S2000 2000–05 (AP1 / AP2 04–05) → Emtron SL4
AP1 2000–03 (F20C) — Emtron — SL4
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-04
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
S2K-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coolant temp gauge drive | — | W45 | — | 0.5 | SL4-A-17 | — | — | — |
| 2 | Air control valve solenoid | — | — | — | — | — | — | — | — |
| 3 | Evap bypass solenoid | — | — | — | — | — | — | — | — |
| 4 | Evap canister vent shut valve | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | Evap canister purge valve | — | W47 | — | 0.5 | SL4-A-19 | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Vehicle speed sensor | — | W24 | — | 0.5 | SL4-A-20 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | — | — | — | — | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W40 | — | 0.5 | SL4-A-12 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | — | — | — | — | — | — | — |
| 17 | A/C clutch relay | — | W42 | — | 0.5 | SL4-A-14 | — | — | — |
| 18 | Check engine light (MIL) | — | W44 | — | 0.5 | SL4-A-16 | — | — | — |
| 19 | Tacho output | — | W43 | — | 0.5 | SL4-A-15 | — | — | — |
| 20 | Radiator fan relay | — | W41 | — | 0.5 | SL4-A-13 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | — | — | — | — | — | — | — |
| 24 | Starter switch signal | — | W28 | — | 0.5 | SL4-A-24 | — | — | — |
| 25 | Immobilizer code | — | — | — | — | — | — | — | — |
| 26 | Power steering load detect | — | W29 | — | 0.5 | SL4-A-25 | — | — | — |
| 27 | A/C switch (request) | — | W27 | — | 0.5 | SL4-A-23 | — | — | — |
| 28 | Air pump relay | — | — | — | — | — | — | — | — |
| 29 | Fuel tank pressure sensor | — | — | — | — | — | — | — | — |
| 30 | Electrical load detector | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | Brake switch | — | W26 | — | 0.5 | SL4-A-22 | — | — | — |
S2K-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Power source 1 (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Power ground 1 | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Injector 2 | — | W31 | — | 0.5 | SL4-A-2 | — | — | — |
| 4 | Injector 3 | — | W32 | — | 0.5 | SL4-A-3 | — | — | — |
| 5 | Injector 4 | — | W33 | — | 0.5 | SL4-A-4 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Power source 2 (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Power ground 2 | — | — | — | — | — | — | — | — |
| 11 | Injector 1 | — | W30 | — | 0.5 | SL4-A-1 | — | — | — |
| 12 | VTEC solenoid | — | W38 | — | 0.5 | SL4-A-10 | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
| 17 | NC | — | — | — | — | — | — | — | — |
| 18 | NC | — | — | — | — | — | — | — | — |
| 19 | NC | — | — | — | — | — | — | — | — |
| 20 | Ground | — | — | — | — | — | — | — | — |
| 21 | Backup power (battery constant) | — | — | — | — | — | — | — | — |
| 22 | Ground | — | — | — | — | — | — | — | — |
| 23 | Idle air control valve | — | W39 | — | 0.5 | SL4-A-11 | — | — | — |
| 24 | NC | — | — | — | — | — | — | — | — |
| 25 | NC | — | — | — | — | — | — | — | — |
S2K-C
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Primary O2 heater | — | W46 | — | 0.5 | SL4-A-18 | — | — | — |
| 2 | Alternator control | — | — | — | — | — | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W34 | — | 0.5 | SL4-A-26 | — | — | — |
| 5 | Alternator FR signal | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W14 | — | 0.5 | SL4-B-5 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W15 | — | 0.5 | SL4-B-6 | — | — | — |
