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RSX Type-S 2002-04 (K20A2) → DTAFast T8+ (auto)

RSX Type-S 2002-04 (K20A2) — DTAFast — T8+
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-09

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 errors2: read the Findings page before cutting any wire
Size of the job63 wires · 10 connectors · 4 part lines
Tools715131-1 · wire strippers · multimeter · heat gun + heat-shrink
Terminals316836-1
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-2SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-A-3SP-14V-10.85☐☐☐☐☐☐☐
W3SP-14V-1T8-C1-310.85☐☐☐☐☐☐☐
W4OEM-A-23SP-GND-10.85☐☐☐☐☐☐☐
W5OEM-A-24SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-A-4SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-A-5SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-E-3SP-GND-10.85☐☐☐☐☐☐☐
W9SP-GND-1T8-C1-130.85☐☐☐☐☐☐☐
W10SP-GND-1T8-C1-140.85☐☐☐☐☐☐☐
W11OEM-A-10SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-A-11SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-E-4SP-0V-10.5☐☐☐☐☐☐☐
W14SP-0V-1T8-C2-210.5☐☐☐☐☐☐☐
W15SP-0V-1T8-C2-330.5☐☐☐☐☐☐☐
W16OEM-A-20T8-C2-240.5☐☐☐☐☐☐☐
W17OEM-A-21SP-5V1-10.5☐☐☐☐☐☐☐
W18OEM-E-5SP-5V1-10.5☐☐☐☐☐☐☐
W19SP-5V1-1T8-C2-90.5☐☐☐☐☐☐☐
W20OEM-A-7T8-C2-120.5☐☐☐☐☐☐☐
W21OEM-A-25T8-C2-220.5☐☐☐☐☐☐☐
W22OEM-A-26T8-C2-290.5☐☐☐☐☐☐☐
W23OEM-A-9T8-C3-310.5☐☐☐☐☐☐☐
W24OEM-A-30T8-C1-100.5☐☐☐☐☐☐☐
W25OEM-A-29T8-C1-180.5☐☐☐☐☐☐☐
W26OEM-A-28T8-C1-10.5☐☐☐☐☐☐☐
W27OEM-A-27T8-C1-260.5☐☐☐☐☐☐☐
W28OEM-B-5T8-C1-90.5☐☐☐☐☐☐☐
W29OEM-B-4T8-C1-170.5☐☐☐☐☐☐☐
W30OEM-B-3T8-C1-340.5☐☐☐☐☐☐☐
W31OEM-B-2T8-C1-250.5☐☐☐☐☐☐☐
W32OEM-E-7T8-C1-50.5☐☐☐☐☐☐☐
W33OEM-B-6T8-C1-40.5☐☐☐☐☐☐☐
W34OEM-E-1T8-C1-30.5☐☐☐☐☐☐☐
W35OEM-E-18T8-C3-220.5☐☐☐☐☐☐☐
W36OEM-E-8T8-C3-230.5☐☐☐☐☐☐☐
W37OEM-E-6T8-C3-90.5☐☐☐☐☐☐☐
W38OEM-A-1T8-C3-30.5☐☐☐☐☐☐☐
W39OEM-A-12T8-C3-240.5☐☐☐☐☐☐☐
W40OEM-B-15T8-C3-250.5☐☐☐☐☐☐☐
W41OEM-B-1T8-C3-100.5☐☐☐☐☐☐☐
W42OEM-B-18T8-C3-40.5☐☐☐☐☐☐☐
W43OEM-B-21T8-C3-280.5☐☐☐☐☐☐☐
W44OEM-B-23T8-C1-160.5☐☐☐☐☐☐☐
W45OEM-B-7T8-C1-150.5☐☐☐☐☐☐☐
W46OEM-E-21T8-C1-240.5☐☐☐☐☐☐☐
W47OEM-E-31T8-C1-230.5☐☐☐☐☐☐☐
W48OEM-A-6T8-C3-70.5☐☐☐☐☐☐☐
W49OEM-A-16T8-C3-120.5☐☐☐☐☐☐☐
W50OEM-A-19T8-C2-100.5☐☐☐☐☐☐☐
W51OEM-A-15T8-C2-10.5☐☐☐☐☐☐☐
W52OEM-E-2T8-C2-50.5☐☐☐☐☐☐☐
W53OEM-B-8T8-C2-70.5☐☐☐☐☐☐☐
W54OEM-B-17T8-C2-250.5☐☐☐☐☐☐☐
W55OEM-B-13T8-C2-60.5☐☐☐☐☐☐☐
W56OEM-E-14T8-C2-180.5☐☐☐☐☐☐☐
W57OEM-E-15T8-C2-190.5☐☐☐☐☐☐☐
W58OEM-A-18T8-C2-20.5☐☐☐☐☐☐☐
W59OEM-B-10T8-C2-40.5☐☐☐☐☐☐☐
W60OEM-B-9T8-C2-80.5☐☐☐☐☐☐☐
W61OEM-E-16T8-C2-110.5☐☐☐☐☐☐☐
W62OEM-E-20T8-C2-140.5☐☐☐☐☐☐☐
W63OEM-E-22T8-C2-150.5☐☐☐☐☐☐☐

