← Back

Lexus SC400 1992-97 (1UZ-FE non-VVTi) → Haltech Elite 1500 HT-150900 (auto)

Lexus SC400 1992-97 (1UZ-FE non-VVTi) — Haltech — Elite 1500
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-12

Before you start

Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.

Statusproposal · not yet verified: nobody has reported building and running this harness
Open errorsnone
Size of the job52 wires · 9 connectors · 0 part lines
ToolsCrimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink
Order of work1. 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.

WireFromToGaugeColourCutLabelCrimp ACrimp BPin APin BContinuity
W1OEM-A-12SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-A-13SP-14V-10.85☐☐☐☐☐☐☐
W3SP-14V-1ELITE1500-A-260.85☐☐☐☐☐☐☐
W4SP-14V-1ELITE1500-B-110.85☐☐☐☐☐☐☐
W5OEM-A-22SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-D-13SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-D-26SP-GND-10.85☐☐☐☐☐☐☐
W8SP-GND-1ELITE1500-A-100.85☐☐☐☐☐☐☐
W9SP-GND-1ELITE1500-A-110.85☐☐☐☐☐☐☐
W10OEM-A-18SP-0V-10.5☐☐☐☐☐☐☐
W11OEM-C-15SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-C-16SP-0V-10.5☐☐☐☐☐☐☐
W13SP-0V-1ELITE1500-B-140.5☐☐☐☐☐☐☐
W14SP-0V-1ELITE1500-B-150.5☐☐☐☐☐☐☐
W15SP-0V-1ELITE1500-B-160.5☐☐☐☐☐☐☐
W16OEM-A-11ELITE1500-A-90.5☐☐☐☐☐☐☐
W17OEM-C-8ELITE1500-B-10.5☐☐☐☐☐☐☐
W18SP-0V-1ELITE1500-B-50.5☐☐☐☐☐☐☐
W19OEM-C-7ELITE1500-B-20.5☐☐☐☐☐☐☐
W20SP-0V-1ELITE1500-B-60.5☐☐☐☐☐☐☐
W21OEM-C-6ELITE1500-B-80.5☐☐☐☐☐☐☐
W22OEM-C-3ELITE1500-B-210.5☐☐☐☐☐☐☐
W23OEM-C-5ELITE1500-A-30.5☐☐☐☐☐☐☐
W24OEM-C-13ELITE1500-A-40.5☐☐☐☐☐☐☐
W25OEM-D-12ELITE1500-A-190.5☐☐☐☐☐☐☐
W26OEM-D-11ELITE1500-A-200.5☐☐☐☐☐☐☐
W27OEM-D-24ELITE1500-A-210.5☐☐☐☐☐☐☐
W28OEM-D-25ELITE1500-A-220.5☐☐☐☐☐☐☐
W29OEM-A-1ELITE1500-A-130.5☐☐☐☐☐☐☐
W30OEM-A-4ELITE1500-B-130.5☐☐☐☐☐☐☐
W31OEM-A-5ELITE1500-B-40.5☐☐☐☐☐☐☐
W32OEM-B-4ELITE1500-A-250.5☐☐☐☐☐☐☐
W33OEM-B-6ELITE1500-A-240.5☐☐☐☐☐☐☐
W34OEM-B-7ELITE1500-A-180.5☐☐☐☐☐☐☐
W35OEM-D-19ELITE1500-A-10.5☐☐☐☐☐☐☐
W36OEM-D-20ELITE1500-A-230.5☐☐☐☐☐☐☐
W37OEM-D-17ELITE1500-B-190.5☐☐☐☐☐☐☐
W38OEM-D-8ELITE1500-A-310.5☐☐☐☐☐☐☐
W39OEM-D-7ELITE1500-A-320.5☐☐☐☐☐☐☐
W40OEM-D-6ELITE1500-A-330.5☐☐☐☐☐☐☐
W41OEM-D-5ELITE1500-A-340.5☐☐☐☐☐☐☐
W42OEM-A-17ELITE1500-A-160.5☐☐☐☐☐☐☐
W43OEM-A-6ELITE1500-A-170.5☐☐☐☐☐☐☐
W44OEM-B-11ELITE1500-A-20.5☐☐☐☐☐☐☐
W45OEM-B-24ELITE1500-B-200.5☐☐☐☐☐☐☐
W46OEM-A-16ELITE1500-B-30.5☐☐☐☐☐☐☐
W47OEM-A-7ELITE1500-B-120.5☐☐☐☐☐☐☐
W48OEM-C-2ELITE1500-B-90.5☐☐☐☐☐☐☐
W49OEM-C-10ELITE1500-B-100.5☐☐☐☐☐☐☐
W50OEM-A-19ELITE1500-B-70.5☐☐☐☐☐☐☐
W51OEM-A-9ELITE1500-A-150.5☐☐☐☐☐☐☐
W52OEM-A-20ELITE1500-A-140.5☐☐☐☐☐☐☐

