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Honda NSX NA2 1997-2005 (C32B) → Link G4X MonsoonX (auto)

Honda NSX NA2 1997-2005 (C32B) — Link — G4X MonsoonX
⚠ 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 errors10: read the Findings page before cutting any wire
Size of the job55 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-A-13SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-C-1SP-14V-10.85☐☐☐☐☐☐☐
W3OEM-G-10SP-14V-10.85☐☐☐☐☐☐☐
W4OEM-G-2SP-14V-10.85☐☐☐☐☐☐☐
W5OEM-G-3SP-14V-10.85☐☐☐☐☐☐☐
W6OEM-G-9SP-14V-10.85☐☐☐☐☐☐☐
W7SP-14V-1G4XMONSOONX-A-A50.85☐☐☐☐☐☐☐
W8OEM-A-12SP-GND-10.85☐☐☐☐☐☐☐
W9OEM-A-25SP-GND-10.85☐☐☐☐☐☐☐
W10OEM-G-7SP-GND-10.85☐☐☐☐☐☐☐
W11OEM-G-8SP-GND-10.85☐☐☐☐☐☐☐
W12SP-GND-1G4XMONSOONX-A-A250.85☐☐☐☐☐☐☐
W13SP-GND-1G4XMONSOONX-A-A340.85☐☐☐☐☐☐☐
W14OEM-A-26SP-0V-10.5☐☐☐☐☐☐☐
W15OEM-B-13SP-0V-10.5☐☐☐☐☐☐☐
W16OEM-B-14SP-0V-10.5☐☐☐☐☐☐☐
W17OEM-B-15SP-0V-10.5☐☐☐☐☐☐☐
W18OEM-B-16SP-0V-10.5☐☐☐☐☐☐☐
W19OEM-B-9SP-0V-10.5☐☐☐☐☐☐☐
W20OEM-D-11SP-0V-10.5☐☐☐☐☐☐☐
W21OEM-F-15SP-0V-10.5☐☐☐☐☐☐☐
W22OEM-F-2SP-0V-10.5☐☐☐☐☐☐☐
W23SP-0V-1G4XMONSOONX-A-A240.5☐☐☐☐☐☐☐
W24OEM-D-10SP-5V1-10.5☐☐☐☐☐☐☐
W25OEM-F-1SP-5V1-10.5☐☐☐☐☐☐☐
W26OEM-F-14SP-5V1-10.5☐☐☐☐☐☐☐
W27SP-5V1-1G4XMONSOONX-A-A320.5☐☐☐☐☐☐☐
W28OEM-B-8G4XMONSOONX-A-A80.5☐☐☐☐☐☐☐
W29OEM-B-7G4XMONSOONX-A-A300.5☐☐☐☐☐☐☐
W30OEM-B-6G4XMONSOONX-A-A90.5☐☐☐☐☐☐☐
W31OEM-B-5G4XMONSOONX-A-A310.5☐☐☐☐☐☐☐
W32OEM-D-13G4XMONSOONX-A-A60.5☐☐☐☐☐☐☐
W33OEM-A-11G4XMONSOONX-A-A130.5☐☐☐☐☐☐☐
W34OEM-A-24G4XMONSOONX-A-A120.5☐☐☐☐☐☐☐
W35OEM-B-12G4XMONSOONX-A-A110.5☐☐☐☐☐☐☐
W36OEM-B-11G4XMONSOONX-A-A100.5☐☐☐☐☐☐☐
W37OEM-A-1G4XMONSOONX-A-A40.5☐☐☐☐☐☐☐
W38OEM-A-2G4XMONSOONX-A-A30.5☐☐☐☐☐☐☐
W39OEM-A-3G4XMONSOONX-A-A20.5☐☐☐☐☐☐☐
W40OEM-A-14G4XMONSOONX-A-A10.5☐☐☐☐☐☐☐
W41OEM-A-15G4XMONSOONX-A-A40.5☐☐☐☐☐☐☐
W42OEM-A-16G4XMONSOONX-A-A30.5☐☐☐☐☐☐☐
W43OEM-A-5G4XMONSOONX-A-A210.5☐☐☐☐☐☐☐
W44OEM-F-19G4XMONSOONX-A-A200.5☐☐☐☐☐☐☐
W45OEM-F-20G4XMONSOONX-A-A190.5☐☐☐☐☐☐☐
W46OEM-D-9G4XMONSOONX-A-A170.5☐☐☐☐☐☐☐
W47OEM-F-13G4XMONSOONX-A-A220.5☐☐☐☐☐☐☐
W48OEM-F-12G4XMONSOONX-A-A330.5☐☐☐☐☐☐☐
W49OEM-D-12G4XMONSOONX-A-A140.5☐☐☐☐☐☐☐
W50OEM-D-7G4XMONSOONX-A-A150.5☐☐☐☐☐☐☐
W51OEM-F-4G4XMONSOONX-A-A180.5☐☐☐☐☐☐☐
W52OEM-A-8G4XMONSOONX-A-A270.5☐☐☐☐☐☐☐
W53OEM-A-10G4XMONSOONX-A-A260.5☐☐☐☐☐☐☐
W54OEM-D-8G4XMONSOONX-A-A160.5☐☐☐☐☐☐☐
W55OEM-C-7G4XMONSOONX-A-A230.5☐☐☐☐☐☐☐