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
1T8-C1-31T8-C1-13open (OL)+12 V supply must not touch power ground
2T8-C1-31T8-C2-21open (OL)+12 V supply must not touch sensor ground
3T8-C1-13T8-C2-24open (OL)power ground must not touch 5 V sensor reference
4T8-C1-13T8-C2-9open (OL)power ground must not touch 5 V sensor reference
5T8-C1-31T8-C2-24open (OL)+12 V supply must not touch 5 V sensor reference
6T8-C1-31T8-C2-9open (OL)+12 V supply must not touch 5 V sensor reference
7T8-C2-21T8-C2-24open (OL)sensor ground must not touch 5 V sensor reference
8T8-C2-21T8-C2-9open (OL)sensor ground must not touch 5 V sensor reference

If any reading doesn't match, stop and get help before powering up.

Revisions

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Schematic

OEM-AOEM-BOEM-ESP-0VSP-14VSP-5V1SP-GNDT8-C1T8-C2T8-C3

Connectors

OEM-A

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1A/F sensor heater control (AFSHTC)—W38—0.5T8-C3-3———
2Ignition power 2 (IGP2)—W1—0.85SP-14V-1———
3Ignition power 1 (IGP1)—W2—0.85SP-14V-1———
4Power ground 2 (PG2)—W6—0.85SP-GND-1———
5Power ground 1 (PG1)—W7—0.85SP-GND-1———
6A/F sensor + (AFS+, wideband Ip)—W48—0.5T8-C3-7———
7Crank position sensor (CKP)—W20—0.5T8-C2-12———
8—————————
9Knock sensor (KS)—W23—0.5T8-C3-31———
10Sensor ground 2 (SG2)—W11—0.5SP-0V-1———
11Sensor ground 1 (SG1)—W12—0.5SP-0V-1———
12Idle air control valve (IACV)—W39—0.5T8-C3-24———
13—————————
14—————————
15Throttle position sensor (TPS)—W51—0.5T8-C2-1———
16A/F sensor - (AFS-, wideband Vs)—W49—0.5T8-C3-12———
17—————————
18Vehicle speed sensor (VSS, M/T)—W58—0.5T8-C2-2———
19Manifold absolute pressure (MAP)—W50—0.5T8-C2-10———
20Sensor 5V supply 2 (VCC2)—W16—0.5T8-C2-24———
21Sensor 5V supply 1 (VCC1)—W17—0.5SP-5V1-1———
22A/F sensor heater supply (AFSHTC+)————————
23Logic ground 2 (LG2)—W4—0.85SP-GND-1———
24Logic ground 1 (LG1)—W5—0.85SP-GND-1———
25Camshaft position A (CMP A)—W21—0.5T8-C2-22———
26Camshaft position B (CMP B)—W22—0.5T8-C2-29———
27Ignition coil 4 (IGPLS4)—W27—0.5T8-C1-26———
28Ignition coil 3 (IGPLS3)—W26—0.5T8-C1-1———
29Ignition coil 2 (IGPLS2)—W25—0.5T8-C1-18———
30Ignition coil 1 (IGPLS1)—W24—0.5T8-C1-10———
31—————————

