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Which ECU for the Acura RSX Type-S 2005-06 (K20Z1)?

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

Most complete

Haltech Nexus S3 HT-213000

Can carry 49 of 51 stock functions, with 5 spare outputs and 4 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

  • MaxxECU PRO REV10+155 pins · draft · 1 error
    50/51
    Engine 135 out · 23 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)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Haltech Nexus S3 HT-21300068 pins · proposal
    49/51
    Idle & accessories 1Dash & gauges 15 out · 4 inDetails ▾

    Gives up (no free pin on this ECU)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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 PRO 16120 pins · draft · 2 errors
    48/51
    Engine 2Idle & accessories 126 out · 23 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 A (CMP A)
    • Camshaft position B (CMP B)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • Emtron KV16120 pins · draft · 1 error
    48/51
    Engine 1Idle & accessories 1Dash & gauges 125 out · 20 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    48/51
    Engine 1Idle & accessories 1Dash & gauges 121 out · 20 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    48/51
    Engine 1Idle & accessories 1Dash & gauges 121 out · 18 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    48/51
    Engine 1Idle & accessories 1Dash & gauges 113 out · 20 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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+ HC89 pins · proposal
    48/51
    Engine 2Idle & accessories 110 out · 10 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • AMP EFI MS3Pro EVO+89 pins · proposal
    48/51
    Engine 2Idle & accessories 110 out · 10 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • AMP EFI MS3Pro Ultimate93 pins · proposal
    48/51
    Engine 2Idle & accessories 110 out · 10 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    Not wired yet, but it has free pins for

    —

    Open harness → · Spare I/O

  • MaxxECU GEN2 TRACK93 pins · draft · 1 error
    48/51
    Engine 1Idle & accessories 1Dash & gauges 19 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.

    • Camshaft position B (CMP B)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    47/51
    Engine 2Idle & accessories 1Dash & gauges 115 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    47/51
    Engine 1Idle & accessories 1Dash & gauges 23 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.

    • Ignition switch signal (IG1)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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

  • MaxxECU RACE REV9+80 pins · draft · 1 error
    47/51
    Engine 2Idle & accessories 1Dash & gauges 18 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.

    • 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.

    • Vehicle speed output (VSSOUT)

    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
    47/51
    Engine 2Idle & accessories 1Dash & gauges 15 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)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    47/51
    Engine 1Idle & accessories 1Dash & gauges 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.

    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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

  • MoTeC M190 13190136 pins · proposal
    46/51
    Engine 3Idle & accessories 1Dash & gauges 129 out · 27 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)
    • Ignition switch signal (IG1)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    46/51
    Engine 3Idle & accessories 1Dash & gauges 117 out · 27 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)
    • Ignition switch signal (IG1)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    46/51
    Engine 3Idle & accessories 1Dash & gauges 15 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)
    • Camshaft position B (CMP B)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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 SL866 pins · draft · 1 error
    46/51
    Engine 3Idle & accessories 1Dash & gauges 14 out · 6 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)
    • Camshaft position B (CMP B)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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 XtremeX 109-400067 pins · draft
    45/51
    Engine 3Idle & accessories 1Dash & gauges 24 out · 10 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)
    • Ignition switch signal (IG1)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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

  • Emtron SL662 pins · draft · 1 error
    44/51
    Engine 4Idle & accessories 1Dash & gauges 22 out · 6 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)
    • Camshaft position B (CMP B)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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

  • Haltech Elite 1500 HT-15090051 pins · proposal
    44/51
    Engine 3Idle & 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)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    43/51
    Engine 4Idle & accessories 1Dash & gauges 2Emissions 14 out · 6 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)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    43/51
    Engine 4Idle & accessories 1Dash & 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)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    43/51
    Engine 4Idle & accessories 1Dash & 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)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    43/51
    Engine 4Idle & accessories 1Dash & 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.

    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    42/51
    Engine 4Idle & accessories 1Dash & gauges 2Emissions 20 out · 6 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)
    • Camshaft position B (CMP B)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Vehicle speed output (VSSOUT)

    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
    40/51
    Engine 4Idle & 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.

    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)

    Idle & accessories

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

    • Brake switch (BKSW)
    • Power steering pressure switch (PSPSW)
    • Vehicle speed output (VSSOUT)

    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
    33/51
    Engine 8Charging 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)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • 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)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)
    • Vehicle speed output (VSSOUT)

    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
    32/51
    Engine 8Charging 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)
    • Camshaft position B (CMP B)
    • Ignition switch signal (IG1)
    • Knock sensor (KS)
    • Reverse lockout solenoid (RVS, Type-S)
    • 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)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)
    • Vehicle speed output (VSSOUT)

    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
    32/51
    Engine 8Charging 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)
    • Ignition switch signal (IG1)
    • Reverse lockout solenoid (RVS, Type-S)
    • 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)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)
    • Vehicle speed output (VSSOUT)

    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
    26/51
    Engine 12Charging 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)
    • 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 (+)
    • 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)
    • Electrical load detector (ELD)
    • Power steering pressure switch (PSPSW)
    • Vehicle speed output (VSSOUT)

    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

  • Haltech Elite 1500 HT-140961 (05-06 RSX PnP)Plug-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
  • 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
  • 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
  • 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
  • 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.