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
1G4XMONSOONX-A-A5G4XMONSOONX-A-A24open (OL)+12 V supply must not touch sensor ground
2G4XMONSOONX-A-A24G4XMONSOONX-A-A32open (OL)sensor ground must not touch 5 V sensor reference
3G4XMONSOONX-A-A25G4XMONSOONX-A-A32open (OL)power ground must not touch 5 V sensor reference
4G4XMONSOONX-A-A25G4XMONSOONX-A-A5open (OL)power ground must not touch +12 V supply
5G4XMONSOONX-A-A5G4XMONSOONX-A-A32open (OL)+12 V supply 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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Schematic

G4XMONSOONX-AOEM-AOEM-BOEM-COEM-DOEM-FOEM-GSP-0VSP-14VSP-5V1SP-GND

Connectors

G4XMONSOONX-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
A1Injector 4—W40—0.5OEM-A-14———
A10Ignition 4—W36—0.5OEM-B-11———
A11Ignition 3—W35—0.5OEM-B-12———
A12Ignition 2—W34—0.5OEM-A-24———
A13Ignition 1—W33—0.5OEM-A-11———
A14Analog Volt 4—W49—0.5OEM-D-12———
A15Analog Temp 1—W50—0.5OEM-D-7———
A16Analog Temp 2—W54—0.5OEM-D-8———
A17Analog Volt 1—W46—0.5OEM-D-9———
A18Aux 4—W51—0.5OEM-F-4———
A19Aux 3—W45—0.5OEM-F-20———
A2Injector 3—W39—0.5OEM-A-3———
A20Aux 2—W44—0.5OEM-F-19———
A21Aux 1—W43—0.5OEM-A-5———
A22Analog Volt 2—W47—0.5OEM-F-13———
A23Digital Input 3—W55—0.5OEM-C-7———
A24Sensor Ground—W23—0.5SP-0V-1———
A25System Ground—W12—0.85SP-GND-1———
A26Aux 6—W53—0.5OEM-A-10———
A27Aux 5—W52—0.5OEM-A-8———
A28CAN H————————
A29CAN L————————
A3Injector 2—W38—0.5OEM-A-2———
A3Injector 2—W42—0.5OEM-A-16———
A30Digital Input 1—W29—0.5OEM-B-7———
A31Digital Input 2—W31—0.5OEM-B-5———
A32+5V Out—W27—0.5SP-5V1-1———
A33Analog Volt 3—W48—0.5OEM-F-12———
A34System Ground—W13—0.85SP-GND-1———
A4Injector 1—W37—0.5OEM-A-1———
A4Injector 1—W41—0.5OEM-A-15———
A5+14V ECU Power—W7—0.85SP-14V-1———
A6Knock 1 / Digital Input 4—W32—0.5OEM-D-13———
A7Shield Ground————————
A8Trigger 1—W28—0.5OEM-B-8———
A9Trigger 2—W30—0.5OEM-B-6———

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 1 (INJ1)—W37—0.5G4XMONSOONX-A-A4———
10Rear secondary O2 heater (RSO2SHTC)—W53—0.5G4XMONSOONX-A-A26———
11Ignition coil 1 (IGN COIL1)—W33—0.5G4XMONSOONX-A-A13———
12Power ground (PG1)—W8—0.85SP-GND-1———
13ECM power source (IGP1)—W1—0.85SP-14V-1———
14Injector 4 (INJ4)—W40—0.5G4XMONSOONX-A-A1———
15Injector 5 (INJ5)—W41—0.5G4XMONSOONX-A-A4———
16Injector 6 (INJ6)—W42—0.5G4XMONSOONX-A-A3———
17EVAP bypass solenoid (2WBS)————————
2Injector 2 (INJ2)—W38—0.5G4XMONSOONX-A-A3———
20IAB control solenoid (IABCS)————————
21EVAP purge control solenoid (PCS)————————
22Front primary O2 heater (FPO2SHTC)————————
23Rear primary O2 heater (RPO2SHTC)————————
24Ignition coil 2 (IGN COIL2)—W34—0.5G4XMONSOONX-A-A12———
25Power ground (PG2)—W9—0.85SP-GND-1———
26Logic ground (LG1)—W14—0.5SP-0V-1———
3Injector 3 (INJ3)—W39—0.5G4XMONSOONX-A-A2———
4EVAP canister vent shut valve (VSV)————————
5Fuel pump relay (FLR1)—W43—0.5G4XMONSOONX-A-A21———
6EGR control solenoid (ESOL)————————
7Malfunction indicator lamp (MIL)————————
8A/C clutch relay (ACC)—W52—0.5G4XMONSOONX-A-A27———
9Front secondary O2 heater (FSO2SHTC)————————

