LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 2004 >> V40 LSE >> Repair and Diagnosis >> Electrical >> Body Electrical >> Central Electronic Module (CEM) - Design And Function >> Central Electronic Module (CEM) (2000-2004) >> Diagnostic functions >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic functions: Notes

The control module has a built-in diagnostic system, the Volvo on-board diagnostic (OBD) system. This system continuously monitors itself and the input and output signals.

scientia non olet · About LEMON Manuals