Jaltest (JDC604.9) | Mercury (MEFI 1-4) 10-pins OBD – 16-pins OBD2 Adapter Cable | Motorboat
Warranty handled directly by AsTools
Warranty handled directly by AsTools
We handle warranty cases ourselves, quickly and without the intervention of the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually help you immediately. Only in exceptional cases do we still send the product to the supplier.
2 years warranty on all products
2 years warranty on all products
All our products come with a 2-year factory warranty. This way, you are assured of long-lasting quality and service.
Easy returns via Returnless
Easy returns via Returnless
Returns are easy via Returnless. Register your return online and choose your own shipping method. Return costs are at your own expense.
Professional customer service
Professional customer service
Our experts are ready to help you quickly and professionally, both online and in our physical store. Questions? Feel free to contact us!
The Jaltest JDC604.9 is a diagnostic cable that establishes a stable connection between the 10-pin OBD diagnostic port of Mercury engines and a 16-pin OBD2 diagnostic device. This cable is specifically designed for reading engines equipped with a MEFI 1, MEFI 2, MEFI 3 or MEFI 4 engine management system, which are widely used in inboard and outboard engines.
By using this Adapter Cable, a technician can communicate with the engine control unit using the Jaltest Marine diagnostic interface. This provides access to diagnostic functions, such as reading and clearing fault codes, viewing live data from sensors, performing system checks, and calibrating components.
Application and functionality:
This cable is designed to establish a direct and stable communication link between the diagnostic interface and the engine management system of the vessel.
- Diagnostic connection: Forms the physical link between the specific 10-pin Mercury MEFI connector and a universal 16-pin OBD2 diagnostic interface.
- Access to engine data: Enables monitoring of real-time parameters, sensor values, and the system status of the MEFI system.
- Reading fault codes: Supports reading and clearing diagnostic trouble codes (DTCs) to identify and resolve malfunctions.
Compatible vehicles and applications:
The JDC604.9 Adapter Cable is developed for use on various inboard and outboard engines from Mercury Marine equipped with a MEFI 1, 2, 3, or 4 system.
Mercury:
- Inboard engines (Inboard): Engines equipped with a 10-pin MEFI 1, MEFI 2, MEFI 3, or MEFI 4 system.
- Outboard engines (Outboard): Engines equipped with a 10-pin MEFI 1, MEFI 2, MEFI 3, or MEFI 4 system.
Important: Before purchasing the product, always check the connection of your vehicle. This may vary by model and year of manufacture.
Package Contents:
- 1x Jaltest (JDC604.9) | Mercury (MEFI 1-4) 10-pin OBD – 16-pin OBD2 Adapter Cable | Motorboat
Technical specifications:
| Product brand | Jaltest |
| Product model | JDC604.9 |
| Vehicle side connection | Mercury 10-pin (MEFI 1-4) |
| Adapter side connection | 16-pin OBD2 |

To ensure that you always have access to the latest updates and software for your Jaltest device, it is important that you register the correct distributor.
Only the registered distributor can perform new software and updates. When you appoint us as your distributor, we can take care of this for you and guarantee that your device remains up-to-date without any issues.
How does it work?
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Download and fill in the change form
You can find the form as a PDF file here. -
Send the completed form to us
This can easily be done by email to support@astools.eu. -
We take care of the rest
With the form, we at Jaltest can submit the change and officially register you as our customer.