OEM-B

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1VTC oil control solenoid (+)—W41—0.5T8-C3-10———
2Injector 4 (INJ4)—W31—0.5T8-C1-25———
3Injector 3 (INJ3)—W30—0.5T8-C1-34———
4Injector 2 (INJ2)—W29—0.5T8-C1-17———
5Injector 1 (INJ1)—W28—0.5T8-C1-9———
6Radiator fan control (FANC)—W33—0.5T8-C1-4———
7Reverse lockout solenoid (RVS, Type-S)—W45—0.5T8-C1-15———
8Coolant temp sensor (ECT)—W53—0.5T8-C2-7———
9VTEC oil pressure switch (VTPSW)—W60—0.5T8-C2-8———
10Alternator L signal (ALTL)—W59—0.5T8-C2-4———
11—————————
12—————————
13Alternator FR signal (ALTF)—W55—0.5T8-C2-6———
14—————————
15VTEC solenoid (VTS)—W40—0.5T8-C3-25———
16—————————
17Intake air temp sensor (IAT)—W54—0.5T8-C2-25———
18Alternator control (ALTC)—W42—0.5T8-C3-4———
19—————————
20—————————
21Evap canister purge valve (PCS)—W43—0.5T8-C3-28———
22—————————
23VTC oil control solenoid (-)—W44—0.5T8-C1-16———
24—————————

OEM-E

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Immobilizer fuel pump relay (IMO FPR)—W34—0.5T8-C1-3———
2Secondary heated O2 sensor (SHO2S)—W52—0.5T8-C2-5———
3Logic ground 3 (LG3)—W8—0.85SP-GND-1———
4Sensor ground 3 (SG3)—W13—0.5SP-0V-1———
5Sensor 5V supply 3 (VCC3)—W18—0.5SP-5V1-1———
6Secondary O2 heater control (SO2SHTC)—W37—0.5T8-C3-9———
7Main relay control (MRLY)—W32—0.5T8-C1-5———
8A/F sensor heater relay control (AFSHTCR)—W36—0.5T8-C3-23———
9Ignition switch signal (IG1)————————
10—————————
11—————————
12—————————
13—————————
14Fuel tank pressure sensor (FTP)—W56—0.5T8-C2-18———
15Electrical load detector (ELD)—W57—0.5T8-C2-19———
16Power steering pressure switch (PSPSW)—W61—0.5T8-C2-11———
17—————————
18A/C clutch relay (ACC)—W35—0.5T8-C3-22———
19—————————
20Brake switch / interlock (2WBS)—W62—0.5T8-C2-14———
21Evap vent shut valve (VSV)—W46—0.5T8-C1-24———
22Brake switch (BKSW)—W63—0.5T8-C2-15———
23K-line (diagnostic)————————
24Multiplex communication (SEFMJ)————————
25—————————
26Engine speed pulse / tacho (NEP)————————
27Immobilizer code (IMOCD)————————
28—————————
29Service check signal (SCS)————————
30Write enable signal (WEN)————————
31Malfunction indicator lamp (MIL)—W47—0.5T8-C1-23———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-A-10———
1——W12—0.5OEM-A-11———
1——W13—0.5OEM-E-4———
1——W14—0.5T8-C2-21———
1——W15—0.5T8-C2-33———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W2—0.85OEM-A-3———
1——W1—0.85OEM-A-2———
1——W3—0.85T8-C1-31———

SP-5V1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W17—0.5OEM-A-21———
1——W18—0.5OEM-E-5———
1——W19—0.5T8-C2-9———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-A-23———
1——W5—0.85OEM-A-24———
1——W6—0.85OEM-A-4———
1——W7—0.85OEM-A-5———
1——W8—0.85OEM-E-3———
1——W9—0.85T8-C1-13———
1——W10—0.85T8-C1-14———

T8-C1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Coil 3—W26—0.5OEM-A-28———
10Coil 1—W24—0.5OEM-A-30———
11Coil 5————————
12Coil 7————————
13Power Ground 1—W9—0.85SP-GND-1———
14Power Ground 2—W10—0.85SP-GND-1———
15Injector 6—W45—0.5OEM-B-7———
16Injector 5—W44—0.5OEM-B-23———
17Injector 2—W29—0.5OEM-B-4———
18Coil 2—W25—0.5OEM-A-29———
19Coil 8————————
23Injector 8—W47—0.5OEM-E-31———
24Injector 7—W46—0.5OEM-E-21———
25Injector 4—W31—0.5OEM-B-2———
26Coil 4—W27—0.5OEM-A-27———
27Coil 6————————
3PWM 3—W34—0.5OEM-E-1———
31Ignition 12v In—W3—0.85SP-14V-1———
34Injector 3—W30—0.5OEM-B-3———
4PWM 2—W33—0.5OEM-B-6———
5PWM 1—W32—0.5OEM-E-7———
6Motor 1 +————————
7Motor 1 -————————
9Injector 1—W28—0.5OEM-B-5———

