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MX-5 Miata NA8 1994-97 (BP-ZE, 1.8) → MoTeC M170 13170 (auto)

MX-5 Miata NA8 1994-97 (BP-ZE, 1.8) — MoTeC — M170
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-05

Revisions

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Schematic

M170-AOEM-1OEM-2SP-0VSP-14VSP-GND

Connectors

M170-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Low Side Ignition 1—W21—0.5OEM-1-G———
10Low Side Ignition 4————————
11Sensor 0V A—W16—0.5SP-0V-1———
12Analogue Voltage Input 5————————
13Universal Digital Input 7—W44—0.5OEM-1-V———
14Battery Negative 1—W10—0.85SP-GND-1———
15Battery Negative 2—W11—0.85SP-GND-1———
16Sensor 5.0V A—W18—0.5OEM-2-K———
17Low Side Ignition 5————————
18Analogue Voltage Input 2—W36—0.5OEM-2-M———
19Battery Negative 3—W12—0.85SP-GND-1———
2Low Side Ignition 8————————
20Battery Negative 4—W13—0.85SP-GND-1———
21Battery Negative 5—W14—0.85SP-GND-1———
22Universal Digital Input 8————————
23Battery Positive—W2—0.85SP-14V-1———
24Peak Hold Injector 5—W29—0.5OEM-2-S———
25Low Side Ignition 6————————
26Analogue Voltage Input 1—W35—0.5OEM-2-O———
27Sensor 0V B—W17—0.5SP-0V-1———
28Analogue Temperature Input 1—W38—0.5OEM-2-Q———
29Knock Input 1————————
3Low Side Ignition 7————————
30Analogue Temperature Input 3————————
31CAN Bus 1 Low————————
32Battery Positive—W3—0.85SP-14V-1———
33Peak Hold Injector 1—W23—0.5OEM-2-U———
34Sensor 5.0V B————————
35Analogue Voltage Input 7————————
36Analogue Voltage Input 6————————
37Sensor 6.3V————————
38Analogue Temperature Input 2—W39—0.5OEM-2-P———
39Analogue Temperature Input 4————————
4Low Side Ignition 3————————
40CAN Bus 1 High————————
41Battery Positive—W4—0.85SP-14V-1———
42Peak Hold Injector 6—W30—0.5OEM-2-T———
43Low Side Injector 1—W24—0.5OEM-2-V———
44Analogue Voltage Input 8————————
45Universal Digital Input 4—W41—0.5OEM-1-C———
46Universal Digital Input 3—W40—0.5OEM-1-M———
47Ethernet Transmit -————————
48Ethernet Transmit +————————
49Universal Digital Input 1—W19—0.5OEM-2-E———
5Low Side Ignition 2—W22—0.5OEM-1-H———
50Peak Hold Injector 2—W25—0.5OEM-2-Y———
51Low Side Injector 2—W26—0.5OEM-2-Z———
52Universal Digital Input 5—W42—0.5OEM-1-P———
53Universal Digital Input 6—W43—0.5OEM-1-Q———
54Battery Backup—W5—0.85OEM-1-A———
55Ethernet Receive +————————
56Universal Digital Input 2—W20—0.5OEM-2-G———
57Peak Hold Injector 7—W31—0.5OEM-2-W———
58Half Bridge Output 5————————
59Half Bridge Output 3————————
6Analogue Voltage Input 3—W37—0.5OEM-2-N———
60Knock Input 2————————
61Ethernet Receive -————————
62Peak Hold Injector 8—W32—0.5OEM-1-E———
63Peak Hold Injector 3—W27—0.5OEM-1-J———
64Half Bridge Output 6————————
65Half Bridge Output 4————————
66Peak Hold Injector 4—W28—0.5OEM-1-R———
7Analogue Voltage Input 4————————
8Half Bridge Output 2—W34—0.5OEM-2-X———
9Half Bridge Output 1—W33—0.5OEM-2-R———

