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Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) → MoTeC M170 13170 (auto)

Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) — MoTeC — M170
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-20

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 errorsnone
Size of the job53 wires · 10 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-D-4ASP-14V-10.85☐☐☐☐☐☐☐
W2OEM-D-4ESP-14V-10.85☐☐☐☐☐☐☐
W3NEW-KEYON-1MAIN-R-COIL+0.5☐☐☐☐☐☐☐
W4NEW-BATT-1MAIN-R-IN0.85☐☐☐☐☐☐☐
W5MAIN-R-COIL-SP-GND-10.5☐☐☐☐☐☐☐
W6MAIN-R-OUTM170-A-230.85☐☐☐☐☐☐☐
W7MAIN-R-OUTM170-A-320.85☐☐☐☐☐☐☐
W8MAIN-R-OUTM170-A-410.85☐☐☐☐☐☐☐
W9OEM-D-4BM170-A-540.85☐☐☐☐☐☐☐
W10OEM-A-1AFSP-GND-10.85☐☐☐☐☐☐☐
W11OEM-A-1AJSP-GND-10.85☐☐☐☐☐☐☐
W12OEM-A-1LSP-GND-10.85☐☐☐☐☐☐☐
W13SP-GND-1M170-A-140.85☐☐☐☐☐☐☐
W14SP-GND-1M170-A-150.85☐☐☐☐☐☐☐
W15SP-GND-1M170-A-190.85☐☐☐☐☐☐☐
W16SP-GND-1M170-A-200.85☐☐☐☐☐☐☐
W17SP-GND-1M170-A-210.85☐☐☐☐☐☐☐
W18OEM-A-1ABSP-0V-10.5☐☐☐☐☐☐☐
W19OEM-A-1XSP-0V-10.5☐☐☐☐☐☐☐
W20OEM-C-3ABSP-0V-10.5☐☐☐☐☐☐☐
W21OEM-C-3SSP-0V-10.5☐☐☐☐☐☐☐
W22SP-0V-1M170-A-110.5☐☐☐☐☐☐☐
W23SP-0V-1M170-A-270.5☐☐☐☐☐☐☐
W24OEM-C-3AM170-A-160.5☐☐☐☐☐☐☐
W25OEM-C-3RM170-A-490.5☐☐☐☐☐☐☐
W26OEM-C-3UM170-A-560.5☐☐☐☐☐☐☐
W27OEM-C-3OM170-A-290.5☐☐☐☐☐☐☐
W28OEM-D-4AFM170-A-10.5☐☐☐☐☐☐☐
W29OEM-D-4AJM170-A-50.5☐☐☐☐☐☐☐
W30OEM-D-4ANM170-A-40.5☐☐☐☐☐☐☐
W31OEM-A-1QM170-A-330.5☐☐☐☐☐☐☐
W32OEM-A-1UM170-A-430.5☐☐☐☐☐☐☐
W33OEM-A-1YM170-A-500.5☐☐☐☐☐☐☐
W34OEM-A-1ACM170-A-510.5☐☐☐☐☐☐☐
W35OEM-D-4AHM170-A-260.5☐☐☐☐☐☐☐
W36OEM-C-3IM170-A-180.5☐☐☐☐☐☐☐
W37OEM-C-3WM170-A-280.5☐☐☐☐☐☐☐
W38OEM-A-1HM170-A-630.5☐☐☐☐☐☐☐
W39OEM-D-4DM170-A-660.5☐☐☐☐☐☐☐
W40OEM-D-4FM170-A-240.5☐☐☐☐☐☐☐
W41OEM-D-4GM170-A-420.5☐☐☐☐☐☐☐
W42OEM-D-4IM170-A-570.5☐☐☐☐☐☐☐
W43OEM-D-4KM170-A-620.5☐☐☐☐☐☐☐
W44OEM-C-3DM170-A-60.5☐☐☐☐☐☐☐
W45OEM-C-3TM170-A-380.5☐☐☐☐☐☐☐
W46OEM-C-3VM170-A-300.5☐☐☐☐☐☐☐
W47OEM-C-3HM170-A-70.5☐☐☐☐☐☐☐
W48OEM-D-4QM170-A-460.5☐☐☐☐☐☐☐
W49OEM-D-4AAM170-A-450.5☐☐☐☐☐☐☐
W50OEM-D-4CM170-A-520.5☐☐☐☐☐☐☐
W51OEM-D-4SM170-A-530.5☐☐☐☐☐☐☐
W52OEM-D-4VM170-A-130.5☐☐☐☐☐☐☐
W53OEM-D-4WM170-A-220.5☐☐☐☐☐☐☐

