BP-4W) → Haltech Elite 2500 HT-151300 (auto)
MX-5 Miata NB1 1999-00 (BP-4W) — Haltech — Elite 2500
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-05
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
ELITE2500-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | DPO 2 | — | W28 | — | 0.5 | OEM-1-S | — | — | — |
| 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) | — | W55 | — | 0.5 | OEM-1-V | — | — | — |
| 15 | AVI 9 (MAP) | — | W50 | — | 0.5 | OEM-3-S | — | — | — |
| 16 | AVI 2 | — | W43 | — | 0.5 | OEM-3-E | — | — | — |
| 17 | AVI 3 | — | W44 | — | 0.5 | OEM-2-C | — | — | — |
| 18 | DPO 1 | — | W27 | — | 0.5 | OEM-1-R | — | — | — |
| 19 | INJ 1 | — | W22 | — | 0.5 | OEM-3-W | — | — | — |
| 2 | AVI 4 | — | W45 | — | 0.5 | OEM-3-J | — | — | — |
| 20 | INJ 2 | — | W23 | — | 0.5 | OEM-3-X | — | — | — |
| 21 | INJ 3 | — | W24 | — | 0.5 | OEM-3-Y | — | — | — |
| 22 | INJ 4 | — | W25 | — | 0.5 | OEM-3-Z | — | — | — |
| 23 | DPO 3 | — | W30 | — | 0.5 | OEM-1-U | — | — | — |
| 24 | DPO 5 (fuel pump trigger) | — | W29 | — | 0.5 | OEM-3-N | — | — | — |
| 25 | DPO 6 (ECR OUT) | — | W26 | — | 0.5 | OEM-1-I | — | — | — |
| 26 | ECU injector power input | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | INJ 5 | — | W36 | — | 0.5 | OEM-2-M | — | — | — |
| 28 | INJ 6 | — | W37 | — | 0.5 | OEM-2-N | — | — | — |
| 29 | INJ 7 | — | W38 | — | 0.5 | OEM-2-O | — | — | — |
| 3 | IGN 1 | — | W20 | — | 0.5 | OEM-3-G | — | — | — |
| 30 | INJ 8 | — | W39 | — | 0.5 | OEM-2-P | — | — | — |
| 31 | Stepper 1 P1 / DPO | — | W32 | — | 0.5 | OEM-3-O | — | — | — |
| 32 | Stepper 1 P2 / DPO | — | W33 | — | 0.5 | OEM-1-E | — | — | — |
| 33 | Stepper 1 P3 / DPO | — | W34 | — | 0.5 | OEM-1-O | — | — | — |
| 34 | Stepper 1 P4 / DPO | — | W35 | — | 0.5 | OEM-1-Q | — | — | — |
| 4 | IGN 2 | — | W21 | — | 0.5 | OEM-3-H | — | — | — |
| 5 | IGN 3 | — | — | — | — | — | — | — | — |
| 6 | IGN 4 | — | — | — | — | — | — | — | — |
| 7 | IGN 5 | — | — | — | — | — | — | — | — |
| 8 | IGN 6 | — | — | — | — | — | — | — | — |
| 9 | +5V DC | — | W14 | — | 0.5 | OEM-2-I | — | — | — |
ELITE2500-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Crank (Trigger) (+) | — | W15 | — | 0.5 | OEM-2-J | — | — | — |
| 10 | SPI 3 | — | W53 | — | 0.5 | OEM-1-G | — | — | — |
| 11 | +13.8V ECU supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 12 | AVI 6 (O2 Input 1) | — | W48 | — | 0.5 | OEM-2-A | — | — | — |
| 13 | AVI 1 (O2 Input 2) | — | W42 | — | 0.5 | OEM-2-L | — | — | — |
| 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 | — | — | — |
| 17 | IGN 7 | — | — | — | — | — | — | — | — |
| 18 | IGN 8 | — | — | — | — | — | — | — | — |
| 19 | DPO 4 | — | W31 | — | 0.5 | OEM-3-V | — | — | — |
| 2 | Cam (Home) (+) | — | W17 | — | 0.5 | OEM-2-H | — | — | — |
| 20 | AVI 5 | — | W47 | — | 0.5 | OEM-2-B | — | — | — |
| 21 | KNOCK 1 | — | W19 | — | 0.5 | OEM-2-F | — | — | — |
| 22 | KNOCK 2 | — | — | — | — | — | — | — | — |
| 23 | CAN H | — | — | — | — | — | — | — | — |
| 24 | CAN L | — | — | — | — | — | — | — | — |
| 25 | DBW 1 / DPO | — | W40 | — | 0.5 | OEM-3-L | — | — | — |
| 26 | DBW 2 / DPO | — | W41 | — | 0.5 | OEM-3-Q | — | — | — |
| 3 | AVI 7 (Air Temp) | — | W49 | — | 0.5 | OEM-3-K | — | — | — |
| 4 | AVI 8 (Coolant Temp) | — | W46 | — | 0.5 | OEM-2-E | — | — | — |
| 5 | Crank (Trigger) (−) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 6 | Cam (Home) (−) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | SPI 4 | — | W54 | — | 0.5 | OEM-1-P | — | — | — |