OEM-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1VTEC pressure switch front (VTP SWF)————————
10Ignition coil 5 (IGN COIL5)————————
11Ignition coil 4 (IGN COIL4)—W36—0.5G4XMONSOONX-A-A10———
12Ignition coil 3 (IGN COIL3)—W35—0.5G4XMONSOONX-A-A11———
13Cylinder position sensor 2 return (CYP 2M)—W15—0.5SP-0V-1———
14Cylinder position sensor 1 return (CYP 1M)—W16—0.5SP-0V-1———
15Crank position sensor 2 return (CKP 2M)—W17—0.5SP-0V-1———
16Crank position sensor 1 return (CKP 1M)—W18—0.5SP-0V-1———
2Ignition coil 6 (IGN COIL6)————————
3VTEC pressure switch rear (VTP SWR)————————
4Neutral switch (NT SW, M/T)————————
5Cylinder position sensor 2 + (CYP 2P)—W31—0.5G4XMONSOONX-A-A31———
6Cylinder position sensor 1 + (CYP 1P)—W30—0.5G4XMONSOONX-A-A9———
7Crank position sensor 2 + (CKP 2P)—W29—0.5G4XMONSOONX-A-A30———
8Crank position sensor 1 + (CKP 1P)—W28—0.5G4XMONSOONX-A-A8———
9Logic ground (LG2)—W19—0.5SP-0V-1———

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1ECM power source (IGP2)—W2—0.85SP-14V-1———
4Clutch switch (MTCLS, M/T)————————
6Starter switch (STS)————————
7Vehicle speed sensor (VSS)—W55—0.5G4XMONSOONX-A-A23———
8Engine speed pulse (NEP)————————

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Backup power (VBU)————————
10Sensor 5V supply (VCC2)—W24—0.5SP-5V1-1———
11Sensor ground (SG2)—W20—0.5SP-0V-1———
12Throttle position sensor (TPS)—W49—0.5G4XMONSOONX-A-A14———
13Knock sensor front (KSF)—W32—0.5G4XMONSOONX-A-A6———
16Front secondary O2 signal (O2S FS)————————
17Rear secondary O2 signal (O2S RS)————————
18Front primary O2 signal (O2S FP)————————
19Rear primary O2 signal (O2S RP)————————
2Knock sensor rear (KSR)————————
20EGR valve lift sensor (EGRL)————————
4K-line diagnostics————————
7Engine coolant temperature (ECT)—W50—0.5G4XMONSOONX-A-A15———
8Intake air temperature (IAT)—W54—0.5G4XMONSOONX-A-A16———
9MAP sensor—W46—0.5G4XMONSOONX-A-A17———

OEM-F

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Sensor 5V supply (VCC1)—W25—0.5SP-5V1-1———
12Accelerator pedal position 2 (AP2)—W48—0.5G4XMONSOONX-A-A33———
13Accelerator pedal position 1 (AP1)—W47—0.5G4XMONSOONX-A-A22———
14Accelerator pedal 5V supply (VCC3)—W26—0.5SP-5V1-1———
15Accelerator pedal ground (SG3)—W21—0.5SP-0V-1———
16Brake switch 1 (BKSW1)————————
19VTEC solenoid front (VT SOLF)—W44—0.5G4XMONSOONX-A-A20———
2Sensor ground (SG1)—W22—0.5SP-0V-1———
20VTEC solenoid rear (VT SOLR)—W45—0.5G4XMONSOONX-A-A19———
4Fuel pump relay 2 (FLR2)—W51—0.5G4XMONSOONX-A-A18———
6Brake switch 2 (BKSW2)————————

OEM-G

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Throttle motor common power phases 2&4 (COM2)—W3—0.85SP-14V-1———
11Throttle motor phase 3 (PM3)————————
12Throttle motor phase 4 (PM4)————————
2Throttle motor power source 1 (IGM1)—W4—0.85SP-14V-1———
3Throttle motor power source 2 (IGM2)—W5—0.85SP-14V-1———
4Throttle motor phase 1 (PM1)————————
5Throttle motor phase 2 (PM2)————————
7Throttle motor ground 1 (PGM1)—W10—0.85SP-GND-1———
8Throttle motor ground 2 (PGM2)—W11—0.85SP-GND-1———
9Throttle motor common power phases 1&3 (COM1)—W6—0.85SP-14V-1———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W14—0.5OEM-A-26———
1——W15—0.5OEM-B-13———
1——W16—0.5OEM-B-14———
1——W17—0.5OEM-B-15———
1——W18—0.5OEM-B-16———
1——W19—0.5OEM-B-9———
1——W20—0.5OEM-D-11———
1——W21—0.5OEM-F-15———
1——W22—0.5OEM-F-2———
1——W23—0.5G4XMONSOONX-A-A24———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-A-13———
1——W2—0.85OEM-C-1———
1——W3—0.85OEM-G-10———
1——W4—0.85OEM-G-2———
1——W5—0.85OEM-G-3———
1——W6—0.85OEM-G-9———
1——W7—0.85G4XMONSOONX-A-A5———