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
1M170-A-11M170-A-16open (OL)sensor ground must not touch 5 V sensor reference
2M170-A-11M170-A-23open (OL)sensor ground must not touch +12 V supply
3M170-A-11M170-A-54open (OL)sensor ground must not touch +12 V supply
4M170-A-11NEW-BATT-1open (OL)sensor ground must not touch +12 V supply
5M170-A-11NEW-KEYON-1open (OL)sensor ground must not touch +12 V supply
6M170-A-11OEM-D-4Aopen (OL)sensor ground must not touch +12 V supply
7M170-A-14M170-A-16open (OL)power ground must not touch 5 V sensor reference
8M170-A-14M170-A-23open (OL)power ground must not touch +12 V supply
9M170-A-14M170-A-54open (OL)power ground must not touch +12 V supply
10M170-A-14NEW-BATT-1open (OL)power ground must not touch +12 V supply
11M170-A-14NEW-KEYON-1open (OL)power ground must not touch +12 V supply
12M170-A-14OEM-D-4Aopen (OL)power ground must not touch +12 V supply
13M170-A-16M170-A-23open (OL)5 V sensor reference must not touch +12 V supply
14M170-A-16M170-A-54open (OL)5 V sensor reference must not touch +12 V supply
15M170-A-16NEW-BATT-1open (OL)5 V sensor reference must not touch +12 V supply
16M170-A-16NEW-KEYON-1open (OL)5 V sensor reference must not touch +12 V supply
17M170-A-16OEM-D-4Aopen (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

RevLabelByDate
No revisions yet.

