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Toyota Supra A80 1993-98 USDM (2JZ-GTE, non-VVT) → Haltech Nexus S3 HT-213000 (auto)

Toyota Supra A80 1993-98 USDM (2JZ-GTE, non-VVT) — Haltech — Nexus S3
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-07

Before you start

Statusproposal · not yet verified: nobody has reported building and running this harness
Open errorsnone
Size of the job61 wires · 7 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-E10-31SP-14V-10.85☐☐☐☐☐☐☐
W2SP-14V-1NEXUSS3-A-180.85☐☐☐☐☐☐☐
W3SP-14V-1NEXUSS3-A-250.85☐☐☐☐☐☐☐
W4OEM-E9-4SP-GND-10.85☐☐☐☐☐☐☐
W5OEM-E9-69SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-E9-78SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-E9-79SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-E9-80SP-GND-10.85☐☐☐☐☐☐☐
W9SP-GND-1NEXUSS3-A-100.85☐☐☐☐☐☐☐
W10SP-GND-1NEXUSS3-A-110.85☐☐☐☐☐☐☐
W11OEM-E9-5SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-E9-6SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-E9-65SP-0V-10.5☐☐☐☐☐☐☐
W14OEM-E9-7SP-0V-10.5☐☐☐☐☐☐☐
W15SP-0V-1NEXUSS3-C-260.5☐☐☐☐☐☐☐
W16OEM-E9-41NEXUSS3-C-250.5☐☐☐☐☐☐☐
W17OEM-E9-27NEXUSS3-C-10.5☐☐☐☐☐☐☐
W18SP-0V-1NEXUSS3-C-20.5☐☐☐☐☐☐☐
W19OEM-E9-26NEXUSS3-C-30.5☐☐☐☐☐☐☐
W20SP-0V-1NEXUSS3-C-40.5☐☐☐☐☐☐☐
W21OEM-E9-25NEXUSS3-C-50.5☐☐☐☐☐☐☐
W22OEM-E9-50NEXUSS3-C-230.5☐☐☐☐☐☐☐
W23OEM-E9-49NEXUSS3-C-240.5☐☐☐☐☐☐☐
W24OEM-E9-57NEXUSS3-A-270.5☐☐☐☐☐☐☐
W25OEM-E9-56NEXUSS3-A-280.5☐☐☐☐☐☐☐
W26OEM-E9-55NEXUSS3-A-290.5☐☐☐☐☐☐☐
W27OEM-E9-54NEXUSS3-A-300.5☐☐☐☐☐☐☐
W28OEM-E9-53NEXUSS3-A-310.5☐☐☐☐☐☐☐
W29OEM-E9-52NEXUSS3-A-320.5☐☐☐☐☐☐☐
W30OEM-E9-20NEXUSS3-A-10.5☐☐☐☐☐☐☐
W31OEM-E9-19NEXUSS3-A-20.5☐☐☐☐☐☐☐
W32OEM-E9-18NEXUSS3-A-30.5☐☐☐☐☐☐☐
W33OEM-E9-17NEXUSS3-A-40.5☐☐☐☐☐☐☐
W34OEM-E9-16NEXUSS3-A-50.5☐☐☐☐☐☐☐
W35OEM-E9-15NEXUSS3-A-60.5☐☐☐☐☐☐☐
W36OEM-E10-1NEXUSS3-A-130.5☐☐☐☐☐☐☐
W37OEM-E10-23NEXUSS3-A-260.5☐☐☐☐☐☐☐
W38OEM-E10-24NEXUSS3-A-90.5☐☐☐☐☐☐☐
W39OEM-E9-71NEXUSS3-C-330.5☐☐☐☐☐☐☐
W40OEM-E9-72NEXUSS3-A-120.5☐☐☐☐☐☐☐
W41OEM-E10-22NEXUSS3-A-140.5☐☐☐☐☐☐☐
W42OEM-E10-6NEXUSS3-A-150.5☐☐☐☐☐☐☐
W43OEM-E9-32NEXUSS3-A-160.5☐☐☐☐☐☐☐
W44OEM-E9-33NEXUSS3-A-170.5☐☐☐☐☐☐☐
W45OEM-E9-34NEXUSS3-A-70.5☐☐☐☐☐☐☐
W46OEM-E9-35NEXUSS3-A-80.5☐☐☐☐☐☐☐
W47OEM-E9-60NEXUSS3-A-190.5☐☐☐☐☐☐☐
W48OEM-E9-73NEXUSS3-A-200.5☐☐☐☐☐☐☐
W49OEM-E9-74NEXUSS3-A-210.5☐☐☐☐☐☐☐
W50OEM-E9-62NEXUSS3-C-100.5☐☐☐☐☐☐☐
W51OEM-E9-43NEXUSS3-C-110.5☐☐☐☐☐☐☐
W52OEM-E9-47NEXUSS3-C-120.5☐☐☐☐☐☐☐
W53OEM-E9-48NEXUSS3-C-130.5☐☐☐☐☐☐☐
W54OEM-E9-44NEXUSS3-C-140.5☐☐☐☐☐☐☐
W55OEM-E9-45NEXUSS3-C-150.5☐☐☐☐☐☐☐
W56OEM-E10-2NEXUSS3-C-60.5☐☐☐☐☐☐☐
W57OEM-E10-21NEXUSS3-C-70.5☐☐☐☐☐☐☐
W58OEM-E9-58NEXUSS3-C-80.5☐☐☐☐☐☐☐
W59OEM-E10-15NEXUSS3-C-190.5☐☐☐☐☐☐☐
W60OEM-E10-4NEXUSS3-C-200.5☐☐☐☐☐☐☐
W61OEM-E9-76NEXUSS3-C-160.5☐☐☐☐☐☐☐

