A technical manual for a car repair is open on a desk, with a tablet displaying a digital version of the manual on the left side. The manual is titled 'HELICROLL AUTOMOTIVE DIESEL OXYGEN SENSOR' and includes detailed diagrams and instructions for diagnosing and repairing diesel engine oxygen sensors. The manual is copyrighted by 'SAE J1939' and is part of the 'SAE J1939 TRUCK DIESEL ENGINE DIAGNOSTICS' series.