General Information

NOTES
- Relevant safety codes and accident prevention regulations must be observed when carrying out tests and work on the engine electrical and electronic systems.


CAUTION! Dangerous high voltage in the primary and secondary circuit of the ignition system.


IMPORTANT!: Wherever possible, the battery should not be disconnected otherwise the defect codes stored in all the control units will be deleted.
Disconnect control units from the wire harness only when the ignition is switched off.
Conduct wire tests only with the control unit or component connectors disconnected.


Use only suitable test leads, terminals and probe tips.

Overview of the Defect Codes and Component Tests