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Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i → Haltech Elite 1500 HT-150900 (auto)

Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i — Haltech — Elite 1500
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-11

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.

Statusdraft · not yet verified: nobody has reported building and running this harness
Open errors4: read the Findings page before cutting any wire
Size of the job56 wires · 11 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-E2-13SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-E3-16SP-14V-10.85☐☐☐☐☐☐☐
W3OEM-E3-7SP-14V-10.85☐☐☐☐☐☐☐
W4OEM-E3-8SP-14V-10.85☐☐☐☐☐☐☐
W5SP-14V-1ELITE1500-A-260.85☐☐☐☐☐☐☐
W6SP-14V-1ELITE1500-B-110.85☐☐☐☐☐☐☐
W7OEM-E6-17SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-E7-21SP-GND-10.85☐☐☐☐☐☐☐
W9SP-GND-1ELITE1500-A-100.85☐☐☐☐☐☐☐
W10SP-GND-1ELITE1500-A-110.85☐☐☐☐☐☐☐
W11OEM-E6-18SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-E6-19SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-E7-22SP-0V-10.5☐☐☐☐☐☐☐
W14SP-0V-1ELITE1500-B-140.5☐☐☐☐☐☐☐
W15SP-0V-1ELITE1500-B-150.5☐☐☐☐☐☐☐
W16SP-0V-1ELITE1500-B-160.5☐☐☐☐☐☐☐
W17OEM-E6-2ELITE1500-A-90.5☐☐☐☐☐☐☐
W18OEM-E7-23ELITE1500-B-10.5☐☐☐☐☐☐☐
W19SP-0V-1ELITE1500-B-50.5☐☐☐☐☐☐☐
W20OEM-E7-10ELITE1500-B-20.5☐☐☐☐☐☐☐
W21SP-0V-1ELITE1500-B-60.5☐☐☐☐☐☐☐
W22OEM-E7-28ELITE1500-B-210.5☐☐☐☐☐☐☐
W23OEM-E7-11ELITE1500-A-30.5☐☐☐☐☐☐☐
W24OEM-E7-12ELITE1500-A-40.5☐☐☐☐☐☐☐
W25OEM-E7-13ELITE1500-A-50.5☐☐☐☐☐☐☐
W26OEM-E6-5ELITE1500-A-190.5☐☐☐☐☐☐☐
W27OEM-E6-6ELITE1500-A-200.5☐☐☐☐☐☐☐
W28OEM-E7-1ELITE1500-A-210.5☐☐☐☐☐☐☐
W29OEM-E7-2ELITE1500-A-220.5☐☐☐☐☐☐☐
W30OEM-E7-3ELITE1500-A-190.5☐☐☐☐☐☐☐
W31OEM-E7-4ELITE1500-A-200.5☐☐☐☐☐☐☐
W32OEM-E3-9ELITE1500-A-130.5☐☐☐☐☐☐☐
W33OEM-E7-17ELITE1500-A-180.5☐☐☐☐☐☐☐
W34OEM-E7-18ELITE1500-A-10.5☐☐☐☐☐☐☐
W35OEM-E7-19ELITE1500-A-230.5☐☐☐☐☐☐☐
W36OEM-E7-20ELITE1500-B-190.5☐☐☐☐☐☐☐
W37OEM-E6-15ELITE1500-B-130.5☐☐☐☐☐☐☐
W38OEM-E6-23ELITE1500-A-160.5☐☐☐☐☐☐☐
W39OEM-E6-16ELITE1500-A-170.5☐☐☐☐☐☐☐
W40OEM-E6-24ELITE1500-A-20.5☐☐☐☐☐☐☐
W41OEM-E6-14ELITE1500-B-40.5☐☐☐☐☐☐☐
W42OEM-E3-10ELITE1500-A-250.5☐☐☐☐☐☐☐
W43OEM-E3-4ELITE1500-A-240.5☐☐☐☐☐☐☐
W44OEM-E4-13ELITE1500-A-310.5☐☐☐☐☐☐☐
W45OEM-E2-25ELITE1500-A-320.5☐☐☐☐☐☐☐
W46OEM-E2-26ELITE1500-A-330.5☐☐☐☐☐☐☐
W47OEM-E6-3ELITE1500-A-340.5☐☐☐☐☐☐☐
W48OEM-E6-10ELITE1500-B-200.5☐☐☐☐☐☐☐
W49OEM-E2-24ELITE1500-B-120.5☐☐☐☐☐☐☐
W50OEM-E4-8ELITE1500-B-30.5☐☐☐☐☐☐☐
W51OEM-E6-11ELITE1500-A-150.5☐☐☐☐☐☐☐
W52OEM-E6-12ELITE1500-A-140.5☐☐☐☐☐☐☐
W53OEM-E5-11ELITE1500-B-80.5☐☐☐☐☐☐☐
W54OEM-E5-5ELITE1500-B-90.5☐☐☐☐☐☐☐
W55OEM-E7-25ELITE1500-B-100.5☐☐☐☐☐☐☐
W56OEM-E4-2ELITE1500-B-70.5☐☐☐☐☐☐☐

