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Lexus LS400 1989-97 (1UZ-FE non-VVTi) → Link G4X StormX 108-4000 (auto)

Lexus LS400 1989-97 (1UZ-FE non-VVTi) — Link — G4X StormX
⚠ 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 errors1: read the Findings page before cutting any wire
Size of the job57 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-1G4XSTORMX-A-A50.85☐☐☐☐☐☐☐
W4OEM-A-22SP-GND-10.85☐☐☐☐☐☐☐
W5OEM-D-13SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-D-26SP-GND-10.85☐☐☐☐☐☐☐
W7SP-GND-1G4XSTORMX-A-A250.85☐☐☐☐☐☐☐
W8SP-GND-1G4XSTORMX-A-A340.85☐☐☐☐☐☐☐
W9SP-GND-1G4XSTORMX-B-B250.85☐☐☐☐☐☐☐
W10SP-GND-1G4XSTORMX-B-B340.85☐☐☐☐☐☐☐
W11OEM-A-18SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-C-15SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-C-16SP-0V-10.5☐☐☐☐☐☐☐
W14SP-0V-1G4XSTORMX-A-A240.5☐☐☐☐☐☐☐
W15SP-0V-1G4XSTORMX-B-B220.5☐☐☐☐☐☐☐
W16OEM-A-11G4XSTORMX-A-A320.5☐☐☐☐☐☐☐
W17OEM-C-8G4XSTORMX-A-A80.5☐☐☐☐☐☐☐
W18OEM-C-7G4XSTORMX-A-A90.5☐☐☐☐☐☐☐
W19OEM-C-6G4XSTORMX-A-A300.5☐☐☐☐☐☐☐
W20OEM-C-3G4XSTORMX-B-B90.5☐☐☐☐☐☐☐
W21OEM-C-11G4XSTORMX-B-B80.5☐☐☐☐☐☐☐
W22OEM-C-5G4XSTORMX-A-A130.5☐☐☐☐☐☐☐
W23OEM-C-13G4XSTORMX-A-A120.5☐☐☐☐☐☐☐
W24OEM-D-12G4XSTORMX-A-A40.5☐☐☐☐☐☐☐
W25OEM-D-11G4XSTORMX-A-A30.5☐☐☐☐☐☐☐
W26OEM-D-24G4XSTORMX-A-A20.5☐☐☐☐☐☐☐
W27OEM-D-25G4XSTORMX-A-A10.5☐☐☐☐☐☐☐
W28OEM-A-4G4XSTORMX-A-A170.5☐☐☐☐☐☐☐
W29OEM-A-5G4XSTORMX-A-A150.5☐☐☐☐☐☐☐
W30OEM-B-4G4XSTORMX-A-A210.5☐☐☐☐☐☐☐
W31OEM-B-6G4XSTORMX-A-A200.5☐☐☐☐☐☐☐
W32OEM-B-7G4XSTORMX-A-A190.5☐☐☐☐☐☐☐
W33OEM-D-19G4XSTORMX-A-A180.5☐☐☐☐☐☐☐
W34OEM-D-20G4XSTORMX-A-A290.5☐☐☐☐☐☐☐
W35OEM-D-17G4XSTORMX-A-A280.5☐☐☐☐☐☐☐
W36OEM-D-8G4XSTORMX-A-A270.5☐☐☐☐☐☐☐
W37OEM-D-7G4XSTORMX-A-A260.5☐☐☐☐☐☐☐
W38OEM-D-6G4XSTORMX-B-B40.5☐☐☐☐☐☐☐
W39OEM-D-5G4XSTORMX-B-B30.5☐☐☐☐☐☐☐
W40OEM-B-5G4XSTORMX-B-B20.5☐☐☐☐☐☐☐
W41OEM-B-8G4XSTORMX-B-B10.5☐☐☐☐☐☐☐
W42OEM-A-17G4XSTORMX-A-A220.5☐☐☐☐☐☐☐
W43OEM-A-6G4XSTORMX-A-A330.5☐☐☐☐☐☐☐
W44OEM-B-11G4XSTORMX-A-A140.5☐☐☐☐☐☐☐
W45OEM-B-24G4XSTORMX-B-B330.5☐☐☐☐☐☐☐
W46OEM-A-16G4XSTORMX-A-A160.5☐☐☐☐☐☐☐
W47OEM-A-7G4XSTORMX-B-B60.5☐☐☐☐☐☐☐
W48OEM-C-2G4XSTORMX-A-A310.5☐☐☐☐☐☐☐
W49OEM-C-10G4XSTORMX-A-A230.5☐☐☐☐☐☐☐
W50OEM-A-19G4XSTORMX-B-B210.5☐☐☐☐☐☐☐
W51OEM-A-9G4XSTORMX-B-B200.5☐☐☐☐☐☐☐
W52OEM-A-20G4XSTORMX-B-B190.5☐☐☐☐☐☐☐
W53OEM-A-14G4XSTORMX-B-B300.5☐☐☐☐☐☐☐
W54OEM-A-2G4XSTORMX-B-B290.5☐☐☐☐☐☐☐
W55OEM-B-19G4XSTORMX-B-B150.5☐☐☐☐☐☐☐
W56OEM-B-20G4XSTORMX-B-B160.5☐☐☐☐☐☐☐
W57OEM-B-23G4XSTORMX-B-B230.5☐☐☐☐☐☐☐

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
