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 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).
• For further technical information, refer to Technical Data.