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RSX Type-S 2002-04 (K20A2) → Haltech Elite 2500 HT-151300 (auto)

RSX Type-S 2002-04 (K20A2) — Haltech — Elite 2500
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-08

Before you start

Statusproposal · not yet verified: nobody has reported building and running this harness
Open errorsnone
Size of the job65 wires · 9 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-1ELITE2500-A-260.85☐☐☐☐☐☐☐
W4SP-14V-1ELITE2500-B-110.85☐☐☐☐☐☐☐
W5OEM-A-23SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-A-24SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-A-4SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-A-5SP-GND-10.85☐☐☐☐☐☐☐
W9OEM-E-3SP-GND-10.85☐☐☐☐☐☐☐
W10SP-GND-1ELITE2500-A-100.85☐☐☐☐☐☐☐
W11SP-GND-1ELITE2500-A-110.85☐☐☐☐☐☐☐
W12OEM-A-10SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-A-11SP-0V-10.5☐☐☐☐☐☐☐
W14OEM-E-4SP-0V-10.5☐☐☐☐☐☐☐
W15SP-0V-1ELITE2500-B-140.5☐☐☐☐☐☐☐
W16SP-0V-1ELITE2500-B-150.5☐☐☐☐☐☐☐
W17SP-0V-1ELITE2500-B-160.5☐☐☐☐☐☐☐
W18OEM-A-20SP-5V1-10.5☐☐☐☐☐☐☐
W19OEM-A-21SP-5V1-10.5☐☐☐☐☐☐☐
W20OEM-E-5SP-5V1-10.5☐☐☐☐☐☐☐
W21SP-5V1-1ELITE2500-A-90.5☐☐☐☐☐☐☐
W22OEM-A-7ELITE2500-B-10.5☐☐☐☐☐☐☐
W23SP-0V-1ELITE2500-B-50.5☐☐☐☐☐☐☐
W24OEM-A-25ELITE2500-B-20.5☐☐☐☐☐☐☐
W25SP-0V-1ELITE2500-B-60.5☐☐☐☐☐☐☐
W26OEM-A-26ELITE2500-B-80.5☐☐☐☐☐☐☐
W27OEM-A-9ELITE2500-B-210.5☐☐☐☐☐☐☐
W28OEM-A-30ELITE2500-A-30.5☐☐☐☐☐☐☐
W29OEM-A-29ELITE2500-A-40.5☐☐☐☐☐☐☐
W30OEM-A-28ELITE2500-A-50.5☐☐☐☐☐☐☐
W31OEM-A-27ELITE2500-A-60.5☐☐☐☐☐☐☐
W32OEM-B-5ELITE2500-A-190.5☐☐☐☐☐☐☐
W33OEM-B-4ELITE2500-A-200.5☐☐☐☐☐☐☐
W34OEM-B-3ELITE2500-A-210.5☐☐☐☐☐☐☐
W35OEM-B-2ELITE2500-A-220.5☐☐☐☐☐☐☐
W36OEM-E-9ELITE2500-A-130.5☐☐☐☐☐☐☐
W37OEM-E-7ELITE2500-A-250.5☐☐☐☐☐☐☐
W38OEM-B-6ELITE2500-A-180.5☐☐☐☐☐☐☐
W39OEM-E-1ELITE2500-A-240.5☐☐☐☐☐☐☐
W40OEM-E-18ELITE2500-A-10.5☐☐☐☐☐☐☐
W41OEM-E-8ELITE2500-A-230.5☐☐☐☐☐☐☐
W42OEM-E-6ELITE2500-B-190.5☐☐☐☐☐☐☐
W43OEM-A-1ELITE2500-A-310.5☐☐☐☐☐☐☐
W44OEM-A-12ELITE2500-A-320.5☐☐☐☐☐☐☐
W45OEM-B-15ELITE2500-A-330.5☐☐☐☐☐☐☐
W46OEM-B-1ELITE2500-A-340.5☐☐☐☐☐☐☐
W47OEM-B-18ELITE2500-A-270.5☐☐☐☐☐☐☐
W48OEM-B-21ELITE2500-A-280.5☐☐☐☐☐☐☐
W49OEM-B-23ELITE2500-A-290.5☐☐☐☐☐☐☐
W50OEM-B-7ELITE2500-A-300.5☐☐☐☐☐☐☐
W51OEM-E-21ELITE2500-B-250.5☐☐☐☐☐☐☐
W52OEM-E-31ELITE2500-B-260.5☐☐☐☐☐☐☐
W53OEM-A-19ELITE2500-B-130.5☐☐☐☐☐☐☐
W54OEM-A-15ELITE2500-A-160.5☐☐☐☐☐☐☐
W55OEM-E-2ELITE2500-A-170.5☐☐☐☐☐☐☐
W56OEM-B-8ELITE2500-B-40.5☐☐☐☐☐☐☐
W57OEM-B-17ELITE2500-B-30.5☐☐☐☐☐☐☐
W58OEM-B-13ELITE2500-A-20.5☐☐☐☐☐☐☐
W59OEM-E-14ELITE2500-B-200.5☐☐☐☐☐☐☐
W60OEM-E-15ELITE2500-B-120.5☐☐☐☐☐☐☐
W61OEM-A-18ELITE2500-B-90.5☐☐☐☐☐☐☐
W62OEM-B-10ELITE2500-B-100.5☐☐☐☐☐☐☐
W63OEM-B-9ELITE2500-B-70.5☐☐☐☐☐☐☐
W64OEM-E-16ELITE2500-A-150.5☐☐☐☐☐☐☐
W65OEM-E-20ELITE2500-A-140.5☐☐☐☐☐☐☐