| 10 | VTEC pressure switch | — | W25 | — | 0.5 | SL4-A-21 | — | — | — |
| 11 | Secondary O2 heater control | — | — | — | — | — | — | — | — |
| 12 | Ignition coil 2 | — | W35 | — | 0.5 | SL4-A-27 | — | — | — |
| 13 | Ignition coil 3 | — | W36 | — | 0.5 | SL4-A-28 | — | — | — |
| 14 | Ignition coil 4 | — | W37 | — | 0.5 | SL4-A-29 | — | — | — |
| 15 | Secondary O2 sensor | — | W21 | — | 0.5 | SL4-B-14 | — | — | — |
| 16 | Primary O2 sensor | — | W20 | — | 0.5 | SL4-B-13 | — | — | — |
| 17 | MAP sensor | — | W18 | — | 0.5 | SL4-B-11 | — | — | — |
| 18 | Sensor ground 2 | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W11 | — | 0.5 | SP-5V-1 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W16 | — | 0.5 | SL4-B-7 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W17 | — | 0.5 | SL4-B-8 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | — | — | — | — | — | — | — |
| 25 | Intake air temp sensor | — | W23 | — | 0.5 | SL4-B-21 | — | — | — |
| 26 | Coolant temp sensor | — | W22 | — | 0.5 | SL4-B-20 | — | — | — |
| 27 | Throttle position sensor | — | W19 | — | 0.5 | SL4-B-12 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W12 | — | 0.5 | SP-5V-1 | — | — | — |
| 29 | Cam (TDC2) sensor + | — | — | — | — | — | — | — | — |
| 30 | Cam (TDC2) sensor − | — | — | — | — | — | — | — | — |
| 31 | Timing ground | — | — | — | — | — | — | — | — |
S2K-D
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | NC | — | — | — | — | — | — | — | — |
| 2 | NC | — | — | — | — | — | — | — | — |
| 3 | NC | — | — | — | — | — | — | — | — |
| 4 | NC | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | NC | — | — | — | — | — | — | — | — |
| 10 | NC | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | NC | — | — | — | — | — | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
SL4-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injection channel 1 | — | W30 | — | 0.5 | S2K-B-11 | — | — | — |
| 2 | Injection channel 2 | — | W31 | — | 0.5 | S2K-B-3 | — | — | — |
| 3 | Injection channel 3 | — | W32 | — | 0.5 | S2K-B-4 | — | — | — |
| 4 | Injection channel 4 | — | W33 | — | 0.5 | S2K-B-5 | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Sensor supply 8V | — | — | — | — | — | — | — | — |
| 10 | Auxiliary output 1 | — | W38 | — | 0.5 | S2K-B-12 | — | — | — |
| 11 | Auxiliary output 2 | — | W39 | — | 0.5 | S2K-B-23 | — | — | — |
| 12 | Auxiliary output 3 | — | W40 | — | 0.5 | S2K-A-15 | — | — | — |
| 13 | Auxiliary output 4 | — | W41 | — | 0.5 | S2K-A-20 | — | — | — |
| 14 | Auxiliary output 5 | — | W42 | — | 0.5 | S2K-A-17 | — | — | — |
| 15 | Auxiliary output 6 | — | W43 | — | 0.5 | S2K-A-19 | — | — | — |
| 16 | Auxiliary output 7 | — | W44 | — | 0.5 | S2K-A-18 | — | — | — |
| 17 | Auxiliary output 8 | — | W45 | — | 0.5 | S2K-A-1 | — | — | — |
| 18 | Auxiliary output 9 | — | W46 | — | 0.5 | S2K-C-1 | — | — | — |
| 19 | Auxiliary output 10 | — | W47 | — | 0.5 | S2K-A-6 | — | — | — |
| 20 | Digital input 1 | — | W24 | — | 0.5 | S2K-A-9 | — | — | — |
| 21 | Digital input 2 | — | W25 | — | 0.5 | S2K-C-10 | — | — | — |
| 22 | Digital input 3 | — | W26 | — | 0.5 | S2K-A-32 | — | — | — |
| 23 | Digital input 4 | — | W27 | — | 0.5 | S2K-A-27 | — | — | — |
| 24 | Digital input 5 | — | W28 | — | 0.5 | S2K-A-24 | — | — | — |
| 25 | Digital input 6 | — | W29 | — | 0.5 | S2K-A-26 | — | — | — |
