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Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) → MoTeC M150 13150 (auto)

Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) — MoTeC — M150
⚠ 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 errorsnone
Size of the job66 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☐☐☐☐☐☐☐
W3SP-14V-1M150-B-130.85☐☐☐☐☐☐☐
W4SP-14V-1M150-B-190.85☐☐☐☐☐☐☐
W5SP-14V-1M150-C-260.85☐☐☐☐☐☐☐
W6OEM-D-4BM150-D-120.85☐☐☐☐☐☐☐
W7OEM-A-1AFSP-GND-10.85☐☐☐☐☐☐☐
W8OEM-A-1AJSP-GND-10.85☐☐☐☐☐☐☐
W9OEM-A-1LSP-GND-10.85☐☐☐☐☐☐☐
W10SP-GND-1M150-A-240.85☐☐☐☐☐☐☐
W11SP-GND-1M150-A-250.85☐☐☐☐☐☐☐
W12SP-GND-1M150-A-320.85☐☐☐☐☐☐☐
W13SP-GND-1M150-C-100.85☐☐☐☐☐☐☐
W14SP-GND-1M150-C-110.85☐☐☐☐☐☐☐
W15OEM-A-1ABSP-0V-10.5☐☐☐☐☐☐☐
W16OEM-A-1XSP-0V-10.5☐☐☐☐☐☐☐
W17OEM-C-3ABSP-0V-10.5☐☐☐☐☐☐☐
W18OEM-C-3SSP-0V-10.5☐☐☐☐☐☐☐
W19SP-0V-1M150-A-260.5☐☐☐☐☐☐☐
W20SP-0V-1M150-A-270.5☐☐☐☐☐☐☐
W21SP-0V-1M150-A-330.5☐☐☐☐☐☐☐
W22SP-0V-1M150-A-340.5☐☐☐☐☐☐☐
W23SP-0V-1M150-D-150.5☐☐☐☐☐☐☐
W24SP-0V-1M150-D-160.5☐☐☐☐☐☐☐
W25OEM-C-3AM150-A-100.5☐☐☐☐☐☐☐
W26OEM-C-3RM150-D-10.5☐☐☐☐☐☐☐
W27OEM-C-3UM150-D-20.5☐☐☐☐☐☐☐
W28OEM-C-3OM150-D-70.5☐☐☐☐☐☐☐
W29OEM-D-4AFM150-C-30.5☐☐☐☐☐☐☐
W30OEM-D-4AJM150-C-40.5☐☐☐☐☐☐☐
W31OEM-D-4ANM150-C-50.5☐☐☐☐☐☐☐
W32OEM-A-1QM150-C-190.5☐☐☐☐☐☐☐
W33OEM-A-1UM150-C-230.5☐☐☐☐☐☐☐
W34OEM-A-1YM150-C-200.5☐☐☐☐☐☐☐
W35OEM-A-1ACM150-C-240.5☐☐☐☐☐☐☐
W36OEM-A-1AAM150-C-180.5☐☐☐☐☐☐☐
W37OEM-A-1AEM150-C-10.5☐☐☐☐☐☐☐
W38OEM-A-1SM150-C-310.5☐☐☐☐☐☐☐
W39OEM-A-1WM150-C-320.5☐☐☐☐☐☐☐
W40OEM-A-1HM150-B-90.5☐☐☐☐☐☐☐
W41OEM-D-4DM150-B-150.5☐☐☐☐☐☐☐
W42OEM-D-4FM150-B-80.5☐☐☐☐☐☐☐
W43OEM-D-4GM150-B-140.5☐☐☐☐☐☐☐
W44OEM-D-4IM150-C-210.5☐☐☐☐☐☐☐
W45OEM-D-4KM150-C-220.5☐☐☐☐☐☐☐
W46OEM-D-4LM150-C-270.5☐☐☐☐☐☐☐
W47OEM-A-1CM150-C-280.5☐☐☐☐☐☐☐
W48OEM-A-1EM150-C-290.5☐☐☐☐☐☐☐
W49OEM-A-1GM150-C-300.5☐☐☐☐☐☐☐
W50OEM-A-1IM150-B-220.5☐☐☐☐☐☐☐
W51OEM-A-1KM150-B-230.5☐☐☐☐☐☐☐
W52OEM-A-1MM150-B-240.5☐☐☐☐☐☐☐
W53OEM-A-1OM150-B-250.5☐☐☐☐☐☐☐
W54OEM-C-3GM150-C-330.5☐☐☐☐☐☐☐
W55OEM-D-4AHM150-C-140.5☐☐☐☐☐☐☐
W56OEM-C-3IM150-C-150.5☐☐☐☐☐☐☐
W57OEM-C-3DM150-A-110.5☐☐☐☐☐☐☐
W58OEM-C-3WM150-D-30.5☐☐☐☐☐☐☐
W59OEM-C-3TM150-D-40.5☐☐☐☐☐☐☐
W60OEM-C-3VM150-D-50.5☐☐☐☐☐☐☐
W61OEM-C-3HM150-C-160.5☐☐☐☐☐☐☐
W62OEM-D-4QM150-D-80.5☐☐☐☐☐☐☐
W63OEM-D-4AAM150-A-230.5☐☐☐☐☐☐☐
W64OEM-D-4SM150-A-150.5☐☐☐☐☐☐☐
W65OEM-D-4VM150-A-160.5☐☐☐☐☐☐☐
W66OEM-D-4WM150-A-170.5☐☐☐☐☐☐☐

