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Toyota Mark II JZX90 1992-96 (1JZ-GTE, non-VVT) → Link G4X AtomX 111-4000 (auto)

Toyota Mark II JZX90 1992-96 (1JZ-GTE, non-VVT) — Link — G4X AtomX
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 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.

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 job37 wires · 8 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-C86-22SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-C86-23SP-14V-10.85☐☐☐☐☐☐☐
W3SP-14V-1G4XATOMX-A-A50.85☐☐☐☐☐☐☐
W4OEM-C85-16SP-GND-10.85☐☐☐☐☐☐☐
W5OEM-C88-28SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-C88-33SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-C88-34SP-GND-10.85☐☐☐☐☐☐☐
W8SP-GND-1G4XATOMX-A-A250.85☐☐☐☐☐☐☐
W9SP-GND-1G4XATOMX-A-A340.85☐☐☐☐☐☐☐
W10OEM-C84-11SP-0V-10.5☐☐☐☐☐☐☐
W11OEM-C84-17SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-C84-22SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-C84-6SP-0V-10.5☐☐☐☐☐☐☐
W14SP-0V-1G4XATOMX-A-A240.5☐☐☐☐☐☐☐
W15OEM-C84-1G4XATOMX-A-A320.5☐☐☐☐☐☐☐
W16OEM-C84-5G4XATOMX-A-A80.5☐☐☐☐☐☐☐
W17OEM-C84-10G4XATOMX-A-A90.5☐☐☐☐☐☐☐
W18OEM-C84-16G4XATOMX-A-A300.5☐☐☐☐☐☐☐
W19OEM-C88-5G4XATOMX-A-A60.5☐☐☐☐☐☐☐
W20OEM-C88-24G4XATOMX-A-A130.5☐☐☐☐☐☐☐
W21OEM-C88-16G4XATOMX-A-A120.5☐☐☐☐☐☐☐
W22OEM-C88-15G4XATOMX-A-A110.5☐☐☐☐☐☐☐
W23OEM-C88-26G4XATOMX-A-A100.5☐☐☐☐☐☐☐
W24OEM-C88-10G4XATOMX-A-A40.5☐☐☐☐☐☐☐
W25OEM-C88-9G4XATOMX-A-A30.5☐☐☐☐☐☐☐
W26OEM-C88-8G4XATOMX-A-A20.5☐☐☐☐☐☐☐
W27OEM-C84-8G4XATOMX-A-A170.5☐☐☐☐☐☐☐
W28OEM-C84-7G4XATOMX-A-A220.5☐☐☐☐☐☐☐
W29OEM-C84-20G4XATOMX-A-A150.5☐☐☐☐☐☐☐
W30OEM-C85-2G4XATOMX-A-A210.5☐☐☐☐☐☐☐
W31OEM-C86-5G4XATOMX-A-A200.5☐☐☐☐☐☐☐
W32OEM-C88-3G4XATOMX-A-A190.5☐☐☐☐☐☐☐
W33OEM-C88-11G4XATOMX-A-A180.5☐☐☐☐☐☐☐
W34OEM-C88-23G4XATOMX-A-A10.5☐☐☐☐☐☐☐
W35OEM-C84-12G4XATOMX-A-A330.5☐☐☐☐☐☐☐
W36OEM-C84-14G4XATOMX-A-A160.5☐☐☐☐☐☐☐
W37OEM-C86-12G4XATOMX-A-A310.5☐☐☐☐☐☐☐

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
1G4XATOMX-A-A32G4XATOMX-A-A24open (OL)5 V sensor reference must not touch sensor ground
2G4XATOMX-A-A24G4XATOMX-A-A5open (OL)sensor ground must not touch +12 V supply
3G4XATOMX-A-A25G4XATOMX-A-A32open (OL)power ground must not touch 5 V sensor reference
4G4XATOMX-A-A25G4XATOMX-A-A5open (OL)power ground must not touch +12 V supply
5G4XATOMX-A-A32G4XATOMX-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

