← Back

Honda NSX NA1 1991-2005 (C30A) → ECUMASTER EMU Black (auto)

Honda NSX NA1 1991-2005 (C30A) — ECUMASTER — EMU Black
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-08

Before you start

Statusdraft · not yet verified: nobody has reported building and running this harness
Open errorsnone
Size of the job66 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-25SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-C-1SP-14V-10.85☐☐☐☐☐☐☐
W3SP-14V-1EMUBLACK-Black-130.85☐☐☐☐☐☐☐
W4OEM-A-23SP-GND-10.85☐☐☐☐☐☐☐
W5OEM-A-24SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-B-2SP-GND-10.85☐☐☐☐☐☐☐
W7SP-GND-1EMUBLACK-Black-270.85☐☐☐☐☐☐☐
W8SP-GND-1EMUBLACK-Black-280.85☐☐☐☐☐☐☐
W9SP-GND-1EMUBLACK-Grey-170.85☐☐☐☐☐☐☐
W10SP-GND-1EMUBLACK-Grey-240.85☐☐☐☐☐☐☐
W11OEM-A-26SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-B-10SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-B-12SP-0V-10.5☐☐☐☐☐☐☐
W14OEM-B-14SP-0V-10.5☐☐☐☐☐☐☐
W15OEM-B-16SP-0V-10.5☐☐☐☐☐☐☐
W16OEM-D-21SP-0V-10.5☐☐☐☐☐☐☐
W17OEM-D-22SP-0V-10.5☐☐☐☐☐☐☐
W18SP-0V-1EMUBLACK-Black-290.5☐☐☐☐☐☐☐
W19SP-0V-1EMUBLACK-Black-380.5☐☐☐☐☐☐☐
W20SP-0V-1EMUBLACK-Black-390.5☐☐☐☐☐☐☐
W21OEM-D-18SP-5V1-10.5☐☐☐☐☐☐☐
W22OEM-D-19SP-5V1-10.5☐☐☐☐☐☐☐
W23OEM-D-20SP-5V1-10.5☐☐☐☐☐☐☐
W24SP-5V1-1EMUBLACK-Black-260.5☐☐☐☐☐☐☐
W25OEM-B-15EMUBLACK-Black-80.5☐☐☐☐☐☐☐
W26OEM-B-13EMUBLACK-Black-200.5☐☐☐☐☐☐☐
W27OEM-B-11EMUBLACK-Black-210.5☐☐☐☐☐☐☐
W28OEM-B-9EMUBLACK-Black-70.5☐☐☐☐☐☐☐
W29OEM-D-4EMUBLACK-Black-30.5☐☐☐☐☐☐☐
W30OEM-D-3EMUBLACK-Black-160.5☐☐☐☐☐☐☐
W31OEM-A-21EMUBLACK-Grey-80.5☐☐☐☐☐☐☐
W32OEM-A-22EMUBLACK-Grey-160.5☐☐☐☐☐☐☐
W33OEM-B-8EMUBLACK-Grey-90.5☐☐☐☐☐☐☐
W34OEM-B-6EMUBLACK-Black-140.5☐☐☐☐☐☐☐
W35OEM-B-4EMUBLACK-Black-10.5☐☐☐☐☐☐☐
W36OEM-B-3EMUBLACK-Grey-10.5☐☐☐☐☐☐☐
W37OEM-A-1EMUBLACK-Grey-70.5☐☐☐☐☐☐☐
W38OEM-A-3EMUBLACK-Grey-150.5☐☐☐☐☐☐☐
W39OEM-A-5EMUBLACK-Grey-230.5☐☐☐☐☐☐☐
W40OEM-A-2EMUBLACK-Grey-60.5☐☐☐☐☐☐☐
W41OEM-A-4EMUBLACK-Grey-140.5☐☐☐☐☐☐☐
W42OEM-A-6EMUBLACK-Grey-220.5☐☐☐☐☐☐☐
W43OEM-A-8EMUBLACK-Grey-210.5☐☐☐☐☐☐☐
W44OEM-A-15EMUBLACK-Grey-130.5☐☐☐☐☐☐☐
W45OEM-A-18EMUBLACK-Grey-50.5☐☐☐☐☐☐☐
W46OEM-A-7EMUBLACK-Grey-200.5☐☐☐☐☐☐☐
W47OEM-5-F5EMUBLACK-Grey-100.5☐☐☐☐☐☐☐
W48OEM-5-F7EMUBLACK-Grey-20.5☐☐☐☐☐☐☐
W49OEM-A-10EMUBLACK-Grey-190.5☐☐☐☐☐☐☐
W50OEM-A-12EMUBLACK-Grey-120.5☐☐☐☐☐☐☐
W51OEM-A-11EMUBLACK-Grey-40.5☐☐☐☐☐☐☐
W52OEM-A-13EMUBLACK-Grey-110.5☐☐☐☐☐☐☐
W53OEM-A-14EMUBLACK-Grey-30.5☐☐☐☐☐☐☐
W54OEM-D-17EMUBLACK-Black-310.5☐☐☐☐☐☐☐
W55OEM-D-11EMUBLACK-Black-180.5☐☐☐☐☐☐☐
W56OEM-D-14EMUBLACK-Black-40.5☐☐☐☐☐☐☐
W57OEM-D-16EMUBLACK-Black-170.5☐☐☐☐☐☐☐
W58OEM-D-13EMUBLACK-Black-320.5☐☐☐☐☐☐☐
W59OEM-D-15EMUBLACK-Black-50.5☐☐☐☐☐☐☐
W60OEM-D-12EMUBLACK-Black-300.5☐☐☐☐☐☐☐
W61OEM-C-2EMUBLACK-Black-100.5☐☐☐☐☐☐☐
W62OEM-D-9EMUBLACK-Black-230.5☐☐☐☐☐☐☐
W63OEM-5-F2EMUBLACK-Black-360.5☐☐☐☐☐☐☐
W64OEM-5-F4EMUBLACK-Black-350.5☐☐☐☐☐☐☐
W65OEM-B-7EMUBLACK-Black-370.5☐☐☐☐☐☐☐
W66OEM-C-11EMUBLACK-Black-90.5☐☐☐☐☐☐☐