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
1M150-A-10M150-B-13open (OL)5 V sensor reference must not touch +12 V supply
2M150-A-10M150-D-12open (OL)5 V sensor reference must not touch +12 V supply
3M150-A-24M150-A-10open (OL)power ground must not touch 5 V sensor reference
4M150-A-24M150-B-13open (OL)power ground must not touch +12 V supply
5M150-A-24M150-D-12open (OL)power ground must not touch +12 V supply
6M150-A-26M150-A-10open (OL)sensor ground must not touch 5 V sensor reference
7M150-A-26M150-B-13open (OL)sensor ground must not touch +12 V supply
8M150-A-26M150-D-12open (OL)sensor ground 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

M150-AM150-BM150-CM150-DOEM-AOEM-BOEM-COEM-DSP-0VSP-14VSP-GND

Connectors

M150-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Analogue Temperature Input 5————————
10Sensor 5.0V C1—W25—0.5OEM-C-3A———
11Lambda Narrow Input 1—W57—0.5OEM-C-3D———
12Lambda Narrow Input 2————————
13Knock Input 3————————
14Knock Input 4————————
15Digital Input 2—W64—0.5OEM-D-4S———
16Digital Input 3—W65—0.5OEM-D-4V———
17Digital Input 4—W66—0.5OEM-D-4W———
18Sensor 5.0V C2————————
19Sensor 5.0V B2————————
2Analogue Temperature Input 6————————
20LIN Bus————————
21RS232 Receive————————
22RS232 Transmit————————
23Digital Input 1—W63—0.5OEM-D-4AA———
24Battery Negative 3—W10—0.85SP-GND-1———
25Battery Negative 4—W11—0.85SP-GND-1———
26Sensor 0V C1—W19—0.5SP-0V-1———
27Sensor 0V C2—W20—0.5SP-0V-1———
28CAN Bus 3 High————————
29CAN Bus 3 Low————————
3Analogue Voltage Input 15————————
30CAN Bus 2 High————————
31CAN Bus 2 Low————————
32Battery Negative 5—W12—0.85SP-GND-1———
33Sensor 0V B1—W21—0.5SP-0V-1———
34Sensor 0V A1—W22—0.5SP-0V-1———
4Analogue Voltage Input 16————————
5Analogue Voltage Input 17————————
6Low Side Ignition 9————————
7Low Side Ignition 10————————
8Low Side Ignition 11————————
9Low Side Ignition 12————————

