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Rules for cleanliness > < Releasing pressure in high-pressure area (engine codes CAWA, CAWB, CBFA, CCTA, CCTB, BZB, CGYA, CDAA, CDAB)

Golf Mk5

Releasing pressure in high pressure area (engine codes CCZA, CCZB, CCZC, CCZD)
Releasing pressure in high pressure area (engine codes CCZA, CCZB, CCZC, CCZD)
  WARNING
The injection system consists of a high-pressure section (maximum approx. 120 bar) and a low-pressure section (approx. 6 bar).
Prior to opening the high-pressure area, e.g. when removing the fuel pressure sender -G247-, the fuel pressure in the high-pressure area must be reduced to a residual pressure of approx. 6 bar. The appropriate procedure is described as follows.
–  Connect vehicle diagnosis tester and perform the guided function „Releasing high-pressure in fuel system“.
–  Switch off ignition.
  WARNING
The fuel lines are pressurised! Wear eye protection and protective clothing to avoid possible injury and skin contact. Before opening the high-pressure section, wrap a cloth around the connection.
–  Wrap a clean cloth around the connection and carefully open to release residual pressure of approx. 6 bar. Catch the escaping fuel.
–  When work is complete, read event memory of engine control unit and erase all event entries.
  Note
If the event memory was cleared, the readiness code must be generated → Vehicle diagnostic tester„Guided functions“.
   

Rules for cleanliness > < Releasing pressure in high-pressure area (engine codes CAWA, CAWB, CBFA, CCTA, CCTB, BZB, CGYA, CDAA, CDAB)