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
1ELITE2500-A-26ELITE2500-A-10open (OL)+12 V supply must not touch power ground
2ELITE2500-A-26ELITE2500-B-14open (OL)+12 V supply must not touch sensor ground
3ELITE2500-A-10ELITE2500-A-9open (OL)power ground must not touch 5 V sensor reference
4ELITE2500-A-26ELITE2500-A-9open (OL)+12 V supply must not touch 5 V sensor reference
5ELITE2500-B-14ELITE2500-A-9open (OL)sensor ground must not touch 5 V sensor reference

Revisions

RevLabelByDate
No revisions yet.

Schematic

ELITE2500-AELITE2500-BOEM-AOEM-BOEM-ESP-0VSP-14VSP-5V1SP-GND

Connectors

ELITE2500-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1DPO 2—W40—0.5OEM-E-18———
10Battery ground—W10—0.85SP-GND-1———
11Battery ground—W11—0.85SP-GND-1———
12+8V DC————————
1312V ignition input—W36—0.5OEM-E-9———
14AVI 10 (TPS)—W65—0.5OEM-E-20———
15AVI 9 (MAP)—W64—0.5OEM-E-16———
16AVI 2—W54—0.5OEM-A-15———
17AVI 3—W55—0.5OEM-E-2———
18DPO 1—W38—0.5OEM-B-6———
19INJ 1—W32—0.5OEM-B-5———
2AVI 4—W58—0.5OEM-B-13———
20INJ 2—W33—0.5OEM-B-4———
21INJ 3—W34—0.5OEM-B-3———
22INJ 4—W35—0.5OEM-B-2———
23DPO 3—W41—0.5OEM-E-8———
24DPO 5 (fuel pump trigger)—W39—0.5OEM-E-1———
25DPO 6 (ECR OUT)—W37—0.5OEM-E-7———
26ECU injector power input—W3—0.85SP-14V-1———
27INJ 5—W47—0.5OEM-B-18———
28INJ 6—W48—0.5OEM-B-21———
29INJ 7—W49—0.5OEM-B-23———
3IGN 1—W28—0.5OEM-A-30———
30INJ 8—W50—0.5OEM-B-7———
31Stepper 1 P1 / DPO—W43—0.5OEM-A-1———
32Stepper 1 P2 / DPO—W44—0.5OEM-A-12———
33Stepper 1 P3 / DPO—W45—0.5OEM-B-15———
34Stepper 1 P4 / DPO—W46—0.5OEM-B-1———
4IGN 2—W29—0.5OEM-A-29———
5IGN 3—W30—0.5OEM-A-28———
6IGN 4—W31—0.5OEM-A-27———
7IGN 5————————
8IGN 6————————
9+5V DC—W21—0.5SP-5V1-1———

