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Checking activation signal for air conditioner compressor regulating valveN280 > < Checking pressure signal from high-pressure senderG65

A1

Removing and installing high-pressure senderG65
Removing and installing high-pressure sender -G65-
  Note
t  The cooling output cannot be checked with the high-pressure sender -G65- removed; the operating unit, Climatronic control unit -J255- / air conditioning system control unit -J301- does not switch on the air conditioner compressor → Vehicle diagnostic tester, air conditioner „Guided fault-finding“ function „Reading measured values“.
t  The refrigerant circuit remains closed (connection with valve).
t  Checking operation of high-pressure sender -G65- and signal supplied → Chapter.
t  After switching off the air conditioner compressor, a relatively long period may elapse with this vehicle before the pressure on the high-pressure end decreases (the expansion valve is cold and the pressure on the low-pressure end increases rapidly after switch-off, the expansion valve closes and the refrigerant can only flow slowly to the low-pressure end).
   
Removing
–  Screw out the bolts -arrows-.
–  Unplug the connector -1-.
–  Lift the coolant expansion tank out of the guide and lay it aside with the coolant hoses connected.
  A19-11174
–  Unplug the connector -1-.
–  Screw out the high-pressure sender -G65--2-.
Installing
l  Tightening torque 8 Nm
Install in reverse order, paying attention to the following:
–  Replace the O-ring → Chapter. For assignment, refer to → Electronic parts catalogue.
–  Install the coolant expansion tank → Rep. gr.19.
  A87-10855

Checking activation signal for air conditioner compressor regulating valveN280 > < Checking pressure signal from high-pressure senderG65