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
1EMUBLACK-Black-13EMUBLACK-Black-29open (OL)+12 V supply must not touch sensor ground
2EMUBLACK-Black-13EMUBLACK-Black-26open (OL)+12 V supply must not touch 5 V sensor reference
3EMUBLACK-Black-27EMUBLACK-Black-13open (OL)power ground must not touch +12 V supply
4EMUBLACK-Black-27EMUBLACK-Black-26open (OL)power ground must not touch 5 V sensor reference
5EMUBLACK-Black-29EMUBLACK-Black-26open (OL)sensor ground must not touch 5 V sensor reference

Revisions

RevLabelByDate
No revisions yet.

Schematic

EMUBLACK-BlackEMUBLACK-GreyOEM-5OEM-AOEM-BOEM-COEM-DSP-0VSP-14VSP-5V1SP-GND

Connectors

EMUBLACK-Black

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition coil #5—W35—0.5OEM-B-4———
10Switch #1 In—W61—0.5OEM-C-2———
11RS232 TXD————————
12CAN H————————
13Battery +12V—W3—0.85SP-14V-1———
14Ignition coil #4—W34—0.5OEM-B-6———
15EGT in #2————————
16Knock Sensor in #2—W30—0.5OEM-D-3———
17Analog In #3—W57—0.5OEM-D-16———
18TPS In—W55—0.5OEM-D-11———
19WBO Ip————————
2EGT in #1————————
20VSS In—W26—0.5OEM-B-13———
21Camsync In #1—W27—0.5OEM-B-11———
22WBO Rcal————————
23Switch #2 In—W62—0.5OEM-D-9———
24RS232 RXD————————
25CAN L————————
26+5V supply—W24—0.5SP-5V1-1———
27Power Ground—W7—0.85SP-GND-1———
28Ecu Ground—W8—0.85SP-GND-1———
29Sensor Ground—W18—0.5SP-0V-1———
3Knock Sensor in #1—W29—0.5OEM-D-4———
30Analog In #4—W60—0.5OEM-D-12———
31Analog In #1—W54—0.5OEM-D-17———
32IAT In—W58—0.5OEM-D-13———
33WBO VGND————————
34+5V supply————————
35Analog In #5—W64—0.5OEM-5-F4———
36Switch #3 In—W63—0.5OEM-5-F2———
37Analog In #6—W65—0.5OEM-B-7———
38Sensor Ground—W19—0.5SP-0V-1———
39Sensor Ground—W20—0.5SP-0V-1———
4Analog In #2—W56—0.5OEM-D-14———
5CLT In—W59—0.5OEM-D-15———
6WBO Vs————————
7Camsync In #2—W28—0.5OEM-B-9———
8Primary trigger—W25—0.5OEM-B-15———
9Flex Fuel In—W66—0.5OEM-C-11———

