VW Passat repair


+ 1. Ekspluatatsiiya of the car
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling system
+ 5. Power supply system
+ 6. System of ignition
+ 7. Coupling
+ 8. Transmission
+ 9. Drive of forward wheels
+ 10. Suspension brackets
+ 11. Steering
+ 12. Brake system
+ 13. Wheels and tires
- 14. Systems of heating, ventilation and conditioning
   14.1. Technical characteristics
   14.2. General information
   14.3. Air conditioning system with the circulating coolant
   14.4. Precautionary measures at service of air conditioning system
   + 14.5. Search of malfunctions
   14.6. Filling of the conditioner with coolant
   14.7. Search and elimination of malfunctions in systems of heating and conditioning
   14.8. Airdistributing box
   14.9. Fan
   14:10. Cover of airinflow and vacuum system
   14:11. Air-receiver
   + 14:12. Heater fan
   + 14:13. Cables of management
   + 14:14. Air conditioning system units
   - 14:15. Basic provisions on service of the conditioner
      14.15.1. Conditions of carrying out tests of operability of the conditioner
+ 15. Electric equipment
+ 16. Body
+ 17. Electric circuits



ed639308


Repair Volkswagen Passat B3-B4/Passat B3-B4>> Systems of heating, ventilation and conditioning>> Basic provisions on service of the conditioner>> Conditions of carrying out tests of operability of the conditioner
All ventilating channels have to be open.
The engine has to be heated-up and work at frequency of rotation about 2000 min.-1.
The fan has to work at high speed "4".
The handle of a temperature regulator has to be transferred to a provision of "COLD".
The Move A/S switch has to be translated in situation "On".
Glasses have to be in the doorway lifted, doors are closed.
Indications of temperature have to be read out on the left ventilating channel after switching off of the compressor.
Fig. 14.22. Dependence of air temperature at the exit from the conditioner from temperature of outboard air


Fig. 14.23. Dependence of pressure in the conditioner (the site of low pressure) from temperature of outboard air. The top curve — turning on of the compressor the conditioner thermostat, lower — switching off


Fig. 14.24. Dependence of pressure in the conditioner (the site of high pressure) from temperature of outboard air. The fan at a high speed of rotation turns on in a point And (growth of pressure) and is switched off in a point In (pressure drop)


Serviceable air conditioning system has to provide the characteristics provided on fig. 14.22 , 14.23 , 14.24 .