G4XATOMX-AOEM-C84OEM-C85OEM-C86OEM-C88SP-0VSP-14VSP-GND

Connectors

G4XATOMX-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
A1Injector 4—W34—0.5OEM-C88-23———
A10Ignition 4—W23—0.5OEM-C88-26———
A11Ignition 3—W22—0.5OEM-C88-15———
A12Ignition 2—W21—0.5OEM-C88-16———
A13Ignition 1—W20—0.5OEM-C88-24———
A15Analog Temp 1—W29—0.5OEM-C84-20———
A16Analog Temp 2—W36—0.5OEM-C84-14———
A17Analog Volt 1—W27—0.5OEM-C84-8———
A18Aux 4—W33—0.5OEM-C88-11———
A19Aux 3—W32—0.5OEM-C88-3———
A2Injector 3—W26—0.5OEM-C88-8———
A20Aux 2—W31—0.5OEM-C86-5———
A21Aux 1—W30—0.5OEM-C85-2———
A22Analog Volt 2—W28—0.5OEM-C84-7———
A24Sensor Ground—W14—0.5SP-0V-1———
A25System Ground—W8—0.85SP-GND-1———
A28CAN H————————
A29CAN L————————
A3Injector 2—W25—0.5OEM-C88-9———
A30Digital Input 1—W18—0.5OEM-C84-16———
A31Digital Input 2—W37—0.5OEM-C86-12———
A32+5V Out—W15—0.5OEM-C84-1———
A33Analog Volt 3—W35—0.5OEM-C84-12———
A34System Ground—W9—0.85SP-GND-1———
A4Injector 1—W24—0.5OEM-C88-10———
A5+14V ECU Power—W3—0.85SP-14V-1———
A6Knock 1—W19—0.5OEM-C88-5———
A7Shield Ground————————
A8Trigger 1—W16—0.5OEM-C84-5———
A9Trigger 2—W17—0.5OEM-C84-10———

OEM-C84

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Sensor supply +5V (VCC)—W15—0.5G4XATOMX-A-A32———
10Cam position 1 (G1)—W17—0.5G4XATOMX-A-A9———
11Cam 1 return (G1-)—W10—0.5SP-0V-1———
12TRAC throttle position (VTA2)—W35—0.5G4XATOMX-A-A33———
13O2 sensor (OX1)————————
14Intake air temperature (THA)—W36—0.5G4XATOMX-A-A16———
15OD direct-clutch speed sensor (NCO+)————————
16Cam position 2 (G2)—W18—0.5G4XATOMX-A-A30———
17Cam 2 return (G2-)—W11—0.5SP-0V-1———
20Coolant temperature (THW)—W29—0.5G4XATOMX-A-A15———
22Sensor ground (E2)—W12—0.5SP-0V-1———
3OD direct-clutch speed sensor (NCO-)————————
4No.2 speed sensor (SP2-)————————
5Crank position (NE)—W16—0.5G4XATOMX-A-A8———
6Crank sensor return (NE-)—W13—0.5SP-0V-1———
7Throttle position (VTA1)—W28—0.5G4XATOMX-A-A22———
8Manifold pressure (PIM)—W27—0.5G4XATOMX-A-A17———
9No.2 speed sensor (SP2+)————————

OEM-C85

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Slave engine speed (NEO)————————
10Fuel pump diagnostic (DI)————————
11Slave TRAC throttle position (VTO2)————————
14ABS active (MT only)————————
16Power ground (E1)—W4—0.85SP-GND-1———
2EFI main relay control (M-REL)—W30—0.5G4XATOMX-A-A21———
3Check-engine lamp (W)————————
4Fuel pump control (FPC)————————
5Diagnostic test 1 (TE1)————————
6Timing retard (TR)————————
7Slave throttle position (VTO1)————————