1G4XSTORMX-A-A32G4XSTORMX-A-A24open (OL)5 V sensor reference must not touch sensor ground
2G4XSTORMX-A-A32G4XSTORMX-A-A25open (OL)5 V sensor reference must not touch power ground
3G4XSTORMX-A-A5G4XSTORMX-A-A24open (OL)+12 V supply must not touch sensor ground
4G4XSTORMX-A-A5G4XSTORMX-A-A25open (OL)+12 V supply must not touch power ground
5G4XSTORMX-A-A32G4XSTORMX-A-A5open (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

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Schematic

G4XSTORMX-AG4XSTORMX-BOEM-AOEM-BOEM-COEM-DSP-0VSP-14VSP-GND

Connectors

G4XSTORMX-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
A1Injector 4—W27—0.5OEM-D-25———
A10Ignition 4————————
A11Ignition 3————————
A12Ignition 2—W23—0.5OEM-C-13———
A13Ignition 1—W22—0.5OEM-C-5———
A14Analog Volt 4—W44—0.5OEM-B-11———
A15Analog Temp 1—W29—0.5OEM-A-5———
A16Analog Temp 2—W46—0.5OEM-A-16———
A17Analog Volt 1—W28—0.5OEM-A-4———
A18Aux 4—W33—0.5OEM-D-19———
A19Aux 3—W32—0.5OEM-B-7———
A2Injector 3—W26—0.5OEM-D-24———
A20Aux 2—W31—0.5OEM-B-6———
A21Aux 1—W30—0.5OEM-B-4———
A22Analog Volt 2—W42—0.5OEM-A-17———
A23Digital Input 3—W49—0.5OEM-C-10———
A24Sensor Ground—W14—0.5SP-0V-1———
A25System Ground—W7—0.85SP-GND-1———
A26Aux 8—W37—0.5OEM-D-7———
A27Aux 7—W36—0.5OEM-D-8———
A28Aux 6—W35—0.5OEM-D-17———
A29Aux 5—W34—0.5OEM-D-20———
A3Injector 2—W25—0.5OEM-D-11———
A30Digital Input 1—W19—0.5OEM-C-6———
A31Digital Input 2—W48—0.5OEM-C-2———
A32+5V Out—W16—0.5OEM-A-11———
A33Analog Volt 3—W43—0.5OEM-A-6———
A34System Ground—W8—0.85SP-GND-1———
A4Injector 1—W24—0.5OEM-D-12———
A5+14V ECU Power—W3—0.85SP-14V-1———
A6+8V Out————————
A7Shield Ground————————
A8Trigger 1—W17—0.5OEM-C-8———
A9Trigger 2—W18—0.5OEM-C-7———

G4XSTORMX-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
B1Injector 8—W41—0.5OEM-B-8———
B10Ignition 8————————
B11Ignition 7————————
B12Ignition 6————————
B13Ignition 5————————
B15Analog Volt 6—W55—0.5OEM-B-19———
B16Analog Volt 7—W56—0.5OEM-B-20———
B17Shield Ground————————
B19Digital Input 6—W52—0.5OEM-A-20———
B2Injector 7—W40—0.5OEM-B-5———
B20Digital Input 5—W51—0.5OEM-A-9———
B21Digital Input 4—W50—0.5OEM-A-19———
B22Sensor Ground—W15—0.5SP-0V-1———
B23Analog Volt 8—W57—0.5OEM-B-23———
B25System Ground—W9—0.85SP-GND-1———
B27CAN 2 H————————
B28CAN 2 L————————
B29Digital Input 8—W54—0.5OEM-A-2———
B3Injector 6—W39—0.5OEM-D-5———
B30Digital Input 7—W53—0.5OEM-A-14———
B33Analog Volt 5—W45—0.5OEM-B-24———
B34System Ground—W10—0.85SP-GND-1———
