Contents: Heater Control Panel Switches ⬇ Heater control panel ⬇ Heater control unit ⬇ Air distribution unit ⬇ Heater radiator ⬇ Blower fan ⬇ Heater Control Cable - Driver Side ⬇ Heater Control Cable - Passenger Side ⬇ Air recirculation system solenoid…⬇ Vacuum block of the air…⬇ Vacuum block of the defroster valve ⬇ Vacuum block of the air duct valve…⬇
Control diagram of the ventilation and heating system
1. Vacuum manifold
2. Blue vacuum hose
3. Vacuum block of air recirculation valve
4. Vacuum block of the de-icer valve
5. Brown vacuum hose
6. Vacuum block of the air duct valve for heating the feet
7. Green vacuum hose
8. Connector
9. Heater control
10. Air recirculation switch
11. Solenoid valve wire
12. Blue hose
13. Solenoid valve
14. Yellow hose
15. Dividing partition
16. Vacuum hose
The heating and ventilation system is controlled by a series of valves that direct air through the desired air ducts.
Heater Control Panel Switches
Removal
1. Disconnect the negative battery cable.
2. Wrap the ends of two small screwdrivers with electrical tape.
3. Insert screwdrivers into the holes on each side of the switch you are removing. Lightly press the tabs and remove the switch button.
4. Squeeze the latches located on the sides of the switch and remove the switch from the panel.
Installation
Installation is carried out in the reverse order of removal.
Heater control panel
Removal
1. Remove the switches from the control panel.
2. Remove the four handwheels from the heating and air distribution control pins.
3. Remove the radio.
4. Remove the glove box.
5. Remove the five control panel screws.
6. Remove the panel from the heater control unit.
7. Disconnect the wires from the panel.
Installation
Installation is carried out in the reverse order of removal.
Heater control unit
Removal
1. Remove the control panel.
2. Remove the screws and remove the unit.
3. Disconnect the cables from the control rods.
4. Disconnect the wire from the back of the fan control switch.
5. Disconnect the vacuum hose manifold from the rear of the block.
6. Remove the block.
Installation
Installation is carried out in the reverse order of removal.
Air distribution unit
Removal
1. Drain the coolant and remove the instrument panel.
2. Disconnect the air conditioning pipes from the engine compartment firewall, have a professional perform this procedure.
3. Disconnect the air duct from the driver's side vent.
4. Remove the steering column brace.
5. Remove the bolt and disconnect the ground wire from the engine compartment bulkhead.
6. Disconnect the wire from the blower motor.
7. Disconnect the pipes from the heater radiator and drain the coolant into a suitable container and close the pipe openings with plugs.
8. On models with air conditioning, disconnect the rear coolant shutoff valve vacuum hose.
9. Disconnect the wire from the EGR solenoid valve.
10. On models without climate control, disconnect the yellow hose from the air distribution unit.
11. Remove the screws and disconnect the air ducts located in the rear seat footwells from the air distribution unit.
12. Disconnect the blue hose from the EGR valve vacuum block.
13. On automatic transmission models, disconnect the shift lever cable from the EGR solenoid valve.
14. Remove the two air distribution unit mounting bolts located near the top edge of the partition wall and one bolt located inside the passenger compartment.
15. Remove the block.
Installation
Installation is carried out in the reverse order of removal (don't forget to replace old tube seals).
Heater radiator
See. subsection 4.9.
Blower fan
See. subsection 4.10.
Heater Control Cable - Driver Side
Removal
1. Remove the instrument panel to gain access to the air distribution unit.
2. Remove the retaining ring and disconnect the cable from the control lever on the distribution block.
3. Remove the heater control panel.
4. Remove the retaining ring and disconnect the cable from the end of the control rod.
5. Remove the cable.
Installation
Installation is carried out in the reverse order of removal.
Heater Control Cable - Passenger Side
Removal
The procedure is similar to the procedure for removing the cable from the driver's side (see higher), with the difference that to gain access to the cable it is necessary to remove the air duct located in the front passenger footwell.
Air recirculation system solenoid valve
Removal
1. Disconnect the negative battery cable.
2. Remove the lower trim panel on the driver's side and remove the air duct located in the footwell.
3. The solenoid valve is attached to the left side of the air distribution unit. Disconnect the hoses and wires from the valve.
4. Unscrew the screw and remove the valve.
Installation
Installation is carried out in the reverse order of removal.
Vacuum block of the air recirculation system valve
Removal
1. Remove the glove box.
2. Disconnect the wiring harness and air duct.
3. The unit is located on the left side of the blower fan housing.
4. Disconnect the blue hose from the unit.
5. Disconnect and remove the unit.
Installation
Installation is carried out in the reverse order of removal.
Vacuum block of the defroster valve
The defroster unit is located on the right side of the air distributor and has a brown hose connected to it.
Vacuum block of the air duct valve for foot warmers
The unit is located on the right side of the air distributor and has a green hose connected to it.
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