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OBD1 Civic / Integra / Prelude ECU Pin Schematics
Author: Katman / Created: April. 06 / Last Updated: September. 06

SYNOPSIS

This article exploits a combination of ECU pin locations and wire colors for all M/T '92-95 Civic / '92-95 Integra / '92-95 Prelude VTEC and NON-VTEC vehicles.

OBD1 PLUG CONFIGURATION

Below is an example that shows the common onboard male connectors for a Honda OBD1 ECU.
Take note of plugs: A, B, and D.

The 4-plug OBD1 connector image below is proof these do exist and are usually found on JDM AUTO 92-95 Civic, Integra, and Preludes.
Sorry - I do not have pin schematics for the JDM 4-plug OBD1 ecu! Although, connectors A B D should technically be the same pin locations as a 5spd 3-plug OBD1 ECU.

OBD2a plug configuration


OBD1 plug configuration

ADDITIONAL INFORMATION

These pin-out locations were cross-referenced with OBD1 Civic/Integra/Prelude Helm's service manuals.

The information in this article applies to:

  • All US & JDM OBD1 (92-95) M/T civic ecu's
  • All US & JDM OBD1 (92-95) M/T integra ecu's
  • All US & JDM OBD1 (92-95) M/T prelude ecu's