K20a Ecu Pinout High Quality -

| Pin | Wire Color (Typ) | Function | Description | | :--- | :--- | :--- | :--- | | | GRN/YEL | PCS | EVAP Purge Control Solenoid | | 5 | WHT/BLK | ALTL | Alternator L Signal | | 7 | WHT | IMA | Idle Air Control Valve Signal | | 9 | RED/YEL | ATPD3 | Transmission Position Switch | | 12 | WHT/BLU | IMOCD | Immobilizer Code Line (Loop to Key Ring) | | 14 | BLK/YEL | INJ4 | Injector #4 | | 15 | RED/BLU | INJ3 | Injector #3 | | 16 | BLU/YEL | INJ2 | Injector #2 | | 17 | YEL/BLU | INJ1 | Injector #1 | | 20 | GRN/RED | ILK | Illumination | | 21 | WHT/BLU | VCC3 | Sensor Voltage (+5V) | | 24 | BLU | NEP | Engine Speed (Tachometer Output) | | 25 | RED/YEL | IGP4 | Ignition Power | | 26 | RED | FLR | Fuel Pump Relay Control | | 27 | YEL/GRN | IMOFP | Immobilizer Output |

The PRB ECU is an OEM ECU and has an immobilizer system. k20a ecu pinout

VTEC Solenoid. This pin activates the VTEC system when specific RPM, oil pressure, and temperature parameters are met. | Pin | Wire Color (Typ) | Function

| Function | ECU Pin | Wire Color | Use | |----------|---------|------------|-----| | +12V Constant | A1 | Red/Black | Memory | | +12V Switched | B4, B5, D16 | Black/Yellow | Main Power | | Main Grounds | B1, B2, B3 | Black | Power Ground | | Sensor Ground | A2, C3 | Yellow/Black | Signal Ground | | Check Engine Light | B14 | Blue/White | Ground to illuminate | | SCS (Jump to ground) | B16 | Blue/Orange | Flash codes | | Function | ECU Pin | Wire Color

When wiring a K20A into a different chassis (like an EG Civic or DC2 Integra), certain pins are mandatory for the engine to run. Critical Power and Grounds

This guide focuses on the commonly found in 02-04 K20A engines.

This connector handles the main sensors, injectors, and ignition.