| 8 | SPI 1 | — | W51 | — | 0.5 | OEM-2-D | — | — | — |
| 9 | SPI 2 | — | W52 | — | 0.5 | OEM-1-F | — | — | — |
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 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W33 | — | 0.5 | ELITE2500-A-32 | — | — | — |
| F | Brake switch | — | W52 | — | 0.5 | ELITE2500-B-9 | — | — | — |
| G | Power steering pressure switch | — | W53 | — | 0.5 | ELITE2500-B-10 | — | — | — |
| I | Condenser fan relay | — | W26 | — | 0.5 | ELITE2500-A-25 | — | — | — |
| O | Alternator control | — | W34 | — | 0.5 | ELITE2500-A-33 | — | — | — |
| P | A/C request | — | W54 | — | 0.5 | ELITE2500-B-7 | — | — | — |
| Q | Charge lamp | — | W35 | — | 0.5 | ELITE2500-A-34 | — | — | — |
| R | Cooling fan relay | — | W27 | — | 0.5 | ELITE2500-A-18 | — | — | — |
| S | A/C clutch relay | — | W28 | — | 0.5 | ELITE2500-A-1 | — | — | — |
| U | Front O2 heater | — | W30 | — | 0.5 | ELITE2500-A-23 | — | — | — |
| V | Neutral switch | — | W55 | — | 0.5 | ELITE2500-A-14 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Fuel tank pressure | — | W48 | — | 0.5 | ELITE2500-B-12 | — | — | — |
| B | Intake air temperature (IAT) | — | W47 | — | 0.5 | ELITE2500-B-20 | — | — | — |
| C | Front O2 signal | — | W44 | — | 0.5 | ELITE2500-A-17 | — | — | — |
| D | Vehicle speed | — | W51 | — | 0.5 | ELITE2500-B-8 | — | — | — |
| E | Coolant temperature (ECT) | — | W46 | — | 0.5 | ELITE2500-B-4 | — | — | — |
| F | Knock sensor | — | W19 | — | 0.5 | ELITE2500-B-21 | — | — | — |
| H | Cam position (CMP) | — | W17 | — | 0.5 | ELITE2500-B-2 | — | — | — |
| I | +5V sensor supply | — | W14 | — | 0.5 | ELITE2500-A-9 | — | — | — |
| J | Crank position (CKP) | — | W15 | — | 0.5 | ELITE2500-B-1 | — | — | — |
| K | Tachometer output | — | — | — | — | — | — | — | — |
| L | Mass air flow (MAF) | — | W42 | — | 0.5 | ELITE2500-B-13 | — | — | — |
| M | EGR valve | — | W36 | — | 0.5 | ELITE2500-A-27 | — | — | — |
| N | EGR valve | — | W37 | — | 0.5 | ELITE2500-A-28 | — | — | — |
| O | EGR valve | — | W38 | — | 0.5 | ELITE2500-A-29 | — | — | — |
| P | EGR valve | — | W39 | — | 0.5 | ELITE2500-A-30 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Throttle position (TPS) | — | W43 | — | 0.5 | ELITE2500-A-16 | — | — | — |
| F | Signal ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W20 | — | 0.5 | ELITE2500-A-3 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W21 | — | 0.5 | ELITE2500-A-4 | — | — | — |
| I | Clutch switch | — | — | — | — | — | — | — | — |
| J | Rear O2 signal | — | W45 | — | 0.5 | ELITE2500-A-2 | — | — | — |
| K | Fuel level | — | W49 | — | 0.5 | ELITE2500-B-3 | — | — | — |
| L | Evap purge solenoid | — | W40 | — | 0.5 | ELITE2500-B-25 | — | — | — |
| M | ISC valve +14V feed | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| N | Fuel pump relay | — | W29 | — | 0.5 | ELITE2500-A-24 | — | — | — |
| O | ISC valve low side | — | W32 | — | 0.5 | ELITE2500-A-31 | — | — | — |
| Q | VICS solenoid (intake butterflies) | — | W41 | — | 0.5 | ELITE2500-B-26 | — | — | — |
| S | EGR boost sensor | — | W50 | — | 0.5 | ELITE2500-A-15 | — | — | — |
| T | EGR boost solenoid | — | — | — | — | — | — | — | — |
| U | Canister drain cut valve (CDCV) | — | — | — | — | — | — | — | — |
| V | Rear O2 heater | — | W31 | — | 0.5 | ELITE2500-B-19 | — | — | — |
| W | Injector 1 | — | W22 | — | 0.5 | ELITE2500-A-19 | — | — | — |