T8-C2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Analogue 2—W51—0.5OEM-A-15———
10Analogue 1—W50—0.5OEM-A-19———
11Digital 3—W61—0.5OEM-E-16———
12Crank—W20—0.5OEM-A-7———
13Analogue 12————————
14Digital 4—W62—0.5OEM-E-20———
15Digital 5—W63—0.5OEM-E-22———
16Analogue 11————————
17Thermistor 3————————
18Analogue 5—W56—0.5OEM-E-14———
19Analogue 6—W57—0.5OEM-E-15———
2Wheel 1—W58—0.5OEM-A-18———
20Wheel 2————————
21Sensor Ground—W14—0.5SP-0V-1———
22Cam 1—W21—0.5OEM-A-25———
245v Output—W16—0.5OEM-A-20———
25Thermistor 2—W54—0.5OEM-B-17———
26CAN High————————
27Digital 6————————
28CAN Low————————
29Cam 2—W22—0.5OEM-A-26———
3Analogue 10————————
31Wheel 3————————
32Wheel 4————————
33Sensor Ground—W15—0.5SP-0V-1———
34Analogue 9————————
4Digital 1—W59—0.5OEM-B-10———
5Analogue 3—W52—0.5OEM-E-2———
6Analogue 4—W55—0.5OEM-B-13———
7Thermistor 1—W53—0.5OEM-B-8———
8Digital 2—W60—0.5OEM-B-9———
95v Output—W19—0.5SP-5V1-1———

