S2000 2000–05 (AP1 / AP2 04–05) → Emtron Shadow 8
AP1 2000–03 (F20C) — Emtron — Shadow 8
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 | — | W47 | — | 0.5 | SH8-B-17 | — | — | — |
| 2 | Air control valve solenoid | — | — | — | — | — | — | — | — |
| 3 | Evap bypass solenoid | — | — | — | — | — | — | — | — |
| 4 | Evap canister vent shut valve | — | W52 | — | 0.5 | SH8-B-6 | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | Evap canister purge valve | — | W49 | — | 0.5 | SH8-B-23 | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Vehicle speed sensor | — | W26 | — | 0.5 | SH8-A-26 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | — | — | — | — | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W42 | — | 0.5 | SH8-B-11 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | — | — | — | — | — | — | — |
| 17 | A/C clutch relay | — | W44 | — | 0.5 | SH8-B-13 | — | — | — |
| 18 | Check engine light (MIL) | — | W46 | — | 0.5 | SH8-B-16 | — | — | — |
| 19 | Tacho output | — | W45 | — | 0.5 | SH8-B-15 | — | — | — |
| 20 | Radiator fan relay | — | W43 | — | 0.5 | SH8-B-12 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | — | — | — | — | — | — | — |
| 24 | Starter switch signal | — | W30 | — | 0.5 | SH8-A-30 | — | — | — |
| 25 | Immobilizer code | — | — | — | — | — | — | — | — |
| 26 | Power steering load detect | — | W31 | — | 0.5 | SH8-A-31 | — | — | — |
| 27 | A/C switch (request) | — | W29 | — | 0.5 | SH8-A-29 | — | — | — |
| 28 | Air pump relay | — | W51 | — | 0.5 | SH8-B-25 | — | — | — |
| 29 | Fuel tank pressure sensor | — | — | — | — | — | — | — | — |
| 30 | Electrical load detector | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | Brake switch | — | W28 | — | 0.5 | SH8-A-28 | — | — | — |
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 | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Injector 2 | — | W33 | — | 0.5 | SH8-B-3 | — | — | — |
| 4 | Injector 3 | — | W34 | — | 0.5 | SH8-B-4 | — | — | — |
| 5 | Injector 4 | — | W35 | — | 0.5 | SH8-B-5 | — | — | — |
| 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 | — | W32 | — | 0.5 | SH8-B-2 | — | — | — |
| 12 | VTEC solenoid | — | W40 | — | 0.5 | SH8-B-14 | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
| 17 | NC | — | — | — | — | — | — | — | — |
| 18 | NC | — | — | — | — | — | — | — | — |
| 19 | NC | — | — | — | — | — | — | — | — |
| 20 | Ground | — | — | — | — | — | — | — | — |
| 21 | Backup power (battery constant) | — | W5 | — | 0.85 | SH8-B-1 | — | — | — |
| 22 | Ground | — | — | — | — | — | — | — | — |
| 23 | Idle air control valve | — | W41 | — | 0.5 | SH8-B-10 | — | — | — |
| 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 | — | W48 | — | 0.5 | SH8-B-22 | — | — | — |
| 2 | Alternator control | — | W50 | — | 0.5 | SH8-B-24 | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W36 | — | 0.5 | SH8-B-27 | — | — | — |
| 5 | Alternator FR signal | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W15 | — | 0.5 | SH8-A-5 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W16 | — | 0.5 | SP-TRG-1 | — | — | — |
| 10 | VTEC pressure switch | — | W27 | — | 0.5 | SH8-A-27 | — | — | — |
| 11 | Secondary O2 heater control | — | — | — | — | — | — | — | — |
| 12 | Ignition coil 2 | — | W37 | — | 0.5 | SH8-B-28 | — | — | — |
| 13 | Ignition coil 3 | — | W38 | — | 0.5 | SH8-B-29 | — | — | — |
| 14 | Ignition coil 4 | — | W39 | — | 0.5 | SH8-B-30 | — | — | — |
| 15 | Secondary O2 sensor | — | W23 | — | 0.5 | SH8-A-13 | — | — | — |
| 16 | Primary O2 sensor | — | W22 | — | 0.5 | SH8-A-12 | — | — | — |
| 17 | MAP sensor | — | W20 | — | 0.5 | SH8-A-10 | — | — | — |
