Jetta Sedan L4-1.9L DSL Turbo (BEW) (2005)
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NOTE:
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If no malfunction is found in relation to this complaint, flush refrigerant circuit with compressed air and nitrogen.
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Check measured values of Evaporator Vent Temperature Sensor G263 and activation of A/C Compressor Regulator Valve N280. If measured
value of High Pressure Sensor G65 is not OK, evaporator may ice up or cooling output is not attained.
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If the function of the air conditioning system is not OK when the test is repeated after replacing expansion valve, re-install old expansion valve and
flush refrigerant circuit with compressed air and nitrogen. Then replace A/C compressor and receiver.
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With this malfunction, evaporator may ice up although quantity of refrigerant in circuit is OK.
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If expansion valve is malfunctioning (permanently closed or does not open sufficiently), A/C Compressor Regulator Valve N280 is actuated to
maximum output and low pressure drops to value in graph or below (compressor draws off refrigerant from low-pressure side). As however
refrigerant cannot flow via expansion valve, cooling output is not attained and high pressure may also not increase or only increase slightly due to
the absence of energy conversion.
