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location of the blockage or restriction can easily be identified. The blockage or restriction
is located at the point where the temperature difference is identified. Note: A
temperature difference in the area of the fixed orifice tube is normal. Once the
location of the blockage or restriction has been detected, check the relevant component
and renew if necessary.
Sudden poor cooling performance. After the air conditioning has been switched off for
approx. 5 minutes, the cooling performance returns to normal:
-
Fixed orifice tube iced up. The cause for an iced-up fixed orifice tube is moisture in the
refrigerant circuit. In order to ensure that moisture is completely removed from the
refrigerant circuit, the suction accumulator must be renewed and the evacuation time
must be extended to 2-3 hours. For further information, refer to REFER to:
Suction Accumulator
Air Conditioning (A/C) System Recovery, Evacuation and Charging
Control System - General Information, General Procedures).
Symptom Chart
Symptom Chart
Symptom
Blower motor inoperative / partly inoperative
Blower motor running continuously
Air conditioning inoperative (blower function OK)
Malfunction of the recirculated air flap
Refrigerant compressor inoperative when switch set to
'Defrost/demist windshield' (other functions of the
control panel for the climate control system OK)
(412-03 Air Conditioning, Removal and Installation),
http://vnx.su
(412-00 Climate
Possible Sources
*
Fuse(s)
*
Circuit(s)
*
Blower motor
*
Blower switch
*
Blower resistor
assembly
*
Blower switch
*
Circuit(s)
*
Fuse(s)
*
Circuit(s)
*
Refrigerant quantity
*
Air conditioning clutch
*
Refrigerant
compressor clutch
diode
*
Refrigerant high-
pressure switch
*
Refrigerant low-
pressure switch
*
Air conditioning clutch
relay
*
Powertrain control
module (PCM)
*
Climate control system
control assembly
*
instrument Cluster
*
Circuit(s)
*
Actuator – recirculated
air flap
*
Recirculated air flap
*
Climate control system
control assembly
*
Dehumidification
switch
*
Circuit(s)
*
Dehumidification
switch
*
Climate control system
control assembly
Action
*
GO to
Pinpoint
Test
A.
*
GO to
Pinpoint
Test
B.
*
GO to
Pinpoint
Test
C.
*
GO to
Pinpoint
Test
D.
*
GO to
Pinpoint
Test
E.
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