EMUBLACK-Grey

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition coil #6—W36—0.5OEM-B-3———
10H-Bridge #1 Winding B—W47—0.5OEM-5-F5———
11H-Bridge #2 Winding B—W52—0.5OEM-A-13———
12AUX 5—W50—0.5OEM-A-12———
13AUX 2 / Injector #8—W44—0.5OEM-A-15———
14Injector #5—W41—0.5OEM-A-4———
15Injector #2—W38—0.5OEM-A-3———
16Ignition coil #2—W32—0.5OEM-A-22———
17Power Ground—W9—0.85SP-GND-1———
18Ignition +12V————————
19WBO Heater—W49—0.5OEM-A-10———
2H-Bridge #1 Winding A—W48—0.5OEM-5-F7———
20AUX 4 / Tacho—W46—0.5OEM-A-7———
21AUX 1 / Injector #7—W43—0.5OEM-A-8———
22Injector #6—W42—0.5OEM-A-6———
23Injector #3—W39—0.5OEM-A-5———
24Power Ground—W10—0.85SP-GND-1———
3H-Bridge #2 Winding A—W53—0.5OEM-A-14———
4AUX 6—W51—0.5OEM-A-11———
5AUX 3—W45—0.5OEM-A-18———
6Injector #4—W40—0.5OEM-A-2———
7Injector #1—W37—0.5OEM-A-1———
8Ignition coil #1—W31—0.5OEM-A-21———
9Ignition coil #3—W33—0.5OEM-B-8———

OEM-5

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
F2Front VTEC pressure switch—W63—0.5EMUBLACK-Black-36———
F4Rear VTEC pressure switch—W64—0.5EMUBLACK-Black-35———
F5Front VTEC solenoid valve—W47—0.5EMUBLACK-Grey-10———
F7Rear VTEC solenoid valve—W48—0.5EMUBLACK-Grey-2———

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 1—W37—0.5EMUBLACK-Grey-7———
10Front O2 sensor heater (HTCNTF)—W49—0.5EMUBLACK-Grey-19———
11EGR control solenoid—W51—0.5EMUBLACK-Grey-4———
12Rear O2 sensor heater (HTCNTR)—W50—0.5EMUBLACK-Grey-12———
13Check engine light (WARN)—W52—0.5EMUBLACK-Grey-11———
14Chamber volume control solenoid (BPS)—W53—0.5EMUBLACK-Grey-3———
15A/C clutch relay (ACC)—W44—0.5EMUBLACK-Grey-13———
18Radiator fan control (FANCNTR)—W45—0.5EMUBLACK-Grey-5———
2Injector 4—W40—0.5EMUBLACK-Grey-6———
20EVAP purge cut-off solenoid (PGS)————————
21Ignition coil 1—W31—0.5EMUBLACK-Grey-8———
22Ignition coil 2—W32—0.5EMUBLACK-Grey-16———
23Power ground (PG1)—W4—0.85SP-GND-1———
24Power ground (PG2)—W5—0.85SP-GND-1———
25ECU power (IGP1)—W1—0.85SP-14V-1———
26Sensor ground (LG1)—W11—0.5SP-0V-1———
3Injector 2—W38—0.5EMUBLACK-Grey-15———
4Injector 5—W41—0.5EMUBLACK-Grey-14———
5Injector 3—W39—0.5EMUBLACK-Grey-23———
6Injector 6—W42—0.5EMUBLACK-Grey-22———
7Main relay—W46—0.5EMUBLACK-Grey-20———
8Fuel pump relay 2 (FLR2)—W43—0.5EMUBLACK-Grey-21———
9Idle air control valve (IACV)————————

OEM-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10CYL 2M — CYP sensor 2 return—W12—0.5SP-0V-1———
11CYL 1P — CYP sensor 1 signal—W27—0.5EMUBLACK-Black-21———
12CYL 1M — CYP sensor 1 return—W13—0.5SP-0V-1———
13CRNK 2P — TDC sensor signal—W26—0.5EMUBLACK-Black-20———
14CRNK 2M — TDC sensor return—W14—0.5SP-0V-1———
15CRNK 1P — crank sensor signal—W25—0.5EMUBLACK-Black-8———
16CRNK 1M — crank sensor return—W15—0.5SP-0V-1———
2Chassis ground (LG2)—W6—0.85SP-GND-1———
3Ignition coil 6—W36—0.5EMUBLACK-Grey-1———
4Ignition coil 5—W35—0.5EMUBLACK-Black-1———
6Ignition coil 4—W34—0.5EMUBLACK-Black-14———
7Neutral switch (M/T) / gear position (A/T)—W65—0.5EMUBLACK-Black-37———
8Ignition coil 3—W33—0.5EMUBLACK-Grey-9———
9CYL 2P — CYP sensor 2 signal—W28—0.5EMUBLACK-Black-7———