Schematic

M170-AMAIN-RNEW-BATTNEW-KEYONOEM-AOEM-BOEM-COEM-DSP-0VSP-14VSP-GND

Connectors

M170-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Low Side Ignition 1—W28—0.5OEM-D-4AF———
10Low Side Ignition 4————————
11Sensor 0V A—W22—0.5SP-0V-1———
12Analogue Voltage Input 5————————
13Universal Digital Input 7—W52—0.5OEM-D-4V———
14Battery Negative 1—W13—0.85SP-GND-1———
15Battery Negative 2—W14—0.85SP-GND-1———
16Sensor 5.0V A—W24—0.5OEM-C-3A———
17Low Side Ignition 5————————
18Analogue Voltage Input 2—W36—0.5OEM-C-3I———
19Battery Negative 3—W15—0.85SP-GND-1———
2Low Side Ignition 8————————
20Battery Negative 4—W16—0.85SP-GND-1———
21Battery Negative 5—W17—0.85SP-GND-1———
22Universal Digital Input 8—W53—0.5OEM-D-4W———
23Battery Positive—W6—0.85MAIN-R-OUT———
24Peak Hold Injector 5—W40—0.5OEM-D-4F———
25Low Side Ignition 6————————
26Analogue Voltage Input 1—W35—0.5OEM-D-4AH———
27Sensor 0V B—W23—0.5SP-0V-1———
28Analogue Temperature Input 1—W37—0.5OEM-C-3W———
29Knock Input 1—W27—0.5OEM-C-3O———
3Low Side Ignition 7————————
30Analogue Temperature Input 3—W46—0.5OEM-C-3V———
31CAN Bus 1 Low————————
32Battery Positive—W7—0.85MAIN-R-OUT———
33Peak Hold Injector 1—W31—0.5OEM-A-1Q———
34Sensor 5.0V B————————
35Analogue Voltage Input 7————————
36Analogue Voltage Input 6————————
37Sensor 6.3V————————
38Analogue Temperature Input 2—W45—0.5OEM-C-3T———
39Analogue Temperature Input 4————————
4Low Side Ignition 3—W30—0.5OEM-D-4AN———
40CAN Bus 1 High————————
41Battery Positive—W8—0.85MAIN-R-OUT———
42Peak Hold Injector 6—W41—0.5OEM-D-4G———
43Low Side Injector 1—W32—0.5OEM-A-1U———
44Analogue Voltage Input 8————————
45Universal Digital Input 4—W49—0.5OEM-D-4AA———
46Universal Digital Input 3—W48—0.5OEM-D-4Q———
47Ethernet Transmit -————————
48Ethernet Transmit +————————
49Universal Digital Input 1—W25—0.5OEM-C-3R———
5Low Side Ignition 2—W29—0.5OEM-D-4AJ———
50Peak Hold Injector 2—W33—0.5OEM-A-1Y———
51Low Side Injector 2—W34—0.5OEM-A-1AC———
52Universal Digital Input 5—W50—0.5OEM-D-4C———
53Universal Digital Input 6—W51—0.5OEM-D-4S———
54Battery Backup—W9—0.85OEM-D-4B———
55Ethernet Receive +————————
56Universal Digital Input 2—W26—0.5OEM-C-3U———
57Peak Hold Injector 7—W42—0.5OEM-D-4I———
58Half Bridge Output 5————————
59Half Bridge Output 3————————
6Analogue Voltage Input 3—W44—0.5OEM-C-3D———
60Knock Input 2————————
61Ethernet Receive -————————
62Peak Hold Injector 8—W43—0.5OEM-D-4K———
63Peak Hold Injector 3—W38—0.5OEM-A-1H———
64Half Bridge Output 6————————
65Half Bridge Output 4————————
66Peak Hold Injector 4—W39—0.5OEM-D-4D———
7Analogue Voltage Input 4—W47—0.5OEM-C-3H———
8Half Bridge Output 2————————
9Half Bridge Output 1————————

MAIN-R

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
COIL+Relay coil positive (ignition-switched +12V)—W3—0.5NEW-KEYON-1———
COIL-Relay coil negative (ECU low-side driver)—W5—0.5SP-GND-1———
INRelay contact input (battery + via main fuse)—W4—0.85NEW-BATT-1———
OUTRelay contact output (switched +12V bus)—W6—0.85M170-A-23———
OUTRelay contact output (switched +12V bus)—W7—0.85M170-A-32———
OUTRelay contact output (switched +12V bus)—W8—0.85M170-A-41———

NEW-BATT

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85MAIN-R-IN———

NEW-KEYON

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W3—0.5MAIN-R-COIL+———

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1AAOMP stepper phase B1————————
1ABSensor ground—W18—0.5SP-0V-1———
1ACInjector 4 (rear secondary)—W34—0.5M170-A-51———
1AEOMP stepper phase A1————————
1AFPower ground—W10—0.85SP-GND-1———
1AJPower ground—W11—0.85SP-GND-1———
1CIdle speed control (ISC) solenoid————————
1ETurbo charge control solenoid————————
1GPurge solenoid————————
1HCooling fan relay (low speed)—W38—0.5M170-A-63———
1ITurbo charge relief solenoid————————
1KTurbo pre-control solenoid————————
1LPower ground—W12—0.85SP-GND-1———
1MTurbo control solenoid————————
1OBoost control solenoid————————
1QInjector 1 (front primary)—W31—0.5M170-A-33———
1SOMP stepper phase B2————————
1UInjector 2 (rear primary)—W32—0.5M170-A-43———
1WOMP stepper phase A2————————
1XSensor ground—W19—0.5SP-0V-1———
1YInjector 3 (front secondary)—W33—0.5M170-A-50———

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
3A+5V sensor supply—W24—0.5M170-A-16———
3ABSensor ground—W20—0.5SP-0V-1———
3DO2 sensor (narrowband)—W44—0.5M170-A-6———
3GFuel pressure regulator control (PRC) solenoid————————
3HOMP position sensor—W47—0.5M170-A-7———
3IThrottle position (TPS, full range)—W36—0.5M170-A-18———
3OKnock sensor—W27—0.5M170-A-29———
3RCrank position (CAS NE)—W25—0.5M170-A-49———
3SSensor ground (CAS)—W21—0.5SP-0V-1———
3TIntake air temperature (IAT)—W45—0.5M170-A-38———
3UHome position (CAS G)—W26—0.5M170-A-56———
3VFuel temperature—W46—0.5M170-A-30———
3WCoolant temperature (ECT)—W37—0.5M170-A-28———

