Clicking VW TDI

This bulletin applies to Volkswagen vehicles equipped with a TDI diesel engine, such as the 2012 Eos. Under certain conditions, you may heart the glow plug relay J52 clicking on and off after the engine is started.
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VW glow plug guidance

This TSB applies to 2009 VW Jetta models, equipped with the CBEA common rail TDI diesel engine. If glow plug testing becomes necessary, do not jump power or ground directly to the glow plugs. The plugs receive pulse width modulated signals from the ECM.
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