B4Injector 5—W38—0.5OEM-D-6———
B6Analog Temp 3—W47—0.5OEM-A-7———
B8Knock 2—W21—0.5OEM-C-11———
B9Knock 1—W20—0.5OEM-C-3———

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition switch (IGSW)————————
11Sensor supply +5V (VC)—W16—0.5G4XSTORMX-A-A32———
12EFI main relay (B+)—W1—0.85SP-14V-1———
13EFI main relay (B1+)—W2—0.85SP-14V-1———
14Neutral start switch (NSW)—W53—0.5G4XSTORMX-B-B30———
16Intake air temperature (THA)—W46—0.5G4XSTORMX-A-A16———
17O2 right front (OXR1)—W42—0.5G4XSTORMX-A-A22———
18Sensor ground (E2)—W11—0.5SP-0V-1———
19Vehicle speed (SPD)—W50—0.5G4XSTORMX-B-B21———
2Starter signal (STA)—W54—0.5G4XSTORMX-B-B29———
20Diagnostic test 2 (TE2)—W52—0.5G4XSTORMX-B-B19———
22Power ground (E1)—W4—0.85SP-GND-1———
4Throttle position (VTA1)—W28—0.5G4XSTORMX-A-A17———
5Coolant temperature (THW)—W29—0.5G4XSTORMX-A-A15———
6O2 left front (OXL1)—W43—0.5G4XSTORMX-A-A33———
7EGR temperature sensor—W47—0.5G4XSTORMX-B-B6———
8Knock/shield (KS)————————
9Diagnostic test 1 (TE1)—W51—0.5G4XSTORMX-B-B20———

OEM-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11O2 right rear (OXR2)—W44—0.5G4XSTORMX-A-A14———
19Stop light switch (BK)—W55—0.5G4XSTORMX-B-B15———
20A/T kickdown switch (KD)—W56—0.5G4XSTORMX-B-B16———
23A/C request (AC)—W57—0.5G4XSTORMX-B-B23———
24O2 left rear (OXL2)—W45—0.5G4XSTORMX-B-B33———
26Battery constant (BATT)————————
4EFI main relay control (MREL)—W30—0.5G4XSTORMX-A-A21———
5Check-engine lamp (W)—W40—0.5G4XSTORMX-B-B2———
6Fuel pump relay (FPR)—W31—0.5G4XSTORMX-A-A20———
7A/C clutch relay (ACMG)—W32—0.5G4XSTORMX-A-A19———
8Fuel pump control (FC)—W41—0.5G4XSTORMX-B-B1———

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1TPS idle switch (IDL)————————
10Igniter 2 feedback (IGF2)—W49—0.5G4XSTORMX-A-A23———
11Knock sensor 2 (KNK2)—W21—0.5G4XSTORMX-B-B8———
12Check connector VF2————————
13Ignition 2 (IGT2)—W23—0.5G4XSTORMX-A-A12———
15Cam sensor ground (G-)—W12—0.5SP-0V-1———
16Crank sensor - (NE-)—W13—0.5SP-0V-1———
2Igniter 1 feedback (IGF1)—W48—0.5G4XSTORMX-A-A31———
3Knock sensor 1 (KNK1)—W20—0.5G4XSTORMX-B-B9———
4Check connector VF1————————
5Ignition 1 (IGT1)—W22—0.5G4XSTORMX-A-A13———
6Cam sensor 2 + (G2+)—W19—0.5G4XSTORMX-A-A30———
7Cam sensor 1 + (G1+)—W18—0.5G4XSTORMX-A-A9———
8Crank sensor + (NE+)—W17—0.5G4XSTORMX-A-A8———

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11Injector 2&8 (#20)—W25—0.5G4XSTORMX-A-A3———
12Injector 1&7 (#10)—W24—0.5G4XSTORMX-A-A4———
13Power ground (E01)—W5—0.85SP-GND-1———
