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Which ECU for the Acura RSX Type-S 2002-04 (K20A2)?

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 53” counts the stock functions at least one ECU here wires.

Most complete

Haltech Nexus S3 HT-213000

Can carry 52 of 53 stock functions, with 4 spare outputs and 3 spare inputs left.

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

What each ECU wires and gives up

  • Haltech Nexus S3 HT-21300068 pins · proposal
    52/53
    Dash & gauges 14 out · 3 inDetails ▾

    Gives up (no free pin on this ECU)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU PRO REV10+155 pins · draft · 1 error
    51/53
    Engine 235 out · 22 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron KV16120 pins · draft · 1 error
    51/53
    Engine 1Dash & gauges 124 out · 19 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron KV12115 pins · draft · 1 error
    51/53
    Engine 1Dash & gauges 120 out · 19 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU GEN2 RACE136 pins · draft · 1 error
    51/53
    Engine 1Dash & gauges 120 out · 17 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron KV8106 pins · draft · 1 error
    51/53
    Engine 1Dash & gauges 112 out · 19 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU GEN2 TRACK93 pins · draft · 1 error
    51/53
    Engine 1Dash & gauges 18 out · 7 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • AMP EFI MS3Pro EVO+89 pins · proposal
    50/53
    Engine 39 out · 9 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • AMP EFI MS3Pro EVO+ HC89 pins · proposal
    50/53
    Engine 39 out · 9 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • AMP EFI MS3Pro Ultimate93 pins · proposal
    50/53
    Engine 39 out · 9 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • ECUMASTER EMU PRO 16120 pins · draft · 2 errors
    49/53
    Engine 3Dash & gauges 126 out · 22 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position A (CMP A)
    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • rusEFI Proteus93 pins · proposal
    49/53
    Engine 3Dash & gauges 114 out · 7 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MoTeC M190 13190136 pins · proposal
    48/53
    Engine 4Dash & gauges 128 out · 26 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MoTeC M150 13150120 pins · proposal
    48/53
    Engine 4Dash & gauges 116 out · 26 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron Shadow 868 pins · draft · 2 errors
    48/53
    Engine 4Dash & gauges 14 out · 8 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Link G4X FuryX 122-400068 pins · proposal
    48/53
    Engine 2Dash & gauges 2Emissions 13 out · 7 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU RACE REV9+80 pins · draft · 1 error
    48/53
    Engine 3Idle & accessories 1Dash & gauges 17 out · 3 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Haltech Elite 2500 HT-15130060 pins · proposal
    48/53
    Engine 3Idle & accessories 1Dash & gauges 14 out · 1 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • ECUMASTER EMU Black63 pins · proposal
    48/53
    Engine 2Dash & gauges 2Emissions 12 out · 1 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Reverse lockout solenoid (RVS, Type-S)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron SL866 pins · draft · 1 error
    47/53
    Engine 4Dash & gauges 24 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Link G4X XtremeX 109-400067 pins · draft
    46/53
    Engine 4Dash & gauges 2Emissions 14 out · 9 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron SL662 pins · draft · 1 error
    45/53
    Engine 5Dash & gauges 2Emissions 12 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)
    • Reverse lockout solenoid (RVS, Type-S)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Link G4X StormX 108-400060 pins · draft
    44/53
    Engine 6Dash & gauges 2Emissions 14 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MoTeC M170 1317066 pins · proposal
    44/53
    Engine 6Dash & gauges 2Emissions 14 out · 4 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MoTeC M130 1313060 pins · proposal
    44/53
    Engine 6Dash & gauges 2Emissions 14 out · 3 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MoTeC M800 universal60 pins · draft · 1 error
    44/53
    Engine 6Dash & gauges 2Emissions 12 out · 4 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Haltech Elite 1500 HT-15090051 pins · proposal
    44/53
    Engine 5Idle & accessories 1Dash & gauges 2Emissions 10 out · 0 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron SL458 pins · draft · 1 error
    43/53
    Engine 6Dash & gauges 2Emissions 20 out · 5 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap canister purge valve (PCS)
    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU SPORT REV9+48 pins · draft · 1 error
    40/53
    Engine 6Idle & accessories 3Dash & gauges 2Emissions 22 out · 2 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (-)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)
    • Brake switch / interlock (2WBS)
    • Power steering pressure switch (PSPSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap canister purge valve (PCS)
    • Evap vent shut valve (VSV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • AMP EFI MS3Pro Mini35 pins · proposal
    33/53
    Engine 10Charging 1Idle & accessories 4Dash & gauges 2Emissions 30 out · 1 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater control (AFSHTC)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (+)
    • VTC oil control solenoid (-)
    • VTEC solenoid (VTS)

    Charging

    ECU control of the alternator. Without it the alternator charges at its own fixed setting; confirm in the service manual.

