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Erasing fault memory > < Interrogating fault memory

A2

Fault table
Fault table
  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.
t  On eliminating open circuit in wiring in the event of a data bus fault, make sure the two data bus wires of the relevant CAN bus system form a twisted pair so as to avoid interference.
   
Output on printer of -V.A.G 1551-Possible cause of troubleFault remedy
00003
Control unit
t  Defective
t  Telephone transmitter and receiver unit -R36- defective
–  Replace telephone transmitter and receiver unit -R36- → Radio, telephone and navigation system; Rep. Gr.91
00469
Display data bus in one-wire mode
t  Electrical fault in circuit
t  CAN bus fault
t  Open circuit in wiring
t  Wiring damage
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
00851
Loudspeaker
This fault is stored if a fault occurs during final control diagnosis (loudspeaker).
t  Mutual short circuit in wires to hands-free loudspeaker
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Replace hands-free loudspeaker → Radio, telephone and navigation system; Rep. Gr.91
01300
Nav. with CD drive control unit -J401-
t  No communication
t  CAN bus fault
t  Open circuit in wiring
t  Wiring damage
t  Navigation system with CD drive control unit -J401- defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Read out fault memory in navigation system with CD drive control unit -J401- → Chapter
–  Replace navigation system with CD drive control unit -J401- → Radio, telephone and navigation system; Rep. Gr.91
01304
Radio -R-
t  No communication
t  CAN bus fault
t  Open circuit in wiring
t  Open circuit in radio -R- power supply
t  Radio -R- defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Use current flow diagram to check radio -R- power supply
–  Read out radio -R- fault memory → Chapter
–  Replace radio -R- → Radio, telephone and navigation system; Rep. Gr.91
01305
Data bus display
t  Defective
t  CAN bus fault
t  Open circuit in wiring
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
01317
Control unit in dash panel insert -J285-
t  No communication
t  CAN bus fault
t  Open circuit in wiring
t  Dash panel insert defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Read out fault memory in dash panel insert → Electrical system, self-diagnosis; Rep. Gr.01
–  Replace dash panel insert → Electrical system; Rep. Gr.90
01326
Multi-func. steering wheel ctrl. unit -J453-
t  No communication
t  CAN bus fault
t  Open circuit in wiring
t  Multi-function steering wheel control unit -J453- defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Read out fault memory in multi-function steering wheel control unit -J453- → Chapter
–  Replace multi-function steering wheel control unit -J453- → Radio, telephone and navigation system; Rep. Gr.91
01522
Telephone handset -R37-
t  No communication
t  Open circuit in wiring
t  Telephone handset -R37- defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Replace telephone handset -R37- → Radio, telephone and navigation system; Rep. Gr.91
01523
Telephone microphone -R38-
t  Open circuit/short to positive
t  Short to earth
t  Open circuit in wiring
t  Short circuit
t  Telephone microphone -R38- defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Replace telephone microphone -R38- → Radio, telephone and navigation system; Rep. Gr.91
01524
Telephone aerial -R65-
t  No signal
t  Open circuit in aerial wire
t  Short circuit in aerial wire
t  Telephone aerial -R65- defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Replace aerial wire of telephone aerial -R65- → Radio, telephone and navigation system; Rep. Gr.91
–  Replace telephone aerial -R65- → Radio, telephone and navigation system; Rep. Gr.91

   

Erasing fault memory > < Interrogating fault memory