Checking volume controlling valve in ATF pump

WARNING: This page is about a different car, the 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Volume Controlling Valve In ATF Pump

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check volume controlling valve as follows:

Move valve piston against spring pressure.

Valve piston must move freely in both directions of movement - arrow -.
Valve must not have grooves.
No shavings must be jammed in opening - 1 -.

NOTE:

If valve piston is stuck or opening - 1 - is plugged, there will possibly be no actuation.