OEM-C86

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Diagnostic test terminal (TT)————————
10A/T 2nd-gear indicator (2)————————
11Diagnostic test 2 (TE2)————————
12No.1 speed sensor (SP1)—W37—0.5G4XATOMX-A-A31———
13Cat temperature sensor (CCO)————————
14Battery constant (BATT)————————
17A/T throttle position (L3)————————
18A/T throttle position (L2)————————
19A/T throttle position (L1)————————
2A/T low-gear indicator (L)————————
20A/C request (A/C)————————
22EFI main relay power (+B)—W1—0.85SP-14V-1———
23EFI main relay power (+B1)—W2—0.85SP-14V-1———
25Stop light switch (STP)————————
28Electrical load sense (ELS)————————
3A/T power/normal mode (P)————————
5A/C clutch relay (ACMG)—W31—0.5G4XATOMX-A-A20———
6A/T overdrive disable 2 (OD2)————————
7A/T overdrive disable 1 (OD1)————————
8Cat temp warning light (EGW)————————
9Ignition switch (IGSW)————————

OEM-C88

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Injector 1 (#10, cyl 1&4)—W24—0.5G4XATOMX-A-A4———
11A/T shift solenoid 1 (S1)—W33—0.5G4XATOMX-A-A18———
12Igniter feedback (IGF)————————
13Starter signal (STA)————————
14Neutral/park switch (NSW)————————
15Ignition 3 (IGT3)—W22—0.5G4XATOMX-A-A11———
16Ignition 2 (IGT2)—W21—0.5G4XATOMX-A-A12———
17A/T shift solenoid 2 (S2)————————
19Voltage feedback (VF)————————
20ISC stepper coil 4 (ISCV4)————————
21ISC stepper coil 3 (ISCV3)————————
22ISC stepper coil 2 (ISCV2)————————
23ISC stepper coil 1 (ISCV1)—W34—0.5G4XATOMX-A-A1———
24Ignition 1 (IGT1)—W20—0.5G4XATOMX-A-A13———
26Ignition 4 (IGT4)—W23—0.5G4XATOMX-A-A10———
27A/T lock-up solenoid (S3)————————
28Power ground (E11)—W5—0.85SP-GND-1———
29Ignition 6 (IGT6)————————
3O2 heater (HT)—W32—0.5G4XATOMX-A-A19———
30Ignition 5 (IGT5)————————
31TRAC throttle idle switch (IDL2)————————
32TPS idle switch (IDL1)————————
33Power ground (E02)—W6—0.85SP-GND-1———
34Power ground (E01)—W7—0.85SP-GND-1———
4Knock sensor 2 (KNK2, rear)————————
5Knock sensor 1 (KNK1, front)—W19—0.5G4XATOMX-A-A6———
7EVAP purge VSV————————
8Injector 3 (#30, cyl 2&6)—W26—0.5G4XATOMX-A-A2———
9Injector 2 (#20, cyl 3&5)—W25—0.5G4XATOMX-A-A3———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W10—0.5OEM-C84-11———
1——W11—0.5OEM-C84-17———
1——W12—0.5OEM-C84-22———
1——W13—0.5OEM-C84-6———
1——W14—0.5G4XATOMX-A-A24———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-C86-22———
1——W2—0.85OEM-C86-23———
1——W3—0.85G4XATOMX-A-A5———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-C85-16———
1——W5—0.85OEM-C88-28———
1——W6—0.85OEM-C88-33———
1——W7—0.85OEM-C88-34———
1——W8—0.85G4XATOMX-A-A25———
1——W9—0.85G4XATOMX-A-A34———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-C84-1Sensor supply +5V (VCC)vrefG4XATOMX-A-A32+5V Outvrefsingle_source