SP-5V1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W24—0.5OEM-D-10———
1——W25—0.5OEM-F-1———
1——W26—0.5OEM-F-14———
1——W27—0.5G4XMONSOONX-A-A32———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W8—0.85OEM-A-12———
1——W9—0.85OEM-A-25———
1——W10—0.85OEM-G-7———
1——W11—0.85OEM-G-8———
1——W12—0.85G4XMONSOONX-A-A25———
1——W13—0.85G4XMONSOONX-A-A34———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1Injector 1 (INJ1)injector_outG4XMONSOONX-A-A4Injector 1injector_outsingle_source
OEM-A-10Rear secondary O2 heater (RSO2SHTC)low_side_outG4XMONSOONX-A-A26Aux 6low_side_outsingle_source
OEM-A-11Ignition coil 1 (IGN COIL1)ignition_outG4XMONSOONX-A-A13Ignition 1ignition_outsingle_source
OEM-A-12Power ground (PG1)groundG4XMONSOONX-A-A25 + G4XMONSOONX-A-A34System Ground + System Groundgroundsingle_source
OEM-A-13ECM power source (IGP1)power_inG4XMONSOONX-A-A5+14V ECU Powerpower_insingle_source
OEM-A-14Injector 4 (INJ4)injector_outG4XMONSOONX-A-A1Injector 4injector_outsingle_source
OEM-A-15Injector 5 (INJ5)injector_outG4XMONSOONX-A-A4Injector 1injector_outsingle_source
OEM-A-16Injector 6 (INJ6)injector_outG4XMONSOONX-A-A3Injector 2injector_outsingle_source
OEM-A-17EVAP bypass solenoid (2WBS)low_side_out———single_source
OEM-A-2Injector 2 (INJ2)injector_outG4XMONSOONX-A-A3Injector 2injector_outsingle_source
OEM-A-20IAB control solenoid (IABCS)low_side_out———single_source
OEM-A-21EVAP purge control solenoid (PCS)low_side_out———single_source
OEM-A-22Front primary O2 heater (FPO2SHTC)low_side_out———single_source
OEM-A-23Rear primary O2 heater (RPO2SHTC)low_side_out———single_source
OEM-A-24Ignition coil 2 (IGN COIL2)ignition_outG4XMONSOONX-A-A12Ignition 2ignition_outsingle_source
OEM-A-25Power ground (PG2)groundG4XMONSOONX-A-A25 + G4XMONSOONX-A-A34System Ground + System Groundgroundsingle_source
OEM-A-26Logic ground (LG1)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-A-3Injector 3 (INJ3)injector_outG4XMONSOONX-A-A2Injector 3injector_outsingle_source
OEM-A-4EVAP canister vent shut valve (VSV)low_side_out———single_source
OEM-A-5Fuel pump relay (FLR1)low_side_outG4XMONSOONX-A-A21Aux 1low_side_outsingle_source
OEM-A-6EGR control solenoid (ESOL)low_side_out———single_source
OEM-A-7Malfunction indicator lamp (MIL)low_side_out———single_source
OEM-A-8A/C clutch relay (ACC)low_side_outG4XMONSOONX-A-A27Aux 5low_side_outsingle_source
OEM-A-9Front secondary O2 heater (FSO2SHTC)low_side_out———single_source
OEM-B-1VTEC pressure switch front (VTP SWF)digital_in———single_source
OEM-B-10Ignition coil 5 (IGN COIL5)ignition_out———single_source
OEM-B-11Ignition coil 4 (IGN COIL4)ignition_outG4XMONSOONX-A-A10Ignition 4ignition_outsingle_source
OEM-B-12Ignition coil 3 (IGN COIL3)ignition_outG4XMONSOONX-A-A11Ignition 3ignition_outsingle_source
OEM-B-13Cylinder position sensor 2 return (CYP 2M)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-B-14Cylinder position sensor 1 return (CYP 1M)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-B-15Crank position sensor 2 return (CKP 2M)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-B-16Crank position sensor 1 return (CKP 1M)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-B-2Ignition coil 6 (IGN COIL6)ignition_out———single_source
OEM-B-3VTEC pressure switch rear (VTP SWR)digital_in———single_source
OEM-B-4Neutral switch (NT SW, M/T)digital_in———single_source
OEM-B-5Cylinder position sensor 2 + (CYP 2P)trigger_inG4XMONSOONX-A-A31Digital Input 2digital_insingle_source
OEM-B-6Cylinder position sensor 1 + (CYP 1P)trigger_inG4XMONSOONX-A-A9Trigger 2trigger_insingle_source
