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SKU:
NLT1Q02733
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OBD2A-to-OBD1 ECU Jumper Harness for 1996-1998 Honda Civic & Related Models
$30.99
In Stock
$30.99
Sale price
$30.99
Regular price
This OBD2A-to-OBD1 ECU jumper harness lets compatible manual-transmission Honda and Acura vehicles use an OBD1-style engine computer without cutting the factory harness.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Honda Civic / Civic Del Sol manual transmission with OBD2A harness (1996-1998)
- Acura Integra manual transmission with OBD2A harness (1996-1999)
- Honda Accord manual transmission with OBD2A harness (1996-1997)
- Honda Prelude manual transmission with compatible OBD2A harness (1996-2001; verify connector generation)
Product Overview
Engine swaps, tunable ECU conversions, and motorsport builds often pair a 1996-era OBD2A chassis harness with an earlier OBD1 ECU. This adapter translates the connector layout between the two systems while leaving the vehicle-side harness intact.
It does not convert OBD2B, automatic-transmission logic, or an incompatible ECU calibration. Confirm the chassis connector generation, transmission, ECU pinout, engine-management needs, emissions rules, and any separate distributor or sensor wiring before installation.
Key Features & Performance
- OBD2A vehicle-harness plugs to OBD1 ECU plugs
- Plug-in conversion without cutting the main chassis harness
- Useful for compatible tuning and engine-swap projects
- Copper wiring and molded connectors for repeated service
- Designed for manual-transmission applications
Common Uses
- Installing an OBD1 ECU in an OBD2A chassis
- Supporting a compatible engine swap
- Adding an OBD1 tuning platform to a manual car
- Avoiding permanent cuts to the factory ECU connectors
Technical Specifications
- Product Type: ECU jumper harness
- Vehicle Side: OBD2A
- ECU Side: OBD1
- Transmission: Manual only
- Condition: New
- Use: Engine-management conversion
Installation & Fitment
- Disconnect battery power before unplugging the ECU
- Verify the chassis is OBD2A—not OBD2B—and the ECU is OBD1
- Compare pinout requirements for engine, distributor, injectors, sensors, and emissions equipment
- Seat connectors fully and secure the adapter away from water and sharp brackets
- Check for diagnostic codes and verify safe fuel and ignition calibration before driving
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Confirm OBD2A chassis connectors, OBD1 ECU plugs, manual transmission, vehicle year, ECU pinout, engine/sensor wiring, and local emissions requirements. Model year, production date, serial number, trim, engine, installed options, and previous repairs can affect fitment.
Frequently Asked Questions
Q: Will this work with an automatic transmission? A: This adapter is intended for manual-transmission applications; automatic control circuits and ECUs require different provisions.
Q: Does the harness tune the engine by itself? A: No. It only adapts connectors; the ECU calibration must be correct for the engine, injectors, sensors, and modifications.
Q: What should I compare before ordering? A: Confirm OBD2A chassis connectors, OBD1 ECU plugs, manual transmission, vehicle year, ECU pinout, engine/sensor wiring, and local emissions requirements.
Q: Is this supplied by the original equipment manufacturer? A: No. This is a new aftermarket part. Brand names and reference numbers identify fitment only.
Package note: One OBD2A-to-OBD1 ECU adapter harness is included; ECU, tuning hardware, distributor adapters, and conversion instructions are not included unless shown.
Part Summary
keywords: OBD2A to OBD1 jumper harness, 1996-1998 Civic ECU adapter, Honda manual ECU conversion, Integra OBD1 tuning harness, Honda engine swap jumper, OBD2A chassis OBD1 computer
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.