OEM-C84-10Cam position 1 (G1)trigger_inG4XATOMX-A-A9Trigger 2trigger_insingle_source
OEM-C84-11Cam 1 return (G1-)sensor_groundG4XATOMX-A-A24Sensor Groundsensor_groundsingle_source
OEM-C84-12TRAC throttle position (VTA2)analog_inG4XATOMX-A-A33Analog Volt 3analog_insingle_source
OEM-C84-13O2 sensor (OX1)lambda_nb_in———single_source
OEM-C84-14Intake air temperature (THA)temp_inG4XATOMX-A-A16Analog Temp 2temp_insingle_source
OEM-C84-15OD direct-clutch speed sensor (NCO+)digital_in———single_source
OEM-C84-16Cam position 2 (G2)trigger_inG4XATOMX-A-A30Digital Input 1digital_insingle_source
OEM-C84-17Cam 2 return (G2-)sensor_groundG4XATOMX-A-A24Sensor Groundsensor_groundsingle_source
OEM-C84-20Coolant temperature (THW)temp_inG4XATOMX-A-A15Analog Temp 1temp_insingle_source
OEM-C84-22Sensor ground (E2)sensor_groundG4XATOMX-A-A24Sensor Groundsensor_groundsingle_source
OEM-C84-3OD direct-clutch speed sensor (NCO-)digital_in———single_source
OEM-C84-4No.2 speed sensor (SP2-)digital_in———single_source
OEM-C84-5Crank position (NE)trigger_inG4XATOMX-A-A8Trigger 1trigger_insingle_source
OEM-C84-6Crank sensor return (NE-)sensor_groundG4XATOMX-A-A24Sensor Groundsensor_groundsingle_source
OEM-C84-7Throttle position (VTA1)analog_inG4XATOMX-A-A22Analog Volt 2analog_insingle_source
OEM-C84-8Manifold pressure (PIM)analog_inG4XATOMX-A-A17Analog Volt 1analog_insingle_source
OEM-C84-9No.2 speed sensor (SP2+)digital_in———single_source
OEM-C85-1Slave engine speed (NEO)digital_in———single_source
OEM-C85-10Fuel pump diagnostic (DI)digital_in———single_source
OEM-C85-11Slave TRAC throttle position (VTO2)analog_out———single_source
OEM-C85-14ABS active (MT only)digital_in———single_source
OEM-C85-16Power ground (E1)groundG4XATOMX-A-A25 + G4XATOMX-A-A34System Ground + System Groundgroundsingle_source
OEM-C85-2EFI main relay control (M-REL)low_side_outG4XATOMX-A-A21Aux 1low_side_outsingle_source
OEM-C85-3Check-engine lamp (W)low_side_out———single_source
OEM-C85-4Fuel pump control (FPC)low_side_out———single_source
OEM-C85-5Diagnostic test 1 (TE1)digital_in———single_source
OEM-C85-6Timing retard (TR)digital_in———single_source
OEM-C85-7Slave throttle position (VTO1)analog_out———single_source
OEM-C86-1Diagnostic test terminal (TT)digital_in———single_source
OEM-C86-10A/T 2nd-gear indicator (2)digital_in———single_source
OEM-C86-11Diagnostic test 2 (TE2)digital_in———single_source
OEM-C86-12No.1 speed sensor (SP1)digital_inG4XATOMX-A-A31Digital Input 2digital_insingle_source
OEM-C86-13Cat temperature sensor (CCO)temp_in———single_source
OEM-C86-14Battery constant (BATT)power_in———single_source
OEM-C86-17A/T throttle position (L3)digital_in———single_source
OEM-C86-18A/T throttle position (L2)digital_in———single_source