| 18 | Sensor ground 2 | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W12 | — | 0.5 | SP-5V-1 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W17 | — | 0.5 | SH8-A-6 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W18 | — | 0.5 | SP-TRG-1 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | — | — | — | — | — | — | — |
| 25 | Intake air temp sensor | — | W25 | — | 0.5 | SH8-A-20 | — | — | — |
| 26 | Coolant temp sensor | — | W24 | — | 0.5 | SH8-A-19 | — | — | — |
| 27 | Throttle position sensor | — | W21 | — | 0.5 | SH8-A-11 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W13 | — | 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 | — | — | — | — | — | — | — | — |
SH8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | 8.0V sensor supply | — | — | — | — | — | — | — | — |
| 3 | 5.0V sensor supply | — | W14 | — | 0.5 | SP-5V-1 | — | — | — |
| 4 | 0V analog reference | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Crank position sensor | — | W15 | — | 0.5 | S2K-C-8 | — | — | — |
| 6 | Sync position sensor | — | W17 | — | 0.5 | S2K-C-20 | — | — | — |
| 7 | Trigger ground | — | W19 | — | 0.5 | SP-TRG-1 | — | — | — |
| 8 | Shield | — | — | — | — | — | — | — | — |
| 9 | Ground 1 | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Analog voltage 1 | — | W20 | — | 0.5 | S2K-C-17 | — | — | — |
| 11 | Analog voltage 2 | — | W21 | — | 0.5 | S2K-C-27 | — | — | — |
| 12 | Analog voltage 3 | — | W22 | — | 0.5 | S2K-C-16 | — | — | — |
| 13 | Analog voltage 4 | — | W23 | — | 0.5 | S2K-C-15 | — | — | — |
| 14 | Analog voltage 5 | — | — | — | — | — | — | — | — |
| 15 | CAN bus 1 high | — | — | — | — | — | — | — | — |
| 16 | Knock 1 + | — | — | — | — | — | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | Analog voltage 6 | — | — | — | — | — | — | — | — |
| 19 | Analog voltage 7 (switchable 1k pull-up) | — | W24 | — | 0.5 | S2K-C-26 | — | — | — |
| 20 | Analog voltage 8 (switchable 1k pull-up) | — | W25 | — | 0.5 | S2K-C-25 | — | — | — |
| 21 | Analog voltage 9 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 22 | Analog voltage 10 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 23 | CAN bus 1 low | — | — | — | — | — | — | — | — |
| 24 | Knock 2 + | — | — | — | — | — | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | Digital input 1 | — | W26 | — | 0.5 | S2K-A-9 | — | — | — |
| 27 | Digital input 2 | — | W27 | — | 0.5 | S2K-C-10 | — | — | — |
| 28 | Digital input 3 | — | W28 | — | 0.5 | S2K-A-32 | — | — | — |
| 29 | Digital input 4 | — | W29 | — | 0.5 | S2K-A-27 | — | — | — |
| 30 | Digital input 5 | — | W30 | — | 0.5 | S2K-A-24 | — | — | — |
| 31 | Digital input 6 | — | W31 | — | 0.5 | S2K-A-26 | — | — | — |
| 32 | CAN bus 2 high | — | — | — | — | — | — | — | — |
| 33 | CAN bus 2 low | — | — | — | — | — | — | — | — |
| 34 | Ground 2 | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
SH8-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (HOT) supply | — | W5 | — | 0.85 | S2K-B-21 | — | — | — |
| 2 | Injector cylinder 1 | — | W32 | — | 0.5 | S2K-B-11 | — | — | — |
| 3 | Injector cylinder 2 | — | W33 | — | 0.5 | S2K-B-3 | — | — | — |
| 4 | Injector cylinder 3 | — | W34 | — | 0.5 | S2K-B-4 | — | — | — |
| 5 | Injector cylinder 4 | — | W35 | — | 0.5 | S2K-B-5 | — | — | — |
| 6 | Injector cylinder 5 | — | W52 | — | 0.5 | S2K-A-4 | — | — | — |
| 7 | Injector cylinder 6 | — | — | — | — | — | — | — | — |
| 8 | Injector cylinder 7 | — | — | — | — | — | — | — | — |
| 9 | Injector cylinder 8 | — | — | — | — | — | — | — | — |
| 10 | Aux output 1 | — | W41 | — | 0.5 | S2K-B-23 | — | — | — |