ELITE2500-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Crank (Trigger) (+)—W22—0.5OEM-A-7———
10SPI 3—W62—0.5OEM-B-10———
11+13.8V ECU supply—W4—0.85SP-14V-1———
12AVI 6 (O2 Input 1)—W60—0.5OEM-E-15———
13AVI 1 (O2 Input 2)—W53—0.5OEM-A-19———
14Signal ground—W15—0.5SP-0V-1———
15Signal ground—W16—0.5SP-0V-1———
16Signal ground—W17—0.5SP-0V-1———
17IGN 7————————
18IGN 8————————
19DPO 4—W42—0.5OEM-E-6———
2Cam (Home) (+)—W24—0.5OEM-A-25———
20AVI 5—W59—0.5OEM-E-14———
21KNOCK 1—W27—0.5OEM-A-9———
22KNOCK 2————————
23CAN H————————
24CAN L————————
25DBW 1 / DPO—W51—0.5OEM-E-21———
26DBW 2 / DPO—W52—0.5OEM-E-31———
3AVI 7 (Air Temp)—W57—0.5OEM-B-17———
4AVI 8 (Coolant Temp)—W56—0.5OEM-B-8———
5Crank (Trigger) (−)—W23—0.5SP-0V-1———
6Cam (Home) (−)—W25—0.5SP-0V-1———
7SPI 4—W63—0.5OEM-B-9———
8SPI 1—W26—0.5OEM-A-26———
9SPI 2—W61—0.5OEM-A-18———

OEM-A

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1A/F sensor heater control (AFSHTC)—W43—0.5ELITE2500-A-31———
2Ignition power 2 (IGP2)—W1—0.85SP-14V-1———
3Ignition power 1 (IGP1)—W2—0.85SP-14V-1———
4Power ground 2 (PG2)—W7—0.85SP-GND-1———
5Power ground 1 (PG1)—W8—0.85SP-GND-1———
6A/F sensor + (AFS+, wideband Ip)————————
7Crank position sensor (CKP)—W22—0.5ELITE2500-B-1———
8—————————
9Knock sensor (KS)—W27—0.5ELITE2500-B-21———
10Sensor ground 2 (SG2)—W12—0.5SP-0V-1———
11Sensor ground 1 (SG1)—W13—0.5SP-0V-1———
12Idle air control valve (IACV)—W44—0.5ELITE2500-A-32———
13—————————
14—————————
15Throttle position sensor (TPS)—W54—0.5ELITE2500-A-16———
16A/F sensor - (AFS-, wideband Vs)————————
17—————————
18Vehicle speed sensor (VSS, M/T)—W61—0.5ELITE2500-B-9———
19Manifold absolute pressure (MAP)—W53—0.5ELITE2500-B-13———
20Sensor 5V supply 2 (VCC2)—W18—0.5SP-5V1-1———
21Sensor 5V supply 1 (VCC1)—W19—0.5SP-5V1-1———
22A/F sensor heater supply (AFSHTC+)————————
23Logic ground 2 (LG2)—W5—0.85SP-GND-1———
24Logic ground 1 (LG1)—W6—0.85SP-GND-1———
25Camshaft position A (CMP A)—W24—0.5ELITE2500-B-2———
26Camshaft position B (CMP B)—W26—0.5ELITE2500-B-8———
27Ignition coil 4 (IGPLS4)—W31—0.5ELITE2500-A-6———
28Ignition coil 3 (IGPLS3)—W30—0.5ELITE2500-A-5———
29Ignition coil 2 (IGPLS2)—W29—0.5ELITE2500-A-4———
30Ignition coil 1 (IGPLS1)—W28—0.5ELITE2500-A-3———
31—————————

OEM-B

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1VTC oil control solenoid (+)—W46—0.5ELITE2500-A-34———
2Injector 4 (INJ4)—W35—0.5ELITE2500-A-22———
3Injector 3 (INJ3)—W34—0.5ELITE2500-A-21———
4Injector 2 (INJ2)—W33—0.5ELITE2500-A-20———
5Injector 1 (INJ1)—W32—0.5ELITE2500-A-19———
6Radiator fan control (FANC)—W38—0.5ELITE2500-A-18———
7Reverse lockout solenoid (RVS, Type-S)—W50—0.5ELITE2500-A-30———
8Coolant temp sensor (ECT)—W56—0.5ELITE2500-B-4———
9VTEC oil pressure switch (VTPSW)—W63—0.5ELITE2500-B-7———
10Alternator L signal (ALTL)—W62—0.5ELITE2500-B-10———
11—————————
12—————————
13Alternator FR signal (ALTF)—W58—0.5ELITE2500-A-2———
14—————————
15VTEC solenoid (VTS)—W45—0.5ELITE2500-A-33———
16—————————
17Intake air temp sensor (IAT)—W57—0.5ELITE2500-B-3———
18Alternator control (ALTC)—W47—0.5ELITE2500-A-27———
19—————————
20—————————
21Evap canister purge valve (PCS)—W48—0.5ELITE2500-A-28———
22—————————
23VTC oil control solenoid (-)—W49—0.5ELITE2500-A-29———
24—————————