M150-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Half Bridge Output 9————————
10Analogue Voltage Input 9————————
11Analogue Voltage Input 10————————
12Analogue Voltage Input 11————————
13Battery Positive—W3—0.85SP-14V-1———
14Low Side Injector 6—W43—0.5OEM-D-4G———
15Low Side Injector 4—W41—0.5OEM-D-4D———
16Analogue Voltage Input 12————————
17Analogue Voltage Input 13————————
18Analogue Voltage Input 14————————
19Battery Positive—W4—0.85SP-14V-1———
2Half Bridge Output 10————————
20Half Bridge Output 7————————
21Half Bridge Output 8————————
22Peak Hold Injector 9—W50—0.5OEM-A-1I———
23Peak Hold Injector 10—W51—0.5OEM-A-1K———
24Peak Hold Injector 11—W52—0.5OEM-A-1M———
25Peak Hold Injector 12—W53—0.5OEM-A-1O———
26Sensor 5.0V A————————
3Universal Digital Input 8————————
4Universal Digital Input 9————————
5Universal Digital Input 10————————
6Universal Digital Input 11————————
7Universal Digital Input 12————————
8Low Side Injector 5—W42—0.5OEM-D-4F———
9Low Side Injector 3—W40—0.5OEM-A-1H———

M150-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Half Bridge Output 2—W37—0.5OEM-A-1AE———
10Battery Negative 1—W13—0.85SP-GND-1———
11Battery Negative 2—W14—0.85SP-GND-1———
12Low Side Ignition 7————————
13Low Side Ignition 8————————
14Analogue Voltage Input 1—W55—0.5OEM-D-4AH———
15Analogue Voltage Input 2—W56—0.5OEM-C-3I———
16Analogue Voltage Input 3—W61—0.5OEM-C-3H———
17Analogue Voltage Input 4————————
18Half Bridge Output 1—W36—0.5OEM-A-1AA———
19Peak Hold Injector 1—W32—0.5OEM-A-1Q———
2Sensor 5.0V A————————
20Peak Hold Injector 2—W34—0.5OEM-A-1Y———
21Peak Hold Injector 3—W44—0.5OEM-D-4I———
22Peak Hold Injector 4—W45—0.5OEM-D-4K———
23Low Side Injector 1—W33—0.5OEM-A-1U———
24Low Side Injector 2—W35—0.5OEM-A-1AC———
25Analogue Voltage Input 5————————
26Battery Positive—W5—0.85SP-14V-1———
27Peak Hold Injector 5—W46—0.5OEM-D-4L———
28Peak Hold Injector 6—W47—0.5OEM-A-1C———
29Peak Hold Injector 7—W48—0.5OEM-A-1E———
3Low Side Ignition 1—W29—0.5OEM-D-4AF———
30Peak Hold Injector 8—W49—0.5OEM-A-1G———
31Half Bridge Output 3—W38—0.5OEM-A-1S———
32Half Bridge Output 4—W39—0.5OEM-A-1W———
33Half Bridge Output 5—W54—0.5OEM-C-3G———
34Half Bridge Output 6————————
4Low Side Ignition 2—W30—0.5OEM-D-4AJ———
5Low Side Ignition 3—W31—0.5OEM-D-4AN———
6Low Side Ignition 4————————
7Low Side Ignition 5————————
8Low Side Ignition 6————————
9Sensor 5.0V B————————

M150-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Universal Digital Input 1—W26—0.5OEM-C-3R———
10Universal Digital Input 5————————
11Universal Digital Input 6————————
12Battery Backup—W6—0.85OEM-D-4B———
13Knock Input 2————————
14Universal Digital Input 7————————
15Sensor 0V A—W23—0.5SP-0V-1———
16Sensor 0V B—W24—0.5SP-0V-1———
17CAN Bus 1 High————————
18CAN Bus 1 Low————————
19Sensor 6.3V————————
2Universal Digital Input 2—W27—0.5OEM-C-3U———
20Analogue Voltage Input 6————————
21Analogue Voltage Input 7————————
22Analogue Voltage Input 8————————
23Ethernet Transmit +————————
24Ethernet Transmit -————————
25Ethernet Receive +————————
26Ethernet Receive -————————
3Analogue Temperature Input 1—W58—0.5OEM-C-3W———
4Analogue Temperature Input 2—W59—0.5OEM-C-3T———
5Analogue Temperature Input 3—W60—0.5OEM-C-3V———
6Analogue Temperature Input 4————————
7Knock Input 1—W28—0.5OEM-C-3O———
8Universal Digital Input 3—W62—0.5OEM-D-4Q———
9Universal Digital Input 4————————