T8-C3

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Lambda 2 Pump Current————————
10PWM 8—W41—0.5OEM-B-1———
11Lambda 1 Trim Resistor————————
12Lambda 1 Nernst Voltage—W49—0.5OEM-A-16———
17Analogue 7————————
18Analogue 8————————
2Lambda 2 VGND————————
22PWM 4—W35—0.5OEM-E-18———
23PWM 5—W36—0.5OEM-E-8———
24PWM 6—W39—0.5OEM-A-12———
25PWM 7—W40—0.5OEM-B-15———
26Permanent 12v————————
27Permanent 12v————————
28PWM 10—W43—0.5OEM-B-21———
3Lambda 2 Heater Negative—W38—0.5OEM-A-1———
31Knock 1—W23—0.5OEM-A-9———
32Knock 2————————
33CAN 2 High————————
34CAN 2 Low————————
4PWM 9—W42—0.5OEM-B-18———
5Lambda 2 Trim Resistor————————
6Lambda 2 Nernst Voltage————————
7Lambda 1 Pump Current—W48—0.5OEM-A-6———
8Lambda 1 VGND————————
9Lambda 1 Heater Negative—W37—0.5OEM-E-6———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1A/F sensor heater control (AFSHTC)low_side_outT8-C3-3Lambda 2 Heater Negativelow_side_outsingle_source
OEM-A-10Sensor ground 2 (SG2)sensor_groundT8-C2-21 + T8-C2-33Sensor Ground + Sensor Groundsensor_groundcorroborated
OEM-A-11Sensor ground 1 (SG1)sensor_groundT8-C2-21 + T8-C2-33Sensor Ground + Sensor Groundsensor_groundcorroborated
OEM-A-12Idle air control valve (IACV)low_side_outT8-C3-24PWM 6low_side_outcorroborated
OEM-A-15Throttle position sensor (TPS)analog_inT8-C2-1Analogue 2analog_incorroborated
OEM-A-16A/F sensor - (AFS-, wideband Vs)wb_vsT8-C3-12Lambda 1 Nernst Voltagewb_vssingle_source
OEM-A-18Vehicle speed sensor (VSS, M/T)digital_inT8-C2-2Wheel 1digital_incorroborated
OEM-A-19Manifold absolute pressure (MAP)analog_inT8-C2-10Analogue 1analog_incorroborated
OEM-A-2Ignition power 2 (IGP2)power_inT8-C1-31Ignition 12v Inpower_incorroborated
OEM-A-20Sensor 5V supply 2 (VCC2)vrefT8-C2-245v Outputvrefcorroborated
OEM-A-21Sensor 5V supply 1 (VCC1)vrefT8-C2-95v Outputvrefcorroborated
OEM-A-22A/F sensor heater supply (AFSHTC+)power_out———single_source
OEM-A-23Logic ground 2 (LG2)groundT8-C1-13 + T8-C1-14Power Ground 1 + Power Ground 2groundcorroborated
OEM-A-24Logic ground 1 (LG1)groundT8-C1-13 + T8-C1-14Power Ground 1 + Power Ground 2groundcorroborated
OEM-A-25Camshaft position A (CMP A)trigger_inT8-C2-22Cam 1trigger_insingle_source
OEM-A-26Camshaft position B (CMP B)trigger_inT8-C2-29Cam 2trigger_insingle_source
OEM-A-27Ignition coil 4 (IGPLS4)ignition_outT8-C1-26Coil 4ignition_outcorroborated
OEM-A-28Ignition coil 3 (IGPLS3)ignition_outT8-C1-1Coil 3ignition_outcorroborated
OEM-A-29Ignition coil 2 (IGPLS2)ignition_outT8-C1-18Coil 2ignition_outcorroborated
OEM-A-3Ignition power 1 (IGP1)power_inT8-C1-31Ignition 12v Inpower_incorroborated
OEM-A-30Ignition coil 1 (IGPLS1)ignition_outT8-C1-10Coil 1ignition_outcorroborated
OEM-A-4Power ground 2 (PG2)groundT8-C1-13 + T8-C1-14Power Ground 1 + Power Ground 2groundcorroborated
OEM-A-5Power ground 1 (PG1)groundT8-C1-13 + T8-C1-14Power Ground 1 + Power Ground 2groundcorroborated
OEM-A-6A/F sensor + (AFS+, wideband Ip)wb_ipT8-C3-7Lambda 1 Pump Currentwb_ipsingle_source
OEM-A-7Crank position sensor (CKP)trigger_inT8-C2-12Cranktrigger_incorroborated
OEM-A-9Knock sensor (KS)knock_inT8-C3-31Knock 1knock_incorroborated
OEM-B-1VTC oil control solenoid (+)low_side_outT8-C3-10PWM 8low_side_outcorroborated
OEM-B-10Alternator L signal (ALTL)digital_inT8-C2-4Digital 1digital_insingle_source
OEM-B-13Alternator FR signal (ALTF)analog_inT8-C2-6Analogue 4analog_insingle_source
OEM-B-15VTEC solenoid (VTS)low_side_outT8-C3-25PWM 7low_side_outsingle_source
OEM-B-17Intake air temp sensor (IAT)temp_inT8-C2-25Thermistor 2temp_incorroborated
OEM-B-18Alternator control (ALTC)low_side_outT8-C3-4PWM 9low_side_outcorroborated
OEM-B-2Injector 4 (INJ4)injector_outT8-C1-25Injector 4injector_outcorroborated
OEM-B-21Evap canister purge valve (PCS)low_side_outT8-C3-28PWM 10low_side_outcorroborated
OEM-B-23VTC oil control solenoid (-)low_side_outT8-C1-16Injector 5injector_outcorroborated
OEM-B-3Injector 3 (INJ3)injector_outT8-C1-34Injector 3injector_outcorroborated
OEM-B-4Injector 2 (INJ2)injector_outT8-C1-17Injector 2injector_outcorroborated
OEM-B-5Injector 1 (INJ1)injector_outT8-C1-9Injector 1injector_outcorroborated
OEM-B-6Radiator fan control (FANC)low_side_outT8-C1-4PWM 2low_side_outcorroborated
OEM-B-7Reverse lockout solenoid (RVS, Type-S)low_side_outT8-C1-15Injector 6injector_outcorroborated
OEM-B-8Coolant temp sensor (ECT)temp_inT8-C2-7Thermistor 1temp_incorroborated
OEM-B-9VTEC oil pressure switch (VTPSW)digital_inT8-C2-8Digital 2digital_incorroborated
OEM-E-1Immobilizer fuel pump relay (IMO FPR)low_side_outT8-C1-3PWM 3low_side_outcorroborated
OEM-E-14Fuel tank pressure sensor (FTP)analog_inT8-C2-18Analogue 5analog_incorroborated
OEM-E-15Electrical load detector (ELD)analog_inT8-C2-19Analogue 6analog_incorroborated
OEM-E-16Power steering pressure switch (PSPSW)digital_inT8-C2-11Digital 3digital_incorroborated
OEM-E-18A/C clutch relay (ACC)low_side_outT8-C3-22PWM 4low_side_outcorroborated
OEM-E-2Secondary heated O2 sensor (SHO2S)lambda_nb_inT8-C2-5Analogue 3analog_incorroborated
OEM-E-20Brake switch / interlock (2WBS)digital_inT8-C2-14Digital 4digital_insingle_source
OEM-E-21Evap vent shut valve (VSV)low_side_outT8-C1-24Injector 7injector_outcorroborated
OEM-E-22Brake switch (BKSW)digital_inT8-C2-15Digital 5digital_incorroborated
OEM-E-23K-line (diagnostic)serial———single_source
OEM-E-24Multiplex communication (SEFMJ)serial———corroborated
OEM-E-26Engine speed pulse / tacho (NEP)tacho_out———corroborated
OEM-E-27Immobilizer code (IMOCD)————single_source
OEM-E-29Service check signal (SCS)————single_source
OEM-E-3Logic ground 3 (LG3)groundT8-C1-13 + T8-C1-14Power Ground 1 + Power Ground 2groundcorroborated
OEM-E-30Write enable signal (WEN)————single_source
OEM-E-31Malfunction indicator lamp (MIL)low_side_outT8-C1-23Injector 8injector_outcorroborated
OEM-E-4Sensor ground 3 (SG3)sensor_groundT8-C2-21 + T8-C2-33Sensor Ground + Sensor Groundsensor_groundcorroborated
OEM-E-5Sensor 5V supply 3 (VCC3)vrefT8-C2-95v Outputvrefcorroborated
OEM-E-6Secondary O2 heater control (SO2SHTC)low_side_outT8-C3-9Lambda 1 Heater Negativelow_side_outcorroborated
OEM-E-7Main relay control (MRLY)low_side_outT8-C1-5PWM 1low_side_outcorroborated
OEM-E-8A/F sensor heater relay control (AFSHTCR)low_side_outT8-C3-23PWM 5low_side_outcorroborated
OEM-E-9Ignition switch signal (IG1)digital_in———corroborated

