9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT) (2003)
actuators. Bus communication may be regarded as internal control module communication.
This means that an overall view of the car is essential when carrying out fault diagnosis. A malfunction need not necessarily be caused by a fault in the
system where it appears but may very well be caused by a defective sensor in another system.