OEM-B-7Crank position sensor 2 + (CKP 2P)trigger_inG4XMONSOONX-A-A30Digital Input 1digital_insingle_source
OEM-B-8Crank position sensor 1 + (CKP 1P)trigger_inG4XMONSOONX-A-A8Trigger 1trigger_insingle_source
OEM-B-9Logic ground (LG2)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-C-1ECM power source (IGP2)power_inG4XMONSOONX-A-A5+14V ECU Powerpower_insingle_source
OEM-C-4Clutch switch (MTCLS, M/T)digital_in———single_source
OEM-C-6Starter switch (STS)digital_in———single_source
OEM-C-7Vehicle speed sensor (VSS)digital_inG4XMONSOONX-A-A23Digital Input 3digital_insingle_source
OEM-C-8Engine speed pulse (NEP)tacho_out———single_source
OEM-D-1Backup power (VBU)power_in———single_source
OEM-D-10Sensor 5V supply (VCC2)vrefG4XMONSOONX-A-A32+5V Outvrefsingle_source
OEM-D-11Sensor ground (SG2)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-D-12Throttle position sensor (TPS)analog_inG4XMONSOONX-A-A14Analog Volt 4analog_insingle_source
OEM-D-13Knock sensor front (KSF)knock_inG4XMONSOONX-A-A6Knock 1 / Digital Input 4knock_insingle_source
OEM-D-16Front secondary O2 signal (O2S FS)lambda_nb_in———single_source
OEM-D-17Rear secondary O2 signal (O2S RS)lambda_nb_in———single_source
OEM-D-18Front primary O2 signal (O2S FP)lambda_nb_in———single_source
OEM-D-19Rear primary O2 signal (O2S RP)lambda_nb_in———single_source
OEM-D-2Knock sensor rear (KSR)knock_in———single_source
OEM-D-20EGR valve lift sensor (EGRL)analog_in———single_source
OEM-D-4K-line diagnosticsserial———single_source
OEM-D-7Engine coolant temperature (ECT)temp_inG4XMONSOONX-A-A15Analog Temp 1temp_insingle_source
OEM-D-8Intake air temperature (IAT)temp_inG4XMONSOONX-A-A16Analog Temp 2temp_insingle_source
OEM-D-9MAP sensoranalog_inG4XMONSOONX-A-A17Analog Volt 1analog_insingle_source
OEM-F-1Sensor 5V supply (VCC1)vrefG4XMONSOONX-A-A32+5V Outvrefsingle_source
OEM-F-12Accelerator pedal position 2 (AP2)analog_inG4XMONSOONX-A-A33Analog Volt 3analog_insingle_source
OEM-F-13Accelerator pedal position 1 (AP1)analog_inG4XMONSOONX-A-A22Analog Volt 2analog_insingle_source
OEM-F-14Accelerator pedal 5V supply (VCC3)vrefG4XMONSOONX-A-A32+5V Outvrefsingle_source
OEM-F-15Accelerator pedal ground (SG3)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-F-16Brake switch 1 (BKSW1)digital_in———single_source
OEM-F-19VTEC solenoid front (VT SOLF)low_side_outG4XMONSOONX-A-A20Aux 2low_side_outsingle_source
OEM-F-2Sensor ground (SG1)sensor_groundG4XMONSOONX-A-A24Sensor Groundsensor_groundsingle_source
OEM-F-20VTEC solenoid rear (VT SOLR)low_side_outG4XMONSOONX-A-A19Aux 3low_side_outsingle_source
OEM-F-4Fuel pump relay 2 (FLR2)low_side_outG4XMONSOONX-A-A18Aux 4low_side_outsingle_source
OEM-F-6Brake switch 2 (BKSW2)digital_in———single_source
OEM-G-10Throttle motor common power phases 2&4 (COM2)power_inG4XMONSOONX-A-A5+14V ECU Powerpower_insingle_source
OEM-G-11Throttle motor phase 3 (PM3)hbridge_out———single_source
OEM-G-12Throttle motor phase 4 (PM4)hbridge_out———single_source
OEM-G-2Throttle motor power source 1 (IGM1)power_inG4XMONSOONX-A-A5+14V ECU Powerpower_insingle_source
OEM-G-3Throttle motor power source 2 (IGM2)power_inG4XMONSOONX-A-A5+14V ECU Powerpower_insingle_source
OEM-G-4Throttle motor phase 1 (PM1)hbridge_out———single_source
OEM-G-5Throttle motor phase 2 (PM2)hbridge_out———single_source
OEM-G-7Throttle motor ground 1 (PGM1)groundG4XMONSOONX-A-A25 + G4XMONSOONX-A-A34System Ground + System Groundgroundsingle_source
OEM-G-8Throttle motor ground 2 (PGM2)groundG4XMONSOONX-A-A25 + G4XMONSOONX-A-A34System Ground + System Groundgroundsingle_source
