Jaltest (JDCM850) | Cummins (ECU) 4+50-pins – 16-pins OBD2 Adapter Cable | Commercial Vehicle
Warranty directly via AsTools
Warranty directly via AsTools
We handle warranty cases ourselves, quickly and without involving the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually assist 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 ensures you long-lasting quality and service.
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Easy returns
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Professional customer service
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The Jaltest JDCM850 Cummins 4+50-pin to 16-pin OBD2 Adapter cable is a specific diagnostic cable designed for direct communication with the Cummins CM850 Engine Control Module (ECM). This Adapter allows diagnostic technicians to read and configure the engine control unit of commercial vehicles outside the standard vehicle wiring. The cable features a 16-pin OBD2 connector on the interface side and a model-specific 4+50-pin connector that connects directly to the pins of the Cummins ECU. This type of connection is mainly used for bench-testing, flashing components, or isolating network faults within the CAN bus network of the vehicle.
When used, this insulation harness acts as a physical bridge between the diagnostic interface and the disconnected engine control unit. By connecting the ECU directly, the technician bypasses the internal wiring harness of the truck or machine, immediately ruling out communication issues caused by cable breaks or short circuits in the chassis. The cable supplies the necessary power and ground connections directly to the correct pins of the ECM, while the data lines transmit the diagnostic signal unhindered. This ensures stable data transfer during critical operations such as software updates and parameterization of a disassembled module.
ADVANTAGES
KEY POINTS
Applications and functionalities
This specific adapter cable offers various technical applications for diagnosing and programming Cummins engine management systems outside the vehicle's standard infrastructure.
- Fault diagnosis via insulation: Connects the diagnostic interface directly to the engine control unit to rule out communication errors or power loss caused by a faulty wiring harness in the vehicle.
- Bench-testing functionality: Allows a removed ECU to be powered on a workbench at the correct voltage to read current fault codes or verify repairs.
- Software and calibration updates: Provides an uninterrupted data connection required for safely writing new control software or calibration data to the module's flash memory chip.
Special features and capabilities
The JDCM850 is technically designed to safely translate the vehicle manufacturer's complex system into a workable diagnostic connection.
- Integrated pin routing (Insulation Harness): The cable accurately distributes the complex 4+50-pin layout of the Cummins ECU to the correct communication, power, and ground pins on the diagnostic equipment.
- OBD2 standardization: Converts the model-specific control unit connection to a standardized J1962 16-pin OBD2 port, enabling seamless connection with the Jaltest Link V9 (or similar hardware).
Package Contents
- 1x Jaltest JDCM850 Cummins CM850 Insulation Harness
Technical specifications
| Specification | Description |
|---|---|
| Product brand | Jaltest |
| Product model | JDCM850 |
| Cable type | Insulation Harness / Direct ECU cable |
| Vehicle side connection | Cummins 4+50-pin connector |
| Interface side connection | 16-pin OBD2 (J1962 female) |
| ECU compatibility | Cummins ECM CM850 |
| Vehicle application | Commercial vehicles and heavy equipment |
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.
