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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 operations 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
00576
Terminal 15
t  Open circuit
t  Open circuit in wiring
–  Eliminate open circuit in wiring
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
00625
Speed signal
t  No signal
GALA speed and GPS speed are constantly compared in the navigation unit. This fault is stored if GPS signal is > 40 km/h for 100 sec. but there is no GALA signal.
t  Open circuit in wiring
t  Dash panel insert defective
t  Navigation system with CD drive control unit -J401- defective
–  Eliminate open circuit in wiring
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Replace dash panel insert → Electrical system; Rep. Gr.90
–  Replace navigation system with CD drive control unit -J401- → Radio, telephone and navigation system; Rep. Gr.91
00668
Vehicle voltage terminal 30
t  Signal too low
t  Starter operated for more than 10 sec.
t  Battery flat/defective
t  Short circuit in vehicle electrical system
t  Battery voltage less than 9.5 V
t  Alternator defective
–  Evaluate measured value block 001 → Chapter
–  Repair short circuit in vehicle electrical system
–  Charge/replace battery → Electrical system; Rep. Gr.27
–  Check alternator → Electrical system; Rep. Gr.27
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
–  Rectify short circuit in wiring
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
00852
Front loudspeaker
t  Short circuit
t  Open circuit
t  Short to earth in wire to hands-free loudspeaker
t  Open circuit in wire to hands-free loudspeaker
t  Hands-free loudspeaker defective
–  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
00854
Output radio display dash panel insert
t  No communication
Whether or not a fault is still present following fault elimination cannot be detected during self-diagnosis. For this reason, operation of second display must always be checked and fault memory then interrogated again after eliminating a fault and erasing fault memory.
t  Open circuit in wiring
t  Dash panel insert defective
t  Navigation system with CD drive control unit -J401- defective
–  Eliminate open circuit in wiring
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Replace dash panel insert → Electrical system; Rep. Gr.90
–  Replace navigation system with CD drive control unit -J401- → Radio, telephone and navigation system; Rep. Gr.91
00862
Navigation aerial (GPS) - R50/R52
t  Open circuit
t  Short circuit
t  Open circuit in aerial wire
t  Short circuit in aerial wire
t  Navigation aerial (GPS) defective
–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Replace GPS aerial wire
–  Replace navigation aerial (GPS) → Radio, telephone and navigation system; Rep. Gr.91
01311
Data bus information
t  No communication
The navigation system with CD drive control unit -J401- contains the central unit and the navigation unit, which are interconnected via a CAN bus.
t  Internal short circuit or short to earth in bus wire between central unit and navigation unit in navigation system with CD drive control unit -J401-
–  Navigation system with CD drive control unit -J401- need not be replaced if system is still functional (control unit then switches to one-wire mode).
–  Navigation system with CD drive control unit -J401- must be replaced if system is no longer functional.
65535
Control unit
t  Defective
t  Navigation system with CD drive control unit -J401- defective
–  Replace navigation system with CD drive control unit -J401- → Radio, telephone and navigation system; Rep. Gr.91

   

Erasing fault memory > < Interrogating fault memory