| 26 | Ignition channel 1 | — | W34 | — | 0.5 | S2K-C-4 | — | — | — |
| 27 | Ignition channel 2 | — | W35 | — | 0.5 | S2K-C-12 | — | — | — |
| 28 | Ignition channel 3 | — | W36 | — | 0.5 | S2K-C-13 | — | — | — |
| 29 | Ignition channel 4 | — | W37 | — | 0.5 | S2K-C-14 | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | NC | — | — | — | — | — | — | — | — |
| 33 | NC | — | — | — | — | — | — | — | — |
| 34 | Aux 9–10 14V supply | — | — | — | — | — | — | — | — |
SL4-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU 14V supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Sensor supply Vref1 5.0V | — | W13 | — | 0.5 | SP-5V-1 | — | — | — |
| 3 | EFI relay output (low side, 200 mA) | — | — | — | — | — | — | — | — |
| 4 | Ignition switch input | — | W4 | — | 0.5 | SP-14V-1 | — | — | — |
| 5 | Crank index sensor + | — | W14 | — | 0.5 | S2K-C-8 | — | — | — |
| 6 | Crank index sensor − | — | W15 | — | 0.5 | S2K-C-9 | — | — | — |
| 7 | Sync sensor + | — | W16 | — | 0.5 | S2K-C-20 | — | — | — |
| 8 | Sync sensor − | — | W17 | — | 0.5 | S2K-C-21 | — | — | — |
| 9 | Shield (crank/sync/knock) | — | — | — | — | — | — | — | — |
| 10 | Analog sensor 0V reference | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | Analog input 1 | — | W18 | — | 0.5 | S2K-C-17 | — | — | — |
| 12 | Analog input 2 | — | W19 | — | 0.5 | S2K-C-27 | — | — | — |
| 13 | Analog input 3 | — | W20 | — | 0.5 | S2K-C-16 | — | — | — |
| 14 | Analog input 4 | — | W21 | — | 0.5 | S2K-C-15 | — | — | — |
| 15 | Analog input 5 | — | — | — | — | — | — | — | — |
| 16 | Knock 1 + | — | — | — | — | — | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | ECU ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 19 | Analog input 6 | — | — | — | — | — | — | — | — |
| 20 | Analog input 7 (switchable 1k pull-up) | — | W22 | — | 0.5 | S2K-C-26 | — | — | — |
| 21 | Analog input 8 (switchable 1k pull-up) | — | W23 | — | 0.5 | S2K-C-25 | — | — | — |
| 22 | Analog input 9 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 23 | Analog input 10 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 24 | Knock 2 + | — | — | — | — | — | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | ECU ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 27 | CAN 1 H | — | — | — | — | — | — | — | — |
| 28 | CAN 1 L | — | — | — | — | — | — | — | — |
| 29 | NC | — | — | — | — | — | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | Ethernet Tx + | — | — | — | — | — | — | — | — |
| 32 | Ethernet Tx − | — | — | — | — | — | — | — | — |
| 33 | Ethernet Rx + | — | — | — | — | — | — | — | — |
| 34 | Ethernet Rx − | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W8 | — | 0.5 | S2K-C-7 | — | — | — |
| 1 | — | — | W9 | — | 0.5 | S2K-C-18 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | SL4-B-10 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | S2K-B-1 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | S2K-B-9 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | SL4-B-1 | — | — | — |
| 1 | — | — | W4 | — | 0.5 | SL4-B-4 | — | — | — |
SP-5V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | S2K-C-19 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | S2K-C-28 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | SL4-B-2 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | S2K-B-2 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | SL4-B-18 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | SL4-B-26 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| S2K-A-1 | Coolant temp gauge drive | low_side_out | SL4-A-17 | Auxiliary output 8 | switch_out | corroborated | |