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 AProbe BExpectWhyReading
1ELITE1500-A-26ELITE1500-A-10open (OL)+12 V supply must not touch power ground
2ELITE1500-A-26ELITE1500-B-14open (OL)+12 V supply must not touch sensor ground
3ELITE1500-A-9ELITE1500-A-10open (OL)5 V sensor reference must not touch power ground
4ELITE1500-A-9ELITE1500-B-14open (OL)5 V sensor reference must not touch sensor ground
5ELITE1500-A-9ELITE1500-A-26open (OL)5 V sensor reference must not touch +12 V supply

If any reading doesn't match, stop and get help before powering up.

Revisions

RevLabelByDate
No revisions yet.

Schematic

ELITE1500-AELITE1500-BOEM-AOEM-BOEM-COEM-DSP-0VSP-14VSP-GND

Connectors

ELITE1500-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1DPO 2—W35—0.5OEM-D-19———
10Battery ground—W8—0.85SP-GND-1———
11Battery ground—W9—0.85SP-GND-1———
12+8V DC————————
1312V ignition input—W29—0.5OEM-A-1———
14AVI 10 (TPS)—W52—0.5OEM-A-20———
15AVI 9 (MAP)—W51—0.5OEM-A-9———
16AVI 2—W42—0.5OEM-A-17———
17AVI 3—W43—0.5OEM-A-6———
18DPO 1—W34—0.5OEM-B-7———
19INJ 1—W25—0.5OEM-D-12———
2AVI 4—W44—0.5OEM-B-11———
20INJ 2—W26—0.5OEM-D-11———
21INJ 3—W27—0.5OEM-D-24———
22INJ 4—W28—0.5OEM-D-25———
23DPO 3—W36—0.5OEM-D-20———
24DPO 5 (fuel pump trigger)—W33—0.5OEM-B-6———
25DPO 6 (ECR out)—W32—0.5OEM-B-4———
26ECU injector power input—W3—0.85SP-14V-1———
3IGN 1—W23—0.5OEM-C-5———
31Stepper 1 P1 / DPO—W38—0.5OEM-D-8———
32Stepper 1 P2 / DPO—W39—0.5OEM-D-7———
33Stepper 1 P3 / DPO—W40—0.5OEM-D-6———
34Stepper 1 P4 / DPO—W41—0.5OEM-D-5———
4IGN 2—W24—0.5OEM-C-13———
5IGN 3————————
6IGN 4————————
9+5V DC—W16—0.5OEM-A-11———

ELITE1500-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Crank (Trigger) (+)—W17—0.5OEM-C-8———
10SPI 3—W49—0.5OEM-C-10———
11+13.8V ECU supply—W4—0.85SP-14V-1———
12AVI 6 (O2 Input 1)—W47—0.5OEM-A-7———
13AVI 1 (O2 Input 2)—W30—0.5OEM-A-4———
14Signal ground—W13—0.5SP-0V-1———
15Signal ground—W14—0.5SP-0V-1———
16Signal ground—W15—0.5SP-0V-1———
19DPO 4—W37—0.5OEM-D-17———
2Cam (Home) (+)—W19—0.5OEM-C-7———
20AVI 5—W45—0.5OEM-B-24———
21KNOCK 1—W22—0.5OEM-C-3———
23CAN H————————
24CAN L————————
25DBW 1 / DPO————————
26DBW 2 / DPO————————
3AVI 7 (Air Temp)—W46—0.5OEM-A-16———
4AVI 8 (Coolant Temp)—W31—0.5OEM-A-5———
5Crank (Trigger) (−)—W18—0.5SP-0V-1———
6Cam (Home) (−)—W20—0.5SP-0V-1———
7SPI 4—W50—0.5OEM-A-19———
8SPI 1—W21—0.5OEM-C-6———
9SPI 2—W48—0.5OEM-C-2———