OEM-G-9Throttle motor common power phases 1&3 (COM1)power_inG4XMONSOONX-A-A5+14V ECU Powerpower_insingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-A-13SP-14V-10.85no routeECM power source (IGP1)—
W2OEM-C-1SP-14V-10.85no routeECM power source (IGP2)—
W3OEM-G-10SP-14V-10.85no routeThrottle motor common power phases 2&4 (COM2)—
W4OEM-G-2SP-14V-10.85no routeThrottle motor power source 1 (IGM1)—
W5OEM-G-3SP-14V-10.85no routeThrottle motor power source 2 (IGM2)—
W6OEM-G-9SP-14V-10.85no routeThrottle motor common power phases 1&3 (COM1)—
W7SP-14V-1G4XMONSOONX-A-A50.85no route+14V ECU Power—
W8OEM-A-12SP-GND-10.85no routePower ground (PG1)—
W9OEM-A-25SP-GND-10.85no routePower ground (PG2)—
W10OEM-G-7SP-GND-10.85no routeThrottle motor ground 1 (PGM1)—
W11OEM-G-8SP-GND-10.85no routeThrottle motor ground 2 (PGM2)—
W12SP-GND-1G4XMONSOONX-A-A250.85no routeSystem Ground—
W13SP-GND-1G4XMONSOONX-A-A340.85no routeSystem Ground—
W14OEM-A-26SP-0V-10.5no routeLogic ground (LG1)—
W15OEM-B-13SP-0V-10.5no routeCylinder position sensor 2 return (CYP 2M)—
W16OEM-B-14SP-0V-10.5no routeCylinder position sensor 1 return (CYP 1M)—
W17OEM-B-15SP-0V-10.5no routeCrank position sensor 2 return (CKP 2M)—
W18OEM-B-16SP-0V-10.5no routeCrank position sensor 1 return (CKP 1M)—
W19OEM-B-9SP-0V-10.5no routeLogic ground (LG2)—
W20OEM-D-11SP-0V-10.5no routeSensor ground (SG2)—
W21OEM-F-15SP-0V-10.5no routeAccelerator pedal ground (SG3)—
W22OEM-F-2SP-0V-10.5no routeSensor ground (SG1)—
W23SP-0V-1G4XMONSOONX-A-A240.5no routeSensor Ground—
W24OEM-D-10SP-5V1-10.5no routeSensor 5V supply (VCC2)—
W25OEM-F-1SP-5V1-10.5no routeSensor 5V supply (VCC1)—
W26OEM-F-14SP-5V1-10.5no routeAccelerator pedal 5V supply (VCC3)—
W27SP-5V1-1G4XMONSOONX-A-A320.5no route+5V Out—
W28OEM-B-8G4XMONSOONX-A-A80.5no routeCrank position sensor 1 + (CKP 1P)—
W29OEM-B-7G4XMONSOONX-A-A300.5no routeCrank position sensor 2 + (CKP 2P)—
W30OEM-B-6G4XMONSOONX-A-A90.5no routeCylinder position sensor 1 + (CYP 1P)—
W31OEM-B-5G4XMONSOONX-A-A310.5no routeCylinder position sensor 2 + (CYP 2P)—
W32OEM-D-13G4XMONSOONX-A-A60.5no routeKnock sensor front (KSF)—
W33OEM-A-11G4XMONSOONX-A-A130.5no routeIgnition coil 1 (IGN COIL1)—
W34OEM-A-24G4XMONSOONX-A-A120.5no routeIgnition coil 2 (IGN COIL2)—
W35OEM-B-12G4XMONSOONX-A-A110.5no routeIgnition coil 3 (IGN COIL3)—
W36OEM-B-11G4XMONSOONX-A-A100.5no routeIgnition coil 4 (IGN COIL4)—
W37OEM-A-1G4XMONSOONX-A-A40.5no routeInjector 1 (INJ1)—
W38OEM-A-2G4XMONSOONX-A-A30.5no routeInjector 2 (INJ2)—
W39OEM-A-3G4XMONSOONX-A-A20.5no routeInjector 3 (INJ3)—
W40OEM-A-14G4XMONSOONX-A-A10.5no routeInjector 4 (INJ4)—
W41OEM-A-15G4XMONSOONX-A-A40.5no routeInjector 5 (INJ5)—
W42OEM-A-16G4XMONSOONX-A-A30.5no routeInjector 6 (INJ6)—
W43OEM-A-5G4XMONSOONX-A-A210.5no routeFuel pump relay (FLR1)—
W44OEM-F-19G4XMONSOONX-A-A200.5no routeVTEC solenoid front (VT SOLF)—
W45OEM-F-20G4XMONSOONX-A-A190.5no routeVTEC solenoid rear (VT SOLR)—
W46OEM-D-9G4XMONSOONX-A-A170.5no routeMAP sensor—
W47OEM-F-13G4XMONSOONX-A-A220.5no routeAccelerator pedal position 1 (AP1)—
W48OEM-F-12G4XMONSOONX-A-A330.5no routeAccelerator pedal position 2 (AP2)—
W49OEM-D-12G4XMONSOONX-A-A140.5no routeThrottle position sensor (TPS)—
W50OEM-D-7G4XMONSOONX-A-A150.5no routeEngine coolant temperature (ECT)—
W51OEM-F-4G4XMONSOONX-A-A180.5no routeFuel pump relay 2 (FLR2)—
W52OEM-A-8G4XMONSOONX-A-A270.5no routeA/C clutch relay (ACC)—
W53OEM-A-10G4XMONSOONX-A-A260.5no routeRear secondary O2 heater (RSO2SHTC)—
W54OEM-D-8G4XMONSOONX-A-A160.5no routeIntake air temperature (IAT)—
W55OEM-C-7G4XMONSOONX-A-A230.5no routeVehicle speed sensor (VSS)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (18)