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

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

Revisions

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No revisions yet.

Schematic

ELITE1500-AELITE1500-BOEM-E2OEM-E3OEM-E4OEM-E5OEM-E6OEM-E7SP-0VSP-14VSP-GND

Connectors

ELITE1500-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1DPO 2—W34—0.5OEM-E7-18———
10Battery ground—W9—0.85SP-GND-1———
11Battery ground—W10—0.85SP-GND-1———
12+8V DC————————
1312V ignition input—W32—0.5OEM-E3-9———
14AVI 10 (TPS)—W52—0.5OEM-E6-12———
15AVI 9 (MAP)—W51—0.5OEM-E6-11———
16AVI 2—W38—0.5OEM-E6-23———
17AVI 3—W39—0.5OEM-E6-16———
18DPO 1—W33—0.5OEM-E7-17———
19INJ 1—W26—0.5OEM-E6-5———
19INJ 1—W30—0.5OEM-E7-3———
2AVI 4—W40—0.5OEM-E6-24———
20INJ 2—W27—0.5OEM-E6-6———
20INJ 2—W31—0.5OEM-E7-4———
21INJ 3—W28—0.5OEM-E7-1———
22INJ 4—W29—0.5OEM-E7-2———
23DPO 3—W35—0.5OEM-E7-19———
24DPO 5 (fuel pump trigger)—W43—0.5OEM-E3-4———
25DPO 6 (ECR out)—W42—0.5OEM-E3-10———
26ECU injector power input—W5—0.85SP-14V-1———
3IGN 1—W23—0.5OEM-E7-11———
31Stepper 1 P1 / DPO—W44—0.5OEM-E4-13———
32Stepper 1 P2 / DPO—W45—0.5OEM-E2-25———
33Stepper 1 P3 / DPO—W46—0.5OEM-E2-26———
34Stepper 1 P4 / DPO—W47—0.5OEM-E6-3———
4IGN 2—W24—0.5OEM-E7-12———
5IGN 3—W25—0.5OEM-E7-13———
6IGN 4————————
9+5V DC—W17—0.5OEM-E6-2———

ELITE1500-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Crank (Trigger) (+)—W18—0.5OEM-E7-23———
10SPI 3—W55—0.5OEM-E7-25———
11+13.8V ECU supply—W6—0.85SP-14V-1———
12AVI 6 (O2 Input 1)—W49—0.5OEM-E2-24———
13AVI 1 (O2 Input 2)—W37—0.5OEM-E6-15———
14Signal ground—W14—0.5SP-0V-1———
15Signal ground—W15—0.5SP-0V-1———
16Signal ground—W16—0.5SP-0V-1———
19DPO 4—W36—0.5OEM-E7-20———
2Cam (Home) (+)—W20—0.5OEM-E7-10———
20AVI 5—W48—0.5OEM-E6-10———
21KNOCK 1—W22—0.5OEM-E7-28———
23CAN H————————
24CAN L————————
25DBW 1 / DPO————————
26DBW 2 / DPO————————
3AVI 7 (Air Temp)—W50—0.5OEM-E4-8———
4AVI 8 (Coolant Temp)—W41—0.5OEM-E6-14———
5Crank (Trigger) (−)—W19—0.5SP-0V-1———
6Cam (Home) (−)—W21—0.5SP-0V-1———
7SPI 4—W56—0.5OEM-E4-2———
8SPI 1—W53—0.5OEM-E5-11———
9SPI 2—W54—0.5OEM-E5-5———