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition switch (IGSW)—W29—0.5ELITE1500-A-13———
11Sensor supply +5V (VC)—W16—0.5ELITE1500-A-9———
12EFI main relay (B+)—W1—0.85SP-14V-1———
13EFI main relay (B1+)—W2—0.85SP-14V-1———
14Neutral start switch (NSW)————————
16Intake air temperature (THA)—W46—0.5ELITE1500-B-3———
17O2 right front (OXR1)—W42—0.5ELITE1500-A-16———
18Sensor ground (E2)—W10—0.5SP-0V-1———
19Vehicle speed (SPD)—W50—0.5ELITE1500-B-7———
2Starter signal (STA)————————
20Diagnostic test 2 (TE2)—W52—0.5ELITE1500-A-14———
22Power ground (E1)—W5—0.85SP-GND-1———
4Throttle position (VTA1)—W30—0.5ELITE1500-B-13———
5Coolant temperature (THW)—W31—0.5ELITE1500-B-4———
6O2 left front (OXL1)—W43—0.5ELITE1500-A-17———
7EGR temperature sensor—W47—0.5ELITE1500-B-12———
8Knock/shield (KS)————————
9Diagnostic test 1 (TE1)—W51—0.5ELITE1500-A-15———

OEM-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11O2 right rear (OXR2)—W44—0.5ELITE1500-A-2———
19Stop light switch (BK)————————
20A/T kickdown switch (KD)————————
23A/C request (AC)————————
24O2 left rear (OXL2)—W45—0.5ELITE1500-B-20———
26Battery constant (BATT)————————
4EFI main relay control (MREL)—W32—0.5ELITE1500-A-25———
5Check-engine lamp (W)————————
6Fuel pump relay (FPR)—W33—0.5ELITE1500-A-24———
7A/C clutch relay (ACMG)—W34—0.5ELITE1500-A-18———
8Fuel pump control (FC)————————

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1TPS idle switch (IDL)————————
10Igniter 2 feedback (IGF2)—W49—0.5ELITE1500-B-10———
11Knock sensor 2 (KNK2)————————
12Check connector VF2————————
13Ignition 2 (IGT2)—W24—0.5ELITE1500-A-4———
15Cam sensor ground (G-)—W11—0.5SP-0V-1———
16Crank sensor - (NE-)—W12—0.5SP-0V-1———
2Igniter 1 feedback (IGF1)—W48—0.5ELITE1500-B-9———
3Knock sensor 1 (KNK1)—W22—0.5ELITE1500-B-21———
4Check connector VF1————————
5Ignition 1 (IGT1)—W23—0.5ELITE1500-A-3———
6Cam sensor 2 + (G2+)—W21—0.5ELITE1500-B-8———
7Cam sensor 1 + (G1+)—W19—0.5ELITE1500-B-2———
8Crank sensor + (NE+)—W17—0.5ELITE1500-B-1———

