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Removing and installing air mass meterG70 > < Diesel direct injection system

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Removing and installing fuel pressure senderG247
Removing and installing fuel pressure sender -G247-
t  Removing → Anchor
t  Installing → Anchor
   
The fuel pressure sender -G247--1- (common rail pressure sensor) is located in the high-pressure accumulator and continuously measures the fuel pressure in the high-pressure system. It transmits a corresponding voltage signal to the direct diesel injection system control unit -J248-.
If the sender fails, the pressure is regulated by the engine control unit using a map. In back-up function, the maximum engine speed is limited to approx. 3000 rpm.
  A23-10420
Removing
–  Loosen the engine cover at the locations -arrows- and remove.
  Caution
Always read rules for cleanliness and instructions for working on fuel system → Chapter.
Follow these instructions before starting work and while working on the fuel system.
–  Before removal, the surface of the thread around the fuel pressure sender (for example, using a refrigerant cleaning agent). No dirt must enter the bore in the high-pressure accumulator.
  Note
Proceed carefully. The cleaning agent should not enter in the connection.
–  Dry fuel pressure sender -G247-.
  E10-10087
–  Disconnect electrical connector -1- from the fuel pressure sender -G247-.
–  Unscrew fuel pressure sender -G247-.
–  Suction out the dirt from the opening of the high pressure tank (thread and sealing surface). Do not use metal tools, etc.
  Note
Seal off bore in the fuel pressure sender immediately with a suitable plug to prevent dirt from entering.
Installing
  Note
t  Make sure that the sealing surface (sealing using a edged profile) and that the thread of the new fuel pressure sender -G247- are not damaged.
t  Also check sealing surface at high-pressure accumulator bore.
t  The thread of the fuel pressure sender -G247- is provided via a lubricating film surface treatment. The thread must be free of oil and grease.
–  Tighten the fuel pressure sender -G247- by hand.
–  Tighten sender. Tightening torque → Item
–  Let the engine run for a few minutes at average speed after the assembly and then switch it off again.
–  Check the entire fuel system for leaks.
–  Read fault memory.
–  Perform a test drive over approx. 20 km. In doing so, accelerate with full gas at least one time.
–  Check the high-pressure system for leaks again.
–  Read fault memory.
  A23-10420

Removing and installing air mass meterG70 > < Diesel direct injection system