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-A-2SP-14V-10.85no routeIgnition power 2 (IGP2)—
W2OEM-A-3SP-14V-10.85no routeIgnition power 1 (IGP1)—
W3SP-14V-1T8-C1-310.85no routeIgnition 12v In—
W4OEM-A-23SP-GND-10.85no routeLogic ground 2 (LG2)—
W5OEM-A-24SP-GND-10.85no routeLogic ground 1 (LG1)—
W6OEM-A-4SP-GND-10.85no routePower ground 2 (PG2)—
W7OEM-A-5SP-GND-10.85no routePower ground 1 (PG1)—
W8OEM-E-3SP-GND-10.85no routeLogic ground 3 (LG3)—
W9SP-GND-1T8-C1-130.85no routePower Ground 1—
W10SP-GND-1T8-C1-140.85no routePower Ground 2—
W11OEM-A-10SP-0V-10.5no routeSensor ground 2 (SG2)—
W12OEM-A-11SP-0V-10.5no routeSensor ground 1 (SG1)—
W13OEM-E-4SP-0V-10.5no routeSensor ground 3 (SG3)—
W14SP-0V-1T8-C2-210.5no routeSensor Ground—
W15SP-0V-1T8-C2-330.5no routeSensor Ground—
W16OEM-A-20T8-C2-240.5no routeSensor 5V supply 2 (VCC2)—
W17OEM-A-21SP-5V1-10.5no routeSensor 5V supply 1 (VCC1)—
W18OEM-E-5SP-5V1-10.5no routeSensor 5V supply 3 (VCC3)—
W19SP-5V1-1T8-C2-90.5no route5v Output—
W20OEM-A-7T8-C2-120.5no routeCrank position sensor (CKP)—
W21OEM-A-25T8-C2-220.5no routeCamshaft position A (CMP A)—
W22OEM-A-26T8-C2-290.5no routeCamshaft position B (CMP B)—
W23OEM-A-9T8-C3-310.5no routeKnock sensor (KS)—
W24OEM-A-30T8-C1-100.5no routeIgnition coil 1 (IGPLS1)—
W25OEM-A-29T8-C1-180.5no routeIgnition coil 2 (IGPLS2)—
W26OEM-A-28T8-C1-10.5no routeIgnition coil 3 (IGPLS3)—
W27OEM-A-27T8-C1-260.5no routeIgnition coil 4 (IGPLS4)—
W28OEM-B-5T8-C1-90.5no routeInjector 1 (INJ1)—
W29OEM-B-4T8-C1-170.5no routeInjector 2 (INJ2)—
W30OEM-B-3T8-C1-340.5no routeInjector 3 (INJ3)—
W31OEM-B-2T8-C1-250.5no routeInjector 4 (INJ4)—
W32OEM-E-7T8-C1-50.5no routeMain relay control (MRLY)—
W33OEM-B-6T8-C1-40.5no routeRadiator fan control (FANC)—
W34OEM-E-1T8-C1-30.5no routeImmobilizer fuel pump relay (IMO FPR)—
W35OEM-E-18T8-C3-220.5no routeA/C clutch relay (ACC)—
W36OEM-E-8T8-C3-230.5no routeA/F sensor heater relay control (AFSHTCR)—
W37OEM-E-6T8-C3-90.5no routeSecondary O2 heater control (SO2SHTC)—
W38OEM-A-1T8-C3-30.5no routeA/F sensor heater control (AFSHTC)—
W39OEM-A-12T8-C3-240.5no routeIdle air control valve (IACV)—
W40OEM-B-15T8-C3-250.5no routeVTEC solenoid (VTS)—
W41OEM-B-1T8-C3-100.5no routeVTC oil control solenoid (+)—
W42OEM-B-18T8-C3-40.5no routeAlternator control (ALTC)—
W43OEM-B-21T8-C3-280.5no routeEvap canister purge valve (PCS)—
W44OEM-B-23T8-C1-160.5no routeVTC oil control solenoid (-)—
W45OEM-B-7T8-C1-150.5no routeReverse lockout solenoid (RVS, Type-S)—
W46OEM-E-21T8-C1-240.5no routeEvap vent shut valve (VSV)—
W47OEM-E-31T8-C1-230.5no routeMalfunction indicator lamp (MIL)—
W48OEM-A-6T8-C3-70.5no routeA/F sensor + (AFS+, wideband Ip)—
W49OEM-A-16T8-C3-120.5no routeA/F sensor - (AFS-, wideband Vs)—
W50OEM-A-19T8-C2-100.5no routeManifold absolute pressure (MAP)—
W51OEM-A-15T8-C2-10.5no routeThrottle position sensor (TPS)—
W52OEM-E-2T8-C2-50.5no routeSecondary heated O2 sensor (SHO2S)—
W53OEM-B-8T8-C2-70.5no routeCoolant temp sensor (ECT)—
W54OEM-B-17T8-C2-250.5no routeIntake air temp sensor (IAT)—
W55OEM-B-13T8-C2-60.5no routeAlternator FR signal (ALTF)—
W56OEM-E-14T8-C2-180.5no routeFuel tank pressure sensor (FTP)—
W57OEM-E-15T8-C2-190.5no routeElectrical load detector (ELD)—
W58OEM-A-18T8-C2-20.5no routeVehicle speed sensor (VSS, M/T)—
W59OEM-B-10T8-C2-40.5no routeAlternator L signal (ALTL)—
W60OEM-B-9T8-C2-80.5no routeVTEC oil pressure switch (VTPSW)—
W61OEM-E-16T8-C2-110.5no routePower steering pressure switch (PSPSW)—
W62OEM-E-20T8-C2-140.5no routeBrake switch / interlock (2WBS)—
W63OEM-E-22T8-C2-150.5no routeBrake switch (BKSW)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit
connector1318682-6TEK-series ECU harness plug A (040-3 HD plug assy, 31P)1.000ea
connector353029-1TEK-series ECU harness plug B (040 H/D-3 plug HSG assy, 24P)1.000ea
connector353826-1TEK-series ECU harness plug E (040 HD 31P plug HSG assy-B, 31P)1.000ea
terminal316836-1TEMultilock 040 III HD socket, tin, 22–18 AWG (0.3–0.85 mm²)57.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (15)