OEM-E

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Immobilizer fuel pump relay (IMO FPR)—W39—0.5ELITE2500-A-24———
2Secondary heated O2 sensor (SHO2S)—W55—0.5ELITE2500-A-17———
3Logic ground 3 (LG3)—W9—0.85SP-GND-1———
4Sensor ground 3 (SG3)—W14—0.5SP-0V-1———
5Sensor 5V supply 3 (VCC3)—W20—0.5SP-5V1-1———
6Secondary O2 heater control (SO2SHTC)—W42—0.5ELITE2500-B-19———
7Main relay control (MRLY)—W37—0.5ELITE2500-A-25———
8A/F sensor heater relay control (AFSHTCR)—W41—0.5ELITE2500-A-23———
9Ignition switch signal (IG1)—W36—0.5ELITE2500-A-13———
10—————————
11—————————
12—————————
13—————————
14Fuel tank pressure sensor (FTP)—W59—0.5ELITE2500-B-20———
15Electrical load detector (ELD)—W60—0.5ELITE2500-B-12———
16Power steering pressure switch (PSPSW)—W64—0.5ELITE2500-A-15———
17—————————
18A/C clutch relay (ACC)—W40—0.5ELITE2500-A-1———
19—————————
20Brake switch / interlock (2WBS)—W65—0.5ELITE2500-A-14———
21Evap vent shut valve (VSV)—W51—0.5ELITE2500-B-25———
22Brake switch (BKSW)————————
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)—W52—0.5ELITE2500-B-26———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W25—0.5ELITE2500-B-6———
1——W12—0.5OEM-A-10———
1——W13—0.5OEM-A-11———
1——W14—0.5OEM-E-4———
1——W15—0.5ELITE2500-B-14———
1——W16—0.5ELITE2500-B-15———
1——W17—0.5ELITE2500-B-16———
1——W23—0.5ELITE2500-B-5———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-A-2———
1——W2—0.85OEM-A-3———
1——W3—0.85ELITE2500-A-26———
1——W4—0.85ELITE2500-B-11———

