Impact of bus faults
If individual bus signals fail that are not stored in the fault memory
Possible fault symptom or perception on failure of the corresponding bus signal |
Faulty or missing signal |
Transmitter control module |
|---|---|---|
No display for CC message + signal, driver acceptance |
Anzeige_Fahrerübernahme Anzeige_FA_Abstandswahl Anzeige_FA_Wunschgeschwindigkeit Anzeige_Objekt_Erfasst |
ACC module |
Scrolling of display not possible |
Bedienung_Lenkstocktaster |
SZL |
Engine speed is not displayed |
Drehzahl_Motor |
DME 1 |
Orange zone in display field for default value 5000 rpm not shown |
Drehzahl_Temperatur_Bereich_1 |
DME 1 |
Red zone in display field for default value 6000 rpm not shown |
Drehzahl_Temperatur_Bereich_2 |
DME 1 |
No display of turn-signal or hazard-warning flashing |
Status_Blinken |
LM |
No display of average consumption/FCI/range with display set to ”Zero” |
Einspritzmenge_Kraftstoff |
DME 1 |
No display of corresponding symbol |
Status_Blinken_Kombi |
LM |
No synchronization with SCSC direction-indicator frequency |
Status_Blinken_Stop |
LM |
No high beam display |
Status_Fernlicht/Lichthupe |
LM |
No cruise-control display where display in instrument cluster goes out |
Status_Geschwindigkeit_Regelung_Tempomat |
DME 1 |
Speed marks are not set with deactivation of cruise control + signal |
Geschwindigkeit_Regelung_Tempomat Geschwindigkeit_Tempomat_ Index_Nummer_1 Geschwindigkeit_Tempomat_ Index_Nummer_2 Geschwindigkeit_Tempomat_ Index_Nummer_3 Index_Nummer 2 |
DME 1 |
No display in instrument cluster |
Status, front fog lamps Status_Nebelschlußleuchte |
LM |
Set marks are not displayed |
Steuerung_Anzeige_Tempomat |
DME 1 |
No instrument-cluster illumination for default value maximum brightness |
Steuerung_Beleuchtung_Schalter |
LM |
No frequency of turn-signal display |
Takt_Blinken |
LM |
No speedo display with speedo at ”Zero” odom./tr.odom. freeze |
Distance |
DSC module |
No damping factor for display with incorrect outside temperature |
Status_Fahrzeug_Fahrzustand |
DSC module |
No damping factor for display with incorrect outside temperature |
Temperatur_Motor |
DME 1 |
Operation of on-board computer not possible |
Bedienung_Lenkstocktaster |
SZL |
No display of ACC, cruise control, NAVI, PreDriveCheck for instrument cluster remains dark, displayed again from ”engine running” |
Status_Klemme_15 |
CAS |
No FCI calculation, BC functions |
Status_Motor_Läuft |
DME 1 |
No active signal from ACC for CC message + ACC deactivation |
Alive_Zähler_ACC |
ACC module |
No active signal from ARS for CC message |
Alive_Zähler_ARS |
ARS module |
No active signal from DME for cruise-control deactivation |
Alive_Zähler_DME |
DME 1 |
No active signal from DSC for CC message |
Alive_Zähler_DSC |
DSC module |
No active signal from EDCK for CC message |
Alive_Zähler_EDCK |
EDCK module |
No active signal from EGS for CC message |
Alive_Zähler_EGS |
EGS module |
No active signal from EMF for CC message |
Alive_Zähler_EMF |
EMF module |
No active signal from SIM for CC message |
Alive_Zähler_Sicherheit |
SIM |
No plausibilisation of transmission faults for CC message + ACC deactivation -->driver acceptance |
Checksumme_ACC |
ACC module |
No display of ACC, cruise control, NAVI, PreDriveCheck for instrument cluster remains dark |
Status_Klemme_15 |
CAS |
(For US version only) Warning ”Key inserted” remains off |
Status_Schlüssel_Steckt |
CAS |
No light/consumer warning with no warning, danger-->battery flat |
Status_Standlicht |
LM |
No light/consumer warning with no warning, danger-->battery flat |
Status_Türkontakt_FAT |
CAS |
No lights OFF warning with no warning, message is reset after a defined time |
Status_Zentralverriegelung |
CAS |
Gear display arrows not flashing, no position indicator in locating light, gear display is dark. Current status of transmission |
Steuerung_Anzeige_Störung_Getriebe |
EGS module |
Engaged gear is not displayed. Gear / gear map is hidden. |
Steuerung_Anzeige_Gang_Getriebe |
EGS module |
No display of which arrow lights up. All arrows flashing + locating light on |
Steuerung_Anzeige_Pfeilschaltschema |
EGS module |
Shift request is not displayed. All arrows flashing + locating light on |
Steuerung_Anzeige_Pfeilschaltschema_Blinken |
EGS module |
R, N, D not displayed. R-N-D statically activated (locating light) |
Steuerung_Anzeige_Position_Getriebe |
EGS module |
Shift request is not displayed. R-N-D statically activated (locating light) |
Steuerung_Anzeige_Position_Getriebe_Blinken |
EGS module |
Gear display arrows not flashing, no position indicator in locating light, gear display is dark. No longer identifiable which drive position is current |
Steuerung_Anzeige_Störung_Getriebe |
EGS module |
No illumination of display with lights off |
Steuerung_Beleuchtung_Schalter |
LM |
No service-relevant entry in fault memory illumination of display with lights off |
ID2_RDA_Daten Kennung_RDA_daten Nutzdaten_RDA_Daten |
CAS |
Abbreviations |
Full expression |
KOMBI |
Instrument cluster |
ACC |
Active Cruise Control |
AHM |
Trailer Module |
ARS |
Dynamic Drive |
CAS |
Car Access System |
DME |
Digital Motor Electronics |
DSC |
Dynamic Stability Control |
EMF |
Parking brake |
EGS |
Electronic Transmission Control |
EDCK |
Electronic Damper Control Dynamic |
LM |
Light module |
SIM |
Safety Information Module |
SZL |
Steering column switch center |