Special Servicing Tools and Equipment

The in-car temperature and humidity are regulated by the electronically controlled air conditioning system. The system comprises four subsystems:

• heater matrix, supplied with water from the engine cooling system
• refrigeration
• vacuum
• electronic control

Apart from the ambient temperature sensor and the aspirated in-car temperature sensor, most of the components are housed in the air conditioning unit (Fig. 1) situated behind the dash board, or in the engine compartment.

1. Upper feedback potentiometer
2. Water temperature switch
3. Lower feedback potentiometer
4. Vacuum valve block
5. Vacuum restrictor
6. Condensate drain tube
7. Upper servo motor
8. Electronic control module
9. Lower servo motor
10. Evaporator sensor
11. Condensate drain tube

Special Servicing Tools and Equipment

1 PDU system

1 Charging station

1 Leak detector

1 Temperature test box

1 Sanden compressor service tool kit

1 GM Type compressor service tool kit

1 Digital voltmeter

1 Multimeter