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11Injector 2&8 (#20)—W26—0.5ELITE1500-A-20———
12Injector 1&7 (#10)—W25—0.5ELITE1500-A-19———
13Power ground (E01)—W6—0.85SP-GND-1———
17Cold start injector 1 (STJ1)—W37—0.5ELITE1500-B-19———
19O2 heater 2 (HT2)—W35—0.5ELITE1500-A-1———
20O2 heater 1 (HT1)—W36—0.5ELITE1500-A-23———
21EGR solenoid————————
22Fuel pressure-up VSV (PR)————————
24Injector 3&5 (#40)—W27—0.5ELITE1500-A-21———
25Injector 4&6 (#30)—W28—0.5ELITE1500-A-22———
26Power ground (E02)—W7—0.85SP-GND-1———
4Cold start injector (STJ)————————
5ISC stepper coil 4 (ISC4)—W41—0.5ELITE1500-A-34———
6ISC stepper coil 3 (ISC3)—W40—0.5ELITE1500-A-33———
7ISC stepper coil 2 (ISC2)—W39—0.5ELITE1500-A-32———
8ISC stepper coil 1 (ISC1)—W38—0.5ELITE1500-A-31———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W10—0.5OEM-A-18———
1——W11—0.5OEM-C-15———
1——W12—0.5OEM-C-16———
1——W13—0.5ELITE1500-B-14———
1——W14—0.5ELITE1500-B-15———
1——W15—0.5ELITE1500-B-16———
1——W18—0.5ELITE1500-B-5———
1——W20—0.5ELITE1500-B-6———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-A-12———
1——W2—0.85OEM-A-13———
1——W3—0.85ELITE1500-A-26———
1——W4—0.85ELITE1500-B-11———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W5—0.85OEM-A-22———
1——W6—0.85OEM-D-13———
1——W7—0.85OEM-D-26———
1——W8—0.85ELITE1500-A-10———
1——W9—0.85ELITE1500-A-11———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1Ignition switch (IGSW)digital_inELITE1500-A-1312V ignition inputdigital_insingle_source
OEM-A-11Sensor supply +5V (VC)vrefELITE1500-A-9+5V DCvrefsingle_source
OEM-A-12EFI main relay (B+)power_inELITE1500-A-26 + ELITE1500-B-11ECU injector power input + +13.8V ECU supplypower_insingle_source
OEM-A-13EFI main relay (B1+)power_inELITE1500-A-26 + ELITE1500-B-11ECU injector power input + +13.8V ECU supplypower_insingle_source
OEM-A-14Neutral start switch (NSW)digital_in———single_source
OEM-A-16Intake air temperature (THA)temp_inELITE1500-B-3AVI 7 (Air Temp)analog_insingle_source
OEM-A-17O2 right front (OXR1)lambda_nb_inELITE1500-A-16AVI 2analog_insingle_source
OEM-A-18Sensor ground (E2)sensor_groundELITE1500-B-14 + ELITE1500-B-15 + ELITE1500-B-16 + ELITE1500-B-5 + ELITE1500-B-6Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−)sensor_ground + trigger_insingle_source
OEM-A-19Vehicle speed (SPD)digital_inELITE1500-B-7SPI 4digital_insingle_source
OEM-A-2Starter signal (STA)digital_in———single_source
OEM-A-20Diagnostic test 2 (TE2)digital_inELITE1500-A-14AVI 10 (TPS)analog_insingle_source
OEM-A-22Power ground (E1)groundELITE1500-A-10 + ELITE1500-A-11Battery ground + Battery groundgroundsingle_source
OEM-A-4Throttle position (VTA1)analog_inELITE1500-B-13AVI 1 (O2 Input 2)analog_insingle_source
OEM-A-5Coolant temperature (THW)temp_inELITE1500-B-4AVI 8 (Coolant Temp)analog_insingle_source
OEM-A-6O2 left front (OXL1)lambda_nb_inELITE1500-A-17AVI 3analog_insingle_source
OEM-A-7EGR temperature sensortemp_inELITE1500-B-12AVI 6 (O2 Input 1)analog_insingle_source
OEM-A-8Knock/shield (KS)knock_in———single_source
OEM-A-9Diagnostic test 1 (TE1)digital_inELITE1500-A-15AVI 9 (MAP)analog_insingle_source
OEM-B-11O2 right rear (OXR2)lambda_nb_inELITE1500-A-2AVI 4analog_insingle_source
OEM-B-19Stop light switch (BK)digital_in———single_source
OEM-B-20A/T kickdown switch (KD)digital_in———single_source
OEM-B-23A/C request (AC)digital_in———single_source
OEM-B-24O2 left rear (OXL2)lambda_nb_inELITE1500-B-20AVI 5analog_insingle_source
OEM-B-26Battery constant (BATT)power_in———single_source
OEM-B-4EFI main relay control (MREL)low_side_outELITE1500-A-25DPO 6 (ECR out)low_side_outsingle_source
OEM-B-5Check-engine lamp (W)low_side_out———single_source
OEM-B-6Fuel pump relay (FPR)low_side_outELITE1500-A-24DPO 5 (fuel pump trigger)low_side_outsingle_source
OEM-B-7A/C clutch relay (ACMG)low_side_outELITE1500-A-18DPO 1low_side_outsingle_source
OEM-B-8Fuel pump control (FC)low_side_out———single_source
OEM-C-1TPS idle switch (IDL)digital_in———single_source
OEM-C-10Igniter 2 feedback (IGF2)digital_inELITE1500-B-10SPI 3digital_insingle_source
OEM-C-11Knock sensor 2 (KNK2)knock_in———single_source
OEM-C-12Check connector VF2analog_out———single_source
OEM-C-13Ignition 2 (IGT2)ignition_outELITE1500-A-4IGN 2ignition_outsingle_source
OEM-C-15Cam sensor ground (G-)sensor_groundELITE1500-B-14 + ELITE1500-B-15 + ELITE1500-B-16 + ELITE1500-B-5 + ELITE1500-B-6Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−)sensor_ground + trigger_insingle_source
OEM-C-16Crank sensor - (NE-)sensor_groundELITE1500-B-14 + ELITE1500-B-15 + ELITE1500-B-16 + ELITE1500-B-5 + ELITE1500-B-6Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−)sensor_ground + trigger_insingle_source
OEM-C-2Igniter 1 feedback (IGF1)digital_inELITE1500-B-9SPI 2digital_insingle_source
OEM-C-3Knock sensor 1 (KNK1)knock_inELITE1500-B-21KNOCK 1knock_insingle_source