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1ECU power (IGP2)—W2—0.85SP-14V-1———
10Traction control————————
11Starter switch (STS)—W66—0.5EMUBLACK-Black-9———
12Traction control————————
2Vehicle speed sensor (VSS)—W61—0.5EMUBLACK-Black-10———
3A/C switch (ACS)————————
4Tachometer output (NEP)————————
5A/C pressure switch (PDSW)————————
6Traction control————————
7Clutch switch (M/T)————————
8Traction control————————
9Service check connector (SCS)————————

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Battery backup (VBU)————————
11Throttle position sensor (TPS)—W55—0.5EMUBLACK-Black-18———
12EGR lift sensor (EGRL)—W60—0.5EMUBLACK-Black-30———
13Engine coolant temperature (ECT)—W58—0.5EMUBLACK-Black-32———
14Primary O2 sensor—W56—0.5EMUBLACK-Black-4———
15Intake air temperature (IAT)—W59—0.5EMUBLACK-Black-5———
16Secondary O2 sensor—W57—0.5EMUBLACK-Black-17———
17MAP sensor—W54—0.5EMUBLACK-Black-31———
18+5V sensor supply (VCC)—W21—0.5SP-5V1-1———
19+5V sensor supply (VCC)—W22—0.5SP-5V1-1———
20+5V sensor supply (VCC)—W23—0.5SP-5V1-1———
21Sensor ground (SG)—W16—0.5SP-0V-1———
22Sensor ground (SG)—W17—0.5SP-0V-1———
3Knock sensor — rear—W30—0.5EMUBLACK-Black-16———
4Knock sensor — front—W29—0.5EMUBLACK-Black-3———
5Traction control————————
6Fuel pump voltage monitor (VFP)————————
8Ignition timing adjuster (IGADJ)————————
9Alternator FR signal—W62—0.5EMUBLACK-Black-23———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-A-26———
1——W12—0.5OEM-B-10———
1——W13—0.5OEM-B-12———
1——W14—0.5OEM-B-14———
1——W15—0.5OEM-B-16———
1——W16—0.5OEM-D-21———
1——W17—0.5OEM-D-22———
1——W18—0.5EMUBLACK-Black-29———
1——W19—0.5EMUBLACK-Black-38———
1——W20—0.5EMUBLACK-Black-39———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-A-25———
1——W2—0.85OEM-C-1———
1——W3—0.85EMUBLACK-Black-13———