| S2K-A-10 | Service check signal | — | — | — | — | single_source | |
| S2K-A-11 | NC | — | — | — | — | unverified | |
| S2K-A-12 | Immobilizer indicator light | low_side_out | — | — | — | single_source | |
| S2K-A-13 | Immobilizer enable signal | — | — | — | — | single_source | |
| S2K-A-14 | NC | — | — | — | — | unverified | |
| S2K-A-15 | Fuel pump relay (USDM) | low_side_out | SL4-A-12 | Auxiliary output 3 | switch_out | corroborated | |
| S2K-A-16 | Fuel pump relay (JDM) | low_side_out | — | — | — | single_source | |
| S2K-A-17 | A/C clutch relay | low_side_out | SL4-A-14 | Auxiliary output 5 | switch_out | corroborated | |
| S2K-A-18 | Check engine light (MIL) | low_side_out | SL4-A-16 | Auxiliary output 7 | switch_out | corroborated | |
| S2K-A-19 | Tacho output | tacho_out | SL4-A-15 | Auxiliary output 6 | switch_out | corroborated | |
| S2K-A-2 | Air control valve solenoid | low_side_out | — | — | — | single_source | |
| S2K-A-20 | Radiator fan relay | low_side_out | SL4-A-13 | Auxiliary output 4 | switch_out | corroborated | |
| S2K-A-21 | K-Line | serial | — | — | — | single_source | |
| S2K-A-22 | NC | — | — | — | — | unverified | |
| S2K-A-23 | Secondary O2 sensor | lambda_nb_in | — | — | — | single_source | |
| S2K-A-24 | Starter switch signal | digital_in | SL4-A-24 | Digital input 5 | digital_in | corroborated | |
| S2K-A-25 | Immobilizer code | — | — | — | — | single_source | |
| S2K-A-26 | Power steering load detect | digital_in | SL4-A-25 | Digital input 6 | digital_in | corroborated | |
| S2K-A-27 | A/C switch (request) | digital_in | SL4-A-23 | Digital input 4 | digital_in | corroborated | |
| S2K-A-28 | Air pump relay | low_side_out | — | — | — | corroborated | |
| S2K-A-29 | Fuel tank pressure sensor | analog_in | — | — | — | corroborated | |
| S2K-A-3 | Evap bypass solenoid | low_side_out | — | — | — | single_source | |
| S2K-A-30 | Electrical load detector | analog_in | — | — | — | corroborated | |
| S2K-A-31 | NC | — | — | — | — | unverified | |
| S2K-A-32 | Brake switch | digital_in | SL4-A-22 | Digital input 3 | digital_in | corroborated | |
| S2K-A-4 | Evap canister vent shut valve | low_side_out | — | — | — | single_source | |
| S2K-A-5 | NC | — | — | — | — | unverified | |
| S2K-A-6 | Evap canister purge valve | low_side_out | SL4-A-19 | Auxiliary output 10 | hbridge_out | single_source | |
| S2K-A-7 | NC | — | — | — | — | unverified | |
| S2K-A-8 | NC | — | — | — | — | unverified | |
| S2K-A-9 | Vehicle speed sensor | digital_in | SL4-A-20 | Digital input 1 | digital_in | corroborated | |
| S2K-B-1 | Power source 1 (main relay) | power_in | SL4-B-1 + SL4-B-4 | ECU 14V supply + Ignition switch input | digital_in + power_in | corroborated | |
| S2K-B-10 | Power ground 2 | ground | — | — | — | single_source | |
| S2K-B-11 | Injector 1 | injector_out | SL4-A-1 | Injection channel 1 | injector_out | corroborated | |
| S2K-B-12 | VTEC solenoid | high_side_out | SL4-A-10 | Auxiliary output 1 | switch_out | corroborated | |
| S2K-B-13 | NC | — | — | — | — | unverified | |
| S2K-B-14 | NC | — | — | — | — | unverified | |
| S2K-B-15 | NC | — | — | — | — | unverified | |
