Volkswagen-Audi Vehicle Communication Software Manual [888kb ...

Operations
Identifying the Vehicle
3.1.1 Engine ID Codes
The vehicle identification process includes entering the test vehicle’s engine ID code. The exact
engine ID code selection is usually not required for vehicle communications, however, in order for
the scan tool to communicate with all installed systems, we recommend that you identify the
correct engine code. The scan tool has to match all possible control module identities with the
exact control module installed in the vehicle. In addition, the engine ID code is required to select
the correct OBD-II Readiness Monitor setting procedures. See the Volkswagen/Audi OBD-II
Readiness Charts for more information.
VW/Audi specific engine differences are determined by a three-digit engine ID code. In any
particular year, there could be multiple engine ID codes for any one engine. The engine codes
may represent different horsepower, torque rating or emission package.
Engine ID codes are stamped on the engine block in three-digit alpha characters followed by a
series of numbers (usually six), for example, “AEG 029452". If more than 999,999 engines with the
same engine code are produced, the first number is replaced by a letter. Newer models may also
have an adhesive label located on the timing belt cover. The engine ID code can be difficult to
locate on older engines with excessive oil and grease. Here are typical older model 4- and
6-cylinder locations:
• 4-cylinder engine codes and numbers are usually, stamped into the rear of the cylinder block
casting near the oil filter flange near the engine/transmission joint.
• 6-cylinder engine codes are usually located on the left side of the engine block below the
camshaft timing chain tensioner. The code numbers should be visible when looking down
between the throttle valve control module and the valve cover.
Note the following when looking for an engine ID code:
• Alternatively, look in the owners “maintenance” manual for an adhesive sticker.
• For most engines, the engine ID code is also included on the vehicle data plate, typically
located in the trunk near the spare tire. This may be the easiest way to find the engine code.
Table 3-1 contains engine ID code locations for Audi models.
Table 3-1 Volkswagen engine ID code locations (part 1 of 4)
Model Year Engine Code Location
Beetle
1999 and
later
1998–2002
2003
2004 and
later
1.8L
1.9L 4-cyl
2V TDI
2.0L 4-cyl
2V
1.8L
Turbo
1.9L TDI
APH, AWP, AWV: Near the engine/transmission joint. Also on a
sticker on the toothed belt guard.
ALH: Between the diesel injection pump and the exhaust manifold
on the engine block. Also on a sticker on the timing belt guard.
BBW, BDC: On the front of the engine near the engine/
transmission joint. Also on a sticker on the cylinder head cover and
vehicle data plate.
AWU: Unknown at this time.
BKF: The engine number can be found on the joint between
engine/gearbox.
BNU: The engine number can be found on the joint between
engine/gearbox.
BEW: The engine number can be found on the joint between
engine/gearbox.
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