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
1NEXUSS3-A-18NEXUSS3-A-10open (OL)+12 V supply must not touch power ground
2NEXUSS3-A-18NEXUSS3-C-2open (OL)+12 V supply must not touch sensor ground
3NEXUSS3-C-25NEXUSS3-C-2open (OL)5 V sensor reference must not touch sensor ground
4NEXUSS3-A-10NEXUSS3-C-25open (OL)power ground must not touch 5 V sensor reference
5NEXUSS3-A-18NEXUSS3-C-25open (OL)+12 V supply must not touch 5 V sensor reference

Revisions

RevLabelByDate
No revisions yet.

Schematic

NEXUSS3-ANEXUSS3-COEM-E10OEM-E9SP-0VSP-14VSP-GND

Connectors

NEXUSS3-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 1—W30—0.5OEM-E9-20———
10Battery ground—W9—0.85SP-GND-1———
11Battery ground—W10—0.85SP-GND-1———
12DPO 2—W40—0.5OEM-E9-72———
13Ignition switch input—W36—0.5OEM-E10-1———
14DPO 3—W41—0.5OEM-E10-22———
15DPO 4—W42—0.5OEM-E10-6———
16DPO 5—W43—0.5OEM-E9-32———
17DPO 6—W44—0.5OEM-E9-33———
18+12V switched input—W2—0.85SP-14V-1———
19HBO 1—W47—0.5OEM-E9-60———
2Injector 2—W31—0.5OEM-E9-19———
20HBO 2—W48—0.5OEM-E9-73———
21HBO 3—W49—0.5OEM-E9-74———
22HBO 4————————
23CAN 1 High————————
24CAN 1 Low————————
25+12V switched input—W3—0.85SP-14V-1———
26ECR output—W37—0.5OEM-E10-23———
27Ignition 1—W24—0.5OEM-E9-57———
28Ignition 2—W25—0.5OEM-E9-56———
29Ignition 3—W26—0.5OEM-E9-55———
3Injector 3—W32—0.5OEM-E9-18———
30Ignition 4—W27—0.5OEM-E9-54———
31Ignition 5—W28—0.5OEM-E9-53———
32Ignition 6—W29—0.5OEM-E9-52———
33Ignition 7————————
34Ignition 8————————
4Injector 4—W33—0.5OEM-E9-17———
5Injector 5—W34—0.5OEM-E9-16———
6Injector 6—W35—0.5OEM-E9-15———
7Injector 7—W45—0.5OEM-E9-34———
8Injector 8—W46—0.5OEM-E9-35———
9DPO 1—W38—0.5OEM-E10-24———