17Cold start injector 1 (STJ1)—W35—0.5G4XSTORMX-A-A28———
19O2 heater 2 (HT2)—W33—0.5G4XSTORMX-A-A18———
20O2 heater 1 (HT1)—W34—0.5G4XSTORMX-A-A29———
21EGR solenoid————————
22Fuel pressure-up VSV (PR)————————
24Injector 3&5 (#40)—W26—0.5G4XSTORMX-A-A2———
25Injector 4&6 (#30)—W27—0.5G4XSTORMX-A-A1———
26Power ground (E02)—W6—0.85SP-GND-1———
4Cold start injector (STJ)————————
5ISC stepper coil 4 (ISC4)—W39—0.5G4XSTORMX-B-B3———
6ISC stepper coil 3 (ISC3)—W38—0.5G4XSTORMX-B-B4———
7ISC stepper coil 2 (ISC2)—W37—0.5G4XSTORMX-A-A26———
8ISC stepper coil 1 (ISC1)—W36—0.5G4XSTORMX-A-A27———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-A-18———
1——W12—0.5OEM-C-15———
1——W13—0.5OEM-C-16———
1——W14—0.5G4XSTORMX-A-A24———
1——W15—0.5G4XSTORMX-B-B22———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-A-12———
1——W2—0.85OEM-A-13———
1——W3—0.85G4XSTORMX-A-A5———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-A-22———
1——W5—0.85OEM-D-13———
1——W6—0.85OEM-D-26———
1——W7—0.85G4XSTORMX-A-A25———
1——W8—0.85G4XSTORMX-A-A34———
1——W9—0.85G4XSTORMX-B-B25———
1——W10—0.85G4XSTORMX-B-B34———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1Ignition switch (IGSW)digital_in———single_source
OEM-A-11Sensor supply +5V (VC)vrefG4XSTORMX-A-A32+5V Outvrefsingle_source
OEM-A-12EFI main relay (B+)power_inG4XSTORMX-A-A5+14V ECU Powerpower_insingle_source
OEM-A-13EFI main relay (B1+)power_inG4XSTORMX-A-A5+14V ECU Powerpower_insingle_source
OEM-A-14Neutral start switch (NSW)digital_inG4XSTORMX-B-B30Digital Input 7digital_insingle_source
OEM-A-16Intake air temperature (THA)temp_inG4XSTORMX-A-A16Analog Temp 2temp_insingle_source
OEM-A-17O2 right front (OXR1)lambda_nb_inG4XSTORMX-A-A22Analog Volt 2analog_insingle_source
OEM-A-18Sensor ground (E2)sensor_groundG4XSTORMX-A-A24 + G4XSTORMX-B-B22Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-A-19Vehicle speed (SPD)digital_inG4XSTORMX-B-B21Digital Input 4digital_insingle_source
OEM-A-2Starter signal (STA)digital_inG4XSTORMX-B-B29Digital Input 8digital_insingle_source
OEM-A-20Diagnostic test 2 (TE2)digital_inG4XSTORMX-B-B19Digital Input 6digital_insingle_source
OEM-A-22Power ground (E1)groundG4XSTORMX-A-A25 + G4XSTORMX-A-A34 + G4XSTORMX-B-B25 + G4XSTORMX-B-B34System Ground + System Ground + System Ground + System Groundgroundsingle_source
OEM-A-4Throttle position (VTA1)analog_inG4XSTORMX-A-A17Analog Volt 1analog_insingle_source
