Audi Workshop Service and Repair Manuals > A4 Mk1 > Power unit | Motronic Fuel Injection and ignition system (4-cyl.) 07.96ä | Self diagnosis, V.A.G Inspection Service | Self-diagnosis

Motronic Fuel Injection and ignition system (4-cyl.) 07.96ä

Self-diagnosis

Interrogating and erasing fault memory

‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select the engine electronics control unit with the "Address word" 01. When doing this the engine must be running at idle speed
(Connecting fault reader and selecting control unit for engine electronics .)

Only if engine does not start:

→ Indicated on display:

Rapid data transfer HELP

Select function XX

‒ Press keys 0 and 2 for "Interrogate fault memory" function and confirm entry with Q key.

→ The display shows the number of stored faults or "No fault recognised".

X faults detected

If no fault is stored:

If one or more faults are stored:

The stored faults are displayed and printed out one after another.
Then the display will show:

‒ Locate and eliminate faults listed on printout as per fault table => Page 01-8.
‒ Press keys 0 and 5 for the function "Erase fault memory" and confirm entry with Q key.

→ Indicated on display:

Rapid data transfer ⇒

Fault memory is erased.

Note:

If the ignition is switched off between interrogating the fault memory and erasing the fault memory, then the fault memory will not be erased.

→ Indicated on display:

Rapid data transfer HELP

Select function XX

‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.

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