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MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) → MaxxECU MaxxECU GEN2 TRACK (auto)

MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) — MaxxECU — MaxxECU GEN2 TRACK
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-04

Revisions

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Schematic

MAXXECUGEN2T-MX1MAXXECUGEN2T-MX2MAXXECUGEN2T-MX3OEM-1OEM-2SP-0VSP-14VSP-GND

Connectors

MAXXECUGEN2T-MX1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition 1—W16—0.5OEM-1-G———
10Digital/VR 1 SIGNAL +—W14—0.5OEM-2-E———
11Digital/VR 1 SIGNAL -————————
12Digital/VR 1 POWER SUPPLY—W13—0.5OEM-2-K———
13Digital/VR 1 SHIELD————————
14SENSOR GND—W12—0.5SP-0V-1———
15CAN L————————
16CAN H————————
17GP out 5 (GND)————————
18Digital/VR 2 SIGNAL +—W15—0.5OEM-2-G———
19Digital/VR 2 SIGNAL -————————
2Ignition 2—W17—0.5OEM-1-H———
20Digital/VR 2 POWER SUPPLY————————
21Digital/VR 2 SHIELD————————
225V power supply————————
23Digital/VR 3 SIGNAL +—W28—0.5OEM-1-C———
24Digital/VR 4 SIGNAL +—W29—0.5OEM-1-N———
2512V supply 1—W2—0.85SP-14V-1———
26AIN 1—W24—0.5OEM-2-O———
27AIN 2—W25—0.5OEM-2-N———
28AIN 3—W26—0.5OEM-2-Q———
29AIN 4—W27—0.5OEM-2-P———
3Ignition 3————————
30AIN 5—W32—0.5OEM-1-V———
31INJECTOR 1—W18—0.5OEM-2-U———
32INJECTOR 2—W19—0.5OEM-2-V———
33INJECTOR 3—W20—0.5OEM-2-Y———
34INJECTOR 4—W21—0.5OEM-2-Z———
4Ignition 4————————
5GP out 1 (GND)—W22—0.5OEM-1-E———
6GP out 2 (GND)—W23—0.5OEM-2-I———
7GP out 3 (GND)————————
8GP out 4 (GND)————————
9Engine gnd—W8—0.85SP-GND-1———

MAXXECUGEN2T-MX2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition 5————————
10WBO2 Sensor 1 VS————————
11WBO2 Sensor 1 COM/VREF————————
12GP OUT 7 / WBO2 Sensor 1 H-————————
13AIN 9————————
14AIN 10————————
15AIN 11————————
16AIN 12————————
17AIN 13————————
18WBO2 sensor 1 RCAL————————
19WBO2 sensor 1 IP————————
2Ignition 6————————
2012V WBO2 sensor 1 H+————————
21WBO2 sensor 1 SHIELD————————
22AIN 14————————
23AIN 15————————
2412V supply 3————————
2512V supply 2—W3—0.85SP-14V-1———
26KNOCK1 SHIELD————————
27KNOCK 1-————————
28KNOCK 1+————————
29KNOCK 2 SHIELD————————
3GP out 6 (GND)————————
30KNOCK 2-————————
31KNOCK 2+————————
32AIN 16————————
33INJECTOR 5————————
34INJECTOR 6————————
4AIN 6—W33—0.5OEM-2-L———
5AIN 7————————
6AIN 8————————
7GP out 13 (H-BRIDGE 1)————————
8GP out 14 (H-BRIDGE 1)————————
9Engine gnd—W9—0.85SP-GND-1———

MAXXECUGEN2T-MX3

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1GP out 15 (H-BRIDGE 2)————————
10WBO2 sensor 2 VS————————
11WBO2 sensor 2 COM/VREF————————
12GP Out 8 (GND) / WBO2 Sensor 2 H-————————
14GP OUT 9 (12V)————————
15GP OUT 10 (12V)————————
16GP OUT 11 (12V)————————
17GP OUT 12 (12V)————————
18WBO2 sensor 2 RCAL————————
19WBO2 sensor 2 IP————————
2GP out 16 (H-BRIDGE 2)————————
2012V WBO2 sensor 2 (H+)————————
21Digital/VR 5 SIGNAL +—W30—0.5OEM-1-P———
22Digital/VR 5 SIGNAL -————————
23Digital/VR 5 SHIELD————————
24CAN 2 L————————
25CAN 2 H————————
26Digital/VR 6 SIGNAL +—W31—0.5OEM-1-Q———
27Digital/VR 6 SIGNAL -————————
28Digital/VR 6 SHIELD————————
29INJECTOR 7————————
3Ignition 7————————
30INJECTOR 8————————
4Ignition 8————————
9Engine gnd—W10—0.85SP-GND-1———