OEM-E2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
13ETCS power (TBP, throttle bypass)—W1—0.85SP-14V-1———
24O2 right rear (OXR2)—W49—0.5ELITE1500-B-12———
25O2 heater right rear (HTR2)—W45—0.5ELITE1500-A-32———
26O2 heater left rear (HTL2)—W46—0.5ELITE1500-A-33———

OEM-E3

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Battery constant (BATT)————————
10EFI main relay control (MREL)—W42—0.5ELITE1500-A-25———
11Serial diagnostic (SIL)————————
16EFI main relay (+B)—W2—0.85SP-14V-1———
4Fuel pump relay (FPR)—W43—0.5ELITE1500-A-24———
5Fuel pump control (FC)————————
6Check-engine lamp (W)————————
7ETCS main relay (+BM)—W3—0.85SP-14V-1———
8EFI main relay (+B2)—W4—0.85SP-14V-1———
9Ignition switch (IGSW)—W32—0.5ELITE1500-A-13———

OEM-E4

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
13A/C clutch relay (ACMG)—W44—0.5ELITE1500-A-31———
18EVAP vapor pressure (PTNK)————————
2Starter signal (STA)—W56—0.5ELITE1500-B-7———
5Diagnostic/timing check (TC)————————
6Stop light switch (STP)————————
8O2 left rear (OXL2)—W50—0.5ELITE1500-B-3———

OEM-E5

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11Vehicle speed sensor (SP2-)—W53—0.5ELITE1500-B-8———
12Canister close valve (CCV)————————
5Vehicle speed sensor (SP2+)—W54—0.5ELITE1500-B-9———

OEM-E6

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Mass air flow (VG)—W48—0.5ELITE1500-B-20———
11O2 right front (OXR1)—W51—0.5ELITE1500-A-15———
12O2 left front (OXL1)—W52—0.5ELITE1500-A-14———
14Coolant temperature (THW)—W41—0.5ELITE1500-B-4———
15Accelerator pedal 1 (VPA)—W37—0.5ELITE1500-B-13———
16Accelerator pedal 2 (VPA2)—W39—0.5ELITE1500-A-17———
17Power ground (E1)—W7—0.85SP-GND-1———
18Sensor ground (E2)—W11—0.5SP-0V-1———
19MAF ground (EVG)—W12—0.5SP-0V-1———
2Sensor supply +5V (VC)—W17—0.5ELITE1500-A-9———
22Intake air temperature (THA)————————
23Throttle position 1 (VTA)—W38—0.5ELITE1500-A-16———
24Throttle position 2 (VTA2)—W40—0.5ELITE1500-A-2———
3O2 heater right front (HTR)—W47—0.5ELITE1500-A-34———
4O2 heater left front (HTL)————————
5Injector 1 (#10)—W26—0.5ELITE1500-A-19———
6Injector 2 (#20)—W27—0.5ELITE1500-A-20———
7EVAP purge VSV (PRG)————————

OEM-E7

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 3 (#30)—W28—0.5ELITE1500-A-21———
10Cam position (G2)—W20—0.5ELITE1500-B-2———
11Ignition 1 (IGT)—W23—0.5ELITE1500-A-3———
12Ignition 2 (IGT2)—W24—0.5ELITE1500-A-4———
13Ignition 3 (IGT3)—W25—0.5ELITE1500-A-5———
17VVT-i OCV - (OCV-)—W33—0.5ELITE1500-A-18———
18VVT-i OCV + (OCV+)—W34—0.5ELITE1500-A-1———
19ETCS throttle clutch - (CL-)—W35—0.5ELITE1500-A-23———
2Injector 4 (#40)—W29—0.5ELITE1500-A-22———
20ETCS throttle clutch + (CL+)—W36—0.5ELITE1500-B-19———
21Power ground (E01)—W8—0.85SP-GND-1———
22Crank position return (NE-)—W13—0.5SP-0V-1———
23Crank position (NE)—W18—0.5ELITE1500-B-1———
25Igniter feedback (IGF)—W55—0.5ELITE1500-B-10———
27Knock sensor 2 (KNK2)————————
28Knock sensor 1 (KNK1)—W22—0.5ELITE1500-B-21———
3Injector 5 (#50)—W30—0.5ELITE1500-A-19———
4Injector 6 (#60)—W31—0.5ELITE1500-A-20———
5ACIS intake VSV————————
7ETCS throttle motor - (M-)————————
8ETCS throttle motor + (M+)————————