SP-5V1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W18—0.5OEM-A-20———
1——W19—0.5OEM-A-21———
1——W20—0.5OEM-E-5———
1——W21—0.5ELITE2500-A-9———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W5—0.85OEM-A-23———
1——W6—0.85OEM-A-24———
1——W7—0.85OEM-A-4———
1——W8—0.85OEM-A-5———
1——W9—0.85OEM-E-3———
1——W10—0.85ELITE2500-A-10———
1——W11—0.85ELITE2500-A-11———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1A/F sensor heater control (AFSHTC)low_side_outELITE2500-A-31Stepper 1 P1 / DPOswitch_outsingle_source
OEM-A-10Sensor ground 2 (SG2)sensor_groundELITE2500-B-14 + ELITE2500-B-15 + ELITE2500-B-16 + ELITE2500-B-5 + ELITE2500-B-6Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−)sensor_ground + trigger_incorroborated
OEM-A-11Sensor ground 1 (SG1)sensor_groundELITE2500-B-14 + ELITE2500-B-15 + ELITE2500-B-16 + ELITE2500-B-5 + ELITE2500-B-6Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−)sensor_ground + trigger_incorroborated
OEM-A-12Idle air control valve (IACV)low_side_outELITE2500-A-32Stepper 1 P2 / DPOswitch_outcorroborated
OEM-A-15Throttle position sensor (TPS)analog_inELITE2500-A-16AVI 2analog_incorroborated
OEM-A-16A/F sensor - (AFS-, wideband Vs)wb_vs———single_source
OEM-A-18Vehicle speed sensor (VSS, M/T)digital_inELITE2500-B-9SPI 2digital_incorroborated
OEM-A-19Manifold absolute pressure (MAP)analog_inELITE2500-B-13AVI 1 (O2 Input 2)analog_incorroborated
OEM-A-2Ignition power 2 (IGP2)power_inELITE2500-A-26 + ELITE2500-B-11ECU injector power input + +13.8V ECU supplypower_incorroborated
OEM-A-20Sensor 5V supply 2 (VCC2)vrefELITE2500-A-9+5V DCvrefcorroborated
OEM-A-21Sensor 5V supply 1 (VCC1)vrefELITE2500-A-9+5V DCvrefcorroborated
OEM-A-22A/F sensor heater supply (AFSHTC+)power_out———single_source
OEM-A-23Logic ground 2 (LG2)groundELITE2500-A-10 + ELITE2500-A-11Battery ground + Battery groundgroundcorroborated
OEM-A-24Logic ground 1 (LG1)groundELITE2500-A-10 + ELITE2500-A-11Battery ground + Battery groundgroundcorroborated
OEM-A-25Camshaft position A (CMP A)trigger_inELITE2500-B-2Cam (Home) (+)trigger_insingle_source
OEM-A-26Camshaft position B (CMP B)trigger_inELITE2500-B-8SPI 1digital_insingle_source
OEM-A-27Ignition coil 4 (IGPLS4)ignition_outELITE2500-A-6IGN 4ignition_outcorroborated
OEM-A-28Ignition coil 3 (IGPLS3)ignition_outELITE2500-A-5IGN 3ignition_outcorroborated
OEM-A-29Ignition coil 2 (IGPLS2)ignition_outELITE2500-A-4IGN 2ignition_outcorroborated
OEM-A-3Ignition power 1 (IGP1)power_inELITE2500-A-26 + ELITE2500-B-11ECU injector power input + +13.8V ECU supplypower_incorroborated
OEM-A-30Ignition coil 1 (IGPLS1)ignition_outELITE2500-A-3IGN 1ignition_outcorroborated
OEM-A-4Power ground 2 (PG2)groundELITE2500-A-10 + ELITE2500-A-11Battery ground + Battery groundgroundcorroborated
OEM-A-5Power ground 1 (PG1)groundELITE2500-A-10 + ELITE2500-A-11Battery ground + Battery groundgroundcorroborated
OEM-A-6A/F sensor + (AFS+, wideband Ip)wb_ip———single_source
OEM-A-7Crank position sensor (CKP)trigger_inELITE2500-B-1Crank (Trigger) (+)trigger_incorroborated
OEM-A-9Knock sensor (KS)knock_inELITE2500-B-21KNOCK 1knock_incorroborated
OEM-B-1VTC oil control solenoid (+)low_side_outELITE2500-A-34Stepper 1 P4 / DPOswitch_outcorroborated