| 11 | Aux output 2 | — | W42 | — | 0.5 | S2K-A-15 | — | — | — |
| 12 | Aux output 3 | — | W43 | — | 0.5 | S2K-A-20 | — | — | — |
| 13 | Aux output 4 | — | W44 | — | 0.5 | S2K-A-17 | — | — | — |
| 14 | Aux output 5 | — | W40 | — | 0.5 | S2K-B-12 | — | — | — |
| 15 | Aux output 6 | — | W45 | — | 0.5 | S2K-A-19 | — | — | — |
| 16 | Aux output 7 | — | W46 | — | 0.5 | S2K-A-18 | — | — | — |
| 17 | Aux output 8 | — | W47 | — | 0.5 | S2K-A-1 | — | — | — |
| 18 | Digital input 7 | — | — | — | — | — | — | — | — |
| 19 | Digital input 8 | — | — | — | — | — | — | — | — |
| 20 | Digital input 9 | — | — | — | — | — | — | — | — |
| 21 | Digital input 10 / ignition switch | — | W4 | — | 0.5 | SP-14V-1 | — | — | — |
| 22 | Aux output 9 | — | W48 | — | 0.5 | S2K-C-1 | — | — | — |
| 23 | Aux output 10 | — | W49 | — | 0.5 | S2K-A-6 | — | — | — |
| 24 | Aux output 11 | — | W50 | — | 0.5 | S2K-C-2 | — | — | — |
| 25 | Aux output 12 | — | W51 | — | 0.5 | S2K-A-28 | — | — | — |
| 26 | Aux 9–12 power supply | — | — | — | — | — | — | — | — |
| 27 | Ignition TTL cylinder 1 | — | W36 | — | 0.5 | S2K-C-4 | — | — | — |
| 28 | Ignition TTL cylinder 2 | — | W37 | — | 0.5 | S2K-C-12 | — | — | — |
| 29 | Ignition TTL cylinder 3 | — | W38 | — | 0.5 | S2K-C-13 | — | — | — |
| 30 | Ignition TTL cylinder 4 | — | W39 | — | 0.5 | S2K-C-14 | — | — | — |
| 31 | Ignition TTL cylinder 5 | — | — | — | — | — | — | — | — |
| 32 | Ignition TTL cylinder 6 | — | — | — | — | — | — | — | — |
| 33 | Ignition TTL cylinder 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition TTL cylinder 8 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | S2K-C-7 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | S2K-C-18 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | SH8-A-4 | — | — | — |
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 | SH8-A-1 | — | — | — |
| 1 | — | — | W4 | — | 0.5 | SH8-B-21 | — | — | — |
SP-5V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W12 | — | 0.5 | S2K-C-19 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | S2K-C-28 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | SH8-A-3 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | S2K-B-2 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | SH8-A-9 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | SH8-A-34 | — | — | — |
SP-TRG
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W16 | — | 0.5 | S2K-C-9 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | S2K-C-21 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | SH8-A-7 | — | — | — |
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 | SH8-B-17 | Aux 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 | SH8-B-11 | Aux output 2 | low_side_out | corroborated | |
| S2K-A-16 | Fuel pump relay (JDM) | low_side_out | — | — | — | single_source | |
| S2K-A-17 | A/C clutch relay | low_side_out | SH8-B-13 | Aux output 4 | low_side_out | corroborated | |
| S2K-A-18 | Check engine light (MIL) | low_side_out | SH8-B-16 | Aux output 7 | switch_out | corroborated | |
| S2K-A-19 | Tacho output | tacho_out | SH8-B-15 | Aux 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 | SH8-B-12 | Aux output 3 | low_side_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 | SH8-A-30 | Digital input 5 | digital_in | corroborated | |
| S2K-A-25 | Immobilizer code | — | — | — | — | single_source | |
| S2K-A-26 | Power steering load detect | digital_in | SH8-A-31 | Digital input 6 | digital_in | corroborated | |
| S2K-A-27 | A/C switch (request) | digital_in | SH8-A-29 | Digital input 4 | digital_in | corroborated | |