OEM-1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
AConstant +12V—W5—0.85M170-A-54———
BECU power +14V (main relay)—W1—0.85SP-14V-1———
CStart signal—W41—0.5M170-A-45———
EMalfunction indicator lamp (MIL)—W32—0.5M170-A-62———
GIgnition 1 (coils 1+4, wasted spark)—W21—0.5M170-A-1———
HIgnition 2 (coils 2+3, wasted spark)—W22—0.5M170-A-5———
JA/C relay—W27—0.5M170-A-63———
MVehicle speed—W40—0.5M170-A-46———
PPower steering pressure switch—W42—0.5M170-A-52———
QA/C request—W43—0.5M170-A-53———
RCooling fan relay—W28—0.5M170-A-66———
VNeutral/clutch switch—W44—0.5M170-A-13———

OEM-2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
APower ground—W6—0.85SP-GND-1———
BPower ground—W7—0.85SP-GND-1———
CPower ground—W8—0.85SP-GND-1———
DPower ground—W9—0.85SP-GND-1———
ECrank position (CAS NE)—W19—0.5M170-A-49———
FMAF ground—W15—0.5SP-0V-1———
GCam position (CAS G)—W20—0.5M170-A-56———
ITachometer output————————
K+5V sensor supply—W18—0.5M170-A-16———
MThrottle position (TPS)—W36—0.5M170-A-18———
NO2 sensor—W37—0.5M170-A-6———
OMass air flow (MAF)—W35—0.5M170-A-26———
PIntake air temperature (IAT)—W39—0.5M170-A-38———
QCoolant temperature (ECT)—W38—0.5M170-A-28———
RPRC solenoid (fuel pressure regulator)—W33—0.5M170-A-9———
SCondenser fan relay—W29—0.5M170-A-24———
TFuel pump relay—W30—0.5M170-A-42———
UInjector 1—W23—0.5M170-A-33———
VInjector 2—W24—0.5M170-A-43———
WISC solenoid—W31—0.5M170-A-57———
XEvap purge solenoid—W34—0.5M170-A-8———
YInjector 3—W25—0.5M170-A-50———
ZInjector 4—W26—0.5M170-A-51———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W15—0.5OEM-2-F———
1——W16—0.5M170-A-11———
1——W17—0.5M170-A-27———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-1-B———
1——W2—0.85M170-A-23———
1——W3—0.85M170-A-32———
1——W4—0.85M170-A-41———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W6—0.85OEM-2-A———
1——W7—0.85OEM-2-B———
1——W8—0.85OEM-2-C———
1——W9—0.85OEM-2-D———
1——W10—0.85M170-A-14———
1——W11—0.85M170-A-15———
1——W12—0.85M170-A-19———
1——W13—0.85M170-A-20———
1——W14—0.85M170-A-21———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-1-AConstant +12Vpower_inM170-A-54Battery Backuppower_insingle_source
OEM-1-BECU power +14V (main relay)power_inM170-A-23 + M170-A-32 + M170-A-41Battery Positive + Battery Positive + Battery Positivepower_insingle_source
OEM-1-CStart signaldigital_inM170-A-45Universal Digital Input 4digital_insingle_source
OEM-1-EMalfunction indicator lamp (MIL)low_side_outM170-A-62Peak Hold Injector 8injector_outsingle_source
OEM-1-GIgnition 1 (coils 1+4, wasted spark)ignition_outM170-A-1Low Side Ignition 1ignition_outsingle_source
OEM-1-HIgnition 2 (coils 2+3, wasted spark)ignition_outM170-A-5Low Side Ignition 2ignition_outsingle_source
OEM-1-JA/C relaylow_side_outM170-A-63Peak Hold Injector 3injector_outsingle_source
OEM-1-MVehicle speeddigital_inM170-A-46Universal Digital Input 3digital_insingle_source
OEM-1-PPower steering pressure switchdigital_inM170-A-52Universal Digital Input 5digital_insingle_source
OEM-1-QA/C requestdigital_inM170-A-53Universal Digital Input 6digital_insingle_source
OEM-1-RCooling fan relaylow_side_outM170-A-66Peak Hold Injector 4injector_outsingle_source
OEM-1-VNeutral/clutch switchdigital_inM170-A-13Universal Digital Input 7digital_insingle_source
OEM-2-APower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5groundsingle_source
OEM-2-BPower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5groundsingle_source
OEM-2-CPower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5groundsingle_source
OEM-2-DPower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5groundsingle_source
OEM-2-ECrank position (CAS NE)trigger_inM170-A-49Universal Digital Input 1digital_insingle_source
