Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTRADIO, STEREO, AND COMPACT DISCTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESOUTPUT DIAGNOSTIC TEST MODE (FUNCTION 03)
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Output Diagnostic Test Mode (Function 03)
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Output Diagnostic Test Mode (Function 03)
NOTE:
- 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.
Indicated on display
Rapid data transfer Q
03 - Output Diagnostic Test Mode
- Press -Q- button to confirm input.
Indicated on display
Output Diagnostic Test Mode ->
Speaker
All loudspeakers will receive a brief electrical pulse (inaudible).
NOTE: Any malfunctions (e.g. short circuits) that occur will be recorded as DTCs in DTC memory.
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Outlet Radio display instrument panel insert
"DISPLAY... TEST" will appear on the secondary display in the instrument cluster.
NOTE: For vehicles with navigation system: the display alternates in a 4-second cycle between normal and inverse representation.
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
End
- Press -> button (returns scan tool to "Select function XX" prompt).
Indicated on display
Rapid data transfer HELP
Select function XX
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.