| X | Injector 2 | — | W23 | — | 0.5 | ELITE2500-A-20 | — | — | — |
| Y | Injector 3 | — | W24 | — | 0.5 | ELITE2500-A-21 | — | — | — |
| Z | Injector 4 | — | W25 | — | 0.5 | ELITE2500-A-22 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-3-F | — | — | — |
| 1 | — | — | W11 | — | 0.5 | ELITE2500-B-14 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | ELITE2500-B-15 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | ELITE2500-B-16 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | ELITE2500-B-5 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | ELITE2500-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 | OEM-3-M | — | — | — |
| 1 | — | — | W3 | — | 0.85 | ELITE2500-A-26 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | ELITE2500-B-11 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-3-C | — | — | — |
| 1 | — | — | W8 | — | 0.85 | ELITE2500-A-10 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | ELITE2500-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 | ELITE2500-A-26 + ELITE2500-B-11 | ECU injector power input + +13.8V ECU supply | power_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | ELITE2500-A-32 | Stepper 1 P2 / DPO | switch_out | single_source | |
| OEM-1-F | Brake switch | digital_in | ELITE2500-B-9 | SPI 2 | digital_in | single_source | |
| OEM-1-G | Power steering pressure switch | digital_in | ELITE2500-B-10 | SPI 3 | digital_in | single_source | |
| OEM-1-I | Condenser fan relay | low_side_out | ELITE2500-A-25 | DPO 6 (ECR OUT) | low_side_out | single_source | |
| OEM-1-O | Alternator control | low_side_out | ELITE2500-A-33 | Stepper 1 P3 / DPO | switch_out | single_source | |
| OEM-1-P | A/C request | digital_in | ELITE2500-B-7 | SPI 4 | digital_in | single_source | |
| OEM-1-Q | Charge lamp | low_side_out | ELITE2500-A-34 | Stepper 1 P4 / DPO | switch_out | single_source | |
| OEM-1-R | Cooling fan relay | low_side_out | ELITE2500-A-18 | DPO 1 | low_side_out | single_source | |
| OEM-1-S | A/C clutch relay | low_side_out | ELITE2500-A-1 | DPO 2 | low_side_out | single_source | |
| OEM-1-U | Front O2 heater | low_side_out | ELITE2500-A-23 | DPO 3 | low_side_out | single_source | |
| OEM-1-V | Neutral switch | digital_in | ELITE2500-A-14 | AVI 10 (TPS) | analog_in | single_source | |
| OEM-2-A | Fuel tank pressure | analog_in | ELITE2500-B-12 | AVI 6 (O2 Input 1) | analog_in | single_source | |
| OEM-2-B | Intake air temperature (IAT) | temp_in | ELITE2500-B-20 | AVI 5 | analog_in | single_source | |
| OEM-2-C | Front O2 signal | lambda_nb_in | ELITE2500-A-17 | AVI 3 | analog_in | single_source | |
| OEM-2-D | Vehicle speed | digital_in | ELITE2500-B-8 | SPI 1 | digital_in | single_source | |
| OEM-2-E | Coolant temperature (ECT) | temp_in | ELITE2500-B-4 | AVI 8 (Coolant Temp) | analog_in | single_source | |
| OEM-2-F | Knock sensor | knock_in | ELITE2500-B-21 | KNOCK 1 | knock_in | single_source | |
| OEM-2-H | Cam position (CMP) | trigger_in | ELITE2500-B-2 | Cam (Home) (+) | trigger_in | single_source | |
| OEM-2-I | +5V sensor supply | vref | ELITE2500-A-9 | +5V DC | vref | single_source | |
| OEM-2-J | Crank position (CKP) | trigger_in | ELITE2500-B-1 | Crank (Trigger) (+) | trigger_in | single_source | |
| OEM-2-K | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-2-L | Mass air flow (MAF) | analog_in | ELITE2500-B-13 | AVI 1 (O2 Input 2) | analog_in | single_source | |