SP-5V1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W21—0.5OEM-D-18———
1——W22—0.5OEM-D-19———
1——W23—0.5OEM-D-20———
1——W24—0.5EMUBLACK-Black-26———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-A-23———
1——W5—0.85OEM-A-24———
1——W6—0.85OEM-B-2———
1——W7—0.85EMUBLACK-Black-27———
1——W8—0.85EMUBLACK-Black-28———
1——W9—0.85EMUBLACK-Grey-17———
1——W10—0.85EMUBLACK-Grey-24———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-5-F2Front VTEC pressure switchdigital_inEMUBLACK-Black-36Switch #3 Indigital_insingle_source
OEM-5-F4Rear VTEC pressure switchdigital_inEMUBLACK-Black-35Analog In #5analog_insingle_source
OEM-5-F5Front VTEC solenoid valvehigh_side_outEMUBLACK-Grey-10H-Bridge #1 Winding Bhbridge_outsingle_source
OEM-5-F7Rear VTEC solenoid valvehigh_side_outEMUBLACK-Grey-2H-Bridge #1 Winding Ahbridge_outsingle_source
OEM-A-1Injector 1injector_outEMUBLACK-Grey-7Injector #1injector_outsingle_source
OEM-A-10Front O2 sensor heater (HTCNTF)low_side_outEMUBLACK-Grey-19WBO Heaterlow_side_outsingle_source
OEM-A-11EGR control solenoidlow_side_outEMUBLACK-Grey-4AUX 6low_side_outsingle_source
OEM-A-12Rear O2 sensor heater (HTCNTR)low_side_outEMUBLACK-Grey-12AUX 5low_side_outsingle_source
OEM-A-13Check engine light (WARN)low_side_outEMUBLACK-Grey-11H-Bridge #2 Winding Bhbridge_outsingle_source
OEM-A-14Chamber volume control solenoid (BPS)low_side_outEMUBLACK-Grey-3H-Bridge #2 Winding Ahbridge_outsingle_source
OEM-A-15A/C clutch relay (ACC)low_side_outEMUBLACK-Grey-13AUX 2 / Injector #8low_side_outsingle_source
OEM-A-18Radiator fan control (FANCNTR)low_side_outEMUBLACK-Grey-5AUX 3low_side_outsingle_source
OEM-A-2Injector 4injector_outEMUBLACK-Grey-6Injector #4injector_outsingle_source
OEM-A-20EVAP purge cut-off solenoid (PGS)low_side_out———single_source
OEM-A-21Ignition coil 1ignition_outEMUBLACK-Grey-8Ignition coil #1ignition_outsingle_source
OEM-A-22Ignition coil 2ignition_outEMUBLACK-Grey-16Ignition coil #2ignition_outsingle_source
OEM-A-23Power ground (PG1)groundEMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24Power Ground + Ecu Ground + Power Ground + Power Groundgroundsingle_source
OEM-A-24Power ground (PG2)groundEMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24Power Ground + Ecu Ground + Power Ground + Power Groundgroundsingle_source
OEM-A-25ECU power (IGP1)power_inEMUBLACK-Black-13Battery +12Vpower_insingle_source
OEM-A-26Sensor ground (LG1)sensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-A-3Injector 2injector_outEMUBLACK-Grey-15Injector #2injector_outsingle_source
OEM-A-4Injector 5injector_outEMUBLACK-Grey-14Injector #5injector_outcorroborated
OEM-A-5Injector 3injector_outEMUBLACK-Grey-23Injector #3injector_outsingle_source
OEM-A-6Injector 6injector_outEMUBLACK-Grey-22Injector #6injector_outsingle_source
OEM-A-7Main relaylow_side_outEMUBLACK-Grey-20AUX 4 / Tacholow_side_outsingle_source
OEM-A-8Fuel pump relay 2 (FLR2)low_side_outEMUBLACK-Grey-21AUX 1 / Injector #7low_side_outsingle_source
OEM-A-9Idle air control valve (IACV)low_side_out———single_source
OEM-B-10CYL 2M — CYP sensor 2 returnsensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-B-11CYL 1P — CYP sensor 1 signaltrigger_inEMUBLACK-Black-21Camsync In #1trigger_insingle_source
OEM-B-12CYL 1M — CYP sensor 1 returnsensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-B-13CRNK 2P — TDC sensor signaltrigger_inEMUBLACK-Black-20VSS Indigital_insingle_source
OEM-B-14CRNK 2M — TDC sensor returnsensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-B-15CRNK 1P — crank sensor signaltrigger_inEMUBLACK-Black-8Primary triggertrigger_insingle_source
OEM-B-16CRNK 1M — crank sensor returnsensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-B-2Chassis ground (LG2)groundEMUBLACK-Black-27 + EMUBLACK-Black-28 + EMUBLACK-Grey-17 + EMUBLACK-Grey-24Power Ground + Ecu Ground + Power Ground + Power Groundgroundsingle_source
OEM-B-3Ignition coil 6ignition_outEMUBLACK-Grey-1Ignition coil #6ignition_outsingle_source
OEM-B-4Ignition coil 5ignition_outEMUBLACK-Black-1Ignition coil #5ignition_outsingle_source
OEM-B-6Ignition coil 4ignition_outEMUBLACK-Black-14Ignition coil #4ignition_outsingle_source
OEM-B-7Neutral switch (M/T) / gear position (A/T)digital_inEMUBLACK-Black-37Analog In #6analog_insingle_source
OEM-B-8Ignition coil 3ignition_outEMUBLACK-Grey-9Ignition coil #3ignition_outsingle_source
OEM-B-9CYL 2P — CYP sensor 2 signaltrigger_inEMUBLACK-Black-7Camsync In #2trigger_insingle_source
OEM-C-1ECU power (IGP2)power_inEMUBLACK-Black-13Battery +12Vpower_insingle_source
OEM-C-10Traction control————single_source
OEM-C-11Starter switch (STS)digital_inEMUBLACK-Black-9Flex Fuel Inanalog_insingle_source
OEM-C-12Traction control————single_source
OEM-C-2Vehicle speed sensor (VSS)digital_inEMUBLACK-Black-10Switch #1 Indigital_insingle_source
OEM-C-3A/C switch (ACS)digital_in———single_source
OEM-C-4Tachometer output (NEP)tacho_out———single_source
OEM-C-5A/C pressure switch (PDSW)digital_in———single_source
OEM-C-6Traction control————single_source
OEM-C-7Clutch switch (M/T)digital_in———single_source
OEM-C-8Traction control————single_source
OEM-C-9Service check connector (SCS)digital_in———single_source
OEM-D-1Battery backup (VBU)power_in———single_source
OEM-D-11Throttle position sensor (TPS)analog_inEMUBLACK-Black-18TPS Inanalog_insingle_source