OEM-B-10Alternator L signal (ALTL)digital_inELITE2500-B-10SPI 3digital_insingle_source
OEM-B-13Alternator FR signal (ALTF)analog_inELITE2500-A-2AVI 4analog_insingle_source
OEM-B-15VTEC solenoid (VTS)low_side_outELITE2500-A-33Stepper 1 P3 / DPOswitch_outsingle_source
OEM-B-17Intake air temp sensor (IAT)temp_inELITE2500-B-3AVI 7 (Air Temp)analog_incorroborated
OEM-B-18Alternator control (ALTC)low_side_outELITE2500-A-27INJ 5injector_outcorroborated
OEM-B-2Injector 4 (INJ4)injector_outELITE2500-A-22INJ 4injector_outcorroborated
OEM-B-21Evap canister purge valve (PCS)low_side_outELITE2500-A-28INJ 6injector_outcorroborated
OEM-B-23VTC oil control solenoid (-)low_side_outELITE2500-A-29INJ 7injector_outcorroborated
OEM-B-3Injector 3 (INJ3)injector_outELITE2500-A-21INJ 3injector_outcorroborated
OEM-B-4Injector 2 (INJ2)injector_outELITE2500-A-20INJ 2injector_outcorroborated
OEM-B-5Injector 1 (INJ1)injector_outELITE2500-A-19INJ 1injector_outcorroborated
OEM-B-6Radiator fan control (FANC)low_side_outELITE2500-A-18DPO 1low_side_outcorroborated
OEM-B-7Reverse lockout solenoid (RVS, Type-S)low_side_outELITE2500-A-30INJ 8injector_outcorroborated
OEM-B-8Coolant temp sensor (ECT)temp_inELITE2500-B-4AVI 8 (Coolant Temp)analog_incorroborated
OEM-B-9VTEC oil pressure switch (VTPSW)digital_inELITE2500-B-7SPI 4digital_incorroborated
OEM-E-1Immobilizer fuel pump relay (IMO FPR)low_side_outELITE2500-A-24DPO 5 (fuel pump trigger)low_side_outcorroborated
OEM-E-14Fuel tank pressure sensor (FTP)analog_inELITE2500-B-20AVI 5analog_incorroborated
OEM-E-15Electrical load detector (ELD)analog_inELITE2500-B-12AVI 6 (O2 Input 1)analog_incorroborated
OEM-E-16Power steering pressure switch (PSPSW)digital_inELITE2500-A-15AVI 9 (MAP)analog_incorroborated
OEM-E-18A/C clutch relay (ACC)low_side_outELITE2500-A-1DPO 2low_side_outcorroborated
OEM-E-2Secondary heated O2 sensor (SHO2S)lambda_nb_inELITE2500-A-17AVI 3analog_incorroborated
OEM-E-20Brake switch / interlock (2WBS)digital_inELITE2500-A-14AVI 10 (TPS)analog_insingle_source
OEM-E-21Evap vent shut valve (VSV)low_side_outELITE2500-B-25DBW 1 / DPOhbridge_outcorroborated
OEM-E-22Brake switch (BKSW)digital_in———corroborated
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)groundELITE2500-A-10 + ELITE2500-A-11Battery ground + Battery groundgroundcorroborated
OEM-E-30Write enable signal (WEN)————single_source
OEM-E-31Malfunction indicator lamp (MIL)low_side_outELITE2500-B-26DBW 2 / DPOhbridge_outcorroborated
OEM-E-4Sensor ground 3 (SG3)sensor_groundELITE2500-B-14 + ELITE2500-B-15 + ELITE2500-B-16 + ELITE2500-B-5 + ELITE2500-B-6Signal ground + Signal ground + Signal ground + Crank (Trigger) (−) + Cam (Home) (−)sensor_ground + trigger_incorroborated
OEM-E-5Sensor 5V supply 3 (VCC3)vrefELITE2500-A-9+5V DCvrefcorroborated
OEM-E-6Secondary O2 heater control (SO2SHTC)low_side_outELITE2500-B-19DPO 4low_side_outcorroborated
OEM-E-7Main relay control (MRLY)low_side_outELITE2500-A-25DPO 6 (ECR OUT)low_side_outcorroborated
OEM-E-8A/F sensor heater relay control (AFSHTCR)low_side_outELITE2500-A-23DPO 3low_side_outcorroborated
OEM-E-9Ignition switch signal (IG1)digital_inELITE2500-A-1312V ignition inputdigital_incorroborated