| OEM-2-M | EGR valve | low_side_out | ELITE2500-A-27 | INJ 5 | injector_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | ELITE2500-A-28 | INJ 6 | injector_out | single_source | |
| OEM-2-O | EGR valve | low_side_out | ELITE2500-A-29 | INJ 7 | injector_out | single_source | |
| OEM-2-P | EGR valve | low_side_out | ELITE2500-A-30 | INJ 8 | injector_out | single_source | |
| OEM-3-A | Power ground | ground | ELITE2500-A-10 + ELITE2500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-3-B | Power ground | ground | ELITE2500-A-10 + ELITE2500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-3-C | Power ground | ground | ELITE2500-A-10 + ELITE2500-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-3-E | Throttle position (TPS) | analog_in | ELITE2500-A-16 | AVI 2 | analog_in | single_source | |
| OEM-3-F | Signal ground | sensor_ground | ELITE2500-B-14 + ELITE2500-B-15 + ELITE2500-B-16 + ELITE2500-B-5 + ELITE2500-B-6 | Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−) | sensor_ground + trigger_in | single_source | |
| OEM-3-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | ELITE2500-A-3 | IGN 1 | ignition_out | single_source | |
| OEM-3-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | ELITE2500-A-4 | IGN 2 | ignition_out | single_source | |
| OEM-3-I | Clutch switch | digital_in | — | — | — | single_source | |
| OEM-3-J | Rear O2 signal | lambda_nb_in | ELITE2500-A-2 | AVI 4 | analog_in | single_source | |
| OEM-3-K | Fuel level | analog_in | ELITE2500-B-3 | AVI 7 (Air Temp) | analog_in | single_source | |
| OEM-3-L | Evap purge solenoid | low_side_out | ELITE2500-B-25 | DBW 1 / DPO | hbridge_out | single_source | |
| OEM-3-M | ISC valve +14V feed | power_in | ELITE2500-A-26 + ELITE2500-B-11 | ECU injector power input + +13.8V ECU supply | power_in | single_source | |
| OEM-3-N | Fuel pump relay | low_side_out | ELITE2500-A-24 | DPO 5 (fuel pump trigger) | low_side_out | single_source | |
| OEM-3-O | ISC valve low side | low_side_out | ELITE2500-A-31 | Stepper 1 P1 / DPO | switch_out | single_source | |
| OEM-3-Q | VICS solenoid (intake butterflies) | low_side_out | ELITE2500-B-26 | DBW 2 / DPO | hbridge_out | single_source | |
| OEM-3-S | EGR boost sensor | analog_in | ELITE2500-A-15 | AVI 9 (MAP) | 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 | ELITE2500-B-19 | DPO 4 | low_side_out | single_source | |
| OEM-3-W | Injector 1 | injector_out | ELITE2500-A-19 | INJ 1 | injector_out | single_source | |
| OEM-3-X | Injector 2 | injector_out | ELITE2500-A-20 | INJ 2 | injector_out | single_source | |
| OEM-3-Y | Injector 3 | injector_out | ELITE2500-A-21 | INJ 3 | injector_out | single_source | |
| OEM-3-Z | Injector 4 | injector_out | ELITE2500-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 | OEM-3-M | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W3 | SP-14V-1 | ELITE2500-A-26 | 0.85 | no route | ECU injector power input | — | |
| W4 | SP-14V-1 | ELITE2500-B-11 | 0.85 | no route | +13.8V ECU supply | — | |
| W5 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-3-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | SP-GND-1 | ELITE2500-A-10 | 0.85 | no route | Battery ground | — | |
| W9 | SP-GND-1 | ELITE2500-A-11 | 0.85 | no route | Battery ground | — | |
| W10 | OEM-3-F | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W11 | SP-0V-1 | ELITE2500-B-14 | 0.5 | no route | Signal ground | — | |
| W12 | SP-0V-1 | ELITE2500-B-15 | 0.5 | no route | Signal ground | — | |
| W13 | SP-0V-1 | ELITE2500-B-16 | 0.5 | no route | Signal ground | — | |