OEM-1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
AConstant +12V————————
BECU power +14V (main relay)—W1—0.85SP-14V-1———
CStart signal—W28—0.5MAXXECUGEN2T-MX1-23———
EMalfunction indicator lamp (MIL)—W22—0.5MAXXECUGEN2T-MX1-5———
GIgnition 1 (coils 1+4, wasted spark)—W16—0.5MAXXECUGEN2T-MX1-1———
HIgnition 2 (coils 2+3, wasted spark)—W17—0.5MAXXECUGEN2T-MX1-2———
NWide-open throttle switch—W29—0.5MAXXECUGEN2T-MX1-24———
PPower steering pressure switch—W30—0.5MAXXECUGEN2T-MX3-21———
QA/C request—W31—0.5MAXXECUGEN2T-MX3-26———
VNeutral/clutch switch—W32—0.5MAXXECUGEN2T-MX1-30———

OEM-2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
APower ground—W4—0.85SP-GND-1———
BPower ground—W5—0.85SP-GND-1———
CPower ground—W6—0.85SP-GND-1———
DPower ground—W7—0.85SP-GND-1———
ECrank position (CAS NE)—W14—0.5MAXXECUGEN2T-MX1-10———
FAFM ground—W11—0.5SP-0V-1———
GCam position (CAS G)—W15—0.5MAXXECUGEN2T-MX1-18———
ITachometer output—W23—0.5MAXXECUGEN2T-MX1-6———
K+5V sensor supply—W13—0.5MAXXECUGEN2T-MX1-12———
LIdle switch (TPS)—W33—0.5MAXXECUGEN2T-MX2-4———
NO2 sensor—W25—0.5MAXXECUGEN2T-MX1-27———
OAir flow meter (AFM)—W24—0.5MAXXECUGEN2T-MX1-26———
PIntake air temperature (IAT)—W27—0.5MAXXECUGEN2T-MX1-29———
QCoolant temperature (ECT)—W26—0.5MAXXECUGEN2T-MX1-28———
UInjector 1—W18—0.5MAXXECUGEN2T-MX1-31———
VInjector 2—W19—0.5MAXXECUGEN2T-MX1-32———
YInjector 3—W20—0.5MAXXECUGEN2T-MX1-33———
ZInjector 4—W21—0.5MAXXECUGEN2T-MX1-34———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-2-F———
1——W12—0.5MAXXECUGEN2T-MX1-14———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-1-B———
1——W2—0.85MAXXECUGEN2T-MX1-25———
1——W3—0.85MAXXECUGEN2T-MX2-25———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-2-A———
1——W5—0.85OEM-2-B———
1——W6—0.85OEM-2-C———
1——W7—0.85OEM-2-D———
1——W8—0.85MAXXECUGEN2T-MX1-9———
1——W9—0.85MAXXECUGEN2T-MX2-9———
1——W10—0.85MAXXECUGEN2T-MX3-9———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-1-AConstant +12Vpower_in———single_source
OEM-1-BECU power +14V (main relay)power_inMAXXECUGEN2T-MX1-25 + MAXXECUGEN2T-MX2-2512V supply 1 + 12V supply 2power_insingle_source
OEM-1-CStart signaldigital_inMAXXECUGEN2T-MX1-23Digital/VR 3 SIGNAL +digital_insingle_source
OEM-1-EMalfunction indicator lamp (MIL)low_side_outMAXXECUGEN2T-MX1-5GP out 1 (GND)low_side_outsingle_source
OEM-1-GIgnition 1 (coils 1+4, wasted spark)ignition_outMAXXECUGEN2T-MX1-1Ignition 1ignition_outsingle_source
OEM-1-HIgnition 2 (coils 2+3, wasted spark)ignition_outMAXXECUGEN2T-MX1-2Ignition 2ignition_outsingle_source
OEM-1-NWide-open throttle switchdigital_inMAXXECUGEN2T-MX1-24Digital/VR 4 SIGNAL +digital_insingle_source
OEM-1-PPower steering pressure switchdigital_inMAXXECUGEN2T-MX3-21Digital/VR 5 SIGNAL +digital_insingle_source
OEM-1-QA/C requestdigital_inMAXXECUGEN2T-MX3-26Digital/VR 6 SIGNAL +digital_insingle_source
OEM-1-VNeutral/clutch switchdigital_inMAXXECUGEN2T-MX1-30AIN 5analog_insingle_source
OEM-2-APower groundgroundMAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9Engine gnd + Engine gnd + Engine gndgroundsingle_source
OEM-2-BPower groundgroundMAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9Engine gnd + Engine gnd + Engine gndgroundsingle_source
OEM-2-CPower groundgroundMAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9Engine gnd + Engine gnd + Engine gndgroundsingle_source