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-1ELITE2500-A-260.85no routeECU injector power input—
W4SP-14V-1ELITE2500-B-110.85no route+13.8V ECU supply—
W5OEM-A-23SP-GND-10.85no routeLogic ground 2 (LG2)—
W6OEM-A-24SP-GND-10.85no routeLogic ground 1 (LG1)—
W7OEM-A-4SP-GND-10.85no routePower ground 2 (PG2)—
W8OEM-A-5SP-GND-10.85no routePower ground 1 (PG1)—
W9OEM-E-3SP-GND-10.85no routeLogic ground 3 (LG3)—
W10SP-GND-1ELITE2500-A-100.85no routeBattery ground—
W11SP-GND-1ELITE2500-A-110.85no routeBattery ground—
W12OEM-A-10SP-0V-10.5no routeSensor ground 2 (SG2)—
W13OEM-A-11SP-0V-10.5no routeSensor ground 1 (SG1)—
W14OEM-E-4SP-0V-10.5no routeSensor ground 3 (SG3)—
W15SP-0V-1ELITE2500-B-140.5no routeSignal ground—
W16SP-0V-1ELITE2500-B-150.5no routeSignal ground—
W17SP-0V-1ELITE2500-B-160.5no routeSignal ground—
W18OEM-A-20SP-5V1-10.5no routeSensor 5V supply 2 (VCC2)—
W19OEM-A-21SP-5V1-10.5no routeSensor 5V supply 1 (VCC1)—
W20OEM-E-5SP-5V1-10.5no routeSensor 5V supply 3 (VCC3)—
W21SP-5V1-1ELITE2500-A-90.5no route+5V DC—
W22OEM-A-7ELITE2500-B-10.5no routeCrank position sensor (CKP)—
W23SP-0V-1ELITE2500-B-50.5no routeCrank (Trigger) (−)—
W24OEM-A-25ELITE2500-B-20.5no routeCamshaft position A (CMP A)—
W25SP-0V-1ELITE2500-B-60.5no routeCam (Home) (−)—
W26OEM-A-26ELITE2500-B-80.5no routeCamshaft position B (CMP B)—
W27OEM-A-9ELITE2500-B-210.5no routeKnock sensor (KS)—
W28OEM-A-30ELITE2500-A-30.5no routeIgnition coil 1 (IGPLS1)—
W29OEM-A-29ELITE2500-A-40.5no routeIgnition coil 2 (IGPLS2)—
W30OEM-A-28ELITE2500-A-50.5no routeIgnition coil 3 (IGPLS3)—
W31OEM-A-27ELITE2500-A-60.5no routeIgnition coil 4 (IGPLS4)—
W32OEM-B-5ELITE2500-A-190.5no routeInjector 1 (INJ1)—
W33OEM-B-4ELITE2500-A-200.5no routeInjector 2 (INJ2)—
W34OEM-B-3ELITE2500-A-210.5no routeInjector 3 (INJ3)—
W35OEM-B-2ELITE2500-A-220.5no routeInjector 4 (INJ4)—
W36OEM-E-9ELITE2500-A-130.5no routeIgnition switch signal (IG1)—
W37OEM-E-7ELITE2500-A-250.5no routeMain relay control (MRLY)—
W38OEM-B-6ELITE2500-A-180.5no routeRadiator fan control (FANC)—
W39OEM-E-1ELITE2500-A-240.5no routeImmobilizer fuel pump relay (IMO FPR)—
W40OEM-E-18ELITE2500-A-10.5no routeA/C clutch relay (ACC)—
W41OEM-E-8ELITE2500-A-230.5no routeA/F sensor heater relay control (AFSHTCR)—
W42OEM-E-6ELITE2500-B-190.5no routeSecondary O2 heater control (SO2SHTC)—
W43OEM-A-1ELITE2500-A-310.5no routeA/F sensor heater control (AFSHTC)—
W44OEM-A-12ELITE2500-A-320.5no routeIdle air control valve (IACV)—
W45OEM-B-15ELITE2500-A-330.5no routeVTEC solenoid (VTS)—
W46OEM-B-1ELITE2500-A-340.5no routeVTC oil control solenoid (+)—
W47OEM-B-18ELITE2500-A-270.5no routeAlternator control (ALTC)—
W48OEM-B-21ELITE2500-A-280.5no routeEvap canister purge valve (PCS)—
W49OEM-B-23ELITE2500-A-290.5no routeVTC oil control solenoid (-)—
W50OEM-B-7ELITE2500-A-300.5no routeReverse lockout solenoid (RVS, Type-S)—
W51OEM-E-21ELITE2500-B-250.5no routeEvap vent shut valve (VSV)—
W52OEM-E-31ELITE2500-B-260.5no routeMalfunction indicator lamp (MIL)—
W53OEM-A-19ELITE2500-B-130.5no routeManifold absolute pressure (MAP)—
W54OEM-A-15ELITE2500-A-160.5no routeThrottle position sensor (TPS)—
W55OEM-E-2ELITE2500-A-170.5no routeSecondary heated O2 sensor (SHO2S)—
W56OEM-B-8ELITE2500-B-40.5no routeCoolant temp sensor (ECT)—
W57OEM-B-17ELITE2500-B-30.5no routeIntake air temp sensor (IAT)—
W58OEM-B-13ELITE2500-A-20.5no routeAlternator FR signal (ALTF)—
W59OEM-E-14ELITE2500-B-200.5no routeFuel tank pressure sensor (FTP)—
W60OEM-E-15ELITE2500-B-120.5no routeElectrical load detector (ELD)—
W61OEM-A-18ELITE2500-B-90.5no routeVehicle speed sensor (VSS, M/T)—
W62OEM-B-10ELITE2500-B-100.5no routeAlternator L signal (ALTL)—
W63OEM-B-9ELITE2500-B-70.5no routeVTEC oil pressure switch (VTPSW)—
W64OEM-E-16ELITE2500-A-150.5no routePower steering pressure switch (PSPSW)—
W65OEM-E-20ELITE2500-A-140.5no routeBrake switch / interlock (2WBS)—