| W14 | OEM-2-I | ELITE2500-A-9 | 0.5 | no route | +5V sensor supply | — | |
| W15 | OEM-2-J | ELITE2500-B-1 | 0.5 | no route | Crank position (CKP) | — | |
| W16 | SP-0V-1 | ELITE2500-B-5 | 0.5 | no route | Crank (Trigger) (−) | — | |
| W17 | OEM-2-H | ELITE2500-B-2 | 0.5 | no route | Cam position (CMP) | — | |
| W18 | SP-0V-1 | ELITE2500-B-6 | 0.5 | no route | Cam (Home) (−) | — | |
| W19 | OEM-2-F | ELITE2500-B-21 | 0.5 | no route | Knock sensor | — | |
| W20 | OEM-3-G | ELITE2500-A-3 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W21 | OEM-3-H | ELITE2500-A-4 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W22 | OEM-3-W | ELITE2500-A-19 | 0.5 | no route | Injector 1 | — | |
| W23 | OEM-3-X | ELITE2500-A-20 | 0.5 | no route | Injector 2 | — | |
| W24 | OEM-3-Y | ELITE2500-A-21 | 0.5 | no route | Injector 3 | — | |
| W25 | OEM-3-Z | ELITE2500-A-22 | 0.5 | no route | Injector 4 | — | |
| W26 | OEM-1-I | ELITE2500-A-25 | 0.5 | no route | Condenser fan relay | — | |
| W27 | OEM-1-R | ELITE2500-A-18 | 0.5 | no route | Cooling fan relay | — | |
| W28 | OEM-1-S | ELITE2500-A-1 | 0.5 | no route | A/C clutch relay | — | |
| W29 | OEM-3-N | ELITE2500-A-24 | 0.5 | no route | Fuel pump relay | — | |
| W30 | OEM-1-U | ELITE2500-A-23 | 0.5 | no route | Front O2 heater | — | |
| W31 | OEM-3-V | ELITE2500-B-19 | 0.5 | no route | Rear O2 heater | — | |
| W32 | OEM-3-O | ELITE2500-A-31 | 0.5 | no route | ISC valve low side | — | |
| W33 | OEM-1-E | ELITE2500-A-32 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W34 | OEM-1-O | ELITE2500-A-33 | 0.5 | no route | Alternator control | — | |
| W35 | OEM-1-Q | ELITE2500-A-34 | 0.5 | no route | Charge lamp | — | |
| W36 | OEM-2-M | ELITE2500-A-27 | 0.5 | no route | EGR valve | — | |
| W37 | OEM-2-N | ELITE2500-A-28 | 0.5 | no route | EGR valve | — | |
| W38 | OEM-2-O | ELITE2500-A-29 | 0.5 | no route | EGR valve | — | |
| W39 | OEM-2-P | ELITE2500-A-30 | 0.5 | no route | EGR valve | — | |
| W40 | OEM-3-L | ELITE2500-B-25 | 0.5 | no route | Evap purge solenoid | — | |
| W41 | OEM-3-Q | ELITE2500-B-26 | 0.5 | no route | VICS solenoid (intake butterflies) | — | |
| W42 | OEM-2-L | ELITE2500-B-13 | 0.5 | no route | Mass air flow (MAF) | — | |
| W43 | OEM-3-E | ELITE2500-A-16 | 0.5 | no route | Throttle position (TPS) | — | |
| W44 | OEM-2-C | ELITE2500-A-17 | 0.5 | no route | Front O2 signal | — | |
| W45 | OEM-3-J | ELITE2500-A-2 | 0.5 | no route | Rear O2 signal | — | |
| W46 | OEM-2-E | ELITE2500-B-4 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W47 | OEM-2-B | ELITE2500-B-20 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W48 | OEM-2-A | ELITE2500-B-12 | 0.5 | no route | Fuel tank pressure | — | |
| W49 | OEM-3-K | ELITE2500-B-3 | 0.5 | no route | Fuel level | — | |
| W50 | OEM-3-S | ELITE2500-A-15 | 0.5 | no route | EGR boost sensor | — | |
| W51 | OEM-2-D | ELITE2500-B-8 | 0.5 | no route | Vehicle speed | — | |
| W52 | OEM-1-F | ELITE2500-B-9 | 0.5 | no route | Brake switch | — | |
| W53 | OEM-1-G | ELITE2500-B-10 | 0.5 | no route | Power steering pressure switch | — | |
| W54 | OEM-1-P | ELITE2500-B-7 | 0.5 | no route | A/C request | — | |