OEM-C86-19A/T throttle position (L1)digital_in———single_source
OEM-C86-2A/T low-gear indicator (L)digital_in———single_source
OEM-C86-20A/C request (A/C)digital_in———single_source
OEM-C86-22EFI main relay power (+B)power_inG4XATOMX-A-A5+14V ECU Powerpower_insingle_source
OEM-C86-23EFI main relay power (+B1)power_inG4XATOMX-A-A5+14V ECU Powerpower_insingle_source
OEM-C86-25Stop light switch (STP)digital_in———single_source
OEM-C86-28Electrical load sense (ELS)digital_in———single_source
OEM-C86-3A/T power/normal mode (P)digital_in———single_source
OEM-C86-5A/C clutch relay (ACMG)low_side_outG4XATOMX-A-A20Aux 2low_side_outsingle_source
OEM-C86-6A/T overdrive disable 2 (OD2)digital_in———single_source
OEM-C86-7A/T overdrive disable 1 (OD1)digital_in———single_source
OEM-C86-8Cat temp warning light (EGW)low_side_out———single_source
OEM-C86-9Ignition switch (IGSW)digital_in———single_source
OEM-C88-10Injector 1 (#10, cyl 1&4)injector_outG4XATOMX-A-A4Injector 1injector_outsingle_source
OEM-C88-11A/T shift solenoid 1 (S1)low_side_outG4XATOMX-A-A18Aux 4low_side_outsingle_source
OEM-C88-12Igniter feedback (IGF)digital_in———single_source
OEM-C88-13Starter signal (STA)digital_in———single_source
OEM-C88-14Neutral/park switch (NSW)digital_in———single_source
OEM-C88-15Ignition 3 (IGT3)ignition_outG4XATOMX-A-A11Ignition 3ignition_outsingle_source
OEM-C88-16Ignition 2 (IGT2)ignition_outG4XATOMX-A-A12Ignition 2ignition_outsingle_source
OEM-C88-17A/T shift solenoid 2 (S2)low_side_out———single_source
OEM-C88-19Voltage feedback (VF)analog_out———single_source
OEM-C88-20ISC stepper coil 4 (ISCV4)low_side_out———single_source
OEM-C88-21ISC stepper coil 3 (ISCV3)low_side_out———single_source
OEM-C88-22ISC stepper coil 2 (ISCV2)low_side_out———single_source
OEM-C88-23ISC stepper coil 1 (ISCV1)low_side_outG4XATOMX-A-A1Injector 4injector_outsingle_source
OEM-C88-24Ignition 1 (IGT1)ignition_outG4XATOMX-A-A13Ignition 1ignition_outsingle_source
OEM-C88-26Ignition 4 (IGT4)ignition_outG4XATOMX-A-A10Ignition 4ignition_outsingle_source
OEM-C88-27A/T lock-up solenoid (S3)low_side_out———single_source
OEM-C88-28Power ground (E11)groundG4XATOMX-A-A25 + G4XATOMX-A-A34System Ground + System Groundgroundsingle_source
OEM-C88-29Ignition 6 (IGT6)ignition_out———single_source
OEM-C88-3O2 heater (HT)low_side_outG4XATOMX-A-A19Aux 3low_side_outsingle_source
OEM-C88-30Ignition 5 (IGT5)ignition_out———single_source
OEM-C88-31TRAC throttle idle switch (IDL2)digital_in———single_source
OEM-C88-32TPS idle switch (IDL1)digital_in———single_source
OEM-C88-33Power ground (E02)groundG4XATOMX-A-A25 + G4XATOMX-A-A34System Ground + System Groundgroundsingle_source
OEM-C88-34Power ground (E01)groundG4XATOMX-A-A25 + G4XATOMX-A-A34System Ground + System Groundgroundsingle_source
