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May 10, 2013 Service bulletin

When diagnosing a generator charging concern, it is recommended to verify operation of the one way clutch...

Volkswagen technical service bulletin TT271301 for 2005-2013 Volkswagen Jetta, 2005-2013 Volkswagen Passat and 2005-2013 Volkswagen Beetle and others.

Bulletin number
TT271301
Component
Electrical system
Summary
When diagnosing a generator charging concern, it is recommended to verify operation of the one way clutch located in the generator pulley (if equipped) before replacing generator assembly. To check the one way clutch, remove the belt from the generator pulley and use a trim removal tool to hold fan blades inside generator, as shown below. When attempting to turn pulley by hand with fan blades held, pulley should spin freely in only one direction. If pulley spins freely in both directions, the one way clutch has failed and should be replaced before continuing diagnosis.

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