| S2K-B-16 | NC | — | — | — | — | unverified | |
| S2K-B-17 | NC | — | — | — | — | unverified | |
| S2K-B-18 | NC | — | — | — | — | unverified | |
| S2K-B-19 | NC | — | — | — | — | unverified | |
| S2K-B-2 | Power ground 1 | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | corroborated | |
| S2K-B-20 | Ground | ground | — | — | — | single_source | |
| S2K-B-21 | Backup power (battery constant) | power_in | — | — | — | single_source | |
| S2K-B-22 | Ground | ground | — | — | — | single_source | |
| S2K-B-23 | Idle air control valve | low_side_out | SL4-A-11 | Auxiliary output 2 | switch_out | corroborated | |
| S2K-B-24 | NC | — | — | — | — | unverified | |
| S2K-B-25 | NC | — | — | — | — | unverified | |
| S2K-B-3 | Injector 2 | injector_out | SL4-A-2 | Injection channel 2 | injector_out | corroborated | |
| S2K-B-4 | Injector 3 | injector_out | SL4-A-3 | Injection channel 3 | injector_out | corroborated | |
| S2K-B-5 | Injector 4 | injector_out | SL4-A-4 | Injection channel 4 | injector_out | corroborated | |
| S2K-B-6 | NC | — | — | — | — | unverified | |
| S2K-B-7 | NC | — | — | — | — | unverified | |
| S2K-B-8 | NC | — | — | — | — | unverified | |
| S2K-B-9 | Power source 2 (main relay) | power_in | SL4-B-1 + SL4-B-4 | ECU 14V supply + Ignition switch input | digital_in + power_in | corroborated | |
| S2K-C-1 | Primary O2 heater | low_side_out | SL4-A-18 | Auxiliary output 9 | hbridge_out | corroborated | |
| S2K-C-10 | VTEC pressure switch | digital_in | SL4-A-21 | Digital input 2 | digital_in | corroborated | |
| S2K-C-11 | Secondary O2 heater control | low_side_out | — | — | — | single_source | |
| S2K-C-12 | Ignition coil 2 | ignition_out | SL4-A-27 | Ignition channel 2 | ignition_out | corroborated | |
| S2K-C-13 | Ignition coil 3 | ignition_out | SL4-A-28 | Ignition channel 3 | ignition_out | corroborated | |
| S2K-C-14 | Ignition coil 4 | ignition_out | SL4-A-29 | Ignition channel 4 | ignition_out | corroborated | |
| S2K-C-15 | Secondary O2 sensor | lambda_nb_in | SL4-B-14 | Analog input 4 | analog_in | corroborated | |
| S2K-C-16 | Primary O2 sensor | lambda_nb_in | SL4-B-13 | Analog input 3 | analog_in | corroborated | |
| S2K-C-17 | MAP sensor | analog_in | SL4-B-11 | Analog input 1 | analog_in | corroborated | |
| S2K-C-18 | Sensor ground 2 | sensor_ground | SL4-B-10 | Analog sensor 0V reference | sensor_ground | corroborated | |
| S2K-C-19 | Sensor 5V supply 1 (MAP) | vref | SL4-B-2 | Sensor supply Vref1 5.0V | vref | corroborated | |
| S2K-C-2 | Alternator control | low_side_out | — | — | — | single_source | |
| S2K-C-20 | Cam (TDC1) sensor + | trigger_in | SL4-B-7 | Sync sensor + | trigger_in | corroborated | |
| S2K-C-21 | Cam (TDC1) sensor − | trigger_in | SL4-B-8 | Sync sensor − | trigger_in | corroborated | |
| S2K-C-22 | Knock sensor | knock_in | — | — | — | conflict | |
| S2K-C-23 | NC | — | — | — | — | unverified | |
| S2K-C-24 | Air pump electric current sensor | analog_in | — | — | — | single_source | |
| S2K-C-25 | Intake air temp sensor | temp_in | SL4-B-21 | Analog input 8 (switchable 1k pull-up) | analog_in | corroborated | |
| S2K-C-26 | Coolant temp sensor | temp_in | SL4-B-20 | Analog input 7 (switchable 1k pull-up) | analog_in | corroborated | |
| S2K-C-27 | Throttle position sensor | analog_in | SL4-B-12 | Analog input 2 | analog_in | corroborated | |
| S2K-C-28 | Sensor 5V supply 2 | vref | SL4-B-2 | Sensor supply Vref1 5.0V | vref | corroborated | |
