Audi A4. Body repair manual - part 52
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
- Switch ignition on.
- Switch printer on by pressing PRINT button
(indicator lamp in button lights up).
- Press button -1- to select "Rapid data transfer"
operating mode 1.
Rapid data transfer
HELP
Indicated on display
Insert address word XX
Address word for radio: 56
- Press buttons -5- and -6- to insert "Radio" address word 56.
Rapid data transfer
Q
Indicated on display
56 - Radio
- Press -Q- button to confirm input.
Note:
While the On Board Diagnostic (OBD) program is running "DIAG" will
appear on the radio unit display.
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
4B0035186A
Radio
D01
Indicated on display (after about 5 seconds):
Coding 00017
WSC 06812
4B0035186A: Part No. for radio ( parts catalog)
Radio: component designation
D01: software version installed in radio
Coding 00017: radio coding
WSC 06812: dealership number
Note:
Check coding against coding table page 01-22 .
- Press button.
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
Rapid data transfer
HELP
- If display shows one of the following messages, carry out
Control module does not answer
troubleshooting procedure as described in troubleshooting program for
diagnostic wiring.
Electrical Wiring Diagrams, Troubleshooting & Component Locations
Rapid data transfer
HELP
Error in communication link
Rapid data transfer
HELP
K wire not switching to Ground
Rapid data transfer
HELP
K wire not switching to B+
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
Rapid data transfer
HELP
Indicated on display
Select function XX
After the HELP button is pressed, a list of the possible functions is printed
out.
- Press button to advance through program sequence.
On Board Diagnostic (OBD) functions
The following functions are possible:
02 - Check DTC Memory page 01-7
03 - Output Diagnostic Test Mode (DTM) page 01-14
05 - Erase DTC Memory page 01-16
06 - End Output page 01-18
07 - Code Control Module page 01-19
08 - Read Measuring Value Block page 01-25
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
Check DTC Memory (scan tool function
02)
Note:
The displayed malfunction is only updated when
the On Board Diagnostic (OBD) program is
initiated or when "Erase DTC Memory" function
05 is used.
- Switch on printer by pressing PRINT button
(indicator lamp in button lights up).
Rapid data transfer
HELP
Indicated on display
Select function XX
- Press buttons -0- and -2- to select "Check DTC Memory" function 02.
Rapid data transfer
Q
Indicated on display
02 - Check DTC Memory
- Press -Q- button to confirm input.
X DTC recognized!
Indicated on display (the number of stored DTCs)
Stored DTCs are displayed and printed out one after the other.
- Check printout against DTC table and repair all malfunctions as
necessary page 01-9 .
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
No DTC recognized!
If "No DTC recognized" is displayed the program will return to the starting
point ("Select function XX" prompt) after the button is pressed.
Rapid data transfer
HELP
Indicated on display
Select function XX
If anything else is displayed:
Scan Tool operating instructions
- End output (function 06) page 01-18 .
- Switch ignition off and disconnect connections from Data Link
Connector (DLC).
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
Diagnostic Trouble Code (DTC) table for radio system
Notes:
The following table lists all the malfunctions (stored as Diagnostic Trouble Codes, or DTCs) that can be recognized by the
radio system and printed out by the VAG1551 Scan Tool (ST). The DTCs are listed in order according to their 5-digit
numbers.
The DTCs only appear on the print-out from the scan tool.
Before replacing a component shown as faulty, check the wiring and connections to the component as well as Ground
(GND) connections according to the wiring diagram.
When a repair has been carried out, the DTC memory must always be checked again and then erased using the
VAG1551 scan tool.
Static and sporadic malfunctions are stored as DTCs in the DTC memory. If a malfunction occurs and persists for at least
2 seconds, it is identified as a static malfunction. If the malfunction does not occur again it is registered as a sporadic
malfunction and "/SP" will appear at the right of the display.
When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will
only be registered as static malfunctions if they still occur after testing.
Sporadic malfunctions which no longer occur after 50 driving cycles (ignition on for at least 5 minutes, road speed of more
than 30 km/h or 19 mph) are erased automatically.