OEM-A-5Coolant temperature (THW)temp_inG4XSTORMX-A-A15Analog Temp 1temp_insingle_source
OEM-A-6O2 left front (OXL1)lambda_nb_inG4XSTORMX-A-A33Analog Volt 3analog_insingle_source
OEM-A-7EGR temperature sensortemp_inG4XSTORMX-B-B6Analog Temp 3temp_insingle_source
OEM-A-8Knock/shield (KS)knock_in———single_source
OEM-A-9Diagnostic test 1 (TE1)digital_inG4XSTORMX-B-B20Digital Input 5digital_insingle_source
OEM-B-11O2 right rear (OXR2)lambda_nb_inG4XSTORMX-A-A14Analog Volt 4analog_insingle_source
OEM-B-19Stop light switch (BK)digital_inG4XSTORMX-B-B15Analog Volt 6analog_insingle_source
OEM-B-20A/T kickdown switch (KD)digital_inG4XSTORMX-B-B16Analog Volt 7analog_insingle_source
OEM-B-23A/C request (AC)digital_inG4XSTORMX-B-B23Analog Volt 8analog_insingle_source
OEM-B-24O2 left rear (OXL2)lambda_nb_inG4XSTORMX-B-B33Analog Volt 5analog_insingle_source
OEM-B-26Battery constant (BATT)power_in———single_source
OEM-B-4EFI main relay control (MREL)low_side_outG4XSTORMX-A-A21Aux 1low_side_outsingle_source
OEM-B-5Check-engine lamp (W)low_side_outG4XSTORMX-B-B2Injector 7injector_outsingle_source
OEM-B-6Fuel pump relay (FPR)low_side_outG4XSTORMX-A-A20Aux 2low_side_outsingle_source
OEM-B-7A/C clutch relay (ACMG)low_side_outG4XSTORMX-A-A19Aux 3low_side_outsingle_source
OEM-B-8Fuel pump control (FC)low_side_outG4XSTORMX-B-B1Injector 8injector_outsingle_source
OEM-C-1TPS idle switch (IDL)digital_in———single_source
OEM-C-10Igniter 2 feedback (IGF2)digital_inG4XSTORMX-A-A23Digital Input 3digital_insingle_source
OEM-C-11Knock sensor 2 (KNK2)knock_inG4XSTORMX-B-B8Knock 2knock_insingle_source
OEM-C-12Check connector VF2analog_out———single_source
OEM-C-13Ignition 2 (IGT2)ignition_outG4XSTORMX-A-A12Ignition 2ignition_outsingle_source
OEM-C-15Cam sensor ground (G-)sensor_groundG4XSTORMX-A-A24 + G4XSTORMX-B-B22Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-C-16Crank sensor - (NE-)sensor_groundG4XSTORMX-A-A24 + G4XSTORMX-B-B22Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-C-2Igniter 1 feedback (IGF1)digital_inG4XSTORMX-A-A31Digital Input 2digital_insingle_source
OEM-C-3Knock sensor 1 (KNK1)knock_inG4XSTORMX-B-B9Knock 1knock_insingle_source
OEM-C-4Check connector VF1analog_out———single_source
OEM-C-5Ignition 1 (IGT1)ignition_outG4XSTORMX-A-A13Ignition 1ignition_outsingle_source
OEM-C-6Cam sensor 2 + (G2+)trigger_inG4XSTORMX-A-A30Digital Input 1digital_insingle_source
OEM-C-7Cam sensor 1 + (G1+)trigger_inG4XSTORMX-A-A9Trigger 2trigger_insingle_source