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1AAOMP stepper phase B1—W36—0.5M150-C-18———
1ABSensor ground—W15—0.5SP-0V-1———
1ACInjector 4 (rear secondary)—W35—0.5M150-C-24———
1AEOMP stepper phase A1—W37—0.5M150-C-1———
1AFPower ground—W7—0.85SP-GND-1———
1AJPower ground—W8—0.85SP-GND-1———
1CIdle speed control (ISC) solenoid—W47—0.5M150-C-28———
1ETurbo charge control solenoid—W48—0.5M150-C-29———
1GPurge solenoid—W49—0.5M150-C-30———
1HCooling fan relay (low speed)—W40—0.5M150-B-9———
1ITurbo charge relief solenoid—W50—0.5M150-B-22———
1KTurbo pre-control solenoid—W51—0.5M150-B-23———
1LPower ground—W9—0.85SP-GND-1———
1MTurbo control solenoid—W52—0.5M150-B-24———
1OBoost control solenoid—W53—0.5M150-B-25———
1QInjector 1 (front primary)—W32—0.5M150-C-19———
1SOMP stepper phase B2—W38—0.5M150-C-31———
1UInjector 2 (rear primary)—W33—0.5M150-C-23———
1WOMP stepper phase A2—W39—0.5M150-C-32———
1XSensor ground—W16—0.5SP-0V-1———
1YInjector 3 (front secondary)—W34—0.5M150-C-20———

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
3A+5V sensor supply—W25—0.5M150-A-10———
3ABSensor ground—W17—0.5SP-0V-1———
3DO2 sensor (narrowband)—W57—0.5M150-A-11———
3GFuel pressure regulator control (PRC) solenoid—W54—0.5M150-C-33———
3HOMP position sensor—W61—0.5M150-C-16———
3IThrottle position (TPS, full range)—W56—0.5M150-C-15———
3OKnock sensor—W28—0.5M150-D-7———
3RCrank position (CAS NE)—W26—0.5M150-D-1———
3SSensor ground (CAS)—W18—0.5SP-0V-1———
3TIntake air temperature (IAT)—W59—0.5M150-D-4———
3UHome position (CAS G)—W27—0.5M150-D-2———
3VFuel temperature—W60—0.5M150-D-5———
3WCoolant temperature (ECT)—W58—0.5M150-D-3———

