Effect in the case of bus faults
If individual bus signals fail that are not stored in the fault memory
Possible fault pattern or perception on failure of the corresponding bus signal |
Faulty or missing signal |
Transmitter control module |
|---|---|---|
Terminal 15 not detected |
Status_Klemme_15 |
CAS |
Substitute program (electronic emergency mode) no gear can be engaged |
Drehzahl_Motor |
DME |
Substitute program (electronic emergency mode) |
Alive_Drehmoment_DME |
DME/ |
Substitute program (electronic emergency mode) |
Checksumme_Drehmoment_DME |
DME |
Substitute program (electronic emergency mode) |
Drehmoment_Ist |
DME |
Substitute program (electronic emergency mode) |
Drehzahl_Motor_Fehler |
DME |
Unwanted gear changes |
Luftdruck_Motor |
DME |
No gear can be engaged |
Status_Kontakt_Bremspedal_DME1 |
DME |
Substitute gear shift program |
Status_Regelung_Geschwindigkeit |
DME |
Forced to stay in current gear shift program |
Status_Schalter_Warmlauf |
DME |
Incorrect gear shift program |
Winkel_Fahrpedal |
DME |
Vehicle rolls back unexpectedly on uphill gradient |
Brake pressure |
DSC |
Unwanted gear changes |
Anforderung_Schaltbeeinflussung |
DSC |
Corners and gradients not detected |
Beschleunigung_Fahrzeug_Längs_DSC |
DSC |
Corners and gradients not detected |
Beschleunigung_Fahrzeug_Quer_DSC |
DSC |
Corners not detected/no L-R speed delta/no gear can be engaged |
Geschwindigkeit_Rad_HL |
DSC |
Corners not detected/no L-R speed delta/no gear can be engaged |
Geschwindigkeit_Rad_HR |
DSC |
Unwanted gear changes (gear shift intervention) |
Geschwindigkeit_Rad_VL |
DSC |
Unwanted gear changes (gear shift intervention) |
Geschwindigkeit_Rad_VR |
DSC |
No gear can be engaged |
Status_Kontakt_Bremspedal |
DSC |
Corners not detected |
Winkelgeschwindigkeit_Gier_DSC |
DSC |
Sports program not possible |
Bedienung_Getriebewahltaster_Sport |
SZM |
|
|
|
ACC not functioning/deactivated |
Getriebestrang_Verstärkung |
EGS |
ACC not functioning/deactivated |
Status_Gang_Getriebe |
EGS |
ACC not functioning/deactivated |
Steuerung_Anzeige_Gang_Getriebe |
EGS |
ACC not functioning/deactivated |
Steuerung_Anzeige_Störung_Getriebe |
EGS |
MIL lamp activation, relevant OBD fault |
Status_OBD_Fehler_Getriebe |
EGS |
MIL lamp activation, relevant OBD fault |
Status_OBD_Getriebe |
EGS |
1. Torque intervention is deactivated. 2. ACC and DSC deactivation. 3. Consequence: EGS switches to emergency mode |
Alive_Drehmoment_EGS |
EGS |
EGS deactivated, consequence: Emergency operation |
Drehmoment_SOLL_EGS |
EGS |
EGS deactivated, consequence: Emergency operation |
Checksumme_Drehmoment_EGS |
EGS |
EGS deactivated, consequence: Emergency operation |
Drehmoment_SOLL_Verstellbereich_Positiv_EGS |
EGS |
Transmission emergency program |
Status_Begrenzung_Anfahrmoment |
EGS |
Torque adjustment not carried out |
Status_Drehmoment_Soll_EGS |
EGS |
No cruise-control system, no comfort start, starting capability endangered |
Status_Gang_Getriebe |
EGS |
DSC warning light is activated / DSC not active / ABS OK |
Status_Gang_Getriebe |
EGS |
DSC and ACC inactive/ABS OK |
Drehzahl_Getriebe_Abtrieb |
EGS |
No reversing light |
Status_Gang_Getriebe |
EGS |
PDC not activated by reverse gear, only by button |
Status_Gang_Getriebe |
EGS |
Abbreviations |
Full expression |
ACC |
Active Cruise Control |
CAS |
Car Access System |
DSC |
Dynamic Stability Control |
EGS |
Electronic transmission control |
SZM |
Center Console Switch Center |
PDC |
Park distance control |