OEM-C-8Crank sensor + (NE+)trigger_inG4XSTORMX-A-A8Trigger 1trigger_insingle_source
OEM-D-11Injector 2&8 (#20)injector_outG4XSTORMX-A-A3Injector 2injector_outsingle_source
OEM-D-12Injector 1&7 (#10)injector_outG4XSTORMX-A-A4Injector 1injector_outsingle_source
OEM-D-13Power ground (E01)groundG4XSTORMX-A-A25 + G4XSTORMX-A-A34 + G4XSTORMX-B-B25 + G4XSTORMX-B-B34System Ground + System Ground + System Ground + System Groundgroundsingle_source
OEM-D-17Cold start injector 1 (STJ1)low_side_outG4XSTORMX-A-A28Aux 6switch_outsingle_source
OEM-D-19O2 heater 2 (HT2)low_side_outG4XSTORMX-A-A18Aux 4low_side_outsingle_source
OEM-D-20O2 heater 1 (HT1)low_side_outG4XSTORMX-A-A29Aux 5switch_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_outG4XSTORMX-A-A2Injector 3injector_outsingle_source
OEM-D-25Injector 4&6 (#30)injector_outG4XSTORMX-A-A1Injector 4injector_outsingle_source
OEM-D-26Power ground (E02)groundG4XSTORMX-A-A25 + G4XSTORMX-A-A34 + G4XSTORMX-B-B25 + G4XSTORMX-B-B34System Ground + System Ground + System Ground + System Groundgroundsingle_source
OEM-D-4Cold start injector (STJ)low_side_out———single_source
OEM-D-5ISC stepper coil 4 (ISC4)low_side_outG4XSTORMX-B-B3Injector 6injector_outsingle_source
OEM-D-6ISC stepper coil 3 (ISC3)low_side_outG4XSTORMX-B-B4Injector 5injector_outsingle_source
OEM-D-7ISC stepper coil 2 (ISC2)low_side_outG4XSTORMX-A-A26Aux 8switch_outsingle_source
OEM-D-8ISC stepper coil 1 (ISC1)low_side_outG4XSTORMX-A-A27Aux 7switch_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-1G4XSTORMX-A-A50.85no route+14V ECU Power—
W4OEM-A-22SP-GND-10.85no routePower ground (E1)—
W5OEM-D-13SP-GND-10.85no routePower ground (E01)—
W6OEM-D-26SP-GND-10.85no routePower ground (E02)—
W7SP-GND-1G4XSTORMX-A-A250.85no routeSystem Ground—
W8SP-GND-1G4XSTORMX-A-A340.85no routeSystem Ground—
W9SP-GND-1G4XSTORMX-B-B250.85no routeSystem Ground—
W10SP-GND-1G4XSTORMX-B-B340.85no routeSystem Ground—
W11OEM-A-18SP-0V-10.5no routeSensor ground (E2)—
W12OEM-C-15SP-0V-10.5no routeCam sensor ground (G-)—
W13OEM-C-16SP-0V-10.5no routeCrank sensor - (NE-)—
W14SP-0V-1G4XSTORMX-A-A240.5no routeSensor Ground—
W15SP-0V-1G4XSTORMX-B-B220.5no routeSensor Ground—
W16OEM-A-11G4XSTORMX-A-A320.5no routeSensor supply +5V (VC)—
W17OEM-C-8G4XSTORMX-A-A80.5no routeCrank sensor + (NE+)—
W18OEM-C-7G4XSTORMX-A-A90.5no routeCam sensor 1 + (G1+)—
W19OEM-C-6G4XSTORMX-A-A300.5no routeCam sensor 2 + (G2+)—
W20OEM-C-3G4XSTORMX-B-B90.5no routeKnock sensor 1 (KNK1)—