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
4AECU main power (+12V via main relay/ECR)—W1—0.85SP-14V-1———
4AABrake pedal switch—W63—0.5M150-A-23———
4AFIgnition front trailing—W29—0.5M150-C-3———
4AHMAP sensor (PIM)—W55—0.5M150-C-14———
4AJIgnition rear trailing—W30—0.5M150-C-4———
4ANIgnition leading (wasted spark)—W31—0.5M150-C-5———
4BBattery constant (+12V)—W6—0.85M150-D-12———
4CIgnition switch / start signal————————
4DAir pump clutch relay—W41—0.5M150-B-15———
4EECU main power (+12V via main relay/ECR)—W2—0.85SP-14V-1———
4FFuel pump speed relay—W42—0.5M150-B-8———
4GFuel pump relay—W43—0.5M150-B-14———
4IA/C relay—W44—0.5M150-C-21———
4KCooling fan relay (low speed)—W45—0.5M150-C-22———
4LCooling fan relay (high speed)—W46—0.5M150-C-27———
4MTachometer output————————
4QVehicle speed sensor—W62—0.5M150-D-8———
4SClutch switch—W64—0.5M150-A-15———
4VA/C request—W65—0.5M150-A-16———
4WPower steering pressure switch—W66—0.5M150-A-17———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W15—0.5OEM-A-1AB———
1——W16—0.5OEM-A-1X———
1——W17—0.5OEM-C-3AB———
1——W18—0.5OEM-C-3S———
1——W19—0.5M150-A-26———
1——W20—0.5M150-A-27———
1——W21—0.5M150-A-33———
1——W22—0.5M150-A-34———
1——W23—0.5M150-D-15———
1——W24—0.5M150-D-16———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-D-4A———
1——W2—0.85OEM-D-4E———
1——W3—0.85M150-B-13———
1——W4—0.85M150-B-19———
1——W5—0.85M150-C-26———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W7—0.85OEM-A-1AF———
1——W8—0.85OEM-A-1AJ———
1——W9—0.85OEM-A-1L———
1——W10—0.85M150-A-24———
1——W11—0.85M150-A-25———
1——W12—0.85M150-A-32———
1——W13—0.85M150-C-10———
1——W14—0.85M150-C-11———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1AAOMP stepper phase B1hbridge_outM150-C-18Half Bridge Output 1hbridge_outsingle_source
OEM-A-1ABSensor groundsensor_groundM150-A-26 + M150-A-27 + M150-A-33 + M150-A-34 + M150-D-15 + M150-D-16Sensor 0V C1 + Sensor 0V C2 + Sensor 0V B1 + Sensor 0V A1 + Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-A-1ACInjector 4 (rear secondary)injector_outM150-C-24Low Side Injector 2injector_outsingle_source
OEM-A-1AEOMP stepper phase A1hbridge_outM150-C-1Half Bridge Output 2hbridge_outsingle_source
OEM-A-1AFPower groundgroundM150-A-24 + M150-A-25 + M150-A-32 + M150-C-10 + M150-C-11Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Battery Negative 1 + Battery Negative 2groundsingle_source
OEM-A-1AJPower groundgroundM150-A-24 + M150-A-25 + M150-A-32 + M150-C-10 + M150-C-11Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Battery Negative 1 + Battery Negative 2groundsingle_source
OEM-A-1CIdle speed control (ISC) solenoidlow_side_outM150-C-28Peak Hold Injector 6injector_outsingle_source
OEM-A-1ETurbo charge control solenoidlow_side_outM150-C-29Peak Hold Injector 7injector_outsingle_source
OEM-A-1GPurge solenoidlow_side_outM150-C-30Peak Hold Injector 8injector_outsingle_source
OEM-A-1HCooling fan relay (low speed)low_side_outM150-B-9Low Side Injector 3injector_outsingle_source
OEM-A-1ITurbo charge relief solenoidlow_side_outM150-B-22Peak Hold Injector 9injector_outsingle_source
OEM-A-1KTurbo pre-control solenoidlow_side_outM150-B-23Peak Hold Injector 10injector_outsingle_source
OEM-A-1LPower groundgroundM150-A-24 + M150-A-25 + M150-A-32 + M150-C-10 + M150-C-11Battery Negative 3 + Battery Negative 4 + Battery Negative 5 + Battery Negative 1 + Battery Negative 2groundsingle_source
OEM-A-1MTurbo control solenoidlow_side_outM150-B-24Peak Hold Injector 11injector_outsingle_source
OEM-A-1OBoost control solenoidlow_side_outM150-B-25Peak Hold Injector 12injector_outsingle_source
OEM-A-1QInjector 1 (front primary)injector_outM150-C-19Peak Hold Injector 1injector_outsingle_source
OEM-A-1SOMP stepper phase B2hbridge_outM150-C-31Half Bridge Output 3hbridge_outsingle_source