OEM-D-12EGR lift sensor (EGRL)analog_inEMUBLACK-Black-30Analog In #4analog_insingle_source
OEM-D-13Engine coolant temperature (ECT)temp_inEMUBLACK-Black-32IAT Intemp_insingle_source
OEM-D-14Primary O2 sensorlambda_nb_inEMUBLACK-Black-4Analog In #2analog_insingle_source
OEM-D-15Intake air temperature (IAT)temp_inEMUBLACK-Black-5CLT Intemp_insingle_source
OEM-D-16Secondary O2 sensorlambda_nb_inEMUBLACK-Black-17Analog In #3analog_insingle_source
OEM-D-17MAP sensoranalog_inEMUBLACK-Black-31Analog In #1analog_insingle_source
OEM-D-18+5V sensor supply (VCC)vrefEMUBLACK-Black-26+5V supplyvrefsingle_source
OEM-D-19+5V sensor supply (VCC)vrefEMUBLACK-Black-26+5V supplyvrefsingle_source
OEM-D-20+5V sensor supply (VCC)vrefEMUBLACK-Black-26+5V supplyvrefsingle_source
OEM-D-21Sensor ground (SG)sensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-D-22Sensor ground (SG)sensor_groundEMUBLACK-Black-29 + EMUBLACK-Black-38 + EMUBLACK-Black-39Sensor Ground + Sensor Ground + Sensor Groundsensor_groundsingle_source
OEM-D-3Knock sensor — rearknock_inEMUBLACK-Black-16Knock Sensor in #2knock_insingle_source
OEM-D-4Knock sensor — frontknock_inEMUBLACK-Black-3Knock Sensor in #1knock_insingle_source
OEM-D-5Traction control————single_source
OEM-D-6Fuel pump voltage monitor (VFP)————corroborated
OEM-D-8Ignition timing adjuster (IGADJ)digital_in———single_source
OEM-D-9Alternator FR signaldigital_inEMUBLACK-Black-23Switch #2 Indigital_insingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-A-25SP-14V-10.85no routeECU power (IGP1)—
W2OEM-C-1SP-14V-10.85no routeECU power (IGP2)—
W3SP-14V-1EMUBLACK-Black-130.85no routeBattery +12V—
W4OEM-A-23SP-GND-10.85no routePower ground (PG1)—
W5OEM-A-24SP-GND-10.85no routePower ground (PG2)—
W6OEM-B-2SP-GND-10.85no routeChassis ground (LG2)—
W7SP-GND-1EMUBLACK-Black-270.85no routePower Ground—
W8SP-GND-1EMUBLACK-Black-280.85no routeEcu Ground—
W9SP-GND-1EMUBLACK-Grey-170.85no routePower Ground—
W10SP-GND-1EMUBLACK-Grey-240.85no routePower Ground—
W11OEM-A-26SP-0V-10.5no routeSensor ground (LG1)—
W12OEM-B-10SP-0V-10.5no routeCYL 2M — CYP sensor 2 return—
W13OEM-B-12SP-0V-10.5no routeCYL 1M — CYP sensor 1 return—
W14OEM-B-14SP-0V-10.5no routeCRNK 2M — TDC sensor return—
W15OEM-B-16SP-0V-10.5no routeCRNK 1M — crank sensor return—
W16OEM-D-21SP-0V-10.5no routeSensor ground (SG)—
W17OEM-D-22SP-0V-10.5no routeSensor ground (SG)—
W18SP-0V-1EMUBLACK-Black-290.5no routeSensor Ground—
W19SP-0V-1EMUBLACK-Black-380.5no routeSensor Ground—
W20SP-0V-1EMUBLACK-Black-390.5no routeSensor Ground—
W21OEM-D-18SP-5V1-10.5no route+5V sensor supply (VCC)—
W22OEM-D-19SP-5V1-10.5no route+5V sensor supply (VCC)—
W23OEM-D-20SP-5V1-10.5no route+5V sensor supply (VCC)—
W24SP-5V1-1EMUBLACK-Black-260.5no route+5V supply—
W25OEM-B-15EMUBLACK-Black-80.5no routeCRNK 1P — crank sensor signal—
W26OEM-B-13EMUBLACK-Black-200.5no routeCRNK 2P — TDC sensor signal—
W27OEM-B-11EMUBLACK-Black-210.5no routeCYL 1P — CYP sensor 1 signal—
W28OEM-B-9EMUBLACK-Black-70.5no routeCYL 2P — CYP sensor 2 signal—
W29OEM-D-4EMUBLACK-Black-30.5no routeKnock sensor — front—
W30OEM-D-3EMUBLACK-Black-160.5no routeKnock sensor — rear—
W31OEM-A-21EMUBLACK-Grey-80.5no routeIgnition coil 1—
W32OEM-A-22EMUBLACK-Grey-160.5no routeIgnition coil 2—
W33OEM-B-8EMUBLACK-Grey-90.5no routeIgnition coil 3—
W34OEM-B-6EMUBLACK-Black-140.5no routeIgnition coil 4—
W35OEM-B-4EMUBLACK-Black-10.5no routeIgnition coil 5—
W36OEM-B-3EMUBLACK-Grey-10.5no routeIgnition coil 6—
W37OEM-A-1EMUBLACK-Grey-70.5no routeInjector 1—
W38OEM-A-3EMUBLACK-Grey-150.5no routeInjector 2—
W39OEM-A-5EMUBLACK-Grey-230.5no routeInjector 3—
W40OEM-A-2EMUBLACK-Grey-60.5no routeInjector 4—
W41OEM-A-4EMUBLACK-Grey-140.5no routeInjector 5—
W42OEM-A-6EMUBLACK-Grey-220.5no routeInjector 6—
W43OEM-A-8EMUBLACK-Grey-210.5no routeFuel pump relay 2 (FLR2)—
W44OEM-A-15EMUBLACK-Grey-130.5no routeA/C clutch relay (ACC)—
W45OEM-A-18EMUBLACK-Grey-50.5no routeRadiator fan control (FANCNTR)—
W46OEM-A-7EMUBLACK-Grey-200.5no routeMain relay—
W47OEM-5-F5EMUBLACK-Grey-100.5no routeFront VTEC solenoid valve—
W48OEM-5-F7EMUBLACK-Grey-20.5no routeRear VTEC solenoid valve—
W49OEM-A-10EMUBLACK-Grey-190.5no routeFront O2 sensor heater (HTCNTF)—
W50OEM-A-12EMUBLACK-Grey-120.5no routeRear O2 sensor heater (HTCNTR)—
W51OEM-A-11EMUBLACK-Grey-40.5no routeEGR control solenoid—
W52OEM-A-13EMUBLACK-Grey-110.5no routeCheck engine light (WARN)—
W53OEM-A-14EMUBLACK-Grey-30.5no routeChamber volume control solenoid (BPS)—
W54OEM-D-17EMUBLACK-Black-310.5no routeMAP sensor—
W55OEM-D-11EMUBLACK-Black-180.5no routeThrottle position sensor (TPS)—
W56OEM-D-14EMUBLACK-Black-40.5no routePrimary O2 sensor—
W57OEM-D-16EMUBLACK-Black-170.5no routeSecondary O2 sensor—
W58OEM-D-13EMUBLACK-Black-320.5no routeEngine coolant temperature (ECT)—
W59OEM-D-15EMUBLACK-Black-50.5no routeIntake air temperature (IAT)—
W60OEM-D-12EMUBLACK-Black-300.5no routeEGR lift sensor (EGRL)—
W61OEM-C-2EMUBLACK-Black-100.5no routeVehicle speed sensor (VSS)—
W62OEM-D-9EMUBLACK-Black-230.5no routeAlternator FR signal—
W63OEM-5-F2EMUBLACK-Black-360.5no routeFront VTEC pressure switch—
W64OEM-5-F4EMUBLACK-Black-350.5no routeRear VTEC pressure switch—
W65OEM-B-7EMUBLACK-Black-370.5no routeNeutral switch (M/T) / gear position (A/T)—
W66OEM-C-11EMUBLACK-Black-90.5no routeStarter switch (STS)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (9)

