Heater disassembly.
1 - upper part of the heater housing, 2 - ventilation mode damper, 3 - ventilation mode damper lever, 4 - windshield heating damper, 5 - windshield heating damper lever, 6 - lower part of the heater housing, 7 - temperature regulator damper, 8 - temperature controller damper lever, 9 - damper "A" temperature controller, 10 - damper lever "A" temperature controller, 11 - bypass damper, 12 - bypass damper lever, 13 - rod holder, 14 - rod, 15 - lever (big) temperature controller dampers, 16 - spring washer, 17 - guide sleeve, 18 - temperature controller damper servo (automatic air conditioner), 19 - guide sleeve, 20 - damper for air supply to the leg area, 21 - spring, 22 - damper lever for air supply to the leg area, 23 - lever (big) dampers for supplying air to the leg area, 24 - spring washer, 25 - lower distribution duct (to the leg area), 26 - guide sleeve, 27 - nut, 28 - bolt with retainer, 29 - seal "A" heater, 30 - retainer, 31 - damper control cam (choice of air flow direction), 32 - spring washer, 33 - thrust holder, 34 - air flow direction selection flap servo drive, 35 - bypass air hose, 36 - heater radiator, 37 - retainer, 38 - heater radiator lining, 39 - stopper, 40 - sensor, 41 - central air duct.
Temperature controller servo test
1. The temperature controller servo is installed in the heater block. Depending on the position of the control switches and switches on the deflectors (air ducts) the servomotor will regulate the temperature and air supply to the passenger compartment.
2. Connect a voltmeter to the terminals "1" (+) And "6" (-) temperature controller servo connector and check the voltage terminals of the connector according to the table.
Switch position | Voltage |
COOL (maximum cooling position) | 0.3±0.15 V |
NOT (maximum heating position) | 4.7±0.15V |
Checking the coolant temperature sensor in the heater (automatic air conditioner)
1. The heater coolant temperature sensor, located in the heater core, measures the temperature of the coolant passing through the heater core. Its signal is used to electronically control the supply of heated air.
2. Sensor check.
- A) Immerse the measuring part of the sensor in water.
- b) Measure the resistance between the sensor leads at the following temperatures and verify that the resistance is within the rated value.
Rated value:
- at a water temperature of 25°C: 12.5±0.5 kOhm
- at a water temperature of 60°C: 2.5±0.3 kOhm
Disassembly and assembly
1. When removing parts, refer to the figure "Heater disassembly".
2. Installation is made in an order, the return to removal.