| S2K-A-28 | Air pump relay | low_side_out | SH8-B-25 | Aux output 12 | hbridge_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 | SH8-A-28 | Digital input 3 | digital_in | corroborated | |
| S2K-A-4 | Evap canister vent shut valve | low_side_out | SH8-B-6 | Injector cylinder 5 | injector_out | single_source | |
| S2K-A-5 | NC | — | — | — | — | unverified | |
| S2K-A-6 | Evap canister purge valve | low_side_out | SH8-B-23 | Aux output 10 | hbridge_out | single_source | |
| S2K-A-7 | NC | — | — | — | — | unverified | |
| S2K-A-8 | NC | — | — | — | — | unverified | |
| S2K-A-9 | Vehicle speed sensor | digital_in | SH8-A-26 | Digital input 1 | digital_in | corroborated | |
| S2K-B-1 | Power source 1 (main relay) | power_in | SH8-A-1 + SH8-B-21 | ECU supply + Digital input 10 / ignition switch | digital_in + power_in | corroborated | |
| S2K-B-10 | Power ground 2 | ground | — | — | — | single_source | |
| S2K-B-11 | Injector 1 | injector_out | SH8-B-2 | Injector cylinder 1 | injector_out | corroborated | |
| S2K-B-12 | VTEC solenoid | high_side_out | SH8-B-14 | Aux output 5 | 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 | SH8-A-34 + SH8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| S2K-B-20 | Ground | ground | — | — | — | single_source | |
| S2K-B-21 | Backup power (battery constant) | power_in | SH8-B-1 | Battery constant (HOT) supply | power_in | single_source | |
| S2K-B-22 | Ground | ground | — | — | — | single_source | |
| S2K-B-23 | Idle air control valve | low_side_out | SH8-B-10 | Aux output 1 | low_side_out | corroborated | |
| S2K-B-24 | NC | — | — | — | — | unverified | |
| S2K-B-25 | NC | — | — | — | — | unverified | |
| S2K-B-3 | Injector 2 | injector_out | SH8-B-3 | Injector cylinder 2 | injector_out | corroborated | |
| S2K-B-4 | Injector 3 | injector_out | SH8-B-4 | Injector cylinder 3 | injector_out | corroborated | |
| S2K-B-5 | Injector 4 | injector_out | SH8-B-5 | Injector cylinder 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 | SH8-A-1 + SH8-B-21 | ECU supply + Digital input 10 / ignition switch | digital_in + power_in | corroborated | |
| S2K-C-1 | Primary O2 heater | low_side_out | SH8-B-22 | Aux output 9 | hbridge_out | corroborated | |
| S2K-C-10 | VTEC pressure switch | digital_in | SH8-A-27 | 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 | SH8-B-28 | Ignition TTL cylinder 2 | ignition_out | corroborated | |
| S2K-C-13 | Ignition coil 3 | ignition_out | SH8-B-29 | Ignition TTL cylinder 3 | ignition_out | corroborated | |
| S2K-C-14 | Ignition coil 4 | ignition_out | SH8-B-30 | Ignition TTL cylinder 4 | ignition_out | corroborated | |
| S2K-C-15 | Secondary O2 sensor | lambda_nb_in | SH8-A-13 | Analog voltage 4 | analog_in | corroborated | |
| S2K-C-16 | Primary O2 sensor | lambda_nb_in | SH8-A-12 | Analog voltage 3 | analog_in | corroborated | |
| S2K-C-17 | MAP sensor | analog_in | SH8-A-10 | Analog voltage 1 | analog_in | corroborated | |
| S2K-C-18 | Sensor ground 2 | sensor_ground | SH8-A-4 | 0V analog reference | sensor_ground | corroborated | |
| S2K-C-19 | Sensor 5V supply 1 (MAP) | vref | SH8-A-3 | 5.0V sensor supply | vref | corroborated | |
| S2K-C-2 | Alternator control | low_side_out | SH8-B-24 | Aux output 11 | hbridge_out | single_source | |
| S2K-C-20 | Cam (TDC1) sensor + | trigger_in | SH8-A-6 | Sync position sensor | trigger_in | corroborated | |
| S2K-C-21 | Cam (TDC1) sensor − | trigger_in | SH8-A-7 | Trigger ground | sensor_ground | 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 | SH8-A-20 | Analog voltage 8 (switchable 1k pull-up) | analog_in | corroborated | |
| S2K-C-26 | Coolant temp sensor | temp_in | SH8-A-19 | Analog voltage 7 (switchable 1k pull-up) | analog_in | corroborated | |