OEM-C88-4Knock sensor 2 (KNK2, rear)knock_in———single_source
OEM-C88-5Knock sensor 1 (KNK1, front)knock_inG4XATOMX-A-A6Knock 1knock_insingle_source
OEM-C88-7EVAP purge VSVlow_side_out———single_source
OEM-C88-8Injector 3 (#30, cyl 2&6)injector_outG4XATOMX-A-A2Injector 3injector_outsingle_source
OEM-C88-9Injector 2 (#20, cyl 3&5)injector_outG4XATOMX-A-A3Injector 2injector_outsingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-C86-22SP-14V-10.85no routeEFI main relay power (+B)—
W2OEM-C86-23SP-14V-10.85no routeEFI main relay power (+B1)—
W3SP-14V-1G4XATOMX-A-A50.85no route+14V ECU Power—
W4OEM-C85-16SP-GND-10.85no routePower ground (E1)—
W5OEM-C88-28SP-GND-10.85no routePower ground (E11)—
W6OEM-C88-33SP-GND-10.85no routePower ground (E02)—
W7OEM-C88-34SP-GND-10.85no routePower ground (E01)—
W8SP-GND-1G4XATOMX-A-A250.85no routeSystem Ground—
W9SP-GND-1G4XATOMX-A-A340.85no routeSystem Ground—
W10OEM-C84-11SP-0V-10.5no routeCam 1 return (G1-)—
W11OEM-C84-17SP-0V-10.5no routeCam 2 return (G2-)—
W12OEM-C84-22SP-0V-10.5no routeSensor ground (E2)—
W13OEM-C84-6SP-0V-10.5no routeCrank sensor return (NE-)—
W14SP-0V-1G4XATOMX-A-A240.5no routeSensor Ground—
W15OEM-C84-1G4XATOMX-A-A320.5no routeSensor supply +5V (VCC)—
W16OEM-C84-5G4XATOMX-A-A80.5no routeCrank position (NE)—
W17OEM-C84-10G4XATOMX-A-A90.5no routeCam position 1 (G1)—
W18OEM-C84-16G4XATOMX-A-A300.5no routeCam position 2 (G2)—
W19OEM-C88-5G4XATOMX-A-A60.5no routeKnock sensor 1 (KNK1, front)—
W20OEM-C88-24G4XATOMX-A-A130.5no routeIgnition 1 (IGT1)—
W21OEM-C88-16G4XATOMX-A-A120.5no routeIgnition 2 (IGT2)—
W22OEM-C88-15G4XATOMX-A-A110.5no routeIgnition 3 (IGT3)—
W23OEM-C88-26G4XATOMX-A-A100.5no routeIgnition 4 (IGT4)—
W24OEM-C88-10G4XATOMX-A-A40.5no routeInjector 1 (#10, cyl 1&4)—
W25OEM-C88-9G4XATOMX-A-A30.5no routeInjector 2 (#20, cyl 3&5)—
W26OEM-C88-8G4XATOMX-A-A20.5no routeInjector 3 (#30, cyl 2&6)—
W27OEM-C84-8G4XATOMX-A-A170.5no routeManifold pressure (PIM)—
W28OEM-C84-7G4XATOMX-A-A220.5no routeThrottle position (VTA1)—
W29OEM-C84-20G4XATOMX-A-A150.5no routeCoolant temperature (THW)—
W30OEM-C85-2G4XATOMX-A-A210.5no routeEFI main relay control (M-REL)—
W31OEM-C86-5G4XATOMX-A-A200.5no routeA/C clutch relay (ACMG)—
W32OEM-C88-3G4XATOMX-A-A190.5no routeO2 heater (HT)—
W33OEM-C88-11G4XATOMX-A-A180.5no routeA/T shift solenoid 1 (S1)—
W34OEM-C88-23G4XATOMX-A-A10.5no routeISC stepper coil 1 (ISCV1)—
W35OEM-C84-12G4XATOMX-A-A330.5no routeTRAC throttle position (VTA2)—
W36OEM-C84-14G4XATOMX-A-A160.5no routeIntake air temperature (THA)—
W37OEM-C86-12G4XATOMX-A-A310.5no routeNo.1 speed sensor (SP1)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (10)