SeverityCodeSubjectMessage
errorDBW_SENSOR_INPUTtpsOnly 0 throttle-position track(s) found. An electronic throttle needs two (main and sub) so the ECU can cross-check them.
errorNET_MERGEDG4XMONSOONX-A-A3 + OEM-A-16 + OEM-A-22 different OEM functions share one net: OEM-A-16 Injector 6 (INJ6); OEM-A-2 Injector 2 (INJ2)
errorNET_MERGEDG4XMONSOONX-A-A4 + OEM-A-1 + OEM-A-152 different OEM functions share one net: OEM-A-1 Injector 1 (INJ1); OEM-A-15 Injector 5 (INJ5)
errorREQUIRED_UNMAPPEDOEM-B-10Required OEM function "Ignition coil 5 (IGN COIL5)" (ignition_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-B-2Required OEM function "Ignition coil 6 (IGN COIL6)" (ignition_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-D-2Required OEM function "Knock sensor rear (KSR)" (knock_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-G-11Required OEM function "Throttle motor phase 3 (PM3)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-G-12Required OEM function "Throttle motor phase 4 (PM4)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-G-4Required OEM function "Throttle motor phase 1 (PM1)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-G-5Required OEM function "Throttle motor phase 2 (PM2)" (hbridge_out) is not connected to the new ECU.
warnDBW_SHARED_5VG4XMONSOONX-A-A32 + OEM-D-10 + OEM-F-1 + OEM-F-14 + SP-5V1-1These 5 V supplies are separate in the stock car (OEM-D-10 [tps], OEM-F-14 [pedal]) and here share one ECU 5 V (G4XMONSOONX-A-A32). On a drive-by-wire car the OEM splits them so one short or fault can't corrupt both throttle/pedal tracks at once. G4X MonsoonX has 1 5 V sensor supply pin(s). All are in use, so decide: accept the shared supply (and rely on the ECU's DBW fault checks), or add a separate regulated 5 V for the sub tracks.
warnLOAD_UNKNOWNG4XMONSOONX-A-A18G4XMONSOONX-A-A18 "Aux 4" drives OEM-F-4 Fuel pump relay 2 (FLR2) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNG4XMONSOONX-A-A21G4XMONSOONX-A-A21 "Aux 1" drives OEM-A-5 Fuel pump relay (FLR1) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNG4XMONSOONX-A-A27G4XMONSOONX-A-A27 "Aux 5" drives OEM-A-8 A/C clutch relay (ACC) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnNET_FAMILYOEM-B-5 ↔ G4XMONSOONX-A-A31OEM-B-5 "Cylinder position sensor 2 + (CYP 2P)" [trigger_in] is wired to G4XMONSOONX-A-A31 "Digital Input 2" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
warnNET_FAMILYOEM-B-7 ↔ G4XMONSOONX-A-A30OEM-B-7 "Crank position sensor 2 + (CKP 2P)" [trigger_in] is wired to G4XMONSOONX-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.
warnSUPPLY_GROUPG4XMONSOONX-A-A32 + OEM-D-10 + OEM-F-1 + OEM-F-14 + SP-5V1-1Supplies meant to stay independent share one net: OEM-D-10 [tps], OEM-F-14 [pedal]. The new ECU has no free 5 V reference, so they share one: normal on a standalone, but a short on any of these sensors drops them all.
infoUNMAPPEDOEM23 optional OEM pins are not mapped: OEM-A-17 EVAP bypass solenoid (2WBS); OEM-A-20 IAB control solenoid (IABCS); OEM-A-21 EVAP purge control solenoid (PCS); OEM-A-22 Front primary O2 heater (FPO2SHTC); OEM-A-23 Rear primary O2 heater (RPO2SHTC); OEM-A-4 EVAP canister vent shut valve (VSV); OEM-A-6 EGR control solenoid (ESOL); OEM-A-7 Malfunction indicator lamp (MIL); OEM-A-9 Front secondary O2 heater (FSO2SHTC); OEM-B-1 VTEC pressure switch front (VTP SWF); OEM-B-3 VTEC pressure switch rear (VTP SWR); OEM-B-4 Neutral switch (NT SW, M/T); OEM-C-4 Clutch switch (MTCLS, M/T); OEM-C-6 Starter switch (STS); OEM-C-8 Engine speed pulse (NEP); OEM-D-16 Front secondary O2 signal (O2S FS); OEM-D-17 Rear secondary O2 signal (O2S RS); OEM-D-18 Front primary O2 signal (O2S FP); OEM-D-19 Rear primary O2 signal (O2S RP); OEM-D-20 EGR valve lift sensor (EGRL); OEM-D-4 K-line diagnostics; OEM-F-16 Brake switch 1 (BKSW1); OEM-F-6 Brake switch 2 (BKSW2)