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
4AECU main power (+12V via main relay/ECR)—W1—0.85SP-14V-1———
4AABrake pedal switch—W49—0.5M170-A-45———
4AFIgnition front trailing—W28—0.5M170-A-1———
4AHMAP sensor (PIM)—W35—0.5M170-A-26———
4AJIgnition rear trailing—W29—0.5M170-A-5———
4ANIgnition leading (wasted spark)—W30—0.5M170-A-4———
4BBattery constant (+12V)—W9—0.85M170-A-54———
4CStart signal (STA)—W50—0.5M170-A-52———
4DAir pump clutch relay—W39—0.5M170-A-66———
4EECU main power (+12V via main relay/ECR)—W2—0.85SP-14V-1———
4FFuel pump speed relay—W40—0.5M170-A-24———
4GFuel pump relay—W41—0.5M170-A-42———
4IA/C relay—W42—0.5M170-A-57———
4KCooling fan relay (low speed)—W43—0.5M170-A-62———
4LCooling fan relay (high speed)————————
4MTachometer output————————
4QVehicle speed sensor—W48—0.5M170-A-46———
4SClutch switch—W51—0.5M170-A-53———
4VA/C request—W52—0.5M170-A-13———
4WPower steering pressure switch—W53—0.5M170-A-22———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W18—0.5OEM-A-1AB———
1——W19—0.5OEM-A-1X———
1——W20—0.5OEM-C-3AB———
1——W21—0.5OEM-C-3S———
1——W22—0.5M170-A-11———
1——W23—0.5M170-A-27———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-D-4A———
1——W2—0.85OEM-D-4E———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W5—0.5MAIN-R-COIL-———
1——W10—0.85OEM-A-1AF———
1——W11—0.85OEM-A-1AJ———
1——W12—0.85OEM-A-1L———
1——W13—0.85M170-A-14———
1——W14—0.85M170-A-15———
1——W15—0.85M170-A-19———
1——W16—0.85M170-A-20———
1——W17—0.85M170-A-21———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1AAOMP stepper phase B1hbridge_out———single_source
OEM-A-1ABSensor groundsensor_groundM170-A-11 + M170-A-27Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-A-1ACInjector 4 (rear secondary)injector_outM170-A-51Low Side Injector 2injector_outsingle_source
OEM-A-1AEOMP stepper phase A1hbridge_out———single_source
OEM-A-1AFPower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 + MAIN-R-COIL-Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Relay coil negative (ECU low-side driver)ground + loadsingle_source
OEM-A-1AJPower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 + MAIN-R-COIL-Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Relay coil negative (ECU low-side driver)ground + loadsingle_source
OEM-A-1CIdle speed control (ISC) solenoidlow_side_out———single_source
OEM-A-1ETurbo charge control solenoidlow_side_out———single_source
OEM-A-1GPurge solenoidlow_side_out———single_source
OEM-A-1HCooling fan relay (low speed)low_side_outM170-A-63Peak Hold Injector 3injector_outsingle_source
OEM-A-1ITurbo charge relief solenoidlow_side_out———single_source
OEM-A-1KTurbo pre-control solenoidlow_side_out———single_source
OEM-A-1LPower groundgroundM170-A-14 + M170-A-15 + M170-A-19 + M170-A-20 + M170-A-21 + MAIN-R-COIL-Battery Negative 1 + Battery Negative 2 + Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Relay coil negative (ECU low-side driver)ground + loadsingle_source
OEM-A-1MTurbo control solenoidlow_side_out———single_source
OEM-A-1OBoost control solenoidlow_side_out———single_source
OEM-A-1QInjector 1 (front primary)injector_outM170-A-33Peak Hold Injector 1injector_outsingle_source
OEM-A-1SOMP stepper phase B2hbridge_out———single_source
OEM-A-1UInjector 2 (rear primary)injector_outM170-A-43Low Side Injector 1injector_outsingle_source
OEM-A-1WOMP stepper phase A2hbridge_out———single_source
OEM-A-1XSensor groundsensor_groundM170-A-11 + M170-A-27Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-A-1YInjector 3 (front secondary)injector_outM170-A-50Peak Hold Injector 2injector_outsingle_source
OEM-C-3A+5V sensor supplyvrefM170-A-16Sensor 5.0V Avrefsingle_source
OEM-C-3ABSensor groundsensor_groundM170-A-11 + M170-A-27Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-C-3DO2 sensor (narrowband)lambda_nb_inM170-A-6Analogue Voltage Input 3analog_insingle_source
OEM-C-3GFuel pressure regulator control (PRC) solenoidlow_side_out———single_source
OEM-C-3HOMP position sensoranalog_inM170-A-7Analogue Voltage Input 4analog_insingle_source
OEM-C-3IThrottle position (TPS, full range)analog_inM170-A-18Analogue Voltage Input 2analog_insingle_source
OEM-C-3OKnock sensorknock_inM170-A-29Knock Input 1knock_insingle_source
OEM-C-3RCrank position (CAS NE)trigger_inM170-A-49Universal Digital Input 1digital_insingle_source
OEM-C-3SSensor ground (CAS)sensor_groundM170-A-11 + M170-A-27Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-C-3TIntake air temperature (IAT)temp_inM170-A-38Analogue Temperature Input 2temp_insingle_source
OEM-C-3UHome position (CAS G)trigger_inM170-A-56Universal Digital Input 2digital_insingle_source
OEM-C-3VFuel temperaturetemp_inM170-A-30Analogue Temperature Input 3temp_insingle_source
OEM-C-3WCoolant temperature (ECT)temp_inM170-A-28Analogue Temperature Input 1temp_insingle_source
