12 00... Instructions on component testing

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 Wiring Diagrams.
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).
For further technical information, refer to Technical Data.