SeverityCodeSubjectMessage
errorINJECTOR_BALLASTG4X AtomXThe 1JZ-GTE injectors (1JZ-GTE fuel injector) are low-impedance, but G4X AtomX drives saturated (high-Z) injectors only. Add a ballast resistor pack in series with each injector, or use an ECU with low-Z / peak-and-hold injector drivers.
errorREQUIRED_UNMAPPEDOEM-C86-9Required OEM function "Ignition switch (IGSW)" (digital_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-C88-29Required OEM function "Ignition 6 (IGT6)" (ignition_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-C88-30Required OEM function "Ignition 5 (IGT5)" (ignition_out) is not connected to the new ECU.
warnLOAD_UNKNOWNG4XATOMX-A-A20G4XATOMX-A-A20 "Aux 2" drives OEM-C86-5 A/C clutch relay (ACMG) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNG4XATOMX-A-A21G4XATOMX-A-A21 "Aux 1" drives OEM-C85-2 EFI main relay control (M-REL) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnNET_FAMILYOEM-C84-16 ↔ G4XATOMX-A-A30OEM-C84-16 "Cam position 2 (G2)" [trigger_in] is wired to G4XATOMX-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.
warnNO_FUEL_PUMPfuel pumpThis engine harness has no fuel-pump control path: no fuel-pump relay output is wired to the new ECU. If the stock car switches the pump outside the ECU (an airflow-meter contact or a separate module), the standalone must drive the pump relay itself — see the install notes for this car.
infoNET_FAMILYOEM-C88-23 ↔ G4XATOMX-A-A1OEM-C88-23 "ISC stepper coil 1 (ISCV1)" [low_side_out] is wired to G4XATOMX-A-A1 "Injector 4" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoUNMAPPEDOEM42 optional OEM pins are not mapped: OEM-C84-13 O2 sensor (OX1); OEM-C84-15 OD direct-clutch speed sensor (NCO+); OEM-C84-3 OD direct-clutch speed sensor (NCO-); OEM-C84-4 No.2 speed sensor (SP2-); OEM-C84-9 No.2 speed sensor (SP2+); OEM-C85-1 Slave engine speed (NEO); OEM-C85-10 Fuel pump diagnostic (DI); OEM-C85-11 Slave TRAC throttle position (VTO2); OEM-C85-14 ABS active (MT only); OEM-C85-3 Check-engine lamp (W); OEM-C85-4 Fuel pump control (FPC); OEM-C85-5 Diagnostic test 1 (TE1); OEM-C85-6 Timing retard (TR); OEM-C85-7 Slave throttle position (VTO1); OEM-C86-1 Diagnostic test terminal (TT); OEM-C86-10 A/T 2nd-gear indicator (2); OEM-C86-11 Diagnostic test 2 (TE2); OEM-C86-13 Cat temperature sensor (CCO); OEM-C86-17 A/T throttle position (L3); OEM-C86-18 A/T throttle position (L2); OEM-C86-19 A/T throttle position (L1); OEM-C86-2 A/T low-gear indicator (L); OEM-C86-20 A/C request (A/C); OEM-C86-25 Stop light switch (STP); OEM-C86-28 Electrical load sense (ELS); OEM-C86-3 A/T power/normal mode (P); OEM-C86-6 A/T overdrive disable 2 (OD2); OEM-C86-7 A/T overdrive disable 1 (OD1); OEM-C86-8 Cat temp warning light (EGW); OEM-C88-12 Igniter feedback (IGF); OEM-C88-13 Starter signal (STA); OEM-C88-14 Neutral/park switch (NSW); OEM-C88-17 A/T shift solenoid 2 (S2); OEM-C88-19 Voltage feedback (VF); OEM-C88-20 ISC stepper coil 4 (ISCV4); OEM-C88-21 ISC stepper coil 3 (ISCV3); OEM-C88-22 ISC stepper coil 2 (ISCV2); OEM-C88-27 A/T lock-up solenoid (S3); OEM-C88-31 TRAC throttle idle switch (IDL2); OEM-C88-32 TPS idle switch (IDL1); OEM-C88-4 Knock sensor 2 (KNK2, rear); OEM-C88-7 EVAP purge VSV

