Reading Diagnostic Trouble Codes
DTC MEMORY, CHECKING AND ERASING- Connect VAG 1551 scan tool and operate until the display shows "Select function XX".
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -2- to select the "Check DTC Memory" function 02.
Indicated on display
Rapid data transfer Q
02 - Check DTC Memory
- Press -Q- button to confirm input.
The number of stored Diagnostic Trouble Codes (DTC) or "No DTC recognized" is shown on the display.
X DTC recognized
No DTC recognized
NOTE:
- If the printer is switched on, the stored malfunctions will be displayed and printed out in sequence.
- If the printer is switched off, the H button must be pressed to display the next malfunction.
- After the last malfunction is displayed, press the H button.
NOTE: If there is a complaint that is not recognized by the On Board Diagnostic (OBD), carry out additional troubleshooting.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -5- to select the "Erase DTC Memory" function 05.
Indicated on display
Rapid data transfer 0
05 - Erase DTC Memory
- Press -0- button to confirm input.
NOTE: Every time DTC memory is erased (both with function 05 and with address word 33, mode 4) the readiness code is erased.
If indicated on display
Caution
DTC Memory is not interrogated
If the ignition was switched off between checking and erasing DTC memory, then DTC memory is not erased.
- Comply with work sequence exactly, i.e. first check DTC memory.
Indicated on display
Rapid data transfer
DTC Memory is erased
- Press button.
Indicated on display
Rapid data transfer HELP
Select function XX
- Repair malfunctions printed out according to Diagnostic Trouble Code (DTC) table, Testing and Inspection
- After repairing the malfunctions, check DTC memory again to erase any malfunctions that may have been stored (e.g. by disconnecting connectors).
- Stop engine (switch ignition off) and start again.
- Test drive for at least 10 minutes.
- Carry out Automatic Test Sequence by inserting address word 00.
NOTE: After address word 00 is inserted, the DTC memory of all systems with rapid data transfer is checked.