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Final control diagnosis > < Interrogating fault memory

A3 Mk1

Radio system fault table
Radio system 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.
   
Output on printer of
-V.A.G 1551-		Possible cause of troubleFault remedy
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

–  Repair short circuit in vehicle electrical system
–  Check battery → Electrical system; Rep. Gr.27
–  Check alternator → Electrical system; Rep. Gr.27
00849
S-contact at
ignition/starter switch -D
t  Open circuit

t  Open circuit in wiring
t  Ignition/starter switch -D defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Replace ignition/starter switch -D → Electrical system; Rep. Gr.94
00850
Ctrl output active ampli. on radio
t  Short to earth

t  Wiring damage
t  Open circuit in wiring/short circuit
t  Amplifier defective
t  Amplifier and bass loudspeaker defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring/short circuit
–  Replace amplifier → Radio, telephone and navigation system; Rep. Gr.91
00852
Front loudspeaker
t  Short circuit
t  Open circuit

t  Wiring damage
t  Open circuit in wiring/short circuit
t  Front loudspeaker defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring/short circuit
–  Replace loudspeaker → Radio, telephone and navigation system; Rep. Gr.91
00853
Rear loudspeaker
t  Short circuit
t  Open circuit

t  Wiring damage
t  Open circuit in wiring/short circuit
t  Rear 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 loudspeaker → Radio, telephone and navigation system; Rep. Gr.91
00854
Output radio display dash panel insert
t  No communication → Note

t  Open circuit in wiring
t  Dash panel insert defective
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
–  Replace dash panel insert → Electrical system; Rep. Gr.90
–  Replace radio -R- → Radio, telephone and navigation system; Rep. Gr.91

1)  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.
   
Output on printer of
-V.A.G 1551-		Possible cause of troubleFault remedy
00855
Connection to CD changer
t  No communication

t  Open circuit in wiring
t  Open circuit in CD changer power supply
t  CD changer -R41- defective
t  Radio -R- defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Check wiring between CD changer and radio → Radio, telephone and navigation system; Rep. Gr.91
–  Use current flow diagram to check CD changer power supply → Current flow diagrams, Electrical fault finding and Fitting locations
–  Replace CD changer -R41- → Radio, telephone and navigation system; Rep. Gr.91
–  Replace radio -R- → Radio, telephone and navigation system; Rep. Gr.91
00856
Aerial on the radio
t  Short circuit
t  Open circuit

t  Wiring damage
t  Open circuit in wiring
t  Short circuit in aerial wire
t  Aerial wire disconnected

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring
–  Check aerial wire
–  Replace aerial → Radio, telephone and navigation system; Rep. Gr.91
00857
CD changer -R41-
t  No communication
t  Defective

t  Open circuit in wiring
t  Open circuit in CD changer power supply
t  CD changer -R41- defective
t  Radio defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Check wiring between CD changer and radio → Radio, telephone and navigation system; Rep. Gr.91
–  Use current flow diagram to check CD changer power supply
–  Replace CD changer -R41- → Radio, telephone and navigation system; Rep. Gr.91
–  Replace radio -R- → Radio, telephone and navigation system; Rep. Gr.91
00858
Connect. radio midrange outp., aerial amp.
t  Short circuit
t  Open circuit

t  Wiring damage
t  Open circuit in wiring/short circuit
t  Aerial selection control unit -J515- defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring/short circuit
–  Replace aerial selection control unit -J515- → Radio, telephone and navigation system; Rep. Gr.91
00878
Connections to FL loudspeakers
t  Short circuit
t  Open circuit

t  Wiring damage
t  Open circuit in wiring/short circuit
t  Front left loudspeaker defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring/short circuit
–  Replace front left loudspeaker → Radio, telephone and navigation system; Rep. Gr.91
00879
Connections to FR loudspeakers
t  Short circuit
t  Open circuit

t  Wiring damage
t  Open circuit in wiring/short circuit
t  Front right loudspeaker defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Eliminate open circuit in wiring/short circuit
–  Replace front right loudspeaker → Radio, telephone and navigation system; Rep. Gr.91
01044
Control unit
t  Incorrectly encoded

t  Radio not encoded to match configuration in vehicle

–  Encode radio accordingly → Chapter
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 control unit → Chapter
–  Replace navigation system with CD drive control unit -J401- → Radio, telephone and navigation system; Rep. Gr.91
01303
Telephone transmitter/receiver unit -R36-
t  No communication

t  CAN bus fault
t  Open circuit in wiring
t  Telephone transmitter and receiver unit -R36- 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 transmitter and receiver unit → Chapter
–  Replace telephone transmitter and receiver unit -R36- → 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 with display 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
02218
Satellite radio -R146-
t  No communication link on TP channel

t  Open circuit in wiring
t  Satellite radio -R146- not connected
t  Satellite radio -R146- defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Read out fault memory in satellite radio -R146-
–  Check satellite radio -R146-
02230
Digital radio (DAB) -R147-
t  No communication link on TP channel

t  Open circuit in wiring
t  Digital radio (DAB) -R147- not connected
t  Digital radio (DAB) -R147- defective

–  Fault-finding in line with current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
–  Read out digital radio (DAB) -R147- fault memory
–  Check digital radio (DAB) -R147-
65535
Control unit
t  Defective

t  Radio -R- defective

–  Replace radio -R- → Radio, telephone and navigation system; Rep. Gr.91

   

Final control diagnosis > < Interrogating fault memory