NEXUSS3-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Trigger +—W17—0.5OEM-E9-27———
10AVI 1—W50—0.5OEM-E9-62———
11AVI 2—W51—0.5OEM-E9-43———
12AVI 3—W52—0.5OEM-E9-47———
13AVI 4—W53—0.5OEM-E9-48———
14AVI 5—W54—0.5OEM-E9-44———
15AVI 6—W55—0.5OEM-E9-45———
16AVI 7—W61—0.5OEM-E9-76———
17AVI 8————————
18AVI 9————————
19SPI 5—W59—0.5OEM-E10-15———
2Trigger -—W18—0.5SP-0V-1———
20SPI 6—W60—0.5OEM-E10-4———
21CAN 2 High————————
22CAN 2 Low————————
23Knock 1—W22—0.5OEM-E9-50———
24Knock 2—W23—0.5OEM-E9-49———
25+5V—W16—0.5OEM-E9-41———
26Signal ground—W15—0.5SP-0V-1———
27AVI 10————————
28AVI 11————————
29WBI 1 Heater +————————
3Home +—W19—0.5OEM-E9-26———
30WBI 1 Input————————
31WBI 1 Pump————————
32WBI 1 Nernst————————
33WBI 1 Heater -—W39—0.5OEM-E9-71———
34WBI 1 Cal————————
4Home -—W20—0.5SP-0V-1———
5SPI 1—W21—0.5OEM-E9-25———
6SPI 2—W56—0.5OEM-E10-2———
7SPI 3—W57—0.5OEM-E10-21———
8SPI 4—W58—0.5OEM-E9-58———
9+8V————————

OEM-E10

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition switch (IGSW)—W36—0.5NEXUSS3-A-13———
15Electrical load sensor (ELS)—W59—0.5NEXUSS3-C-19———
16Tachometer output————————
2Vehicle speed sensor (SP1)—W56—0.5NEXUSS3-C-6———
21Fuel pump diagnostic (DI)—W57—0.5NEXUSS3-C-7———
22Fuel pump control (FPC)—W41—0.5NEXUSS3-A-14———
23A/C clutch relay (ACMG)—W37—0.5NEXUSS3-A-26———
24Main relay control (M-REL)—W38—0.5NEXUSS3-A-9———
31ECU power +B (main relay)—W1—0.85SP-14V-1———
33Battery constant (BATT)————————
4Brake switch (STP)—W60—0.5NEXUSS3-C-20———
6Malfunction indicator lamp (MIL)—W42—0.5NEXUSS3-A-15———