OEM-A-1UInjector 2 (rear primary)injector_outM150-C-23Low Side Injector 1injector_outsingle_source
OEM-A-1WOMP stepper phase A2hbridge_outM150-C-32Half Bridge Output 4hbridge_outsingle_source
OEM-A-1XSensor groundsensor_groundM150-A-26 + M150-A-27 + M150-A-33 + M150-A-34 + M150-D-15 + M150-D-16Sensor 0V C1 + Sensor 0V C2 + Sensor 0V B1 + Sensor 0V A1 + Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-A-1YInjector 3 (front secondary)injector_outM150-C-20Peak Hold Injector 2injector_outsingle_source
OEM-C-3A+5V sensor supplyvrefM150-A-10Sensor 5.0V C1vrefsingle_source
OEM-C-3ABSensor groundsensor_groundM150-A-26 + M150-A-27 + M150-A-33 + M150-A-34 + M150-D-15 + M150-D-16Sensor 0V C1 + Sensor 0V C2 + Sensor 0V B1 + Sensor 0V A1 + Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-C-3DO2 sensor (narrowband)lambda_nb_inM150-A-11Lambda Narrow Input 1lambda_nb_insingle_source
OEM-C-3GFuel pressure regulator control (PRC) solenoidlow_side_outM150-C-33Half Bridge Output 5hbridge_outsingle_source
OEM-C-3HOMP position sensoranalog_inM150-C-16Analogue Voltage Input 3analog_insingle_source
OEM-C-3IThrottle position (TPS, full range)analog_inM150-C-15Analogue Voltage Input 2analog_insingle_source
OEM-C-3OKnock sensorknock_inM150-D-7Knock Input 1knock_insingle_source
OEM-C-3RCrank position (CAS NE)trigger_inM150-D-1Universal Digital Input 1digital_insingle_source
OEM-C-3SSensor ground (CAS)sensor_groundM150-A-26 + M150-A-27 + M150-A-33 + M150-A-34 + M150-D-15 + M150-D-16Sensor 0V C1 + Sensor 0V C2 + Sensor 0V B1 + Sensor 0V A1 + Sensor 0V A + Sensor 0V Bsensor_groundsingle_source
OEM-C-3TIntake air temperature (IAT)temp_inM150-D-4Analogue Temperature Input 2temp_insingle_source
OEM-C-3UHome position (CAS G)trigger_inM150-D-2Universal Digital Input 2digital_insingle_source
OEM-C-3VFuel temperaturetemp_inM150-D-5Analogue Temperature Input 3temp_insingle_source
OEM-C-3WCoolant temperature (ECT)temp_inM150-D-3Analogue Temperature Input 1temp_insingle_source
OEM-D-4AECU main power (+12V via main relay/ECR)power_inM150-B-13 + M150-B-19 + M150-C-26Battery Positive + Battery Positive + Battery Positivepower_insingle_source
OEM-D-4AABrake pedal switchdigital_inM150-A-23Digital Input 1digital_insingle_source
OEM-D-4AFIgnition front trailingignition_outM150-C-3Low Side Ignition 1ignition_outsingle_source
OEM-D-4AHMAP sensor (PIM)analog_inM150-C-14Analogue Voltage Input 1analog_insingle_source
OEM-D-4AJIgnition rear trailingignition_outM150-C-4Low Side Ignition 2ignition_outsingle_source
OEM-D-4ANIgnition leading (wasted spark)ignition_outM150-C-5Low Side Ignition 3ignition_outsingle_source
OEM-D-4BBattery constant (+12V)power_inM150-D-12Battery Backuppower_insingle_source
OEM-D-4CIgnition switch / start signaldigital_in———single_source
OEM-D-4DAir pump clutch relaylow_side_outM150-B-15Low Side Injector 4injector_outsingle_source
OEM-D-4EECU main power (+12V via main relay/ECR)power_inM150-B-13 + M150-B-19 + M150-C-26Battery Positive + Battery Positive + Battery Positivepower_insingle_source
OEM-D-4FFuel pump speed relaylow_side_outM150-B-8Low Side Injector 5injector_outsingle_source
OEM-D-4GFuel pump relaylow_side_outM150-B-14Low Side Injector 6injector_outsingle_source
OEM-D-4IA/C relaylow_side_outM150-C-21Peak Hold Injector 3injector_outsingle_source
OEM-D-4KCooling fan relay (low speed)low_side_outM150-C-22Peak Hold Injector 4injector_outsingle_source
OEM-D-4LCooling fan relay (high speed)low_side_outM150-C-27Peak Hold Injector 5injector_outsingle_source
OEM-D-4MTachometer outputtacho_out———single_source
OEM-D-4QVehicle speed sensordigital_inM150-D-8Universal Digital Input 3digital_insingle_source
