Diagnosis strategy

The diagnosis strategy has remained unchanged. Diagnostic trouble codes from all control modules are read first and fault diagnosis is initiated with the DTC which has a symptom description similar to the customer complaint. The difference is that the diagnostic trouble codes from all control modules are always read in the diagnostic tool at the same time. The diagnostic trouble codes can be transferred to the WIS either with an RS 232 cable or manually. Two additional symbols have been added to the diagnostic trouble codes in order to allow for more precise identification of fault types.

In order to more easily find activations or read values used in fault diagnosis for a specific diagnostic trouble code, select "Diagnostics data, diagnostic trouble codes" in order to immediately see values used in WIS fault diagnosis.