S5 Quattro Coupe V8-4.2L (CAUA) (2009)
Display on (VAS 5051B):
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Check read-out in display field - 3 -:
‹› Fuel pressure in fuel rail must sink to approximately 7 bar.
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Switch off ignition.
The fuel rail will continue to be filled with fuel, but it will no longer be under high pressure.
Now components or lines can be opened.
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Lay clean cloths around connectors and catch escaping fuel.
Final procedures
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Re-connect electrical connectors.
Faults are saved in ECM when electrical connectors are disconnected:
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Connect Vehicle Diagnosis, Testing and Information System (VAS 5051B).
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Start "Guided Functions" operating mode.
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Generate readiness code in ECM.