OEM-2-DPower groundgroundMAXXECUGEN2T-MX1-9 + MAXXECUGEN2T-MX2-9 + MAXXECUGEN2T-MX3-9Engine gnd + Engine gnd + Engine gndgroundsingle_source
OEM-2-ECrank position (CAS NE)trigger_inMAXXECUGEN2T-MX1-10Digital/VR 1 SIGNAL +trigger_insingle_source
OEM-2-FAFM groundsensor_groundMAXXECUGEN2T-MX1-14SENSOR GNDsensor_groundsingle_source
OEM-2-GCam position (CAS G)trigger_inMAXXECUGEN2T-MX1-18Digital/VR 2 SIGNAL +trigger_insingle_source
OEM-2-ITachometer outputtacho_outMAXXECUGEN2T-MX1-6GP out 2 (GND)low_side_outsingle_source
OEM-2-K+5V sensor supplyvrefMAXXECUGEN2T-MX1-12Digital/VR 1 POWER SUPPLYvrefsingle_source
OEM-2-LIdle switch (TPS)digital_inMAXXECUGEN2T-MX2-4AIN 6analog_insingle_source
OEM-2-NO2 sensorlambda_nb_inMAXXECUGEN2T-MX1-27AIN 2analog_insingle_source
OEM-2-OAir flow meter (AFM)analog_inMAXXECUGEN2T-MX1-26AIN 1analog_insingle_source
OEM-2-PIntake air temperature (IAT)temp_inMAXXECUGEN2T-MX1-29AIN 4analog_insingle_source
OEM-2-QCoolant temperature (ECT)temp_inMAXXECUGEN2T-MX1-28AIN 3analog_insingle_source
OEM-2-UInjector 1injector_outMAXXECUGEN2T-MX1-31INJECTOR 1injector_outsingle_source
OEM-2-VInjector 2injector_outMAXXECUGEN2T-MX1-32INJECTOR 2injector_outsingle_source
OEM-2-YInjector 3injector_outMAXXECUGEN2T-MX1-33INJECTOR 3injector_outsingle_source
OEM-2-ZInjector 4injector_outMAXXECUGEN2T-MX1-34INJECTOR 4injector_outsingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-1-BSP-14V-10.85no routeECU power +14V (main relay)—
W2SP-14V-1MAXXECUGEN2T-MX1-250.85no route12V supply 1—
W3SP-14V-1MAXXECUGEN2T-MX2-250.85no route12V supply 2—
W4OEM-2-ASP-GND-10.85no routePower ground—
W5OEM-2-BSP-GND-10.85no routePower ground—
W6OEM-2-CSP-GND-10.85no routePower ground—
W7OEM-2-DSP-GND-10.85no routePower ground—
W8SP-GND-1MAXXECUGEN2T-MX1-90.85no routeEngine gnd—
W9SP-GND-1MAXXECUGEN2T-MX2-90.85no routeEngine gnd—
W10SP-GND-1MAXXECUGEN2T-MX3-90.85no routeEngine gnd—
W11OEM-2-FSP-0V-10.5no routeAFM ground—
W12SP-0V-1MAXXECUGEN2T-MX1-140.5no routeSENSOR GND—
W13OEM-2-KMAXXECUGEN2T-MX1-120.5no route+5V sensor supply—
W14OEM-2-EMAXXECUGEN2T-MX1-100.5no routeCrank position (CAS NE)—
W15OEM-2-GMAXXECUGEN2T-MX1-180.5no routeCam position (CAS G)—
W16OEM-1-GMAXXECUGEN2T-MX1-10.5no routeIgnition 1 (coils 1+4, wasted spark)—
W17OEM-1-HMAXXECUGEN2T-MX1-20.5no routeIgnition 2 (coils 2+3, wasted spark)—
W18OEM-2-UMAXXECUGEN2T-MX1-310.5no routeInjector 1—
W19OEM-2-VMAXXECUGEN2T-MX1-320.5no routeInjector 2—
W20OEM-2-YMAXXECUGEN2T-MX1-330.5no routeInjector 3—
W21OEM-2-ZMAXXECUGEN2T-MX1-340.5no routeInjector 4—
W22OEM-1-EMAXXECUGEN2T-MX1-50.5no routeMalfunction indicator lamp (MIL)—
W23OEM-2-IMAXXECUGEN2T-MX1-60.5no routeTachometer output—
W24OEM-2-OMAXXECUGEN2T-MX1-260.5no routeAir flow meter (AFM)—
W25OEM-2-NMAXXECUGEN2T-MX1-270.5no routeO2 sensor—
W26OEM-2-QMAXXECUGEN2T-MX1-280.5no routeCoolant temperature (ECT)—
W27OEM-2-PMAXXECUGEN2T-MX1-290.5no routeIntake air temperature (IAT)—
W28OEM-1-CMAXXECUGEN2T-MX1-230.5no routeStart signal—
W29OEM-1-NMAXXECUGEN2T-MX1-240.5no routeWide-open throttle switch—
W30OEM-1-PMAXXECUGEN2T-MX3-210.5no routePower steering pressure switch—
W31OEM-1-QMAXXECUGEN2T-MX3-260.5no routeA/C request—
W32OEM-1-VMAXXECUGEN2T-MX1-300.5no routeNeutral/clutch switch—
W33OEM-2-LMAXXECUGEN2T-MX2-40.5no routeIdle switch (TPS)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (5)