SeverityCodeSubjectMessage
errorPHYS_REQUIRED_OPENT8-C3-26T8-C3-26 "Permanent 12v" is required but not wired.
errorPHYS_REQUIRED_OPENT8-C3-27T8-C3-27 "Permanent 12v" is required but not wired.
warnDATASET_GAPRSX ECU A5 of 31 cavities on RSX ECU A have no pin data (8,13,14,17,31). Anything there is invisible to these checks.
warnDATASET_GAPRSX ECU B8 of 24 cavities on RSX ECU B have no pin data (11,12,14,16,19,20,22,24). Anything there is invisible to these checks.
warnDATASET_GAPRSX ECU E8 of 31 cavities on RSX ECU E have no pin data (10,11,12,13,17,19,25,28). Anything there is invisible to these checks.
warnLOAD_UNKNOWNT8-C1-17T8-C1-17 "Injector 2" drives OEM-B-4 Injector 2 (INJ2) (load 1.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNT8-C1-25T8-C1-25 "Injector 4" drives OEM-B-2 Injector 4 (INJ4) (load 1.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNT8-C1-34T8-C1-34 "Injector 3" drives OEM-B-3 Injector 3 (INJ3) (load 1.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNT8-C1-9T8-C1-9 "Injector 1" drives OEM-B-5 Injector 1 (INJ1) (load 1.2 A) but its current rating is unknown. Check the ECU manual.
warnSUPPLY_GROUPOEM-A-21 + OEM-E-5 + SP-5V1-1 + T8-C2-9Supplies meant to stay independent share one net: OEM-A-21 [k_vcc1], OEM-E-5 [k_vcc3]. The new ECU has no free 5 V reference, so they share one: normal on a standalone, but a short on any of these sensors drops them all.
infoNET_FAMILYOEM-B-23 ↔ T8-C1-16OEM-B-23 "VTC oil control solenoid (-)" [low_side_out] is wired to T8-C1-16 "Injector 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-B-7 ↔ T8-C1-15OEM-B-7 "Reverse lockout solenoid (RVS, Type-S)" [low_side_out] is wired to T8-C1-15 "Injector 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-E-21 ↔ T8-C1-24OEM-E-21 "Evap vent shut valve (VSV)" [low_side_out] is wired to T8-C1-24 "Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-E-31 ↔ T8-C1-23OEM-E-31 "Malfunction indicator lamp (MIL)" [low_side_out] is wired to T8-C1-23 "Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoUNMAPPEDOEM8 optional OEM pins are not mapped: OEM-A-22 A/F sensor heater supply (AFSHTC+); OEM-E-23 K-line (diagnostic); OEM-E-24 Multiplex communication (SEFMJ); OEM-E-26 Engine speed pulse / tacho (NEP); OEM-E-27 Immobilizer code (IMOCD); OEM-E-29 Service check signal (SCS); OEM-E-30 Write enable signal (WEN); OEM-E-9 Ignition switch signal (IG1)