OEM-2-FMAF groundsensor_groundM170-A-11 + M170-A-27Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-2-GCam position (CAS G)trigger_inM170-A-56Universal Digital Input 2digital_insingle_source
OEM-2-ITachometer outputtacho_out———single_source
OEM-2-K+5V sensor supplyvrefM170-A-16Sensor 5.0V Avrefsingle_source
OEM-2-MThrottle position (TPS)analog_inM170-A-18Analogue Voltage Input 2analog_insingle_source
OEM-2-NO2 sensorlambda_nb_inM170-A-6Analogue Voltage Input 3analog_insingle_source
OEM-2-OMass air flow (MAF)analog_inM170-A-26Analogue Voltage Input 1analog_insingle_source
OEM-2-PIntake air temperature (IAT)temp_inM170-A-38Analogue Temperature Input 2temp_insingle_source
OEM-2-QCoolant temperature (ECT)temp_inM170-A-28Analogue Temperature Input 1temp_insingle_source
OEM-2-RPRC solenoid (fuel pressure regulator)low_side_outM170-A-9Half Bridge Output 1hbridge_outsingle_source
OEM-2-SCondenser fan relaylow_side_outM170-A-24Peak Hold Injector 5injector_outsingle_source
OEM-2-TFuel pump relaylow_side_outM170-A-42Peak Hold Injector 6injector_outsingle_source
OEM-2-UInjector 1injector_outM170-A-33Peak Hold Injector 1injector_outsingle_source
OEM-2-VInjector 2injector_outM170-A-43Low Side Injector 1injector_outsingle_source
OEM-2-WISC solenoidlow_side_outM170-A-57Peak Hold Injector 7injector_outsingle_source
OEM-2-XEvap purge solenoidlow_side_outM170-A-8Half Bridge Output 2hbridge_outsingle_source
OEM-2-YInjector 3injector_outM170-A-50Peak Hold Injector 2injector_outsingle_source
OEM-2-ZInjector 4injector_outM170-A-51Low Side Injector 2injector_outsingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-1-BSP-14V-10.85no routeECU power +14V (main relay)—
W2SP-14V-1M170-A-230.85no routeBattery Positive—
W3SP-14V-1M170-A-320.85no routeBattery Positive—
W4SP-14V-1M170-A-410.85no routeBattery Positive—
W5OEM-1-AM170-A-540.85no routeConstant +12V—
W6OEM-2-ASP-GND-10.85no routePower ground—
W7OEM-2-BSP-GND-10.85no routePower ground—
W8OEM-2-CSP-GND-10.85no routePower ground—
W9OEM-2-DSP-GND-10.85no routePower ground—
W10SP-GND-1M170-A-140.85no routeBattery Negative 1—
W11SP-GND-1M170-A-150.85no routeBattery Negative 2—
W12SP-GND-1M170-A-190.85no routeBattery Negative 3—
W13SP-GND-1M170-A-200.85no routeBattery Negative 4—
W14SP-GND-1M170-A-210.85no routeBattery Negative 5—
W15OEM-2-FSP-0V-10.5no routeMAF ground—
W16SP-0V-1M170-A-110.5no routeSensor 0V A—
W17SP-0V-1M170-A-270.5no routeSensor 0V B—
W18OEM-2-KM170-A-160.5no route+5V sensor supply—
W19OEM-2-EM170-A-490.5no routeCrank position (CAS NE)—
W20OEM-2-GM170-A-560.5no routeCam position (CAS G)—
W21OEM-1-GM170-A-10.5no routeIgnition 1 (coils 1+4, wasted spark)—
W22OEM-1-HM170-A-50.5no routeIgnition 2 (coils 2+3, wasted spark)—
W23OEM-2-UM170-A-330.5no routeInjector 1—
W24OEM-2-VM170-A-430.5no routeInjector 2—
W25OEM-2-YM170-A-500.5no routeInjector 3—
W26OEM-2-ZM170-A-510.5no routeInjector 4—
W27OEM-1-JM170-A-630.5no routeA/C relay—
W28OEM-1-RM170-A-660.5no routeCooling fan relay—
W29OEM-2-SM170-A-240.5no routeCondenser fan relay—
W30OEM-2-TM170-A-420.5no routeFuel pump relay—
W31OEM-2-WM170-A-570.5no routeISC solenoid—
W32OEM-1-EM170-A-620.5no routeMalfunction indicator lamp (MIL)—
W33OEM-2-RM170-A-90.5no routePRC solenoid (fuel pressure regulator)—
W34OEM-2-XM170-A-80.5no routeEvap purge solenoid—
W35OEM-2-OM170-A-260.5no routeMass air flow (MAF)—
W36OEM-2-MM170-A-180.5no routeThrottle position (TPS)—
W37OEM-2-NM170-A-60.5no routeO2 sensor—
W38OEM-2-QM170-A-280.5no routeCoolant temperature (ECT)—
W39OEM-2-PM170-A-380.5no routeIntake air temperature (IAT)—
W40OEM-1-MM170-A-460.5no routeVehicle speed—
W41OEM-1-CM170-A-450.5no routeStart signal—
W42OEM-1-PM170-A-520.5no routePower steering pressure switch—
W43OEM-1-QM170-A-530.5no routeA/C request—
W44OEM-1-VM170-A-130.5no routeNeutral/clutch switch—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (11)