| S2K-C-29 | Cam (TDC2) sensor + | trigger_in | — | — | — | corroborated | |
| S2K-C-3 | Knock sensor | knock_in | — | — | — | conflict | |
| S2K-C-30 | Cam (TDC2) sensor − | sensor_ground | — | — | — | corroborated | |
| S2K-C-31 | Timing ground | sensor_ground | — | — | — | single_source | |
| S2K-C-4 | Ignition coil 1 | ignition_out | SL4-A-26 | Ignition channel 1 | ignition_out | corroborated | |
| S2K-C-5 | Alternator FR signal | digital_in | — | — | — | single_source | |
| S2K-C-6 | NC | — | — | — | — | unverified | |
| S2K-C-7 | Sensor ground 1 | sensor_ground | SL4-B-10 | Analog sensor 0V reference | sensor_ground | corroborated | |
| S2K-C-8 | Crank sensor + (CKP+) | trigger_in | SL4-B-5 | Crank index sensor + | trigger_in | corroborated | |
| S2K-C-9 | Crank sensor − (CKP−) | trigger_in | SL4-B-6 | Crank index sensor − | trigger_in | corroborated | |
| S2K-D-1 | NC | — | — | — | — | unverified | |
| S2K-D-10 | NC | — | — | — | — | unverified | |
| S2K-D-11 | NC | — | — | — | — | unverified | |
| S2K-D-12 | NC | — | — | — | — | unverified | |
| S2K-D-13 | NC | — | — | — | — | unverified | |
| S2K-D-14 | NC | — | — | — | — | unverified | |
| S2K-D-15 | NC | — | — | — | — | unverified | |
| S2K-D-16 | NC | — | — | — | — | unverified | |
| S2K-D-2 | NC | — | — | — | — | unverified | |
| S2K-D-3 | NC | — | — | — | — | unverified | |
| S2K-D-4 | NC | — | — | — | — | unverified | |
| S2K-D-5 | NC | — | — | — | — | unverified | |
| S2K-D-6 | NC | — | — | — | — | unverified | |
| S2K-D-7 | NC | — | — | — | — | unverified | |
| S2K-D-8 | NC | — | — | — | — | unverified | |
| S2K-D-9 | NC | — | — | — | — | unverified |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | S2K-B-1 | SP-14V-1 | 0.85 | no route | Power source 1 (main relay) | — | |
| W2 | S2K-B-9 | SP-14V-1 | 0.85 | no route | Power source 2 (main relay) | — | |
| W3 | SP-14V-1 | SL4-B-1 | 0.85 | no route | ECU 14V supply | — | |
| W4 | SP-14V-1 | SL4-B-4 | 0.5 | no route | Ignition switch input | — | |
| W5 | S2K-B-2 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W6 | SP-GND-1 | SL4-B-18 | 0.85 | no route | ECU ground | — | |
| W7 | SP-GND-1 | SL4-B-26 | 0.85 | no route | ECU ground | — | |
| W8 | S2K-C-7 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W9 | S2K-C-18 | SP-0V-1 | 0.5 | no route | Sensor ground 2 | — | |
| W10 | SP-0V-1 | SL4-B-10 | 0.5 | no route | Analog sensor 0V reference | — | |
| W11 | S2K-C-19 | SP-5V-1 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W12 | S2K-C-28 | SP-5V-1 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W13 | SP-5V-1 | SL4-B-2 | 0.5 | no route | Sensor supply Vref1 5.0V | — | |
| W14 | S2K-C-8 | SL4-B-5 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W15 | S2K-C-9 | SL4-B-6 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W16 | S2K-C-20 | SL4-B-7 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W17 | S2K-C-21 | SL4-B-8 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W18 | S2K-C-17 | SL4-B-11 | 0.5 | no route | MAP sensor | — | |
| W19 | S2K-C-27 | SL4-B-12 | 0.5 | no route | Throttle position sensor | — | |
| W20 | S2K-C-16 | SL4-B-13 | 0.5 | no route | Primary O2 sensor | — | |
| W21 | S2K-C-15 | SL4-B-14 | 0.5 | no route | Secondary O2 sensor | — | |
| W22 | S2K-C-26 | SL4-B-20 | 0.5 | no route | Coolant temp sensor | — | |