W21OEM-C-11G4XSTORMX-B-B80.5no routeKnock sensor 2 (KNK2)—
W22OEM-C-5G4XSTORMX-A-A130.5no routeIgnition 1 (IGT1)—
W23OEM-C-13G4XSTORMX-A-A120.5no routeIgnition 2 (IGT2)—
W24OEM-D-12G4XSTORMX-A-A40.5no routeInjector 1&7 (#10)—
W25OEM-D-11G4XSTORMX-A-A30.5no routeInjector 2&8 (#20)—
W26OEM-D-24G4XSTORMX-A-A20.5no routeInjector 3&5 (#40)—
W27OEM-D-25G4XSTORMX-A-A10.5no routeInjector 4&6 (#30)—
W28OEM-A-4G4XSTORMX-A-A170.5no routeThrottle position (VTA1)—
W29OEM-A-5G4XSTORMX-A-A150.5no routeCoolant temperature (THW)—
W30OEM-B-4G4XSTORMX-A-A210.5no routeEFI main relay control (MREL)—
W31OEM-B-6G4XSTORMX-A-A200.5no routeFuel pump relay (FPR)—
W32OEM-B-7G4XSTORMX-A-A190.5no routeA/C clutch relay (ACMG)—
W33OEM-D-19G4XSTORMX-A-A180.5no routeO2 heater 2 (HT2)—
W34OEM-D-20G4XSTORMX-A-A290.5no routeO2 heater 1 (HT1)—
W35OEM-D-17G4XSTORMX-A-A280.5no routeCold start injector 1 (STJ1)—
W36OEM-D-8G4XSTORMX-A-A270.5no routeISC stepper coil 1 (ISC1)—
W37OEM-D-7G4XSTORMX-A-A260.5no routeISC stepper coil 2 (ISC2)—
W38OEM-D-6G4XSTORMX-B-B40.5no routeISC stepper coil 3 (ISC3)—
W39OEM-D-5G4XSTORMX-B-B30.5no routeISC stepper coil 4 (ISC4)—
W40OEM-B-5G4XSTORMX-B-B20.5no routeCheck-engine lamp (W)—
W41OEM-B-8G4XSTORMX-B-B10.5no routeFuel pump control (FC)—
W42OEM-A-17G4XSTORMX-A-A220.5no routeO2 right front (OXR1)—
W43OEM-A-6G4XSTORMX-A-A330.5no routeO2 left front (OXL1)—
W44OEM-B-11G4XSTORMX-A-A140.5no routeO2 right rear (OXR2)—
W45OEM-B-24G4XSTORMX-B-B330.5no routeO2 left rear (OXL2)—
W46OEM-A-16G4XSTORMX-A-A160.5no routeIntake air temperature (THA)—
W47OEM-A-7G4XSTORMX-B-B60.5no routeEGR temperature sensor—
W48OEM-C-2G4XSTORMX-A-A310.5no routeIgniter 1 feedback (IGF1)—
W49OEM-C-10G4XSTORMX-A-A230.5no routeIgniter 2 feedback (IGF2)—
W50OEM-A-19G4XSTORMX-B-B210.5no routeVehicle speed (SPD)—
W51OEM-A-9G4XSTORMX-B-B200.5no routeDiagnostic test 1 (TE1)—
W52OEM-A-20G4XSTORMX-B-B190.5no routeDiagnostic test 2 (TE2)—
W53OEM-A-14G4XSTORMX-B-B300.5no routeNeutral start switch (NSW)—
W54OEM-A-2G4XSTORMX-B-B290.5no routeStarter signal (STA)—
W55OEM-B-19G4XSTORMX-B-B150.5no routeStop light switch (BK)—
W56OEM-B-20G4XSTORMX-B-B160.5no routeA/T kickdown switch (KD)—
W57OEM-B-23G4XSTORMX-B-B230.5no routeA/C request (AC)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (17)

SeverityCodeSubjectMessage
errorREQUIRED_UNMAPPEDOEM-A-1Required OEM function "Ignition switch (IGSW)" (digital_in) is not connected to the new ECU.