SeverityCodeSubjectMessage
warnNET_FAMILYOEM-1-V ↔ MAXXECUGEN2T-MX1-30OEM-1-V "Neutral/clutch switch" [digital_in] is wired to MAXXECUGEN2T-MX1-30 "AIN 5" [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-2-L ↔ MAXXECUGEN2T-MX2-4OEM-2-L "Idle switch (TPS)" [digital_in] is wired to MAXXECUGEN2T-MX2-4 "AIN 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.
infoNET_FAMILYOEM-2-I ↔ MAXXECUGEN2T-MX1-6OEM-2-I "Tachometer output" [tacho_out] is wired to MAXXECUGEN2T-MX1-6 "GP out 2 (GND)" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up.
infoNET_FAMILYOEM-2-P ↔ MAXXECUGEN2T-MX1-29OEM-2-P "Intake air temperature (IAT)" [temp_in] is wired to MAXXECUGEN2T-MX1-29 "AIN 4" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-2-Q ↔ MAXXECUGEN2T-MX1-28OEM-2-Q "Coolant temperature (ECT)" [temp_in] is wired to MAXXECUGEN2T-MX1-28 "AIN 3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-1-ABattery-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 2026-10-04. Review every wire against both manuals before building. Not wired: - OEM-1 A: Constant +12V: MaxxECU MaxxECU GEN2 TRACK has no battery-constant input; not needed - MAXXECUGEN2T-MX2 24: 12V supply 3: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source

Sources

ReliabilityKindTitleURL
4vendor_docLink G4X MX5X install manual (NA 1.6/1.8)https://linkecu.com/documentation/MX5X.pdf
4vendor_docMaxxECU GEN2 pinout (RACE MX1–MX4 / TRACK MX1–MX3)http://www.maxxecu.com/webhelp/wirings-maxxecu_gen2_pinout.html