OEM-E9

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
15Injector 6—W35—0.5NEXUSS3-A-6———
16Injector 5—W34—0.5NEXUSS3-A-5———
17Injector 4—W33—0.5NEXUSS3-A-4———
18Injector 3—W32—0.5NEXUSS3-A-3———
19Injector 2—W31—0.5NEXUSS3-A-2———
20Injector 1—W30—0.5NEXUSS3-A-1———
25Camshaft position 2 (G2)—W21—0.5NEXUSS3-C-5———
26Camshaft position 1 (G1)—W19—0.5NEXUSS3-C-3———
27Crank position (NE)—W17—0.5NEXUSS3-C-1———
32ISC stepper winding—W43—0.5NEXUSS3-A-16———
33ISC stepper winding—W44—0.5NEXUSS3-A-17———
34ISC stepper winding—W45—0.5NEXUSS3-A-7———
35ISC stepper winding—W46—0.5NEXUSS3-A-8———
4Power ground (E11)—W4—0.85SP-GND-1———
41Sensor supply +5V (VCC)—W16—0.5NEXUSS3-C-25———
43Throttle position (VTA1)—W51—0.5NEXUSS3-C-11———
44Coolant temperature (THW)—W54—0.5NEXUSS3-C-14———
45Intake air temperature (THA)—W55—0.5NEXUSS3-C-15———
47O2 sensor 2 (OX2)—W52—0.5NEXUSS3-C-12———
48O2 sensor 1 (OX1)—W53—0.5NEXUSS3-C-13———
49Knock sensor 2 (KNK2)—W23—0.5NEXUSS3-C-24———
5Cam sensor 2 ground (G2-)—W11—0.5SP-0V-1———
50Knock sensor 1 (KNK1)—W22—0.5NEXUSS3-C-23———
52Ignition 6 (IGT6)—W29—0.5NEXUSS3-A-32———
53Ignition 5 (IGT5)—W28—0.5NEXUSS3-A-31———
54Ignition 4 (IGT4)—W27—0.5NEXUSS3-A-30———
55Ignition 3 (IGT3)—W26—0.5NEXUSS3-A-29———
56Ignition 2 (IGT2)—W25—0.5NEXUSS3-A-28———
57Ignition 1 (IGT1)—W24—0.5NEXUSS3-A-27———
58Ignition confirmation (IGF)—W58—0.5NEXUSS3-C-8———
6Cam sensor 1 ground (G1-)—W12—0.5SP-0V-1———
60Wastegate VSV (boost control)—W47—0.5NEXUSS3-A-19———
62MAP sensor (PIM)—W50—0.5NEXUSS3-C-10———
65Sensor ground (E2)—W13—0.5SP-0V-1———
69ECU power ground (E1)—W5—0.85SP-GND-1———
7Crank sensor ground (NE-)—W14—0.5SP-0V-1———
71O2 heater 1 (HT1)—W39—0.5NEXUSS3-C-33———
72O2 heater 2 (HT2)—W40—0.5NEXUSS3-A-12———
73Fuel pressure-up VSV (FPU)—W48—0.5NEXUSS3-A-20———
74Purge VSV (EVAP)—W49—0.5NEXUSS3-A-21———
76Starter signal (STA)—W61—0.5NEXUSS3-C-16———
78Power ground (E01)—W6—0.85SP-GND-1———
79Power ground (E01/E02)—W7—0.85SP-GND-1———
80Power ground (E01/E02)—W8—0.85SP-GND-1———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-E9-5———
1——W12—0.5OEM-E9-6———
1——W13—0.5OEM-E9-65———
1——W14—0.5OEM-E9-7———
1——W15—0.5NEXUSS3-C-26———
1——W18—0.5NEXUSS3-C-2———
1——W20—0.5NEXUSS3-C-4———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-E10-31———
1——W2—0.85NEXUSS3-A-18———
1——W3—0.85NEXUSS3-A-25———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-E9-4———
1——W5—0.85OEM-E9-69———
1——W6—0.85OEM-E9-78———
1——W7—0.85OEM-E9-79———
1——W8—0.85OEM-E9-80———
1——W9—0.85NEXUSS3-A-10———
1——W10—0.85NEXUSS3-A-11———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-E10-1Ignition switch (IGSW)digital_inNEXUSS3-A-13Ignition switch inputdigital_incorroborated
OEM-E10-15Electrical load sensor (ELS)digital_inNEXUSS3-C-19SPI 5digital_insingle_source
OEM-E10-16Tachometer outputtacho_out———corroborated
OEM-E10-2Vehicle speed sensor (SP1)digital_inNEXUSS3-C-6SPI 2digital_incorroborated
OEM-E10-21Fuel pump diagnostic (DI)digital_inNEXUSS3-C-7SPI 3digital_insingle_source
OEM-E10-22Fuel pump control (FPC)low_side_outNEXUSS3-A-14DPO 3low_side_outcorroborated
OEM-E10-23A/C clutch relay (ACMG)low_side_outNEXUSS3-A-26ECR outputlow_side_outcorroborated
OEM-E10-24Main relay control (M-REL)low_side_outNEXUSS3-A-9DPO 1low_side_outcorroborated
OEM-E10-31ECU power +B (main relay)power_inNEXUSS3-A-18 + NEXUSS3-A-25+12V switched input + +12V switched inputpower_incorroborated
OEM-E10-33Battery constant (BATT)power_in———single_source
OEM-E10-4Brake switch (STP)digital_inNEXUSS3-C-20SPI 6digital_insingle_source
OEM-E10-6Malfunction indicator lamp (MIL)low_side_outNEXUSS3-A-15DPO 4low_side_outcorroborated
OEM-E9-15Injector 6injector_outNEXUSS3-A-6Injector 6injector_outcorroborated
OEM-E9-16Injector 5injector_outNEXUSS3-A-5Injector 5injector_outcorroborated
OEM-E9-17Injector 4injector_outNEXUSS3-A-4Injector 4injector_outcorroborated
