The PK3 ECU was utilized in 1990–1991 Honda Prelude models equipped with the B20A DOHC non-VTEC engine.

Overview#

The PK3 is an OBD0-based engine control unit. It is designed for naturally aspirated, non-VTEC DOHC configurations.

Note

This ECU utilizes electronic ignition timing control. Ensure all ignition components are calibrated to factory specifications when troubleshooting timing-related issues.

Technical Specifications#

• Engine: B20A (DOHC, non-VTEC)
• Vehicle Application: 1990–1991 Honda Prelude
• OBD Standard: OBD0

Diagnostics#

Use the following tool to reference error codes associated with this ECU generation:

Wiring Reference#

For integration or diagnostic purposes, refer to the standard OBD0 ECU pinout configurations.

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