OEM-D-4AECU main power (+12V via main relay/ECR)power_in———single_source
OEM-D-4AABrake pedal switchdigital_inM170-A-45Universal Digital Input 4digital_insingle_source
OEM-D-4AFIgnition front trailingignition_outM170-A-1Low Side Ignition 1ignition_outsingle_source
OEM-D-4AHMAP sensor (PIM)analog_inM170-A-26Analogue Voltage Input 1analog_insingle_source
OEM-D-4AJIgnition rear trailingignition_outM170-A-5Low Side Ignition 2ignition_outsingle_source
OEM-D-4ANIgnition leading (wasted spark)ignition_outM170-A-4Low Side Ignition 3ignition_outsingle_source
OEM-D-4BBattery constant (+12V)power_inM170-A-54Battery Backuppower_insingle_source
OEM-D-4CStart signal (STA)digital_inM170-A-52Universal Digital Input 5digital_insingle_source
OEM-D-4DAir pump clutch relaylow_side_outM170-A-66Peak Hold Injector 4injector_outsingle_source
OEM-D-4EECU main power (+12V via main relay/ECR)power_in———single_source
OEM-D-4FFuel pump speed relaylow_side_outM170-A-24Peak Hold Injector 5injector_outsingle_source
OEM-D-4GFuel pump relaylow_side_outM170-A-42Peak Hold Injector 6injector_outsingle_source
OEM-D-4IA/C relaylow_side_outM170-A-57Peak Hold Injector 7injector_outsingle_source
OEM-D-4KCooling fan relay (low speed)low_side_outM170-A-62Peak Hold Injector 8injector_outsingle_source
OEM-D-4LCooling fan relay (high speed)low_side_out———single_source
OEM-D-4MTachometer outputtacho_out———single_source
OEM-D-4QVehicle speed sensordigital_inM170-A-46Universal Digital Input 3digital_insingle_source
OEM-D-4SClutch switchdigital_inM170-A-53Universal Digital Input 6digital_insingle_source
OEM-D-4VA/C requestdigital_inM170-A-13Universal Digital Input 7digital_insingle_source
OEM-D-4WPower steering pressure switchdigital_inM170-A-22Universal Digital Input 8digital_insingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-D-4ASP-14V-10.85no routeECU main power (+12V via main relay/ECR)—
W2OEM-D-4ESP-14V-10.85no routeECU main power (+12V via main relay/ECR)—
W3NEW-KEYON-1MAIN-R-COIL+0.5no routeRelay coil positive (ignition-switched +12V)—
W4NEW-BATT-1MAIN-R-IN0.85no routeRelay contact input (battery + via main fuse)—
W5MAIN-R-COIL-SP-GND-10.5no routeRelay coil negative (ECU low-side driver)—
W6MAIN-R-OUTM170-A-230.85no routeRelay contact output (switched +12V bus)—
W7MAIN-R-OUTM170-A-320.85no routeRelay contact output (switched +12V bus)—
W8MAIN-R-OUTM170-A-410.85no routeRelay contact output (switched +12V bus)—
W9OEM-D-4BM170-A-540.85no routeBattery constant (+12V)—
W10OEM-A-1AFSP-GND-10.85no routePower ground—
W11OEM-A-1AJSP-GND-10.85no routePower ground—
W12OEM-A-1LSP-GND-10.85no routePower ground—
W13SP-GND-1M170-A-140.85no routeBattery Negative 1—
W14SP-GND-1M170-A-150.85no routeBattery Negative 2—
W15SP-GND-1M170-A-190.85no routeBattery Negative 3—
W16SP-GND-1M170-A-200.85no routeBattery Negative 4—
W17SP-GND-1M170-A-210.85no routeBattery Negative 5—
W18OEM-A-1ABSP-0V-10.5no routeSensor ground—
W19OEM-A-1XSP-0V-10.5no routeSensor ground—
W20OEM-C-3ABSP-0V-10.5no routeSensor ground—
W21OEM-C-3SSP-0V-10.5no routeSensor ground (CAS)—
W22SP-0V-1M170-A-110.5no routeSensor 0V A—
W23SP-0V-1M170-A-270.5no routeSensor 0V B—
W24OEM-C-3AM170-A-160.5no route+5V sensor supply—
W25OEM-C-3RM170-A-490.5no routeCrank position (CAS NE)—
W26OEM-C-3UM170-A-560.5no routeHome position (CAS G)—
W27OEM-C-3OM170-A-290.5no routeKnock sensor—
W28OEM-D-4AFM170-A-10.5no routeIgnition front trailing—
W29OEM-D-4AJM170-A-50.5no routeIgnition rear trailing—
W30OEM-D-4ANM170-A-40.5no routeIgnition leading (wasted spark)—
W31OEM-A-1QM170-A-330.5no routeInjector 1 (front primary)—
W32OEM-A-1UM170-A-430.5no routeInjector 2 (rear primary)—
W33OEM-A-1YM170-A-500.5no routeInjector 3 (front secondary)—
W34OEM-A-1ACM170-A-510.5no routeInjector 4 (rear secondary)—
W35OEM-D-4AHM170-A-260.5no routeMAP sensor (PIM)—
W36OEM-C-3IM170-A-180.5no routeThrottle position (TPS, full range)—
W37OEM-C-3WM170-A-280.5no routeCoolant temperature (ECT)—
W38OEM-A-1HM170-A-630.5no routeCooling fan relay (low speed)—
W39OEM-D-4DM170-A-660.5no routeAir pump clutch relay—
W40OEM-D-4FM170-A-240.5no routeFuel pump speed relay—
W41OEM-D-4GM170-A-420.5no routeFuel pump relay—
W42OEM-D-4IM170-A-570.5no routeA/C relay—
W43OEM-D-4KM170-A-620.5no routeCooling fan relay (low speed)—
W44OEM-C-3DM170-A-60.5no routeO2 sensor (narrowband)—
W45OEM-C-3TM170-A-380.5no routeIntake air temperature (IAT)—
W46OEM-C-3VM170-A-300.5no routeFuel temperature—
W47OEM-C-3HM170-A-70.5no routeOMP position sensor—
W48OEM-D-4QM170-A-460.5no routeVehicle speed sensor—
W49OEM-D-4AAM170-A-450.5no routeBrake pedal switch—
W50OEM-D-4CM170-A-520.5no routeStart signal (STA)—
W51OEM-D-4SM170-A-530.5no routeClutch switch—
W52OEM-D-4VM170-A-130.5no routeA/C request—
W53OEM-D-4WM170-A-220.5no routePower steering pressure switch—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (9)