OEM-C-4Check connector VF1analog_out———single_source
OEM-C-5Ignition 1 (IGT1)ignition_outELITE1500-A-3IGN 1ignition_outsingle_source
OEM-C-6Cam sensor 2 + (G2+)trigger_inELITE1500-B-8SPI 1digital_insingle_source
OEM-C-7Cam sensor 1 + (G1+)trigger_inELITE1500-B-2Cam (Home) (+)trigger_insingle_source
OEM-C-8Crank sensor + (NE+)trigger_inELITE1500-B-1Crank (Trigger) (+)trigger_insingle_source
OEM-D-11Injector 2&8 (#20)injector_outELITE1500-A-20INJ 2injector_outsingle_source
OEM-D-12Injector 1&7 (#10)injector_outELITE1500-A-19INJ 1injector_outsingle_source
OEM-D-13Power ground (E01)groundELITE1500-A-10 + ELITE1500-A-11Battery ground + Battery groundgroundsingle_source
OEM-D-17Cold start injector 1 (STJ1)low_side_outELITE1500-B-19DPO 4low_side_outsingle_source
OEM-D-19O2 heater 2 (HT2)low_side_outELITE1500-A-1DPO 2low_side_outsingle_source
OEM-D-20O2 heater 1 (HT1)low_side_outELITE1500-A-23DPO 3low_side_outsingle_source
OEM-D-21EGR solenoidlow_side_out———single_source
OEM-D-22Fuel pressure-up VSV (PR)low_side_out———single_source
OEM-D-24Injector 3&5 (#40)injector_outELITE1500-A-21INJ 3injector_outsingle_source
OEM-D-25Injector 4&6 (#30)injector_outELITE1500-A-22INJ 4injector_outsingle_source
OEM-D-26Power ground (E02)groundELITE1500-A-10 + ELITE1500-A-11Battery ground + Battery groundgroundsingle_source
OEM-D-4Cold start injector (STJ)low_side_out———single_source
OEM-D-5ISC stepper coil 4 (ISC4)low_side_outELITE1500-A-34Stepper 1 P4 / DPOswitch_outsingle_source
OEM-D-6ISC stepper coil 3 (ISC3)low_side_outELITE1500-A-33Stepper 1 P3 / DPOswitch_outsingle_source
OEM-D-7ISC stepper coil 2 (ISC2)low_side_outELITE1500-A-32Stepper 1 P2 / DPOswitch_outsingle_source
OEM-D-8ISC stepper coil 1 (ISC1)low_side_outELITE1500-A-31Stepper 1 P1 / DPOswitch_outsingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-A-12SP-14V-10.85no routeEFI main relay (B+)—
W2OEM-A-13SP-14V-10.85no routeEFI main relay (B1+)—
W3SP-14V-1ELITE1500-A-260.85no routeECU injector power input—
W4SP-14V-1ELITE1500-B-110.85no route+13.8V ECU supply—
W5OEM-A-22SP-GND-10.85no routePower ground (E1)—
W6OEM-D-13SP-GND-10.85no routePower ground (E01)—
W7OEM-D-26SP-GND-10.85no routePower ground (E02)—
W8SP-GND-1ELITE1500-A-100.85no routeBattery ground—
W9SP-GND-1ELITE1500-A-110.85no routeBattery ground—
W10OEM-A-18SP-0V-10.5no routeSensor ground (E2)—
W11OEM-C-15SP-0V-10.5no routeCam sensor ground (G-)—
W12OEM-C-16SP-0V-10.5no routeCrank sensor - (NE-)—
W13SP-0V-1ELITE1500-B-140.5no routeSignal ground—
W14SP-0V-1ELITE1500-B-150.5no routeSignal ground—
W15SP-0V-1ELITE1500-B-160.5no routeSignal ground—
W16OEM-A-11ELITE1500-A-90.5no routeSensor supply +5V (VC)—
W17OEM-C-8ELITE1500-B-10.5no routeCrank sensor + (NE+)—
W18SP-0V-1ELITE1500-B-50.5no routeCrank (Trigger) (−)—
W19OEM-C-7ELITE1500-B-20.5no routeCam sensor 1 + (G1+)—
W20SP-0V-1ELITE1500-B-60.5no routeCam (Home) (−)—
W21OEM-C-6ELITE1500-B-80.5no routeCam sensor 2 + (G2+)—
W22OEM-C-3ELITE1500-B-210.5no routeKnock sensor 1 (KNK1)—
W23OEM-C-5ELITE1500-A-30.5no routeIgnition 1 (IGT1)—
W24OEM-C-13ELITE1500-A-40.5no routeIgnition 2 (IGT2)—
W25OEM-D-12ELITE1500-A-190.5no routeInjector 1&7 (#10)—
W26OEM-D-11ELITE1500-A-200.5no routeInjector 2&8 (#20)—
W27OEM-D-24ELITE1500-A-210.5no routeInjector 3&5 (#40)—
W28OEM-D-25ELITE1500-A-220.5no routeInjector 4&6 (#30)—
W29OEM-A-1ELITE1500-A-130.5no routeIgnition switch (IGSW)—
W30OEM-A-4ELITE1500-B-130.5no routeThrottle position (VTA1)—
W31OEM-A-5ELITE1500-B-40.5no routeCoolant temperature (THW)—
W32OEM-B-4ELITE1500-A-250.5no routeEFI main relay control (MREL)—
W33OEM-B-6ELITE1500-A-240.5no routeFuel pump relay (FPR)—
W34OEM-B-7ELITE1500-A-180.5no routeA/C clutch relay (ACMG)—
W35OEM-D-19ELITE1500-A-10.5no routeO2 heater 2 (HT2)—
W36OEM-D-20ELITE1500-A-230.5no routeO2 heater 1 (HT1)—
W37OEM-D-17ELITE1500-B-190.5no routeCold start injector 1 (STJ1)—
W38OEM-D-8ELITE1500-A-310.5no routeISC stepper coil 1 (ISC1)—
W39OEM-D-7ELITE1500-A-320.5no routeISC stepper coil 2 (ISC2)—
W40OEM-D-6ELITE1500-A-330.5no routeISC stepper coil 3 (ISC3)—
W41OEM-D-5ELITE1500-A-340.5no routeISC stepper coil 4 (ISC4)—
W42OEM-A-17ELITE1500-A-160.5no routeO2 right front (OXR1)—
W43OEM-A-6ELITE1500-A-170.5no routeO2 left front (OXL1)—
W44OEM-B-11ELITE1500-A-20.5no routeO2 right rear (OXR2)—
W45OEM-B-24ELITE1500-B-200.5no routeO2 left rear (OXL2)—
W46OEM-A-16ELITE1500-B-30.5no routeIntake air temperature (THA)—
W47OEM-A-7ELITE1500-B-120.5no routeEGR temperature sensor—
W48OEM-C-2ELITE1500-B-90.5no routeIgniter 1 feedback (IGF1)—
W49OEM-C-10ELITE1500-B-100.5no routeIgniter 2 feedback (IGF2)—
W50OEM-A-19ELITE1500-B-70.5no routeVehicle speed (SPD)—
W51OEM-A-9ELITE1500-A-150.5no routeDiagnostic test 1 (TE1)—
W52OEM-A-20ELITE1500-A-140.5no routeDiagnostic test 2 (TE2)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (12)

