Mercedes-Benz OM642 Diesel Active Tests Cut Injectors, Control Fans & More with YOUCANIC Scanner

About this video

Learn how to use the YOUCANIC full system scanner to perform bi-directional control tests on Mercedes-Benz diesel engines, including the popular OM642 V6. This step-by-step tutorial shows how to:

Cut off injectors one by one to pinpoint misfiring cylinders

Turn the engine cooling fan on and off for diagnostic or service purposes

Access and run a variety of active tests and actuator functions—the same way dealer-level tools do

This method works not just on OM642 engines but also on other Mercedes diesel engines such as OM651, OM603, and OM606 found in various models (E-Class, ML, GL, Sprinter, etc.).

If you’re troubleshooting rough idle, cooling issues, or injector problems—or just learning how to make the most of your YOUCANIC scanner—this video covers the essential active test functions.

🔧 Works on most Mercedes diesel models.
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