OEM-E9-18Injector 3injector_outNEXUSS3-A-3Injector 3injector_outcorroborated
OEM-E9-19Injector 2injector_outNEXUSS3-A-2Injector 2injector_outcorroborated
OEM-E9-20Injector 1injector_outNEXUSS3-A-1Injector 1injector_outcorroborated
OEM-E9-25Camshaft position 2 (G2)trigger_inNEXUSS3-C-5SPI 1digital_incorroborated
OEM-E9-26Camshaft position 1 (G1)trigger_inNEXUSS3-C-3Home +trigger_incorroborated
OEM-E9-27Crank position (NE)trigger_inNEXUSS3-C-1Trigger +trigger_incorroborated
OEM-E9-32ISC stepper windinglow_side_outNEXUSS3-A-16DPO 5low_side_outcorroborated
OEM-E9-33ISC stepper windinglow_side_outNEXUSS3-A-17DPO 6low_side_outcorroborated
OEM-E9-34ISC stepper windinglow_side_outNEXUSS3-A-7Injector 7injector_outcorroborated
OEM-E9-35ISC stepper windinglow_side_outNEXUSS3-A-8Injector 8injector_outcorroborated
OEM-E9-4Power ground (E11)groundNEXUSS3-A-10 + NEXUSS3-A-11Battery ground + Battery groundgroundsingle_source
OEM-E9-41Sensor supply +5V (VCC)vrefNEXUSS3-C-25+5Vvrefcorroborated
OEM-E9-43Throttle position (VTA1)analog_inNEXUSS3-C-11AVI 2analog_incorroborated
OEM-E9-44Coolant temperature (THW)temp_inNEXUSS3-C-14AVI 5analog_incorroborated
OEM-E9-45Intake air temperature (THA)temp_inNEXUSS3-C-15AVI 6analog_incorroborated
OEM-E9-47O2 sensor 2 (OX2)lambda_nb_inNEXUSS3-C-12AVI 3analog_insingle_source
OEM-E9-48O2 sensor 1 (OX1)lambda_nb_inNEXUSS3-C-13AVI 4analog_incorroborated
OEM-E9-49Knock sensor 2 (KNK2)knock_inNEXUSS3-C-24Knock 2knock_incorroborated
OEM-E9-5Cam sensor 2 ground (G2-)sensor_groundNEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4Trigger - + Signal ground + Home -sensor_ground + trigger_incorroborated
OEM-E9-50Knock sensor 1 (KNK1)knock_inNEXUSS3-C-23Knock 1knock_incorroborated
OEM-E9-52Ignition 6 (IGT6)ignition_outNEXUSS3-A-32Ignition 6ignition_outcorroborated
OEM-E9-53Ignition 5 (IGT5)ignition_outNEXUSS3-A-31Ignition 5ignition_outcorroborated
OEM-E9-54Ignition 4 (IGT4)ignition_outNEXUSS3-A-30Ignition 4ignition_outcorroborated
OEM-E9-55Ignition 3 (IGT3)ignition_outNEXUSS3-A-29Ignition 3ignition_outcorroborated
OEM-E9-56Ignition 2 (IGT2)ignition_outNEXUSS3-A-28Ignition 2ignition_outcorroborated
OEM-E9-57Ignition 1 (IGT1)ignition_outNEXUSS3-A-27Ignition 1ignition_outcorroborated
OEM-E9-58Ignition confirmation (IGF)digital_inNEXUSS3-C-8SPI 4digital_insingle_source
OEM-E9-6Cam sensor 1 ground (G1-)sensor_groundNEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4Trigger - + Signal ground + Home -sensor_ground + trigger_incorroborated
OEM-E9-60Wastegate VSV (boost control)low_side_outNEXUSS3-A-19HBO 1hbridge_outsingle_source
OEM-E9-62MAP sensor (PIM)analog_inNEXUSS3-C-10AVI 1analog_insingle_source
OEM-E9-65Sensor ground (E2)sensor_groundNEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4Trigger - + Signal ground + Home -sensor_ground + trigger_incorroborated
OEM-E9-69ECU power ground (E1)groundNEXUSS3-A-10 + NEXUSS3-A-11Battery ground + Battery groundgroundcorroborated
OEM-E9-7Crank sensor ground (NE-)sensor_groundNEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4Trigger - + Signal ground + Home -sensor_ground + trigger_incorroborated
OEM-E9-71O2 heater 1 (HT1)low_side_outNEXUSS3-C-33WBI 1 Heater -low_side_outsingle_source
OEM-E9-72O2 heater 2 (HT2)low_side_outNEXUSS3-A-12DPO 2low_side_outsingle_source
OEM-E9-73Fuel pressure-up VSV (FPU)low_side_outNEXUSS3-A-20HBO 2hbridge_outsingle_source
OEM-E9-74Purge VSV (EVAP)low_side_outNEXUSS3-A-21HBO 3hbridge_outsingle_source
OEM-E9-76Starter signal (STA)digital_inNEXUSS3-C-16AVI 7analog_insingle_source
OEM-E9-78Power ground (E01)groundNEXUSS3-A-10 + NEXUSS3-A-11Battery ground + Battery groundgroundsingle_source
OEM-E9-79Power ground (E01/E02)groundNEXUSS3-A-10 + NEXUSS3-A-11Battery ground + Battery groundgroundcorroborated
OEM-E9-80Power ground (E01/E02)groundNEXUSS3-A-10 + NEXUSS3-A-11Battery ground + Battery groundgroundcorroborated