OEM-D-4SClutch switchdigital_inM150-A-15Digital Input 2digital_insingle_source
OEM-D-4VA/C requestdigital_inM150-A-16Digital Input 3digital_insingle_source
OEM-D-4WPower steering pressure switchdigital_inM150-A-17Digital Input 4digital_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)—
W3SP-14V-1M150-B-130.85no routeBattery Positive—
W4SP-14V-1M150-B-190.85no routeBattery Positive—
W5SP-14V-1M150-C-260.85no routeBattery Positive—
W6OEM-D-4BM150-D-120.85no routeBattery constant (+12V)—
W7OEM-A-1AFSP-GND-10.85no routePower ground—
W8OEM-A-1AJSP-GND-10.85no routePower ground—
W9OEM-A-1LSP-GND-10.85no routePower ground—
W10SP-GND-1M150-A-240.85no routeBattery Negative 3—
W11SP-GND-1M150-A-250.85no routeBattery Negative 4—
W12SP-GND-1M150-A-320.85no routeBattery Negative 5—
W13SP-GND-1M150-C-100.85no routeBattery Negative 1—
W14SP-GND-1M150-C-110.85no routeBattery Negative 2—
W15OEM-A-1ABSP-0V-10.5no routeSensor ground—
W16OEM-A-1XSP-0V-10.5no routeSensor ground—
W17OEM-C-3ABSP-0V-10.5no routeSensor ground—
W18OEM-C-3SSP-0V-10.5no routeSensor ground (CAS)—
W19SP-0V-1M150-A-260.5no routeSensor 0V C1—
W20SP-0V-1M150-A-270.5no routeSensor 0V C2—
W21SP-0V-1M150-A-330.5no routeSensor 0V B1—
W22SP-0V-1M150-A-340.5no routeSensor 0V A1—
W23SP-0V-1M150-D-150.5no routeSensor 0V A—
W24SP-0V-1M150-D-160.5no routeSensor 0V B—
W25OEM-C-3AM150-A-100.5no route+5V sensor supply—
W26OEM-C-3RM150-D-10.5no routeCrank position (CAS NE)—
W27OEM-C-3UM150-D-20.5no routeHome position (CAS G)—
W28OEM-C-3OM150-D-70.5no routeKnock sensor—
W29OEM-D-4AFM150-C-30.5no routeIgnition front trailing—
W30OEM-D-4AJM150-C-40.5no routeIgnition rear trailing—
W31OEM-D-4ANM150-C-50.5no routeIgnition leading (wasted spark)—
W32OEM-A-1QM150-C-190.5no routeInjector 1 (front primary)—
W33OEM-A-1UM150-C-230.5no routeInjector 2 (rear primary)—
W34OEM-A-1YM150-C-200.5no routeInjector 3 (front secondary)—
W35OEM-A-1ACM150-C-240.5no routeInjector 4 (rear secondary)—
W36OEM-A-1AAM150-C-180.5no routeOMP stepper phase B1—
W37OEM-A-1AEM150-C-10.5no routeOMP stepper phase A1—
W38OEM-A-1SM150-C-310.5no routeOMP stepper phase B2—
W39OEM-A-1WM150-C-320.5no routeOMP stepper phase A2—
W40OEM-A-1HM150-B-90.5no routeCooling fan relay (low speed)—
W41OEM-D-4DM150-B-150.5no routeAir pump clutch relay—
W42OEM-D-4FM150-B-80.5no routeFuel pump speed relay—
W43OEM-D-4GM150-B-140.5no routeFuel pump relay—
W44OEM-D-4IM150-C-210.5no routeA/C relay—
W45OEM-D-4KM150-C-220.5no routeCooling fan relay (low speed)—
W46OEM-D-4LM150-C-270.5no routeCooling fan relay (high speed)—
W47OEM-A-1CM150-C-280.5no routeIdle speed control (ISC) solenoid—
W48OEM-A-1EM150-C-290.5no routeTurbo charge control solenoid—
W49OEM-A-1GM150-C-300.5no routePurge solenoid—
W50OEM-A-1IM150-B-220.5no routeTurbo charge relief solenoid—
W51OEM-A-1KM150-B-230.5no routeTurbo pre-control solenoid—
W52OEM-A-1MM150-B-240.5no routeTurbo control solenoid—
W53OEM-A-1OM150-B-250.5no routeBoost control solenoid—
W54OEM-C-3GM150-C-330.5no routeFuel pressure regulator control (PRC) solenoid—
W55OEM-D-4AHM150-C-140.5no routeMAP sensor (PIM)—
W56OEM-C-3IM150-C-150.5no routeThrottle position (TPS, full range)—
W57OEM-C-3DM150-A-110.5no routeO2 sensor (narrowband)—
W58OEM-C-3WM150-D-30.5no routeCoolant temperature (ECT)—
W59OEM-C-3TM150-D-40.5no routeIntake air temperature (IAT)—
W60OEM-C-3VM150-D-50.5no routeFuel temperature—
W61OEM-C-3HM150-C-160.5no routeOMP position sensor—
W62OEM-D-4QM150-D-80.5no routeVehicle speed sensor—
W63OEM-D-4AAM150-A-230.5no routeBrake pedal switch—
W64OEM-D-4SM150-A-150.5no routeClutch switch—
W65OEM-D-4VM150-A-160.5no routeA/C request—
W66OEM-D-4WM150-A-170.5no routePower steering pressure switch—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (18)