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)55.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (21)

SeverityCodeSubjectMessage
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.
warnNET_FAMILYOEM-A-26 ↔ ELITE2500-B-8OEM-A-26 "Camshaft position B (CMP B)" [trigger_in] is wired to ELITE2500-B-8 "SPI 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot.
warnNET_FAMILYOEM-E-16 ↔ ELITE2500-A-15OEM-E-16 "Power steering pressure switch (PSPSW)" [digital_in] is wired to ELITE2500-A-15 "AVI 9 (MAP)" [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-E-20 ↔ ELITE2500-A-14OEM-E-20 "Brake switch / interlock (2WBS)" [digital_in] is wired to ELITE2500-A-14 "AVI 10 (TPS)" [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-E-21 ↔ ELITE2500-B-25OEM-E-21 "Evap vent shut valve (VSV)" [low_side_out] is wired to ELITE2500-B-25 "DBW 1 / DPO" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnNET_FAMILYOEM-E-31 ↔ ELITE2500-B-26OEM-E-31 "Malfunction indicator lamp (MIL)" [low_side_out] is wired to ELITE2500-B-26 "DBW 2 / DPO" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way.
warnSUPPLY_GROUPELITE2500-A-9 + OEM-A-20 + OEM-A-21 + OEM-E-5 + SP-5V1-1Supplies meant to stay independent share one net: OEM-A-20 [k_vcc2], 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-A-1 ↔ ELITE2500-A-31OEM-A-1 "A/F sensor heater control (AFSHTC)" [low_side_out] is wired to ELITE2500-A-31 "Stepper 1 P1 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-A-11 ↔ ELITE2500-B-6OEM-A-11 "Sensor ground 1 (SG1)" [sensor_ground] is wired to ELITE2500-B-6 "Cam (Home) (−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs.
infoNET_FAMILYOEM-A-12 ↔ ELITE2500-A-32OEM-A-12 "Idle air control valve (IACV)" [low_side_out] is wired to ELITE2500-A-32 "Stepper 1 P2 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-B-1 ↔ ELITE2500-A-34OEM-B-1 "VTC oil control solenoid (+)" [low_side_out] is wired to ELITE2500-A-34 "Stepper 1 P4 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-B-15 ↔ ELITE2500-A-33OEM-B-15 "VTEC solenoid (VTS)" [low_side_out] is wired to ELITE2500-A-33 "Stepper 1 P3 / DPO" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-B-17 ↔ ELITE2500-B-3OEM-B-17 "Intake air temp sensor (IAT)" [temp_in] is wired to ELITE2500-B-3 "AVI 7 (Air Temp)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-B-18 ↔ ELITE2500-A-27OEM-B-18 "Alternator control (ALTC)" [low_side_out] is wired to ELITE2500-A-27 "INJ 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-B-21 ↔ ELITE2500-A-28OEM-B-21 "Evap canister purge valve (PCS)" [low_side_out] is wired to ELITE2500-A-28 "INJ 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-B-23 ↔ ELITE2500-A-29OEM-B-23 "VTC oil control solenoid (-)" [low_side_out] is wired to ELITE2500-A-29 "INJ 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-B-7 ↔ ELITE2500-A-30OEM-B-7 "Reverse lockout solenoid (RVS, Type-S)" [low_side_out] is wired to ELITE2500-A-30 "INJ 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency.
infoNET_FAMILYOEM-B-8 ↔ ELITE2500-B-4OEM-B-8 "Coolant temp sensor (ECT)" [temp_in] is wired to ELITE2500-B-4 "AVI 8 (Coolant Temp)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoUNMAPPEDOEM10 optional OEM pins are not mapped: OEM-A-16 A/F sensor - (AFS-, wideband Vs); OEM-A-22 A/F sensor heater supply (AFSHTC+); OEM-A-6 A/F sensor + (AFS+, wideband Ip); OEM-E-22 Brake switch (BKSW); 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)

Accepted (0)

CodeSubjectReasonBy

Notes

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-E 26: Engine speed pulse / tacho (NEP): no free tacho/frequency_out/low_side/ls_hs on Haltech Elite 2500 - OEM-A 6: A/F sensor + (AFS+, wideband Ip): no free wb_ip on Haltech Elite 2500 - OEM-A 16: A/F sensor - (AFS-, wideband Vs): no free wb_vs on Haltech Elite 2500 - OEM-A 22: A/F sensor heater supply (AFSHTC+): no free heater_feed on Haltech Elite 2500 - OEM-E 22: Brake switch (BKSW): no free switch_in/frequency_in/analog_0_5 on Haltech Elite 2500 - OEM-E 23: K-line (diagnostic): no free k_line on Haltech Elite 2500 - OEM-E 24: Multiplex communication (SEFMJ): no free k_line on Haltech Elite 2500 - 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_docHaltech Elite 2500 (HT-151300) spec sheethttps://joeblospeedshop.com/wp-content/uploads/2023/11/HT-151300_SPEC-SHEET-2500-ELITE.pdfarchive2026-10-05c97da78cb851
4vendor_docHaltech Elite 2500 — 26-pin connector pinouthttps://support.haltech.com/portal/en/kb/articles/main-connector-26-pin-elite2500archive2026-10-05ea6fd4d27ac7
4vendor_docHaltech Elite 2500 — 34-pin main connector pinouthttps://support.haltech.com/portal/en/kb/articles/main-connector-34-pin-elite2500archive2026-10-054e633dff8340
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