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-E10-31SP-14V-10.85no routeECU power +B (main relay)—
W2SP-14V-1NEXUSS3-A-180.85no route+12V switched input—
W3SP-14V-1NEXUSS3-A-250.85no route+12V switched input—
W4OEM-E9-4SP-GND-10.85no routePower ground (E11)—
W5OEM-E9-69SP-GND-10.85no routeECU power ground (E1)—
W6OEM-E9-78SP-GND-10.85no routePower ground (E01)—
W7OEM-E9-79SP-GND-10.85no routePower ground (E01/E02)—
W8OEM-E9-80SP-GND-10.85no routePower ground (E01/E02)—
W9SP-GND-1NEXUSS3-A-100.85no routeBattery ground—
W10SP-GND-1NEXUSS3-A-110.85no routeBattery ground—
W11OEM-E9-5SP-0V-10.5no routeCam sensor 2 ground (G2-)—
W12OEM-E9-6SP-0V-10.5no routeCam sensor 1 ground (G1-)—
W13OEM-E9-65SP-0V-10.5no routeSensor ground (E2)—
W14OEM-E9-7SP-0V-10.5no routeCrank sensor ground (NE-)—
W15SP-0V-1NEXUSS3-C-260.5no routeSignal ground—
W16OEM-E9-41NEXUSS3-C-250.5no routeSensor supply +5V (VCC)—
W17OEM-E9-27NEXUSS3-C-10.5no routeCrank position (NE)—
W18SP-0V-1NEXUSS3-C-20.5no routeTrigger -—
W19OEM-E9-26NEXUSS3-C-30.5no routeCamshaft position 1 (G1)—
W20SP-0V-1NEXUSS3-C-40.5no routeHome -—
W21OEM-E9-25NEXUSS3-C-50.5no routeCamshaft position 2 (G2)—
W22OEM-E9-50NEXUSS3-C-230.5no routeKnock sensor 1 (KNK1)—
W23OEM-E9-49NEXUSS3-C-240.5no routeKnock sensor 2 (KNK2)—
W24OEM-E9-57NEXUSS3-A-270.5no routeIgnition 1 (IGT1)—
W25OEM-E9-56NEXUSS3-A-280.5no routeIgnition 2 (IGT2)—
W26OEM-E9-55NEXUSS3-A-290.5no routeIgnition 3 (IGT3)—
W27OEM-E9-54NEXUSS3-A-300.5no routeIgnition 4 (IGT4)—
W28OEM-E9-53NEXUSS3-A-310.5no routeIgnition 5 (IGT5)—
W29OEM-E9-52NEXUSS3-A-320.5no routeIgnition 6 (IGT6)—
W30OEM-E9-20NEXUSS3-A-10.5no routeInjector 1—
W31OEM-E9-19NEXUSS3-A-20.5no routeInjector 2—
W32OEM-E9-18NEXUSS3-A-30.5no routeInjector 3—
W33OEM-E9-17NEXUSS3-A-40.5no routeInjector 4—
W34OEM-E9-16NEXUSS3-A-50.5no routeInjector 5—
W35OEM-E9-15NEXUSS3-A-60.5no routeInjector 6—
W36OEM-E10-1NEXUSS3-A-130.5no routeIgnition switch (IGSW)—
W37OEM-E10-23NEXUSS3-A-260.5no routeA/C clutch relay (ACMG)—
W38OEM-E10-24NEXUSS3-A-90.5no routeMain relay control (M-REL)—
W39OEM-E9-71NEXUSS3-C-330.5no routeO2 heater 1 (HT1)—
W40OEM-E9-72NEXUSS3-A-120.5no routeO2 heater 2 (HT2)—
W41OEM-E10-22NEXUSS3-A-140.5no routeFuel pump control (FPC)—
W42OEM-E10-6NEXUSS3-A-150.5no routeMalfunction indicator lamp (MIL)—
W43OEM-E9-32NEXUSS3-A-160.5no routeISC stepper winding—
W44OEM-E9-33NEXUSS3-A-170.5no routeISC stepper winding—
W45OEM-E9-34NEXUSS3-A-70.5no routeISC stepper winding—
W46OEM-E9-35NEXUSS3-A-80.5no routeISC stepper winding—
W47OEM-E9-60NEXUSS3-A-190.5no routeWastegate VSV (boost control)—
W48OEM-E9-73NEXUSS3-A-200.5no routeFuel pressure-up VSV (FPU)—
W49OEM-E9-74NEXUSS3-A-210.5no routePurge VSV (EVAP)—
W50OEM-E9-62NEXUSS3-C-100.5no routeMAP sensor (PIM)—
W51OEM-E9-43NEXUSS3-C-110.5no routeThrottle position (VTA1)—
W52OEM-E9-47NEXUSS3-C-120.5no routeO2 sensor 2 (OX2)—
W53OEM-E9-48NEXUSS3-C-130.5no routeO2 sensor 1 (OX1)—
W54OEM-E9-44NEXUSS3-C-140.5no routeCoolant temperature (THW)—
W55OEM-E9-45NEXUSS3-C-150.5no routeIntake air temperature (THA)—
W56OEM-E10-2NEXUSS3-C-60.5no routeVehicle speed sensor (SP1)—
W57OEM-E10-21NEXUSS3-C-70.5no routeFuel pump diagnostic (DI)—
W58OEM-E9-58NEXUSS3-C-80.5no routeIgnition confirmation (IGF)—
W59OEM-E10-15NEXUSS3-C-190.5no routeElectrical load sensor (ELS)—
W60OEM-E10-4NEXUSS3-C-200.5no routeBrake switch (STP)—
W61OEM-E9-76NEXUSS3-C-160.5no routeStarter signal (STA)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (12)