| W23 | S2K-C-25 | SL4-B-21 | 0.5 | no route | Intake air temp sensor | — | |
| W24 | S2K-A-9 | SL4-A-20 | 0.5 | no route | Vehicle speed sensor | — | |
| W25 | S2K-C-10 | SL4-A-21 | 0.5 | no route | VTEC pressure switch | — | |
| W26 | S2K-A-32 | SL4-A-22 | 0.5 | no route | Brake switch | — | |
| W27 | S2K-A-27 | SL4-A-23 | 0.5 | no route | A/C switch (request) | — | |
| W28 | S2K-A-24 | SL4-A-24 | 0.5 | no route | Starter switch signal | — | |
| W29 | S2K-A-26 | SL4-A-25 | 0.5 | no route | Power steering load detect | — | |
| W30 | S2K-B-11 | SL4-A-1 | 0.5 | no route | Injector 1 | — | |
| W31 | S2K-B-3 | SL4-A-2 | 0.5 | no route | Injector 2 | — | |
| W32 | S2K-B-4 | SL4-A-3 | 0.5 | no route | Injector 3 | — | |
| W33 | S2K-B-5 | SL4-A-4 | 0.5 | no route | Injector 4 | — | |
| W34 | S2K-C-4 | SL4-A-26 | 0.5 | no route | Ignition coil 1 | — | |
| W35 | S2K-C-12 | SL4-A-27 | 0.5 | no route | Ignition coil 2 | — | |
| W36 | S2K-C-13 | SL4-A-28 | 0.5 | no route | Ignition coil 3 | — | |
| W37 | S2K-C-14 | SL4-A-29 | 0.5 | no route | Ignition coil 4 | — | |
| W38 | S2K-B-12 | SL4-A-10 | 0.5 | no route | VTEC solenoid | — | |
| W39 | S2K-B-23 | SL4-A-11 | 0.5 | no route | Idle air control valve | — | |
| W40 | S2K-A-15 | SL4-A-12 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W41 | S2K-A-20 | SL4-A-13 | 0.5 | no route | Radiator fan relay | — | |
| W42 | S2K-A-17 | SL4-A-14 | 0.5 | no route | A/C clutch relay | — | |
| W43 | S2K-A-19 | SL4-A-15 | 0.5 | no route | Tacho output | — | |
| W44 | S2K-A-18 | SL4-A-16 | 0.5 | no route | Check engine light (MIL) | — | |
| W45 | S2K-A-1 | SL4-A-17 | 0.5 | no route | Coolant temp gauge drive | — | |
| W46 | S2K-C-1 | SL4-A-18 | 0.5 | no route | Primary O2 heater | — | |
| W47 | S2K-A-6 | SL4-A-19 | 0.5 | no route | Evap canister purge valve | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 179679-6 | TE | S2000 2000–05 ECU harness plug B (25P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179680-5 | TE | S2000 2000–05 ECU harness plug C (31P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179681-6 | TE | S2000 2000–05 ECU harness plug A (32P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | 4-1437290-1 | TE | Superseal 1.0 34-way plug, Key 2 | 1.000 | ea |
| connector | S2K-0005-ECU-D | Honda | S2000 2000–05 ECU plug D (P/N unknown) | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (12)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | S2K-A-15 ↔ SL4-A-12 | S2K-A-15 "Fuel pump relay (USDM)" [low_side_out] is wired to SL4-A-12 "Auxiliary output 3" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-A-17 ↔ SL4-A-14 | S2K-A-17 "A/C clutch relay" [low_side_out] is wired to SL4-A-14 "Auxiliary output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-A-18 ↔ SL4-A-16 | S2K-A-18 "Check engine light (MIL)" [low_side_out] is wired to SL4-A-16 "Auxiliary output 7" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-A-19 ↔ SL4-A-15 | S2K-A-19 "Tacho output" [tacho_out] is wired to SL4-A-15 "Auxiliary output 6" [switch_out]. Frequency output on a general output: set it up as a tacho/frequency output with the right pull-up. |
| info | NET_FAMILY | S2K-A-1 ↔ SL4-A-17 | S2K-A-1 "Coolant temp gauge drive" [low_side_out] is wired to SL4-A-17 "Auxiliary output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-A-20 ↔ SL4-A-13 | S2K-A-20 "Radiator fan relay" [low_side_out] is wired to SL4-A-13 "Auxiliary output 4" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-B-12 ↔ SL4-A-10 | S2K-B-12 "VTEC solenoid" [high_side_out] is wired to SL4-A-10 "Auxiliary output 1" [switch_out]. Configure this output as high side. |