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-E6-18———
1——W12—0.5OEM-E6-19———
1——W13—0.5OEM-E7-22———
1——W14—0.5ELITE1500-B-14———
1——W15—0.5ELITE1500-B-15———
1——W16—0.5ELITE1500-B-16———
1——W19—0.5ELITE1500-B-5———
1——W21—0.5ELITE1500-B-6———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-E2-13———
1——W2—0.85OEM-E3-16———
1——W3—0.85OEM-E3-7———
1——W4—0.85OEM-E3-8———
1——W5—0.85ELITE1500-A-26———
1——W6—0.85ELITE1500-B-11———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W7—0.85OEM-E6-17———
1——W8—0.85OEM-E7-21———
1——W9—0.85ELITE1500-A-10———
1——W10—0.85ELITE1500-A-11———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-E2-13ETCS power (TBP, throttle bypass)power_inELITE1500-A-26 + ELITE1500-B-11ECU injector power input + +13.8V ECU supplypower_insingle_source
OEM-E2-24O2 right rear (OXR2)lambda_nb_inELITE1500-B-12AVI 6 (O2 Input 1)analog_insingle_source
OEM-E2-25O2 heater right rear (HTR2)low_side_outELITE1500-A-32Stepper 1 P2 / DPOswitch_outsingle_source
OEM-E2-26O2 heater left rear (HTL2)low_side_outELITE1500-A-33Stepper 1 P3 / DPOswitch_outsingle_source
OEM-E3-1Battery constant (BATT)power_in———single_source
OEM-E3-10EFI main relay control (MREL)low_side_outELITE1500-A-25DPO 6 (ECR out)low_side_outsingle_source
OEM-E3-11Serial diagnostic (SIL)serial———single_source
OEM-E3-16EFI main relay (+B)power_inELITE1500-A-26 + ELITE1500-B-11ECU injector power input + +13.8V ECU supplypower_insingle_source
OEM-E3-4Fuel pump relay (FPR)low_side_outELITE1500-A-24DPO 5 (fuel pump trigger)low_side_outsingle_source
OEM-E3-5Fuel pump control (FC)low_side_out———single_source
OEM-E3-6Check-engine lamp (W)low_side_out———single_source
OEM-E3-7ETCS main relay (+BM)power_inELITE1500-A-26 + ELITE1500-B-11ECU injector power input + +13.8V ECU supplypower_insingle_source
OEM-E3-8EFI main relay (+B2)power_inELITE1500-A-26 + ELITE1500-B-11ECU injector power input + +13.8V ECU supplypower_insingle_source
OEM-E3-9Ignition switch (IGSW)digital_inELITE1500-A-1312V ignition inputdigital_insingle_source
OEM-E4-13A/C clutch relay (ACMG)low_side_outELITE1500-A-31Stepper 1 P1 / DPOswitch_outsingle_source
OEM-E4-18EVAP vapor pressure (PTNK)analog_in———single_source
OEM-E4-2Starter signal (STA)digital_inELITE1500-B-7SPI 4digital_insingle_source
OEM-E4-5Diagnostic/timing check (TC)digital_in———single_source
OEM-E4-6Stop light switch (STP)digital_in———single_source
OEM-E4-8O2 left rear (OXL2)lambda_nb_inELITE1500-B-3AVI 7 (Air Temp)analog_insingle_source
OEM-E5-11Vehicle speed sensor (SP2-)digital_inELITE1500-B-8SPI 1digital_insingle_source
OEM-E5-12Canister close valve (CCV)low_side_out———single_source
OEM-E5-5Vehicle speed sensor (SP2+)digital_inELITE1500-B-9SPI 2digital_insingle_source
OEM-E6-10Mass air flow (VG)analog_inELITE1500-B-20AVI 5analog_insingle_source
OEM-E6-11O2 right front (OXR1)lambda_nb_inELITE1500-A-15AVI 9 (MAP)analog_insingle_source
OEM-E6-12O2 left front (OXL1)lambda_nb_inELITE1500-A-14AVI 10 (TPS)analog_insingle_source
OEM-E6-14Coolant temperature (THW)temp_inELITE1500-B-4AVI 8 (Coolant Temp)analog_insingle_source
OEM-E6-15Accelerator pedal 1 (VPA)analog_inELITE1500-B-13AVI 1 (O2 Input 2)analog_insingle_source
OEM-E6-16Accelerator pedal 2 (VPA2)analog_inELITE1500-A-17AVI 3analog_insingle_source
OEM-E6-17Power ground (E1)groundELITE1500-A-10 + ELITE1500-A-11Battery ground + Battery groundgroundsingle_source
OEM-E6-18Sensor 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-E6-19MAF ground (EVG)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-E6-2Sensor supply +5V (VC)vrefELITE1500-A-9+5V DCvrefsingle_source
OEM-E6-22Intake air temperature (THA)temp_in———single_source
OEM-E6-23Throttle position 1 (VTA)analog_inELITE1500-A-16AVI 2analog_insingle_source
OEM-E6-24Throttle position 2 (VTA2)analog_inELITE1500-A-2AVI 4analog_insingle_source
OEM-E6-3O2 heater right front (HTR)low_side_outELITE1500-A-34Stepper 1 P4 / DPOswitch_outsingle_source
OEM-E6-4O2 heater left front (HTL)low_side_out———single_source
OEM-E6-5Injector 1 (#10)injector_outELITE1500-A-19INJ 1injector_outsingle_source
OEM-E6-6Injector 2 (#20)injector_outELITE1500-A-20INJ 2injector_outsingle_source
OEM-E6-7EVAP purge VSV (PRG)low_side_out———single_source
OEM-E7-1Injector 3 (#30)injector_outELITE1500-A-21INJ 3injector_outsingle_source
OEM-E7-10Cam position (G2)trigger_inELITE1500-B-2Cam (Home) (+)trigger_insingle_source
OEM-E7-11Ignition 1 (IGT)ignition_outELITE1500-A-3IGN 1ignition_outsingle_source
OEM-E7-12Ignition 2 (IGT2)ignition_outELITE1500-A-4IGN 2ignition_outsingle_source
OEM-E7-13Ignition 3 (IGT3)ignition_outELITE1500-A-5IGN 3ignition_outsingle_source