SeverityCodeSubjectMessage
warnNET_FAMILYOEM-C-3R ↔ M170-A-49OEM-C-3R "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-C-3U ↔ M170-A-56OEM-C-3U "Home 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.
infoNET_FAMILYOEM-A-1H ↔ M170-A-63OEM-A-1H "Cooling fan relay (low speed)" [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-D-4D ↔ M170-A-66OEM-D-4D "Air pump clutch 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-D-4F ↔ M170-A-24OEM-D-4F "Fuel pump speed 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-D-4G ↔ M170-A-42OEM-D-4G "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-D-4I ↔ M170-A-57OEM-D-4I "A/C relay" [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.
infoNET_FAMILYOEM-D-4K ↔ M170-A-62OEM-D-4K "Cooling fan relay (low speed)" [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.
infoUNMAPPEDOEM14 optional OEM pins are not mapped: OEM-A-1AA OMP stepper phase B1; OEM-A-1AE OMP stepper phase A1; OEM-A-1C Idle speed control (ISC) solenoid; OEM-A-1E Turbo charge control solenoid; OEM-A-1G Purge solenoid; OEM-A-1I Turbo charge relief solenoid; OEM-A-1K Turbo pre-control solenoid; OEM-A-1M Turbo control solenoid; OEM-A-1O Boost control solenoid; OEM-A-1S OMP stepper phase B2; OEM-A-1W OMP stepper phase A2; OEM-C-3G Fuel pressure regulator control (PRC) solenoid; OEM-D-4L Cooling fan relay (high speed); OEM-D-4M Tachometer output