Accepted (0)

CodeSubjectReasonBy

Notes

Auto-mapped by auto_map() from the library pin data on 2026-10-09. Review every wire against both manuals before building. Open items: - T8-C3 26: Permanent 12v: required by DTAFast T8+ but no stock pin feeds it; wire by hand - T8-C3 27: Permanent 12v: required by DTAFast T8+ but no stock pin feeds it; wire by hand Not wired: - OEM-E 9: Ignition switch signal (IG1): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); DTAFast T8+ has no dedicated key-on input - OEM-E 26: Engine speed pulse / tacho (NEP): no free tacho/frequency_out/low_side/ls_hs on DTAFast T8+ - OEM-A 22: A/F sensor heater supply (AFSHTC+): no free heater_feed on DTAFast T8+ - OEM-E 23: K-line (diagnostic): no free k_line on DTAFast T8+ - OEM-E 24: Multiplex communication (SEFMJ): no free k_line on DTAFast T8+ - OEM-E 27: Immobilizer code (IMOCD): not classified in the library; wire by hand - OEM-E 29: Service check signal (SCS): not classified in the library; wire by hand - OEM-E 30: Write enable signal (WEN): not classified in the library; wire by hand

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docDTAFast T8+ ECU wiring diagramhttps://cdn.shopify.com/s/files/1/0848/7508/4108/files/T8PLUS_Wiring-Diagram.pdf?v=1728572013———
4vendor_docLink: CIVICLink K20X (HC20X) DC5 installation manualhttps://linkecu.com/documentation/237-4000%20DC5.pdfarchive2026-10-058a1a71301571
3forumFFS TechNet: K-series 02-06 RSX ECU pin diagram (Helm)https://ff-squad.com/technet2/k-series-02-06-rsx-ecu-pin-diagram/archive2026-10-05b2b85002666e