OEM-E7-17VVT-i OCV - (OCV-)low_side_outELITE1500-A-18DPO 1low_side_outsingle_source
OEM-E7-18VVT-i OCV + (OCV+)low_side_outELITE1500-A-1DPO 2low_side_outsingle_source
OEM-E7-19ETCS throttle clutch - (CL-)low_side_outELITE1500-A-23DPO 3low_side_outsingle_source
OEM-E7-2Injector 4 (#40)injector_outELITE1500-A-22INJ 4injector_outsingle_source
OEM-E7-20ETCS throttle clutch + (CL+)low_side_outELITE1500-B-19DPO 4low_side_outsingle_source
OEM-E7-21Power ground (E01)groundELITE1500-A-10 + ELITE1500-A-11Battery ground + Battery groundgroundsingle_source
OEM-E7-22Crank position return (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-E7-23Crank position (NE)trigger_inELITE1500-B-1Crank (Trigger) (+)trigger_insingle_source
OEM-E7-25Igniter feedback (IGF)digital_inELITE1500-B-10SPI 3digital_insingle_source
OEM-E7-27Knock sensor 2 (KNK2)knock_in———single_source
OEM-E7-28Knock sensor 1 (KNK1)knock_inELITE1500-B-21KNOCK 1knock_insingle_source
OEM-E7-3Injector 5 (#50)injector_outELITE1500-A-19INJ 1injector_outsingle_source
OEM-E7-4Injector 6 (#60)injector_outELITE1500-A-20INJ 2injector_outsingle_source
OEM-E7-5ACIS intake VSVlow_side_out———single_source
OEM-E7-7ETCS throttle motor - (M-)hbridge_out———single_source
OEM-E7-8ETCS throttle motor + (M+)hbridge_out———single_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-E2-13SP-14V-10.85no routeETCS power (TBP, throttle bypass)—
W2OEM-E3-16SP-14V-10.85no routeEFI main relay (+B)—
W3OEM-E3-7SP-14V-10.85no routeETCS main relay (+BM)—
W4OEM-E3-8SP-14V-10.85no routeEFI main relay (+B2)—
W5SP-14V-1ELITE1500-A-260.85no routeECU injector power input—
W6SP-14V-1ELITE1500-B-110.85no route+13.8V ECU supply—
W7OEM-E6-17SP-GND-10.85no routePower ground (E1)—
W8OEM-E7-21SP-GND-10.85no routePower ground (E01)—
W9SP-GND-1ELITE1500-A-100.85no routeBattery ground—
W10SP-GND-1ELITE1500-A-110.85no routeBattery ground—
W11OEM-E6-18SP-0V-10.5no routeSensor ground (E2)—
W12OEM-E6-19SP-0V-10.5no routeMAF ground (EVG)—
W13OEM-E7-22SP-0V-10.5no routeCrank position return (NE-)—
W14SP-0V-1ELITE1500-B-140.5no routeSignal ground—
W15SP-0V-1ELITE1500-B-150.5no routeSignal ground—
W16SP-0V-1ELITE1500-B-160.5no routeSignal ground—
W17OEM-E6-2ELITE1500-A-90.5no routeSensor supply +5V (VC)—
W18OEM-E7-23ELITE1500-B-10.5no routeCrank position (NE)—
W19SP-0V-1ELITE1500-B-50.5no routeCrank (Trigger) (−)—
W20OEM-E7-10ELITE1500-B-20.5no routeCam position (G2)—
W21SP-0V-1ELITE1500-B-60.5no routeCam (Home) (−)—
W22OEM-E7-28ELITE1500-B-210.5no routeKnock sensor 1 (KNK1)—
W23OEM-E7-11ELITE1500-A-30.5no routeIgnition 1 (IGT)—
W24OEM-E7-12ELITE1500-A-40.5no routeIgnition 2 (IGT2)—
W25OEM-E7-13ELITE1500-A-50.5no routeIgnition 3 (IGT3)—
W26OEM-E6-5ELITE1500-A-190.5no routeInjector 1 (#10)—
W27OEM-E6-6ELITE1500-A-200.5no routeInjector 2 (#20)—
W28OEM-E7-1ELITE1500-A-210.5no routeInjector 3 (#30)—
W29OEM-E7-2ELITE1500-A-220.5no routeInjector 4 (#40)—
W30OEM-E7-3ELITE1500-A-190.5no routeInjector 5 (#50)—
W31OEM-E7-4ELITE1500-A-200.5no routeInjector 6 (#60)—
W32OEM-E3-9ELITE1500-A-130.5no routeIgnition switch (IGSW)—
W33OEM-E7-17ELITE1500-A-180.5no routeVVT-i OCV - (OCV-)—
W34OEM-E7-18ELITE1500-A-10.5no routeVVT-i OCV + (OCV+)—
W35OEM-E7-19ELITE1500-A-230.5no routeETCS throttle clutch - (CL-)—
W36OEM-E7-20ELITE1500-B-190.5no routeETCS throttle clutch + (CL+)—
W37OEM-E6-15ELITE1500-B-130.5no routeAccelerator pedal 1 (VPA)—
W38OEM-E6-23ELITE1500-A-160.5no routeThrottle position 1 (VTA)—
W39OEM-E6-16ELITE1500-A-170.5no routeAccelerator pedal 2 (VPA2)—
W40OEM-E6-24ELITE1500-A-20.5no routeThrottle position 2 (VTA2)—
W41OEM-E6-14ELITE1500-B-40.5no routeCoolant temperature (THW)—
W42OEM-E3-10ELITE1500-A-250.5no routeEFI main relay control (MREL)—
W43OEM-E3-4ELITE1500-A-240.5no routeFuel pump relay (FPR)—
W44OEM-E4-13ELITE1500-A-310.5no routeA/C clutch relay (ACMG)—
W45OEM-E2-25ELITE1500-A-320.5no routeO2 heater right rear (HTR2)—
W46OEM-E2-26ELITE1500-A-330.5no routeO2 heater left rear (HTL2)—
W47OEM-E6-3ELITE1500-A-340.5no routeO2 heater right front (HTR)—
W48OEM-E6-10ELITE1500-B-200.5no routeMass air flow (VG)—
W49OEM-E2-24ELITE1500-B-120.5no routeO2 right rear (OXR2)—
W50OEM-E4-8ELITE1500-B-30.5no routeO2 left rear (OXL2)—
W51OEM-E6-11ELITE1500-A-150.5no routeO2 right front (OXR1)—
W52OEM-E6-12ELITE1500-A-140.5no routeO2 left front (OXL1)—
W53OEM-E5-11ELITE1500-B-80.5no routeVehicle speed sensor (SP2-)—
W54OEM-E5-5ELITE1500-B-90.5no routeVehicle speed sensor (SP2+)—
W55OEM-E7-25ELITE1500-B-100.5no routeIgniter feedback (IGF)—
W56OEM-E4-2ELITE1500-B-70.5no routeStarter signal (STA)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (11)