SeverityCodeSubjectMessage
warnNET_FAMILYOEM-5-F4 ↔ EMUBLACK-Black-35OEM-5-F4 "Rear VTEC pressure switch" [digital_in] is wired to EMUBLACK-Black-35 "Analog In #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-5-F5 ↔ EMUBLACK-Grey-10OEM-5-F5 "Front VTEC solenoid valve" [high_side_out] is wired to EMUBLACK-Grey-10 "H-Bridge #1 Winding B" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way.
warnNET_FAMILYOEM-5-F7 ↔ EMUBLACK-Grey-2OEM-5-F7 "Rear VTEC solenoid valve" [high_side_out] is wired to EMUBLACK-Grey-2 "H-Bridge #1 Winding A" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way.
warnNET_FAMILYOEM-A-13 ↔ EMUBLACK-Grey-11OEM-A-13 "Check engine light (WARN)" [low_side_out] is wired to EMUBLACK-Grey-11 "H-Bridge #2 Winding B" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-A-14 ↔ EMUBLACK-Grey-3OEM-A-14 "Chamber volume control solenoid (BPS)" [low_side_out] is wired to EMUBLACK-Grey-3 "H-Bridge #2 Winding A" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-B-13 ↔ EMUBLACK-Black-20OEM-B-13 "CRNK 2P — TDC sensor signal" [trigger_in] is wired to EMUBLACK-Black-20 "VSS In" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
warnNET_FAMILYOEM-B-7 ↔ EMUBLACK-Black-37OEM-B-7 "Neutral switch (M/T) / gear position (A/T)" [digital_in] is wired to EMUBLACK-Black-37 "Analog In #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.
warnNET_FAMILYOEM-C-11 ↔ EMUBLACK-Black-9OEM-C-11 "Starter switch (STS)" [digital_in] is wired to EMUBLACK-Black-9 "Flex Fuel In" [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.
infoUNMAPPEDOEM14 optional OEM pins are not mapped: OEM-A-20 EVAP purge cut-off solenoid (PGS); OEM-A-9 Idle air control valve (IACV); OEM-C-10 Traction control; OEM-C-12 Traction control; OEM-C-3 A/C switch (ACS); OEM-C-4 Tachometer output (NEP); OEM-C-5 A/C pressure switch (PDSW); OEM-C-6 Traction control; OEM-C-7 Clutch switch (M/T); OEM-C-8 Traction control; OEM-C-9 Service check connector (SCS); OEM-D-5 Traction control; OEM-D-6 Fuel pump voltage monitor (VFP); OEM-D-8 Ignition timing adjuster (IGADJ)