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
DTC
Possible cause
Corrective action
VAG1551 Scan Tool display
00668
Battery Positive Voltage (B+)
Battery discharged or faulty
- Charge or replace battery.
Term. 30
Short circuit in vehicle electrical
- Repair short circuit in vehicle electrical system.
Signal too low
system
00849
S Contact on Ignition Starter
Ignition/starter switch -D- faulty
- Replace ignition/starter switch -D-.
Switch
Open circuit in wiring
- Trace malfunction using wiring diagram.
Open circuit
Electrical Wiring Diagrams, Troubleshooting &
Component Locations
00850
Control Output Active, Radio
Wiring damaged
- Trace malfunction using wiring diagram.
Amplifier
Active amplifier faulty
Electrical Wiring Diagrams, Troubleshooting &
Short circuit to Ground
Component Locations
- Replace active amplifier.
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
DTC
Possible cause
Corrective action
VAG1551 Scan Tool
display
00852
Loudspeaker front
Wiring damaged
- Trace malfunction using wiring diagram.
Short circuit
Front loudspeaker
Electrical Wiring Diagrams, Troubleshooting & Component
faulty
Locations
Open circuit
Open circuit in wiring
- Replace faulty loudspeaker.
- Repair open circuit.
00853
Loudspeaker rear
Wiring damaged
- Trace malfunction using wiring diagram.
Short circuit
Rear loudspeaker
Electrical Wiring Diagrams, Troubleshooting & Component
faulty
Locations
Open circuit
Open circuit in wiring
- Replace faulty loudspeaker.
- Repair open circuit.
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
DTC
Possible cause
Corrective action
VAG1551 Scan Tool
display
00854
Output Radio Display
Open circuit in wiring
- Trace malfunction using wiring diagram.
Dash Panel Insert
Instrument cluster
Electrical Wiring Diagrams, Troubleshooting &
No signal
combination processor faulty
Component Locations
- Replace faulty instrument cluster.
Repair Manual, Electrical Equipment, Repair Group 90;
removing and installing instrument cluster
00855
Connection to CD
Open circuit in wiring
- Trace malfunction using wiring diagram.
Changer
Voltage supply to CD changer
Electrical Wiring Diagrams, Troubleshooting &
No signal
unit interrupted
Component Locations
CD changer unit -R41- faulty
- Check voltage supply to CD changer unit using wiring
diagram.
- Replace CD changer unit.
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
DTC
Possible cause
Corrective action
VAG1551 Scan Tool
display
00856
Radio Antenna
Open circuit in wiring
- Trace malfunction using wiring diagram.
Short circuit
Short circuit in antenna wire
Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Open circuit
- Check antenna wire.
01044
Control Module incorrectly
Radio not coded to match
- Code radio according to vehicle.
coded
configuration in vehicle
65535
Control Module
Radio faulty
- Replace radio.
Malfunctioning
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
Output Diagnostic Test Mode (scan tool
function 03)
Notes:
The output Diagnostic Test Mode (DTM) may
only be carried out with the vehicle stationary
and the engine not running.
Any malfunctions identified by the output
Diagnostic Test Mode (DTM) must be traced
and eliminated.
The output DTM is used to test the loudspeaker
wiring and the secondary display.
Carrying out output DTM
- Press buttons -0- and -3- to select "Output
Diagnostic Test Mode" function 03.
Rapid data transfer
Q
Indicated on display
03 - Output Diagnostic Test Mode
- Press -Q- button to confirm input.
Output Diagnostic Test Mode
Indicated on display
Speaker
All loudspeakers will receive a brief electrical pulse (inaudible).
Radio, On Board Diagnostic (OBD) (m.y. 1998 [micro])
Note:
Any malfunctions (e.g. short circuits) that occur
will be recorded as DTCs in DTC memory.
- Press button.
Output Diagnostic Test Mode
Indicated on display
Outlet Radio display instrument panel insert
"DISPLAY ... TEST" will appear on the secondary display in the
instrument cluster.
- Press button.
Output Diagnostic Test Mode
Indicated on display
End
- Press button (returns scan tool to "Select function XX" prompt).
Rapid data transfer
HELP
Indicated on display
Select function XX