warnLOAD_UNKNOWNG4XSTORMX-A-A19G4XSTORMX-A-A19 "Aux 3" drives OEM-B-7 A/C clutch relay (ACMG) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNG4XSTORMX-A-A20G4XSTORMX-A-A20 "Aux 2" drives OEM-B-6 Fuel pump relay (FPR) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNG4XSTORMX-A-A21G4XSTORMX-A-A21 "Aux 1" drives OEM-B-4 EFI main relay control (MREL) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnNET_FAMILYOEM-B-19 ↔ G4XSTORMX-B-B15OEM-B-19 "Stop light switch (BK)" [digital_in] is wired to G4XSTORMX-B-B15 "Analog Volt 6" [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-B-20 ↔ G4XSTORMX-B-B16OEM-B-20 "A/T kickdown switch (KD)" [digital_in] is wired to G4XSTORMX-B-B16 "Analog Volt 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.
warnNET_FAMILYOEM-B-23 ↔ G4XSTORMX-B-B23OEM-B-23 "A/C request (AC)" [digital_in] is wired to G4XSTORMX-B-B23 "Analog Volt 8" [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 ↔ G4XSTORMX-A-A30OEM-C-6 "Cam sensor 2 + (G2+)" [trigger_in] is wired to G4XSTORMX-A-A30 "Digital Input 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
infoNET_FAMILYOEM-B-5 ↔ G4XSTORMX-B-B2OEM-B-5 "Check-engine lamp (W)" [low_side_out] is wired to G4XSTORMX-B-B2 "Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-B-8 ↔ G4XSTORMX-B-B1OEM-B-8 "Fuel pump control (FC)" [low_side_out] is wired to G4XSTORMX-B-B1 "Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-17 ↔ G4XSTORMX-A-A28OEM-D-17 "Cold start injector 1 (STJ1)" [low_side_out] is wired to G4XSTORMX-A-A28 "Aux 6" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-D-20 ↔ G4XSTORMX-A-A29OEM-D-20 "O2 heater 1 (HT1)" [low_side_out] is wired to G4XSTORMX-A-A29 "Aux 5" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-D-5 ↔ G4XSTORMX-B-B3OEM-D-5 "ISC stepper coil 4 (ISC4)" [low_side_out] is wired to G4XSTORMX-B-B3 "Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-6 ↔ G4XSTORMX-B-B4OEM-D-6 "ISC stepper coil 3 (ISC3)" [low_side_out] is wired to G4XSTORMX-B-B4 "Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-7 ↔ G4XSTORMX-A-A26OEM-D-7 "ISC stepper coil 2 (ISC2)" [low_side_out] is wired to G4XSTORMX-A-A26 "Aux 8" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-D-8 ↔ G4XSTORMX-A-A27OEM-D-8 "ISC stepper coil 1 (ISC1)" [low_side_out] is wired to G4XSTORMX-A-A27 "Aux 7" [switch_out]. Configure this output as low side.
infoUNMAPPEDOEM7 optional OEM pins are not mapped: OEM-A-8 Knock/shield (KS); OEM-C-1 TPS idle switch (IDL); 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

Fit check: unconfirmed. Confirm these before building: - Trigger pattern for Toyota 1UZ-FE not found in the ECU's docs (Link's trigger-mode list is only inside PCLink, not online) 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-A 1: Ignition switch (IGSW): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); Link G4X StormX has no dedicated key-on input Not wired: - OEM-B 26: Battery constant (BATT): Link G4X StormX has no battery-constant input; not needed - OEM-A 8: Knock/shield (KS): no free knock input on Link G4X StormX - OEM-D 21: EGR solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X StormX - OEM-D 22: Fuel pressure-up VSV (PR): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X StormX - OEM-D 4: Cold start injector (STJ): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X StormX - OEM-C 1: TPS idle switch (IDL): no free switch_in/frequency_in/analog_0_5 on Link G4X StormX - OEM-C 4: Check connector VF1: no free analog_out on Link G4X StormX - OEM-C 12: Check connector VF2: no free analog_out on Link G4X StormX

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docLink: G4X StormX quickstart guidehttps://linkecu.com/documentation/StormXQuickstartGuide.pdf———
3community_copyYourSpec: Link G4X StormX flying-lead harness wiring listhttps://wpm.yourspec.com/projects/view/1482———
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/———