SeverityCodeSubjectMessage
warnNET_FAMILYOEM-A-20 ↔ ELITE1500-A-14OEM-A-20 "Diagnostic test 2 (TE2)" [digital_in] is wired to ELITE1500-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.
warnNET_FAMILYOEM-A-9 ↔ ELITE1500-A-15OEM-A-9 "Diagnostic test 1 (TE1)" [digital_in] is wired to ELITE1500-A-15 "AVI 9 (MAP)" [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.
warnNET_FAMILYOEM-C-6 ↔ ELITE1500-B-8OEM-C-6 "Cam sensor 2 + (G2+)" [trigger_in] is wired to ELITE1500-B-8 "SPI 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
infoNET_FAMILYOEM-A-16 ↔ ELITE1500-B-3OEM-A-16 "Intake air temperature (THA)" [temp_in] is wired to ELITE1500-B-3 "AVI 7 (Air Temp)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-A-5 ↔ ELITE1500-B-4OEM-A-5 "Coolant temperature (THW)" [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.
infoNET_FAMILYOEM-A-7 ↔ ELITE1500-B-12OEM-A-7 "EGR temperature sensor" [temp_in] is wired to ELITE1500-B-12 "AVI 6 (O2 Input 1)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-C-15 ↔ ELITE1500-B-6OEM-C-15 "Cam sensor ground (G-)" [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.
infoNET_FAMILYOEM-D-5 ↔ ELITE1500-A-34OEM-D-5 "ISC stepper coil 4 (ISC4)" [low_side_out] is wired to ELITE1500-A-34 "Stepper 1 P4 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-D-6 ↔ ELITE1500-A-33OEM-D-6 "ISC stepper coil 3 (ISC3)" [low_side_out] is wired to ELITE1500-A-33 "Stepper 1 P3 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-D-7 ↔ ELITE1500-A-32OEM-D-7 "ISC stepper coil 2 (ISC2)" [low_side_out] is wired to ELITE1500-A-32 "Stepper 1 P2 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-D-8 ↔ ELITE1500-A-31OEM-D-8 "ISC stepper coil 1 (ISC1)" [low_side_out] is wired to ELITE1500-A-31 "Stepper 1 P1 / DPO" [switch_out]. Configure this output as low side.
infoUNMAPPEDOEM15 optional OEM pins are not mapped: OEM-A-14 Neutral start switch (NSW); OEM-A-2 Starter signal (STA); OEM-A-8 Knock/shield (KS); OEM-B-19 Stop light switch (BK); OEM-B-20 A/T kickdown switch (KD); OEM-B-23 A/C request (AC); OEM-B-5 Check-engine lamp (W); OEM-B-8 Fuel pump control (FC); OEM-C-1 TPS idle switch (IDL); OEM-C-11 Knock sensor 2 (KNK2); OEM-C-12 Check connector VF2; OEM-C-4 Check connector VF1; OEM-D-21 EGR solenoid; OEM-D-22 Fuel pressure-up VSV (PR); OEM-D-4 Cold start injector (STJ)

