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Which ECU for the Honda S2000 AP2 2006–09 (F22C1, DBW)?

Every ECU below has a harness for this car. They all run the engine basics; the difference is how many of the stock ECU's other functions each one can still wire, and how much spare I/O is left for add-ons such as boost control or a wideband. “Of 49” counts the stock functions at least one ECU here wires.

Most complete

Emtron KV16

Can carry 49 of 49 stock functions, with 26 spare outputs and 14 spare inputs left.

Smallest that keeps every engine function

Emtron KV8

106 ECU pins, and still gives up nothing.

“Smallest” is by pin count, not price. Picks come from harnesses with no validation errors.

What each ECU wires and gives up

  • Emtron KV16120 pins · proposal
    49/49
    Gives up nothing26 out · 14 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron KV12115 pins · proposal
    49/49
    Gives up nothing22 out · 14 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron KV8106 pins · proposal
    49/49
    Gives up nothing14 out · 14 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron Shadow 868 pins · draft · 2 errors
    43/49
    Gives up nothingEngine 1 not wired yet (free pin available)+6 it could still wire on free pins7 out · 8 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    No bigger ECU needed: the harness can be extended onto spare I/O.

    Engine

    • Coolant temp sensor 2 — Second ECT sensor, used only by the OEM fan logic — left unwired in swaps: the aftermarket ECU runs the fan from ECT 1.

    Charging

    • Alternator FR signal

    Idle & accessories

    • Brake pedal switch
    • Electrical load detector
    • Engine mount control solenoid

    Emissions

    • Fuel tank pressure sensor

    Open harness → · Spare I/O

  • Emtron SL866 pins · draft · 2 errors
    43/49
    Gives up nothingEngine 1 not wired yet (free pin available)+6 it could still wire on free pins6 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    No bigger ECU needed: the harness can be extended onto spare I/O.

    Engine

    • Coolant temp sensor 2 — Second ECT sensor, used only by the OEM fan logic — left unwired in swaps: the aftermarket ECU runs the fan from ECT 1.

    Charging

    • Alternator FR signal

    Idle & accessories

    • Brake pedal switch
    • Electrical load detector
    • Engine mount control solenoid

    Emissions

    • Fuel tank pressure sensor

    Open harness → · Spare I/O

  • Emtron SL662 pins · draft · 2 errors
    42/49
    Gives up nothingEngine 1 not wired yet (free pin available)+7 it could still wire on free pins3 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    No bigger ECU needed: the harness can be extended onto spare I/O.

    Engine

    • Coolant temp sensor 2 — Second ECT sensor, used only by the OEM fan logic — left unwired in swaps: the aftermarket ECU runs the fan from ECT 1.

    Charging

    • Alternator FR signal

    Idle & accessories

    • Brake pedal switch
    • Electrical load detector
    • Engine mount control solenoid

    Emissions

    • Evap canister vent shut valve
    • Fuel tank pressure sensor

    Open harness → · Spare I/O

  • Emtron SL458 pins · draft · 2 errors
    40/49
    Gives up nothingEngine 1 not wired yet (free pin available)+9 it could still wire on free pins1 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Nothing that another ECU wires for this car.

    Not wired yet, but it has free pins for

    No bigger ECU needed: the harness can be extended onto spare I/O.

    Engine

    • Coolant temp sensor 2 — Second ECT sensor, used only by the OEM fan logic — left unwired in swaps: the aftermarket ECU runs the fan from ECT 1.

    Charging

    • Alternator FR signal
    • Alternator control

    Idle & accessories

    • Brake pedal switch
    • Electrical load detector
    • Engine mount control solenoid

    Emissions

    • Evap canister vent shut valve
    • Fuel tank pressure sensor
    • Secondary O2 heater

