Home » OBD2B Auto to OBD1 Auto Dual Adapter Harness
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OBD2B Auto to OBD1 Auto Dual Adapter Harness

Only 3 left in Stock
$249.00 USD

This harness is designed to allow tuning of OBD2B automatic transmission vehicles.  Many OBD2B vehicle PCM's control the engine and the auto transmission from one unit.  This dual adapter harness will split these signals so that an OBD1 ECU can be used to run the engine while the factory OBD2B PCM will handle the transmission functions.  This will allow you to install one of our OBD1 AUTO ECU packages to control and tune the engine, while your factory ECU/PCM continues to control the automatic transmission. 

Notes:

With this harness installed, the OBD1 ECU will control the engine only.  The check engine light (MIL) on the dash will illuminate if there are any trouble codes with the OBD1 ECU.  You will jump the service check connector to flash codes on the light on the dash, or use the tuning system (if present) to datalog and read these codes.

With this harness installed, the factory OBD2 ECU/PCM will control the automatic transmission.  The check engine light on the dash will NOT illuminate for any codes on the factory ECU/PCM.  If you need to read codes from the factory OBD2 ECU/PCM, you will use an OBD2 scan tool to read through the factory OBD2 diagnostic port.  The factory OBD2 ECU/PCM will always have some codes present.  This is because several of the signals that would normally go to the ECU and now being redirected to the OBD1 ECU instead.  This is normal, and will not affect functionality.

Fits:

  • 98-01 Honda CRV with automatic transmission.  Overdrive is functional and works properly on 99-01 CRV's that have overdrive.

What ECU do I use? 

This harness is designed to use our S300 AUTO ECU package: OBD1 Hondata S300 AUTO ECU Package

What Transmission control unit do I use?

The factory OBD2 ECU/PCM will remain in place and will control your auto transmission.

How difficult is the installation?

Installation is fairly simple.  Unplug your factory OBD2 PCM and plug this harness into your factory ECU/PCM plugs.  Plug in the three new OBD1 ECU connectors to your new OBD1 ECU.  Plug the four remaining OBD2 ECU plugs from the new harness into your factory ECU/PCM.

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E
Evan

Great product and fast shipping. Only wish it came with a sticker. But oh well.

All products sold by HA Motorsports include a no hassle 1 year VIP warranty against ANY manufacturing defects. We are proud to honor this warranty as we feel 100% confident in our products to perform flawlessly as intended and your complete satisfaction. Upon the occasion that a product of ours fails at any time within 1 year of purchase due to any manufacturing defects, your product will need to be returned to us for inspection to determine the cause of the failure and inspection for repair or replacement. Your 100% satisfaction is our goal and if you are not completely happy we'd like every chance to make it right.

What is covered under warranty:

  • ECU board failure due to faulty ECU components (ie: injector driver fails, CPU processor fails, specific ECU circuit does not operate as intended, poor soldering, etc.)
  • ECU component/hardware failure due to faulty manufacturing.
  • Wire harness failure due to incorrect construction.
  • Product failure due to a manufacturing or assembly problem.
  • Outside company products. We will handle the hassle of shipping your product back to the manufacturer for warranty processing. Let us replace your product for you and we will deal with the warranty process with the manufacturer later.

What is NOT covered under warranty:

  • ECU failure due to improper vehicle wiring (ie: ECU component fries due to sensors being connected incorrectly, low resistance fuel injectors being used without a resistor box, ROM chip being installed backwards by user, customer attempts to modify ECU in ANY way other than intended, etc.)
  • Product being used in a way other than the intended use.
  • Rear "warranty void if removed" sticker on ECU has been removed or altered.
  • Failed, shorted, or corroded ECU board due to water damage.
  • Any and all outside labor charges associated with removing and replacing product or diagnosing product failure.
  • Wire harness failure due to improper use or rough handling.
  • Cosmetic variances from manufacturing (ie: ECU lid has variation in powder coat texture or color within acceptable limits, wire harness color variations within acceptable limits).

How the warranty process works:

If you've determined that a product has failed due to a manufacturing defect, please contact us via email at sales@hamotorsports.com to review the symptoms you are experiencing to allow us to assist you with troubleshooting before shipping your product back to us for warranty. Many times, we can help you with the problem and determine what is being done incorrectly or how to configure the product properly to restore correct operation. If after we discuss the issues you are experiencing we determine that your product may need warranty replacement or inspection we will instruct you how to return it to us. Please note that we test EVERY ECU, EVERY ECU package, and wire harness components on our state-of-the-art testing equipment for complete proper operation before packaging and shipping to customers. PLEASE verify ALL wiring, installation, software settings, etc. are correct BEFORE contacting us for warranty repair/replacement.