SeverityCodeSubjectMessage
warnNET_FAMILYOEM-C-3G ↔ M150-C-33OEM-C-3G "Fuel pressure regulator control (PRC) solenoid" [low_side_out] is wired to M150-C-33 "Half Bridge Output 5" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-C-3R ↔ M150-D-1OEM-C-3R "Crank position (CAS NE)" [trigger_in] is wired to M150-D-1 "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 ↔ M150-D-2OEM-C-3U "Home position (CAS G)" [trigger_in] is wired to M150-D-2 "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-1C ↔ M150-C-28OEM-A-1C "Idle speed control (ISC) solenoid" [low_side_out] is wired to M150-C-28 "Peak Hold Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1E ↔ M150-C-29OEM-A-1E "Turbo charge control solenoid" [low_side_out] is wired to M150-C-29 "Peak Hold Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1G ↔ M150-C-30OEM-A-1G "Purge solenoid" [low_side_out] is wired to M150-C-30 "Peak Hold Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1H ↔ M150-B-9OEM-A-1H "Cooling fan relay (low speed)" [low_side_out] is wired to M150-B-9 "Low Side Injector 3" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1I ↔ M150-B-22OEM-A-1I "Turbo charge relief solenoid" [low_side_out] is wired to M150-B-22 "Peak Hold Injector 9" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1K ↔ M150-B-23OEM-A-1K "Turbo pre-control solenoid" [low_side_out] is wired to M150-B-23 "Peak Hold Injector 10" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1M ↔ M150-B-24OEM-A-1M "Turbo control solenoid" [low_side_out] is wired to M150-B-24 "Peak Hold Injector 11" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-A-1O ↔ M150-B-25OEM-A-1O "Boost control solenoid" [low_side_out] is wired to M150-B-25 "Peak Hold Injector 12" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-4D ↔ M150-B-15OEM-D-4D "Air pump clutch relay" [low_side_out] is wired to M150-B-15 "Low Side Injector 4" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-4F ↔ M150-B-8OEM-D-4F "Fuel pump speed relay" [low_side_out] is wired to M150-B-8 "Low Side Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-4G ↔ M150-B-14OEM-D-4G "Fuel pump relay" [low_side_out] is wired to M150-B-14 "Low Side Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-4I ↔ M150-C-21OEM-D-4I "A/C relay" [low_side_out] is wired to M150-C-21 "Peak Hold Injector 3" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-4K ↔ M150-C-22OEM-D-4K "Cooling fan relay (low speed)" [low_side_out] is wired to M150-C-22 "Peak Hold Injector 4" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-D-4L ↔ M150-C-27OEM-D-4L "Cooling fan relay (high speed)" [low_side_out] is wired to M150-C-27 "Peak Hold Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoUNMAPPEDOEM2 optional OEM pins are not mapped: OEM-D-4C Ignition switch / start signal; OEM-D-4M Tachometer output

Accepted (0)

CodeSubjectReasonBy

Notes

Fit check: needs add-on. Resolve these before building: - Sequential twin-turbo control needed; not documented for this ECU - 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 2026-10-11. Review every wire against both manuals before building. Not wired: - OEM-D 4C: Ignition switch / start signal: key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); MoTeC M150 has no dedicated key-on input - OEM-D 4M: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MoTeC M150

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
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
2forumdefreezemotorsport: MS3 FD3S 16-bit ECU pinouthttps://defreezemotorsport.ru/doku.php?id=ms3:fd3s162———