Refrigerant Pressure Sensor / Switch: Service and Repair

64 53 521 Replacing Safety Pressure Switch (N63)







WARNING:
Danger of injury.
Refrigerant circuit is under high pressure.
Avoid contact with refrigerant and refrigerant fluid.
Read and comply with safety information:
- Handling R 134a (tetrafluorethane) refrigerant
- Handling refrigerant fluid







IMPORTANT:
Risk of damage.
Restart engine only when air conditioning system has been correctly filled.
Follow instructions for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours:Replace dryer insert for air conditioning







Necessary preliminary work:
- Drain off air conditioning system
- Disconnect battery earth lead
- Remove right suspension crossbrace
- Remove right intake port







Release screws (1).
Tightening torque 12 90 2AZ.
Remove electronics box cover (2).







Unclip and unplug all connectors (1) from control units.
Unclip grommet hold-down device (2) and remove.
Detach rubber grommets (3) from electronics box.
Place wiring harnesses to the side.

Installation note:
Make sure grommets are is correctly seated (watertightness).







Release screw (1).
Remove lead (2) from connecting piece.







Unfasten plug connection (1) and disconnect.
Release safety pressure switch (2).
Tightening torque 64 53 8AZ.







After installation:
- Evacuate and fill air conditioning system