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: unconfirmed. Confirm these before building: - Trigger pattern for Honda C30A not found in the ECU's docs (EMU Black change log Honda entries = FN2 / S2000 CAM#2 / S2000 coolant gauge — no C30A/C32B/NSX) Auto-mapped by auto_map() from the library pin data on 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-D 1: Battery backup (VBU): ECUMASTER EMU Black has no battery-constant input; not needed - OEM-A 20: EVAP purge cut-off solenoid (PGS): no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-A 9: Idle air control valve (IACV): no free low_side/ls_hs/injector/hbridge on ECUMASTER EMU Black - OEM-C 4: Tachometer output (NEP): no free tacho/frequency_out/low_side/ls_hs on ECUMASTER EMU Black - OEM-C 3: A/C switch (ACS): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-C 5: A/C pressure switch (PDSW): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-C 7: Clutch switch (M/T): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-C 9: Service check connector (SCS): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-D 8: Ignition timing adjuster (IGADJ): no free switch_in/frequency_in/analog_0_5 on ECUMASTER EMU Black - OEM-C 10: Traction control: not classified in the library; wire by hand - OEM-C 12: Traction control: not classified in the library; wire by hand - OEM-C 6: Traction control: not classified in the library; wire by hand - OEM-C 8: Traction control: not classified in the library; wire by hand - OEM-D 5: Traction control: not classified in the library; wire by hand - OEM-D 6: Fuel pump voltage monitor (VFP): not classified in the library; wire by hand - EMUBLACK-Grey 18: Ignition +12V: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docAEM EMS 30-1042 (Series 1) plug-and-play install manual — 1991-94 NSXhttps://fancy-craft.firebaseapp.com/NSX/report/ecu/EMS_-_30-1042.pdfarchive2026-10-050cad10bc64b5
4vendor_docECUMASTER EMU Black — pinout (Black 39-pin / Grey 24-pin)https://www.ecumaster.com/wp/wp-content/uploads/2020/05/EMU_Black_pinout.pdfarchive2026-10-05096b2b4df1bd
3vendor_docdodo-upgrades: Honda OBD1 V6 ECU pinouthttps://dodo-upgrades.nl/index.php/obd1-v6-pinouts/archive2026-10-05f9539af28904