With Manufacturer's Scan Tool (VAG)

CHECKING TROUBLE CODE MEMORY
- Connect VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter harness.
- Start engine and let idle.

If engine does not start:
^ Operate the starter for approx. six seconds. DO NOT switch the ignition off.

- Operate VAG 1551 Scan Tool according to information and instructions on the display.
- Press button -1- for "Rapid data transfer" operating mode.
- Press PRINT button to switch the printer on (indicator lamp in button lights up).
- Press buttons -0- and -1- to enter address word 01 for "Engine Electronics".
- Press -Q- button to confirm input.
- Press --> button.
- Press buttons -0- and -2- to select the "Check DTC Memory" function.
- Press -Q- button to confirm input.
- The number of stored Diagnostic Trouble Codes (DTCs) will be indicated or "No DTC recognized" will be displayed.

^ Indicated on display:

X DTC recognized
No DTC recognized.

NOTE: If anything else appears in the display, check the VAG 1551 Scan Tool operating instructions.

- If one or more DTCs are stored, they will be displayed and printed out in sequence.
- If no Diagnostic Trouble Code is recognized:

- Press --> button.

- If one or more DTCs are stored:

- Press buttons -0- and -5- to select the "Erase DTC Memory" function.
- Press -Q- button to confirm input.

^ Indicated on display:

Rapid data transfer -->
DTC Memory is erased.

NOTE: If the ignition was switched off between checking and erasing the DTC Memory, the DTC Memory will not be erased.

- Press --> button.

^ Indicated on display:

Rapid data transfer HELP
Select function XX.

- When DTC Memory is clear (No DTC recognized or DTC Memory is erased):

- Press buttons -0- and -6- to select the "End output" function.
- Press -Q- button to confirm input.
- In the Diagnostic Trouble Code (DTC) table, look up the Diagnostic Trouble Codes that are printed out, and repair. Testing and Inspection

NOTE: The DTC table lists DTCs in sequence according to the 5-digit code.

- Test-drive car for at least 10 minutes.
- The following requirements should be met while test driving:

^ Coolant temperature must be over 80°C (176°F) for at least 3 minutes.
^ At engine speed over 4600 rpm, briefly press accelerator pedal to the floor.
^ In 4th gear, starting from approx. 50 km/h (30 mph), accelerate for about 4 seconds with accelerator pedal pressed halfway down.

- Check and erase DTC Memory again.