| S2K-C-27 | Throttle position sensor | analog_in | SH8-A-11 | Analog voltage 2 | analog_in | corroborated | |
| S2K-C-28 | Sensor 5V supply 2 | vref | SH8-A-3 | 5.0V sensor supply | 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 | SH8-B-27 | Ignition TTL cylinder 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 | SH8-A-4 | 0V analog reference | sensor_ground | corroborated | |
| S2K-C-8 | Crank sensor + (CKP+) | trigger_in | SH8-A-5 | Crank position sensor | trigger_in | corroborated | |
| S2K-C-9 | Crank sensor − (CKP−) | trigger_in | SH8-A-7 | Trigger ground | sensor_ground | 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 | SH8-A-1 | 0.85 | no route | ECU supply | — | |
| W4 | SP-14V-1 | SH8-B-21 | 0.5 | no route | Digital input 10 / ignition switch | — | |
| W5 | S2K-B-21 | SH8-B-1 | 0.85 | no route | Backup power (battery constant) | — | |
| W6 | S2K-B-2 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W7 | SP-GND-1 | SH8-A-9 | 0.85 | no route | Ground 1 | — | |
| W8 | SP-GND-1 | SH8-A-34 | 0.85 | no route | Ground 2 | — | |
| W9 | S2K-C-7 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W10 | S2K-C-18 | SP-0V-1 | 0.5 | no route | Sensor ground 2 | — | |
| W11 | SP-0V-1 | SH8-A-4 | 0.5 | no route | 0V analog reference | — | |
| W12 | S2K-C-19 | SP-5V-1 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W13 | S2K-C-28 | SP-5V-1 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W14 | SP-5V-1 | SH8-A-3 | 0.5 | no route | 5.0V sensor supply | — | |
| W15 | S2K-C-8 | SH8-A-5 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W16 | S2K-C-9 | SP-TRG-1 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W17 | S2K-C-20 | SH8-A-6 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W18 | S2K-C-21 | SP-TRG-1 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W19 | SP-TRG-1 | SH8-A-7 | 0.5 | no route | Trigger ground | — | |
| W20 | S2K-C-17 | SH8-A-10 | 0.5 | no route | MAP sensor | — | |
| W21 | S2K-C-27 | SH8-A-11 | 0.5 | no route | Throttle position sensor | — | |
| W22 | S2K-C-16 | SH8-A-12 | 0.5 | no route | Primary O2 sensor | — | |
| W23 | S2K-C-15 | SH8-A-13 | 0.5 | no route | Secondary O2 sensor | — | |
| W24 | S2K-C-26 | SH8-A-19 | 0.5 | no route | Coolant temp sensor | — | |
| W25 | S2K-C-25 | SH8-A-20 | 0.5 | no route | Intake air temp sensor | — | |
| W26 | S2K-A-9 | SH8-A-26 | 0.5 | no route | Vehicle speed sensor | — | |
| W27 | S2K-C-10 | SH8-A-27 | 0.5 | no route | VTEC pressure switch | — | |
| W28 | S2K-A-32 | SH8-A-28 | 0.5 | no route | Brake switch | — | |
| W29 | S2K-A-27 | SH8-A-29 | 0.5 | no route | A/C switch (request) | — | |
| W30 | S2K-A-24 | SH8-A-30 | 0.5 | no route | Starter switch signal | — | |
| W31 | S2K-A-26 | SH8-A-31 | 0.5 | no route | Power steering load detect | — | |
| W32 | S2K-B-11 | SH8-B-2 | 0.5 | no route | Injector 1 | — | |
| W33 | S2K-B-3 | SH8-B-3 | 0.5 | no route | Injector 2 | — | |
| W34 | S2K-B-4 | SH8-B-4 | 0.5 | no route | Injector 3 | — | |
| W35 | S2K-B-5 | SH8-B-5 | 0.5 | no route | Injector 4 | — | |
| W36 | S2K-C-4 | SH8-B-27 | 0.5 | no route | Ignition coil 1 | — | |
| W37 | S2K-C-12 | SH8-B-28 | 0.5 | no route | Ignition coil 2 | — | |
| W38 | S2K-C-13 | SH8-B-29 | 0.5 | no route | Ignition coil 3 | — | |
| W39 | S2K-C-14 | SH8-B-30 | 0.5 | no route | Ignition coil 4 | — | |
| W40 | S2K-B-12 | SH8-B-14 | 0.5 | no route | VTEC solenoid | — | |
| W41 | S2K-B-23 | SH8-B-10 | 0.5 | no route | Idle air control valve | — | |
| W42 | S2K-A-15 | SH8-B-11 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W43 | S2K-A-20 | SH8-B-12 | 0.5 | no route | Radiator fan relay | — | |