Accepted (0)

CodeSubjectReasonBy

Notes

Fit check: needs add-on. Resolve these before building: - Sequential twin-turbo control unconfirmed for this ECU - Main power feed not sourced — M170's relay-fed power input is drawn through the main relay, but the feed's fuse rating is not in the library yet - Trigger pattern needs a workaround: Generic crank missing-tooth / multi-tooth / Mazda RX8 (Renesis) modes only; no FD/FC CAS preset in GPR Rotary. Auto-mapped by auto_map() from the library pin data on 2026-10-20. Review every wire against both manuals before building. Not wired: - OEM-D 4L: Cooling fan relay (high speed): no free relay_control/low_side/heater_low_side/ls_hs/injector rated ≥ 0.2 A on MoTeC M170 - OEM-A 1C: Idle speed control (ISC) solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-A 1E: Turbo charge control solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-A 1G: Purge solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-A 1I: Turbo charge relief solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-A 1K: Turbo pre-control solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-A 1M: Turbo control solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-A 1O: Boost control solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-C 3G: Fuel pressure regulator control (PRC) solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M170 - OEM-D 4M: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M170 - OEM-A 1AA: OMP stepper phase B1: no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-A 1AE: OMP stepper phase A1: no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-A 1S: OMP stepper phase B2: no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-A 1W: OMP stepper phase A2: no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docEmtron SL4/SL6/SL8 pinout pageshttps://docs.emtronaustralia.com.au/engine-management/wiring/index.htmlarchive2026-10-05e52b3da9996a
4vendor_docHaltech: RX7 FD Series 7-8 Nexus PnP adapter pinout (HT-186338)https://www.haltech.com/wp-admin/admin-ajax.php?action=ht_get_file&id=681af8c0cc78f3b6860e615e&op=1———
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—2026-10-0503dc5975f739
3forumrusEFI Mazda Miata 2002 engine wiringhttps://github.com/rusefi/rusefi/wiki/Mazda-Miata-2002archive2026-10-05cc3cae670408
2forumdefreezemotorsport: MS3 FD3S 16-bit ECU pinouthttps://defreezemotorsport.ru/doku.php?id=ms3:fd3s162———