SeverityCodeSubjectMessage
warnNET_FAMILYOEM-2-E ↔ M170-A-49OEM-2-E "Crank position (CAS NE)" [trigger_in] is wired to M170-A-49 "Universal Digital Input 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
warnNET_FAMILYOEM-2-G ↔ M170-A-56OEM-2-G "Cam position (CAS G)" [trigger_in] is wired to M170-A-56 "Universal 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-2-R ↔ M170-A-9OEM-2-R "PRC solenoid (fuel pressure regulator)" [low_side_out] is wired to M170-A-9 "Half Bridge Output 1" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-2-X ↔ M170-A-8OEM-2-X "Evap purge solenoid" [low_side_out] is wired to M170-A-8 "Half Bridge Output 2" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
infoNET_FAMILYOEM-1-E ↔ M170-A-62OEM-1-E "Malfunction indicator lamp (MIL)" [low_side_out] is wired to M170-A-62 "Peak Hold Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-1-J ↔ M170-A-63OEM-1-J "A/C relay" [low_side_out] is wired to M170-A-63 "Peak Hold Injector 3" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-1-R ↔ M170-A-66OEM-1-R "Cooling fan relay" [low_side_out] is wired to M170-A-66 "Peak Hold Injector 4" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-2-S ↔ M170-A-24OEM-2-S "Condenser fan relay" [low_side_out] is wired to M170-A-24 "Peak Hold Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-2-T ↔ M170-A-42OEM-2-T "Fuel pump relay" [low_side_out] is wired to M170-A-42 "Peak Hold Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-2-W ↔ M170-A-57OEM-2-W "ISC solenoid" [low_side_out] is wired to M170-A-57 "Peak Hold Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoUNMAPPEDOEM1 optional OEM pins are not mapped: OEM-2-I Tachometer output

Accepted (0)

CodeSubjectReasonBy

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-2 I: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M170

Sources

ReliabilityKindTitleURL
4vendor_docLink G4X MX5X install manual (NA 1.6/1.8)https://linkecu.com/documentation/MX5X.pdf
4vendor_docMoTeC: M1 ECU Hardware manual (7 Nov 2013) — M130/M150/M170/M190 pinout tableshttps://web.archive.org/web/2023id_/https://www.motec.com.au/hessian/uploads/M1_ECU_Hardware_c2517380e4.pdf