SeverityCodeSubjectMessage
errorNET_MERGEDELITE1500-A-19 + OEM-E6-5 + OEM-E7-32 different OEM functions share one net: OEM-E6-5 Injector 1 (#10); OEM-E7-3 Injector 5 (#50)
errorNET_MERGEDELITE1500-A-20 + OEM-E6-6 + OEM-E7-42 different OEM functions share one net: OEM-E6-6 Injector 2 (#20); OEM-E7-4 Injector 6 (#60)
errorREQUIRED_UNMAPPEDOEM-E7-7Required OEM function "ETCS throttle motor - (M-)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E7-8Required OEM function "ETCS throttle motor + (M+)" (hbridge_out) is not connected to the new ECU.
infoNET_FAMILYOEM-E2-25 ↔ ELITE1500-A-32OEM-E2-25 "O2 heater right rear (HTR2)" [low_side_out] is wired to ELITE1500-A-32 "Stepper 1 P2 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E2-26 ↔ ELITE1500-A-33OEM-E2-26 "O2 heater left rear (HTL2)" [low_side_out] is wired to ELITE1500-A-33 "Stepper 1 P3 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E4-13 ↔ ELITE1500-A-31OEM-E4-13 "A/C clutch relay (ACMG)" [low_side_out] is wired to ELITE1500-A-31 "Stepper 1 P1 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E6-14 ↔ ELITE1500-B-4OEM-E6-14 "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-E6-18 ↔ ELITE1500-B-5OEM-E6-18 "Sensor ground (E2)" [sensor_ground] is wired to ELITE1500-B-5 "Crank (Trigger) (−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs.
infoNET_FAMILYOEM-E6-3 ↔ ELITE1500-A-34OEM-E6-3 "O2 heater right front (HTR)" [low_side_out] is wired to ELITE1500-A-34 "Stepper 1 P4 / DPO" [switch_out]. Configure this output as low side.
infoUNMAPPEDOEM12 optional OEM pins are not mapped: OEM-E3-11 Serial diagnostic (SIL); OEM-E3-5 Fuel pump control (FC); OEM-E3-6 Check-engine lamp (W); OEM-E4-18 EVAP vapor pressure (PTNK); OEM-E4-5 Diagnostic/timing check (TC); OEM-E4-6 Stop light switch (STP); OEM-E5-12 Canister close valve (CCV); OEM-E6-22 Intake air temperature (THA); OEM-E6-4 O2 heater left front (HTL); OEM-E6-7 EVAP purge VSV (PRG); OEM-E7-27 Knock sensor 2 (KNK2); OEM-E7-5 ACIS intake VSV

