K20a Ecu Pinout

The K20A wiring harness is complex, but breaking it down by connector makes it manageable. Always use a Digital Multimeter to verify continuity between the sensor plug and the ECU pin before assuming a sensor is bad.

| Pin | Wire Color | Signal | Description | |-----|------------|--------|--------------| | D1 | White/Red | LAF+ | Wideband O2 Sensor (+) | | D2 | White/Blue | LAF- | Wideband O2 Sensor (-) | | D3 | Green/White | O2H | O2 Heater Ground | | D4 | N/C | - | Not Used | | D5 | Orange | K-LINE | Diagnostic Line (K-Line) | | D6 | Green/Red | SCS | Service Check (Alternate) | | D7 | N/C | - | Not Used | | D8 | N/C | - | Not Used | | D9 | Blue | IMMO | Immobilizer Data Line | | D10 | Red/Black | VBSOL | VTEC Solenoid (Power) | | D11 | N/C | - | Not Used | | D12 | Green/Yellow | FLS | Fuel Level Sensor | | D13 | Yellow | BKSW | Brake Switch Input | | D14 | White | WARN | Warning Light Output | | D15 | N/C | - | Not Used | | D16 | Black/Yellow | IGP3 | Main Relay Power | k20a ecu pinout

| Pin | Wire Color | Signal | Description | |-----|------------|--------|--------------| | A1 | Red/Black | VBU | Backup Power (Memory) | | A2 | Yellow/Black | SG2 | Sensor Ground | | A3 | White | VCC1 | 5V Sensor Power | | A4 | Red | VCC2 | 5V Sensor Power 2 | | A5 | Green/White | MAP | Manifold Abs. Pressure | | A6 | Red/Yellow | TPS | Throttle Position | | A7 | Light Green | ECT | Engine Coolant Temp | | A8 | Red/Blue | IAT | Intake Air Temp | | A9 | Blue/Green | VTP | VTEC Pressure Switch | | A10 | Brown/Black | KS | Knock Sensor | | A11 | Blue/Yellow | CKP | Crank Position (-) | | A12 | Blue | CKP+ | Crank Position (+) | | A13 | Orange | CKPP | Crank Shield/Gnd | | A14 | Yellow/Green | CMP A | Cylinder Sensor (TDC) | | A15 | Yellow/Blue | CMP B | Cylinder Sensor (CYP) | | A16 | Yellow | CMPP | CMP Shield | | A17 | N/C | - | Not Used | | A18 | White/Black | ELD | Electric Load Detector | | A19 | Green/Orange | VSS | Vehicle Speed Sensor | | A20 | Pink | ALTC | Alternator Control | | A21 | Green | LS | Oil Pressure Switch | | A22 | Light Green/Red | VBSOL | VTEC Solenoid Valve | The K20A wiring harness is complex, but breaking

VTEC Pressure Switch (on some models). Many tuners bypass this using software like Hondata , but for a factory-style install, it must be pinned. Vital Sensor Inputs B19 (BLU/WHT): Camshaft Position Sensor A (Intake). Pressure | | A6 | Red/Yellow | TPS