    Open harness → · Spare I/O

ECUs without a harness for this car

  • Link G4X FuryXUnconfirmedThrottle motor draws ≥ ~14 A; this ECU's H-bridge rating is not known
  • Link G4X XtremeXUnconfirmedThrottle motor draws ≥ ~14 A; this ECU's H-bridge rating is not known
  • rusEFI ProteusUnconfirmedThrottle motor draws ≥ ~14 A; this ECU's H-bridge rating is not known
  • Link G4X MonsoonXNeeds add-onDrive-by-wire only with an add-on: Link RET 115-1000
  • MoTeC M800Needs add-on · discontinuedDrive-by-wire only with an add-on: MoTeC DBW4 expander (obsolete)
  • AMP EFI MS3Pro MiniNeeds add-onDrive-by-wire only with an add-on: AMP Drive-By-Wire Controller
  • Hondata FlashProPlug-inPlug-in: mates the stock plugs pin-for-pin, no adapter harness
  • AEM EMS 30-1042Not suitable · discontinuedPlug-in for Honda NSX NA1 1991-2005 (C30A) only; this car's stock plugs differ
  • AMP EFI AMP PNP Miata NA6Not suitablePlug-in for MX-5 Miata NA6 1990-93 (B6-ZE, 1.6) only; this car's stock plugs differ
  • AMP EFI AMP PNP Miata NA8 94-95Not suitablePlug-in for MX-5 Miata NA8 1994-97 (BP-ZE, 1.8) only; this car's stock plugs differ
  • AMP EFI AMP PNP Miata NA8 96-97Not suitablePlug-in for MX-5 Miata NA8 1994-97 (BP-ZE, 1.8) only; this car's stock plugs differ
  • AMP EFI AMP PNP Miata NB1Not suitablePlug-in for MX-5 Miata NB1 1999-00 (BP-4W) only; this car's stock plugs differ
  • AMP EFI AMP PNP Miata NB2Not suitablePlug-in for MX-5 Miata NB2 2001-05 (BP-Z3, VVT) only; this car's stock plugs differ
  • MaxxECU C6 E38 Plug-inNot suitablePlug-in for Chevrolet Corvette C6 2005-13 (LS2/LS3/LS7) only; this car's stock plugs differ
  • Link CIVICLink K20XNot suitablePlug-in for RSX Type-S 2002-04 (K20A2) only; this car's stock plugs differ
  • Link E36XNot suitablePlug-in for BMW 3 Series E36 1990–2000 (M50/M52) only; this car's stock plugs differ
  • Haltech Elite 1500 HT-140960 (02-04 RSX PnP)Not suitablePlug-in for RSX Type-S 2002-04 (K20A2) only; this car's stock plugs differ
  • Haltech Elite 1500 HT-140961 (05-06 RSX PnP)Not suitablePlug-in for RSX Type-S 2005-06 (K20Z1) only; this car's stock plugs differ
  • Haltech Elite 1500 HT-150900Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 5.0 A
  • Haltech Elite 2500Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 5.0 A
  • ECUMASTER EMU BlackNot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 7.0 A
  • ECUMASTER EMU Black PnP ECU2JZBNot suitablePlug-in for Toyota Supra A80 1993-98 USDM (2JZ-GTE, non-VVT) only; this car's stock plugs differ
  • ECUMASTER EMU Black PnP K20A2Not suitablePlug-in for RSX Type-S 2002-04 (K20A2) only; this car's stock plugs differ
  • ECUMASTER EMU PRO 16Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 7.0 A
  • Link G4X AtomXNot suitableNo drive-by-wire; this car has an electronic throttle (the cable-conversion variant may work)
  • Link G4X S2000XNot suitablePlug-in for AP1 2000–03 (F20C), AP2 2004–05 (F22C1, cable) only; this car's stock plugs differ
  • Link G4X StormXNot suitableNo drive-by-wire; this car has an electronic throttle (the cable-conversion variant may work)
  • rusEFI Hellen 125 Honda KNot suitablePlug-in for RSX Type-S 2002-04 (K20A2) only; this car's stock plugs differ
  • Hondata KPro4Not suitablePlug-in for RSX Type-S 2002-04 (K20A2) only; this car's stock plugs differ
  • MoTeC M130Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 12.0 A
  • MoTeC M150Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 12.0 A
  • MoTeC M170Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 12.0 A
  • MoTeC M190Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 12.0 A
  • MaxxECU GEN2 RACENot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 5.0 A
  • MaxxECU GEN2 TRACKNot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 5.0 A
  • MaxxECU MININot suitableNo drive-by-wire; this car has an electronic throttle (the cable-conversion variant may work)
  • MaxxECU PRONot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 2.0 A
  • MaxxECU RACENot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 2.0 A
  • MaxxECU SPORTNot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 2.0 A
  • MaxxECU STREETNot suitableNo drive-by-wire; this car has an electronic throttle (the cable-conversion variant may work)
  • AMP EFI MicrosquirtNot suitableNo drive-by-wire; this car has an electronic throttle (the cable-conversion variant may work)
  • AMP EFI MS3Pro EVO+Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 0.75 A
  • AMP EFI MS3Pro EVO+ HCNot suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 0.75 A
  • AMP EFI MS3Pro UltimateNot suitable · discontinuedThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 0.75 A
  • MaxxECU Mustang 2011-14 plug-inNot suitablePlug-in for Mustang GT 2011–14 (Coyote 5.0) only; this car's stock plugs differ
  • Link MX5NAXNot suitablePlug-in for MX-5 Miata NA6 1990-93 (B6-ZE, 1.6), MX-5 Miata NA8 1994-97 (BP-ZE, 1.8) only; this car's stock plugs differ
  • Link MX5NB1XNot suitablePlug-in for MX-5 Miata NB1 1999-00 (BP-4W) only; this car's stock plugs differ
  • Link MX5NB2XNot suitablePlug-in for MX-5 Miata NB2 2001-05 (BP-Z3, VVT) only; this car's stock plugs differ
  • Haltech Nexus S3Not suitableThrottle motor draws ≥ ~14 A; this ECU's H-bridge is rated 8.0 A
  • Link RX7XNot suitablePlug-in for Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) only; this car's stock plugs differ
  • SpeeduinoNot suitableNo drive-by-wire; this car has an electronic throttle (the cable-conversion variant may work)
  • Link SupraLinkNot suitablePlug-in for Toyota Supra A80 1993-98 USDM (2JZ-GTE, non-VVT) only; this car's stock plugs differ
  • Holley Terminator X MAXNot suitableSold only as V8 engine kits (LS, Hemi, Ford) with fixed trigger patterns; no Subaru, Honda or Mazda support found

Categories are read from the stock pin names and are a guide; each item shows its full stock name. Power and ground pins aren't compared, since every harness powers and grounds the ECU. Prices aren't considered. Always check the harness's own findings before building.