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.
Check DTC memory
1999 Audi A8 BaseSECTION Check DTC memory
NOTE:
- Determine test preconditions. See TEST REQUIREMENTS .
- Connect Scan tool V.A.G 1551 and select "Brake electronics" with address word 03. See VAG1551 SCAN TOOL (ST), CONNECTING AND ENTERING ADDRESS WORD .
- Check control module version (see CHECK CONTROL MODULE VERSION ) and press --> button.
- Press buttons -0- and -2- for "Check DTC memory" function and press -Q- button to confirm entry.
- Each malfunction is assigned a 5-digit DTC. It is listed in the left-hand column of the DTC table. The message identifying the malfunction and the DTC will be printed out on the printer of Scan tool V.A.G 1551 if the Print button is pressed. The DTC does not appear on the display of V.A.G 1551.
- The content of the DTC memory is retained until it is erased. See ERASE DTC MEMORY .
- Sporadic DTCs (see FUNCTION ), are additionally identified as such with "ISP" appearing on the right of the display.
- Static DTCs which cannot be detected when the vehicle is stationary are also identified with "ISP" after the ignition has been switched off and then on again.
- The following table includes all the DTCs which can be detected by the ABS Control Module (w/EDL) -J104- and displayed and printed out by V.A.G 1551. Malfunctions are listed according to DTCs.
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.