| info | NET_FAMILY | S2K-B-1 ↔ SL4-B-4 | S2K-B-1 "Power source 1 (main relay)" [power_in] is wired to SL4-B-4 "Ignition switch input" [digital_in]. Switched supply used as the ignition-on sense. |
| info | NET_FAMILY | S2K-B-23 ↔ SL4-A-11 | S2K-B-23 "Idle air control valve" [low_side_out] is wired to SL4-A-11 "Auxiliary output 2" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-C-25 ↔ SL4-B-21 | S2K-C-25 "Intake air temp sensor" [temp_in] is wired to SL4-B-21 "Analog input 8 (switchable 1k pull-up)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | S2K-C-26 ↔ SL4-B-20 | S2K-C-26 "Coolant temp sensor" [temp_in] is wired to SL4-B-20 "Analog input 7 (switchable 1k pull-up)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | UNMAPPED | OEM | 26 optional OEM pins are not mapped: S2K-A-10 Service check signal; S2K-A-12 Immobilizer indicator light; S2K-A-13 Immobilizer enable signal; S2K-A-16 Fuel pump relay (JDM); S2K-A-2 Air control valve solenoid; S2K-A-21 K-Line; S2K-A-23 Secondary O2 sensor; S2K-A-25 Immobilizer code; S2K-A-28 Air pump relay; S2K-A-29 Fuel tank pressure sensor; S2K-A-3 Evap bypass solenoid; S2K-A-30 Electrical load detector; S2K-A-4 Evap canister vent shut valve; S2K-B-10 Power ground 2; S2K-B-20 Ground; S2K-B-21 Backup power (battery constant); S2K-B-22 Ground; S2K-C-11 Secondary O2 heater control; S2K-C-2 Alternator control; S2K-C-22 Knock sensor; S2K-C-24 Air pump electric current sensor; S2K-C-29 Cam (TDC2) sensor +; S2K-C-3 Knock sensor; S2K-C-30 Cam (TDC2) sensor −; S2K-C-31 Timing ground; S2K-C-5 Alternator FR signal |
Accepted (3)
| Code | Subject | Reason | By |
|---|---|---|---|
| SUPPLY_GROUP | S2K-C-19 + S2K-C-28 + SL4-B-2 + SP-5V-1 | Emtron has one 5V reference; the OEM ECU's separate 5V supplies are joined. Decision pending (see document). | mapping-proposal |
| NET_FAMILY | S2K-A-6 ↔ SL4-A-19 | Aux 10 half-bridge configured as low side. | mapping-proposal |
| NET_FAMILY | S2K-C-1 ↔ SL4-A-18 | Aux 9 half-bridge configured as low side. | mapping-proposal |
Notes
No notes.
Sources
| Reliability | Kind | Title | URL |
|---|---|---|---|
| 4 | vendor_doc | AEM 30-6052 Series 2 Plug & Play EMS, 2000–2005 S2000 (original ECU pinout) | https://documents.aemelectronics.com/techlibrary_30-6052_series_2_plug___play_ems.pdf |
| 4 | datasheet | Emtron SL4/SL6/SL8 ECU datasheets | https://docs.emtronaustralia.com.au/engine-management/datasheets/index.html |
| 4 | vendor_doc | Emtron SL4/SL6/SL8 pinout pages | https://docs.emtronaustralia.com.au/engine-management/wiring/index.html |
| 4 | vendor_doc | Haltech KB: F20C (AP1) engine | https://support.haltech.com/portal/en/kb/articles/f20c-ap1-engine |
| 4 | vendor_doc | Link S2000 AP1 PlugIn installation manual | https://linkecu.com/documentation/S2000X.pdf |
| 2 | forum | AllPinouts: 2000–2005 Honda S2000 ECU | https://allpinouts.org/pinouts/connectors/car/2000-2005-honda-s2000-ecu/ |
| 2 | forum | Autodata blog: ECU Pinout Honda S2000 2000-2004 | http://autodatas.blogspot.com/2012/11/ecu-pinout-honda-s2000-2000-2004.html |
| 2 | derived | Typical load estimates (relay coil ~0.2 A, high-Z injector ~1.2 A, VVT solenoid ~1 A) | — |