    • Alternator control (ALTC)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)
    • Brake switch / interlock (2WBS)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap canister purge valve (PCS)
    • Evap vent shut valve (VSV)
    • Secondary O2 heater control (SO2SHTC)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU STREET REV9+40 pins · draft · 1 error
    32/53
    Engine 10Charging 2Idle & accessories 4Dash & gauges 2Emissions 32 out · 2 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor heater control (AFSHTC)
    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (+)
    • VTC oil control solenoid (-)
    • VTEC oil pressure switch (VTPSW)
    • VTEC solenoid (VTS)

    Charging

    ECU control of the alternator. Without it the alternator charges at its own fixed setting; confirm in the service manual.

    • Alternator FR signal (ALTF)
    • Alternator control (ALTC)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)
    • Brake switch / interlock (2WBS)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap canister purge valve (PCS)
    • Evap vent shut valve (VSV)
    • Fuel tank pressure sensor (FTP)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Link G4X MonsoonX34 pins · proposal
    32/53
    Engine 10Charging 1Idle & accessories 4Dash & gauges 2Emissions 40 out · 0 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater control (AFSHTC)
    • A/F sensor heater supply (AFSHTC+)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (+)
    • VTC oil control solenoid (-)
    • VTEC oil pressure switch (VTPSW)
    • VTEC solenoid (VTS)

    Charging

    ECU control of the alternator. Without it the alternator charges at its own fixed setting; confirm in the service manual.

    • Alternator control (ALTC)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)
    • Brake switch / interlock (2WBS)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap canister purge valve (PCS)
    • Evap vent shut valve (VSV)
    • Fuel tank pressure sensor (FTP)
    • Idle air control valve (IACV)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU MINI REV10+30 pins · draft · 2 errors
    26/53
    Engine 14Charging 2Idle & accessories 4Dash & gauges 2Emissions 50 out · 0 inDetails ▾

    Gives up (no free pin on this ECU)

    Engine

    Engine sensors and actuators (fuel, spark, triggers, cam/valve control). Check whether the new ECU needs each one: a second cam sensor, for example, is often optional, a VTEC or VVT solenoid is not.

    • A/F sensor + (AFS+, wideband Ip)
    • A/F sensor - (AFS-, wideband Vs)
    • A/F sensor heater control (AFSHTC)
    • A/F sensor heater relay control (AFSHTCR)
    • A/F sensor heater supply (AFSHTC+)
    • Camshaft position A (CMP A)
    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • VTC oil control solenoid (+)
    • VTC oil control solenoid (-)
    • VTEC oil pressure switch (VTPSW)
    • VTEC solenoid (VTS)

    Charging

    ECU control of the alternator. Without it the alternator charges at its own fixed setting; confirm in the service manual.

    • Alternator FR signal (ALTF)
    • Alternator control (ALTC)

    Idle & accessories

    Electrical load, A/C, fans, switches. Tune idle around them, or wire them to spare I/O later.

    • Brake switch (BKSW)
    • Brake switch / interlock (2WBS)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)

    Dash & gauges

    Gauge and warning-light drives. The cluster may lose a gauge or a light.

    • Engine speed pulse / tacho (NEP)
    • Malfunction indicator lamp (MIL)

    Emissions

    Emissions hardware. Usually deleted on race and off-road builds; may set a check-engine light or fail an inspection.

    • Evap canister purge valve (PCS)
    • Evap vent shut valve (VSV)
    • Fuel tank pressure sensor (FTP)
    • Idle air control valve (IACV)
    • Secondary O2 heater control (SO2SHTC)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

ECUs without a harness for this car

  • Link CIVICLink K20XPlug-inPlug-in: mates the stock plugs pin-for-pin, no adapter harness
  • Haltech Elite 1500 HT-140960 (02-04 RSX PnP)Plug-inPlug-in: mates the stock plugs pin-for-pin, no adapter harness
  • ECUMASTER EMU Black PnP K20A2Plug-inPlug-in: mates the stock plugs pin-for-pin, no adapter harness
  • rusEFI Hellen 125 Honda KPlug-inPlug-in: mates the stock plugs pin-for-pin, no adapter harness
  • Hondata KPro4Plug-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 E36XNot suitablePlug-in for BMW 3 Series E36 1990–2000 (M50/M52) 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
  • 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
  • Hondata FlashProNot suitablePlug-in for AP2 2006–09 (F22C1, DBW) only; this car's stock plugs differ
  • Link G4X AtomXNot suitableOnly on/off cam control; this engine needs variable cam timing
  • Link G4X S2000XNot suitablePlug-in for AP1 2000–03 (F20C), AP2 2004–05 (F22C1, cable) only; this car's stock plugs differ
  • AMP EFI MicrosquirtNot suitableNo cam control; this engine needs variable cam timing
  • 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
  • Link RX7XNot suitablePlug-in for Mazda RX-7 FD 1992-2002 (13B-REW twin-turbo) only; this car's stock plugs differ
  • SpeeduinoNot suitableTrigger decoder for this engine is still in development
  • 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 suitableNo cam control; this engine needs variable cam timing

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.