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-E3-1Battery-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. Open items: - OEM-E7 7: ETCS throttle motor - (M-): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-E7 8: ETCS throttle motor + (M+): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-E3 1: Battery constant (BATT): Haltech Elite 1500 has no battery-constant input; not needed - OEM-E7 27: Knock sensor 2 (KNK2): no free knock input on Haltech Elite 1500 - OEM-E6 4: O2 heater left front (HTL): no free heater_low_side/low_side/relay_control/ls_hs/injector on Haltech Elite 1500 - OEM-E3 5: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-E3 6: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-E5 12: Canister close valve (CCV): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-E6 7: EVAP purge VSV (PRG): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-E7 5: ACIS intake VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Elite 1500 - OEM-E6 22: Intake air temperature (THA): no free thermistor/analog_0_5 on Haltech Elite 1500 - OEM-E4 18: EVAP vapor pressure (PTNK): no free analog_0_5 on Haltech Elite 1500 - OEM-E4 5: Diagnostic/timing check (TC): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-E4 6: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 1500 - OEM-E3 11: Serial diagnostic (SIL): no free k_line 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
4service_manualToyota FSM RM779U (2001 Lexus IS300) — DIAGNOSTICS 'TERMINALS OF ECM' (DI-20/21)http://www.2jzgarage.com/wp-content/uploads/2013/04/2001_IS300_ECU_Pinouts.pdf———