SeverityCodeSubjectMessage
warnLOAD_UNKNOWNNEXUSS3-A-26NEXUSS3-A-26 "ECR output" drives OEM-E10-23 A/C clutch relay (ACMG) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnNET_FAMILYOEM-E9-25 ↔ NEXUSS3-C-5OEM-E9-25 "Camshaft position 2 (G2)" [trigger_in] is wired to NEXUSS3-C-5 "SPI 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
warnNET_FAMILYOEM-E9-60 ↔ NEXUSS3-A-19OEM-E9-60 "Wastegate VSV (boost control)" [low_side_out] is wired to NEXUSS3-A-19 "HBO 1" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-E9-73 ↔ NEXUSS3-A-20OEM-E9-73 "Fuel pressure-up VSV (FPU)" [low_side_out] is wired to NEXUSS3-A-20 "HBO 2" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-E9-74 ↔ NEXUSS3-A-21OEM-E9-74 "Purge VSV (EVAP)" [low_side_out] is wired to NEXUSS3-A-21 "HBO 3" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-E9-76 ↔ NEXUSS3-C-16OEM-E9-76 "Starter signal (STA)" [digital_in] is wired to NEXUSS3-C-16 "AVI 7" [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.
infoNET_FAMILYOEM-E9-34 ↔ NEXUSS3-A-7OEM-E9-34 "ISC stepper winding" [low_side_out] is wired to NEXUSS3-A-7 "Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-E9-35 ↔ NEXUSS3-A-8OEM-E9-35 "ISC stepper winding" [low_side_out] is wired to NEXUSS3-A-8 "Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-E9-44 ↔ NEXUSS3-C-14OEM-E9-44 "Coolant temperature (THW)" [temp_in] is wired to NEXUSS3-C-14 "AVI 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-E9-45 ↔ NEXUSS3-C-15OEM-E9-45 "Intake air temperature (THA)" [temp_in] is wired to NEXUSS3-C-15 "AVI 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-E9-7 ↔ NEXUSS3-C-4OEM-E9-7 "Crank sensor ground (NE-)" [sensor_ground] is wired to NEXUSS3-C-4 "Home -" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs.
infoUNMAPPEDOEM1 optional OEM pins are not mapped: OEM-E10-16 Tachometer output

