12 00... Instructions on component testing

WARNING: This page is about a different variant/trim than selected.

NOTE:

During all inspections and work on engine electrics and electronics, always observe safety regulations and accident prevention specifications.
Always disconnect connectors of control units or components before checking electric wires.

Testing Aids:

Schematics, refer to Diagnosis Information System (DIS).
Only ever use test lines, adapters, terminals and test tips manufactured by specialists, refer to Diagnosis Information System, Repair Manual.
The inspection values for component testing are located in the Diagnosis Information System (DIS).