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-D-1Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed.mapping-proposal

Notes

Fit check: needs add-on. Resolve these before building: - Drive-by-wire only with an add-on: Link RET 115-1000 - Only 4 ignition outputs for 6 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 6 injectors: batch / semi-sequential injection - This car has Honda Type 1A (1997+) immobilizer; needs a delete/bypass - Trigger pattern needs a workaround: No C30A/C32B mode in Link docs and no NSX plug-in; community G4X C30A installs reported 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-D 2: Knock sensor rear (KSR): no free knock input on Link G4X MonsoonX - OEM-B 10: Ignition coil 5 (IGN COIL5): no free ignition output on Link G4X MonsoonX - OEM-B 2: Ignition coil 6 (IGN COIL6): no free ignition output on Link G4X MonsoonX - OEM-G 4: Throttle motor phase 1 (PM1): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 5: Throttle motor phase 2 (PM2): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 11: Throttle motor phase 3 (PM3): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 12: Throttle motor phase 4 (PM4): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-D 1: Backup power (VBU): Link G4X MonsoonX has no battery-constant input; not needed - OEM-A 22: Front primary O2 heater (FPO2SHTC): no free heater_low_side/low_side/relay_control/ls_hs/injector on Link G4X MonsoonX - OEM-A 23: Rear primary O2 heater (RPO2SHTC): no free heater_low_side/low_side/relay_control/ls_hs/injector on Link G4X MonsoonX - OEM-A 9: Front secondary O2 heater (FSO2SHTC): no free heater_low_side/low_side/relay_control/ls_hs/injector on Link G4X MonsoonX - OEM-A 17: EVAP bypass solenoid (2WBS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X MonsoonX - OEM-A 20: IAB control solenoid (IABCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X MonsoonX - OEM-A 21: EVAP purge control solenoid (PCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X MonsoonX - OEM-A 4: EVAP canister vent shut valve (VSV): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X MonsoonX - OEM-A 6: EGR control solenoid (ESOL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X MonsoonX - OEM-A 7: Malfunction indicator lamp (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Link G4X MonsoonX - OEM-C 8: Engine speed pulse (NEP): no free tacho/frequency_out/low_side/ls_hs on Link G4X MonsoonX - OEM-D 16: Front secondary O2 signal (O2S FS): no free o2_narrowband/analog_0_5 on Link G4X MonsoonX - OEM-D 17: Rear secondary O2 signal (O2S RS): no free o2_narrowband/analog_0_5 on Link G4X MonsoonX - OEM-D 18: Front primary O2 signal (O2S FP): no free o2_narrowband/analog_0_5 on Link G4X MonsoonX - OEM-D 19: Rear primary O2 signal (O2S RP): no free o2_narrowband/analog_0_5 on Link G4X MonsoonX - OEM-D 20: EGR valve lift sensor (EGRL): no free analog_0_5 on Link G4X MonsoonX - OEM-F 16: Brake switch 1 (BKSW1): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-F 6: Brake switch 2 (BKSW2): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-B 1: VTEC pressure switch front (VTP SWF): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-B 3: VTEC pressure switch rear (VTP SWR): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-B 4: Neutral switch (NT SW, M/T): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-C 4: Clutch switch (MTCLS, M/T): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-C 6: Starter switch (STS): no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-D 4: K-line diagnostics: no free k_line on Link G4X MonsoonX

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_doc1997-2005 Acura NSX Service Manual §11 (PGM-FI), ECM terminal arrangementhttps://www.manualslib.com/manual/1540331/Acura-Nsx-1997.html———
4vendor_docLink: G4X MonsoonX quickstart + RET 115-1000https://linkecu.com/documentation/MonsoonXQuickstartGuide.pdfarchive2026-10-05e8d432b273d6
3community_copyYourSpec: Link G4X MonsoonX flying-lead harness wiring listhttps://wpm.yourspec.com/projects/view/1469———