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-E10-33Battery-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-E10 33: Battery constant (BATT): Haltech Nexus S3 has no battery-constant input; not needed - OEM-E10 16: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on Haltech Nexus S3

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docECUMASTER: ECU2JZ JZA80 2JZ-GTE adapter technical information (knock sensor count)https://drive.google.com/file/d/15sTEetwLt0aKjuQo6aXODn4EBAkEJrtN/viewarchive2026-10-056a4adabba0f5
4vendor_docHaltech: Nexus S3 Plug 'n' Play adapter QSG (Subaru WRX/STI ADM, HT-186300) — ECU Connector A & C pinouthttps://www.haltech.com/product/ht-186300-nexus-s3-plug-n-play-adapter-harness/archive2026-10-053cab7cd337c2
4vendor_docHaltech: Nexus S3/S2 ECU Overview (QSG) — specificationshttps://store.haltech.com/product/ht-213000-nexus-s3-ecu-only/archive2026-10-05388299668207
4vendor_docLink SupraLink TS2JZX install manual (JZA80 2JZ-GTE non-VVT)https://linkecu.com/documentation/TS2JZX.pdf———
4service_manualToyota FSM P1300 Igniter Circuit (2JZ-GTE) — IGT1-6 / IGF ECM terminalshttp://97supraturbo.com/Trouble%20Codes/P1300%20Ignitor.pdf———