A3 Quattro L4-2.0L Turbo (CBFA) (2009)
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Close shut off valve on fuel inj. pressure gauge-CIS (V.A.G 1318). Lever stands perpendicular to direction of flow - arrow -.
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Connect vehicle diagnosis, testing and information system (VAS 5051B).
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Press buttons for "Vehicle Self-Diagnosis", " Engine electronics" and "Output Diagnostic Test Mode (DTM)" one after another on the display.
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Press right arrow button on display until output Diagnostic Test Mode (DTM) of Fuel Pump (FP) electronics.
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The fuel pump must start running.
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Read fuel pressure on fuel injection pressure gauge (V.A.G 1318).
‹› Specified value: approximately 5 bar (3 to 6 bar) pressure.
If the specification is not obtained:
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Check delivery rate of fuel pump => Fuel Supply System
20 Diagnosis and Testing.
Residual Pressure, Checking
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Check for leaks and residual pressure by observing pressure drop on fuel inj. pressure gauge-CIS K-Jetronic (V.A.G 1318).
‹› After 10 minutes there must be a residual pressure of at least 3 bar.
If residual pressure drops below 3 bar:
‹› Check connection between fuel inj. pressure gauge-CIS K-Jetronic (V.A.G 1318) and fuel supply line for leaks.