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-B-26Battery-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 2026-10-11. Review every wire against both manuals before building. Not wired: - OEM-B 26: Battery constant (BATT): Haltech Elite 1500 has no battery-constant input; not needed - OEM-C 11: Knock sensor 2 (KNK2): no free knock input on Haltech Elite 1500 - OEM-A 8: Knock/shield (KS): no free knock input on Haltech Elite 1500 - OEM-B 5: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-B 8: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-D 21: EGR solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-D 22: Fuel pressure-up VSV (PR): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-D 4: Cold start injector (STJ): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-A 14: Neutral start switch (NSW): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-A 2: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-B 19: Stop light switch (BK): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-B 20: A/T kickdown switch (KD): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-B 23: A/C request (AC): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-C 1: TPS idle switch (IDL): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-C 4: Check connector VF1: no free analog_out on Haltech Elite 1500 - OEM-C 12: Check connector VF2: no free analog_out on Haltech Elite 1500

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docHaltech Elite 1500 (HT-150900) — Features and Specificationshttps://store.haltech.com/wp-admin/admin-ajax.php?action=ht_get_file&id=5d227c20506c252d340ade15&op=1—2026-10-056cce328f0dd2
4vendor_docHaltech Elite 1500 — 26-pin connector pinouthttps://support.haltech.com/portal/en/kb/articles/main-connector-26-pin-elite1500archive2026-10-0550cc758580c4
4vendor_docHaltech Elite 1500 — 34-pin main connector pinouthttps://support.haltech.com/portal/en/kb/articles/main-connector-34-pin-elite1500archive2026-10-055294a445d73b
2community_copyLextreme: Adaptronic install for 1UZ-FE (Lexus LS400/SC400) — 4-plug A/B/C/D ECU pin table (1992 LS400)https://www.lextreme.com/installation-of-an-adaptronic-ecu-for-a-lexus-ls400-sc400-1uzfe-engine/———