A/C Pressure/Temperature Sensor -G395-, CHECKING PRESSURE SIGNAL: Notes

The cooling output cannot be checked when the A/C Pressure/Temperature Sensor -G395- is removed. The Climatronic Control Module -J255- display and control head does not switch on the A/C compressor using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

To check the measured values for the A/C Pressure/Temperature Sensor -G395- using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

The A/C Pressure/Temperature Sensor -G395- exchanges information with the Vehicle Electrical System Control Module -J519- via a local Data Bus. The Vehicle Electrical System Control Module -J519- transmits the data via the Data Bus to the Climatronic Control Module -J255- display and control head.

The temperature measured by the A/C Pressure/Temperature Sensor -G395- differs from the actual refrigerant temperature because of the A/C Pressure/Temperature Sensor -G395- design and its component location. Therefore it is not currently evaluated and is not used to regulate the A/C system.

Only the A/C Pressure/Temperature Sensor -G395- may be installed for this vehicle. Refer to the Parts Information.

After switching off the A/C compressor in this vehicle, it may take a relatively long time for the pressure on the high pressure side to decrease. This is because the expansion valve is "cold" and the pressure on the low pressure side increases quickly after shutting the compressor off, then the expansion valve closes and the refrigerant flows slowly to the low pressure side.