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-C86-14Battery-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-C88 30: Ignition 5 (IGT5): no free ignition output on Link G4X AtomX - OEM-C88 29: Ignition 6 (IGT6): no free ignition output on Link G4X AtomX - OEM-C86 9: 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 AtomX has no dedicated key-on input Not wired: - OEM-C86 14: Battery constant (BATT): Link G4X AtomX has no battery-constant input; not needed - OEM-C88 4: Knock sensor 2 (KNK2, rear): no free knock input on Link G4X AtomX - OEM-C88 17: A/T shift solenoid 2 (S2): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C88 22: ISC stepper coil 2 (ISCV2): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C88 21: ISC stepper coil 3 (ISCV3): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C88 20: ISC stepper coil 4 (ISCV4): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C85 3: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C85 4: Fuel pump control (FPC): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C86 8: Cat temp warning light (EGW): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C88 27: A/T lock-up solenoid (S3): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C88 7: EVAP purge VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X AtomX - OEM-C84 13: O2 sensor (OX1): no free o2_narrowband/analog_0_5 on Link G4X AtomX - OEM-C86 13: Cat temperature sensor (CCO): no free thermistor/analog_0_5 on Link G4X AtomX - OEM-C84 4: No.2 speed sensor (SP2-): no free frequency_in/switch_in on Link G4X AtomX - OEM-C84 9: No.2 speed sensor (SP2+): no free frequency_in/switch_in on Link G4X AtomX - OEM-C84 15: OD direct-clutch speed sensor (NCO+): no free frequency_in/switch_in on Link G4X AtomX - OEM-C84 3: OD direct-clutch speed sensor (NCO-): no free frequency_in/switch_in on Link G4X AtomX - OEM-C85 1: Slave engine speed (NEO): no free frequency_in/switch_in on Link G4X AtomX - OEM-C85 10: Fuel pump diagnostic (DI): no free frequency_in/switch_in on Link G4X AtomX - OEM-C88 12: Igniter feedback (IGF): no free frequency_in/switch_in on Link G4X AtomX - OEM-C85 5: Diagnostic test 1 (TE1): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 7: A/T overdrive disable 1 (OD1): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 10: A/T 2nd-gear indicator (2): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 11: Diagnostic test 2 (TE2): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 6: A/T overdrive disable 2 (OD2): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C85 14: ABS active (MT only): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C85 6: Timing retard (TR): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 1: Diagnostic test terminal (TT): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 17: A/T throttle position (L3): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 18: A/T throttle position (L2): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 19: A/T throttle position (L1): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 2: A/T low-gear indicator (L): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 20: A/C request (A/C): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 25: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 28: Electrical load sense (ELS): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C86 3: A/T power/normal mode (P): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C88 13: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C88 14: Neutral/park switch (NSW): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C88 31: TRAC throttle idle switch (IDL2): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C88 32: TPS idle switch (IDL1): no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX - OEM-C85 11: Slave TRAC throttle position (VTO2): no free analog_out on Link G4X AtomX - OEM-C85 7: Slave throttle position (VTO1): no free analog_out on Link G4X AtomX - OEM-C88 19: Voltage feedback (VF): no free analog_out on Link G4X AtomX

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docLink: G4X AtomX quickstarthttps://linkecu.com/documentation/AtomXQuickstartGuide.pdfarchive2026-10-055fa903ea7bdf
3community_copyYourSpec: Link G4X AtomX ECU flying-lead harness wiring listhttps://wpm.yourspec.com/projects/view/1462———
2community_copywilbo666: 1JZ-GTE pinout (JZZ30 Soarer page, shared 1JZ-GTE engine/ECU)http://wilbo666.pbworks.com/w/page/47216384/1JZ-GTE%20JZZ30%20Soarer———