| W55 | OEM-1-V | ELITE2500-A-14 | 0.5 | no route | Neutral 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 (15)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-1-V ↔ ELITE2500-A-14 | OEM-1-V "Neutral switch" [digital_in] is wired to ELITE2500-A-14 "AVI 10 (TPS)" [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-3-L ↔ ELITE2500-B-25 | OEM-3-L "Evap purge solenoid" [low_side_out] is wired to ELITE2500-B-25 "DBW 1 / DPO" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-3-Q ↔ ELITE2500-B-26 | OEM-3-Q "VICS solenoid (intake butterflies)" [low_side_out] is wired to ELITE2500-B-26 "DBW 2 / DPO" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | NET_FAMILY | ELITE2500-B-14 ↔ ELITE2500-B-5 | ELITE2500-B-14 "Signal ground" [sensor_ground] is wired to ELITE2500-B-5 "Crank (Trigger) (−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-1-E ↔ ELITE2500-A-32 | OEM-1-E "Malfunction indicator lamp (MIL)" [low_side_out] is wired to ELITE2500-A-32 "Stepper 1 P2 / DPO" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-1-O ↔ ELITE2500-A-33 | OEM-1-O "Alternator control" [low_side_out] is wired to ELITE2500-A-33 "Stepper 1 P3 / DPO" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-1-Q ↔ ELITE2500-A-34 | OEM-1-Q "Charge lamp" [low_side_out] is wired to ELITE2500-A-34 "Stepper 1 P4 / DPO" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-B ↔ ELITE2500-B-20 | OEM-2-B "Intake air temperature (IAT)" [temp_in] is wired to ELITE2500-B-20 "AVI 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-E ↔ ELITE2500-B-4 | OEM-2-E "Coolant temperature (ECT)" [temp_in] is wired to ELITE2500-B-4 "AVI 8 (Coolant Temp)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-M ↔ ELITE2500-A-27 | OEM-2-M "EGR valve" [low_side_out] is wired to ELITE2500-A-27 "INJ 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-N ↔ ELITE2500-A-28 | OEM-2-N "EGR valve" [low_side_out] is wired to ELITE2500-A-28 "INJ 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-O ↔ ELITE2500-A-29 | OEM-2-O "EGR valve" [low_side_out] is wired to ELITE2500-A-29 "INJ 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-P ↔ ELITE2500-A-30 | OEM-2-P "EGR valve" [low_side_out] is wired to ELITE2500-A-30 "INJ 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-O ↔ ELITE2500-A-31 | OEM-3-O "ISC valve low side" [low_side_out] is wired to ELITE2500-A-31 "Stepper 1 P1 / DPO" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 4 optional OEM pins are not mapped: OEM-2-K Tachometer output; OEM-3-I Clutch switch; 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. Not wired: - OEM-1 A: Constant +12V: Haltech Elite 2500 has no battery-constant input; not needed - OEM-3 T: EGR boost solenoid: no free low_side/ls_hs/injector/hbridge on Haltech Elite 2500 - OEM-3 U: Canister drain cut valve (CDCV): no free low_side/ls_hs/injector/hbridge on Haltech Elite 2500 - OEM-2 K: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on Haltech Elite 2500 - OEM-3 I: Clutch switch: no free switch_in/frequency_in/analog_0_5 on Haltech Elite 2500 - ELITE2500-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 |
|---|---|---|---|
| 4 | datasheet | Haltech Elite 2500 (HT-151300) spec sheet | https://joeblospeedshop.com/wp-content/uploads/2023/11/HT-151300_SPEC-SHEET-2500-ELITE.pdf |
| 4 | vendor_doc | Haltech Elite 2500 — 26-pin connector pinout | https://support.haltech.com/portal/en/kb/articles/main-connector-26-pin-elite2500 |
| 4 | vendor_doc | Haltech Elite 2500 — 34-pin main connector pinout | https://support.haltech.com/portal/en/kb/articles/main-connector-34-pin-elite2500 |
| 4 | vendor_doc | Link G4X MX5NB1X install manual (NB1 1999-00) | https://linkecu.com/documentation/MX5XNB1.pdf |