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Final control diagnosis > < Interrogating fault memory

A3 Mk1

Fault table for multi-function steering wheel
Fault table for multi-function steering wheel
  Note!
t  The following table lists all faults which can be detected by the system and printed out on fault reader -V.A.G 1551- in ascending order of 5-digit fault codes.
t  Before replacing components found to be defective, use current flow diagram to check wiring and connectors to these components as well as earth connections.
t  On completion of repair work and after checking system operation, fault memory is always to be interrogated again and erased.
t  All static and sporadic faults are stored in the fault memory. Faults persisting for at least 2 seconds are identified as being static faults. If a fault is then no longer present, it is stored as being sporadic and “/SP” appears on the right of the display.
t  After switching on ignition, all faults present are set to sporadic and only stored as being static if they are still present after checking.
t  Sporadic faults which do not re-occur during 40 on/off cycles are erased.
   
Output on printer of
-V.A.G 1551-		Possible cause of troubleFault remedy
01044
Multi-function steering wheel control unit -J453-
t  Incorrectly encoded

t  Multi-function steering wheel control unit -J453- encoding does not correspond to equipment

–  Encode multi-function steering wheel control unit -J453- → Chapter
01302
Telematics control unit -J499-
t  No communication

t  CAN bus fault
t  Telematics control unit -J499- defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Read out telematics control unit -J499- fault memory → Chapter
–  Replace telematics control unit -J499- → Radio, telephone and navigation system; Rep. Gr.91
01304
Radio -R-
t  No communication

t  CAN bus fault
t  Radio -R- defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Read out radio -R- fault memory → Chapter
–  Replace radio -R- → Radio, telephone and navigation system; Rep. Gr.91
01426
Operating unit in steering wheel -E221-
t  No communication
t  Implausible signal

t  Open circuit in wiring - loss of link between control unit and steering wheel
t  Incomprehensible messages on data bus (control unit and steerig wheel electronics are linked via CAN bus)

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Check wiring between control unit and steering wheel
65535
Control unit
t  Defective

t  Control unit defective

–  Replace control unit → Radio, telephone and navigation system; Rep. Gr.91

   

Final control diagnosis > < Interrogating fault memory