| W44 | S2K-A-17 | SH8-B-13 | 0.5 | no route | A/C clutch relay | — | |
| W45 | S2K-A-19 | SH8-B-15 | 0.5 | no route | Tacho output | — | |
| W46 | S2K-A-18 | SH8-B-16 | 0.5 | no route | Check engine light (MIL) | — | |
| W47 | S2K-A-1 | SH8-B-17 | 0.5 | no route | Coolant temp gauge drive | — | |
| W48 | S2K-C-1 | SH8-B-22 | 0.5 | no route | Primary O2 heater | — | |
| W49 | S2K-A-6 | SH8-B-23 | 0.5 | no route | Evap canister purge valve | — | |
| W50 | S2K-C-2 | SH8-B-24 | 0.5 | no route | Alternator control | — | |
| W51 | S2K-A-28 | SH8-B-25 | 0.5 | no route | Air pump relay | — | |
| W52 | S2K-A-4 | SH8-B-6 | 0.5 | no route | Evap canister vent shut 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 (10)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | S2K-A-18 ↔ SH8-B-16 | S2K-A-18 "Check engine light (MIL)" [low_side_out] is wired to SH8-B-16 "Aux output 7" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-A-19 ↔ SH8-B-15 | S2K-A-19 "Tacho output" [tacho_out] is wired to SH8-B-15 "Aux 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 ↔ SH8-B-17 | S2K-A-1 "Coolant temp gauge drive" [low_side_out] is wired to SH8-B-17 "Aux output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | S2K-A-4 ↔ SH8-B-6 | S2K-A-4 "Evap canister vent shut valve" [low_side_out] is wired to SH8-B-6 "Injector cylinder 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | S2K-B-12 ↔ SH8-B-14 | S2K-B-12 "VTEC solenoid" [high_side_out] is wired to SH8-B-14 "Aux output 5" [switch_out]. Configure this output as high side. |
| info | NET_FAMILY | S2K-B-1 ↔ SH8-B-21 | S2K-B-1 "Power source 1 (main relay)" [power_in] is wired to SH8-B-21 "Digital input 10 / ignition switch" [digital_in]. Switched supply used as the ignition-on sense. |
| info | NET_FAMILY | S2K-C-21 ↔ SH8-A-7 | S2K-C-21 "Cam (TDC1) sensor −" [trigger_in] is wired to SH8-A-7 "Trigger ground" [sensor_ground]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | S2K-C-25 ↔ SH8-A-20 | S2K-C-25 "Intake air temp sensor" [temp_in] is wired to SH8-A-20 "Analog voltage 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 ↔ SH8-A-19 | S2K-C-26 "Coolant temp sensor" [temp_in] is wired to SH8-A-19 "Analog voltage 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 | 22 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-29 Fuel tank pressure sensor; S2K-A-3 Evap bypass solenoid; S2K-A-30 Electrical load detector; S2K-B-10 Power ground 2; S2K-B-20 Ground; S2K-B-22 Ground; S2K-C-11 Secondary O2 heater 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 (6)
| Code | Subject | Reason | By |
|---|---|---|---|
| NET_MERGED | S2K-C-21 + S2K-C-9 + SH8-A-7 + SP-TRG-1 | Shadow 8 crank and sync inputs are single-ended: both VR returns go to trigger ground A7 by design. | mapping-proposal |
| SUPPLY_GROUP | S2K-C-19 + S2K-C-28 + SH8-A-3 + 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-28 ↔ SH8-B-25 | Half-bridge configured as low side. | mapping-proposal |
| NET_FAMILY | S2K-A-6 ↔ SH8-B-23 | Half-bridge configured as low side. | mapping-proposal |
| NET_FAMILY | S2K-C-1 ↔ SH8-B-22 | Half-bridge configured as low side. | mapping-proposal |
| NET_FAMILY | S2K-C-2 ↔ SH8-B-24 | 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 Shadow 8 ECU datasheet | https://docs.emtronaustralia.com.au/engine-management/datasheets/shadow-8-datasheet/index.html |
| 4 | vendor_doc | Emtron Shadow 8 pinout | https://docs.emtronaustralia.com.au/engine-management/wiring/shadow-8/shadow-8-pinout/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) | — |