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3.4.2.2 Fault pattern

The "Fault pattern" tab can be used to select fault patterns from a functional structure on many

levels.

They supplement the read-in fault memory entries and are taken into account in test plan

calculation. The tab is not active unless the fault memories of the identified vehicle are being read

out. You should select the fault patterns independently of the customer's complaints about the

vehicle. Otherwise, only the saved faults will be taken into account when the test plan is created.

Especially for complaints apart from the vehicle's electric system, the selection of fault patterns is

especially important for assuring a successful diagnosis.

Select "Activities" -> "Guided troubleshooting" -> "Fault pattern" in the navigation area.

In the left-hand section of the content range, you can select the fault pattern from a hierarchical

structure: start with the uppermost, most general level and work your way down to an exact

description of the fault pattern. On the right side of the mask, the path through the selection

levels is logged.

Define the fault pattern as precisely as possible; otherwise, the test plan (Chapter 3.5.2)

generates an unnecessarily high number of test suggestions.

Fig. 3.28 "Fault pattern" tab

The following buttons are available in the action line:

◊ Undo all: deletes the existing selection and returns to the uppermost level.

◊ Undo: undoes the last selected step.

◊ Accept fault pattern: The previously selected symptom path (at least one level) is saved

as a basis for subsequently calculating the test plan. The tab then returns as the "Undo all"

button to the uppermost selection level. The selected fault pattern is then saved when you

quit the

"Fault pattern" tab.

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