Removal
To remove the air damper control drive motors, perform the following operations.
1. Disconnect the cable from the negative terminal of the battery.
2. Remove the radio.
Fig. 18.8. Electric motors for air conditioner air damper control drives with automatic control: 1 – lower cover of the instrument panel; 2 – electric motor for driving external air exchange dampers; 3 – air mixing flap drive electric motor assembly; 4 – storage box; 5 – electric motor for driving the internal and external air exchange flaps; 6 – side cover (both sides); 7 – radio
3. Loosen the screws and remove the side covers 6 from both sides (Fig. 18.8).
4. Loosen the screws, disconnect the electrical connector and remove the air mixing flap drive motor 3 assembly.
5. Remove the lower instrument panel cover.
6. Remove the electric motor 2 of the external air exchange damper drive.
7. Remove the glove box.
8. Loosen the screws, disconnect the electrical connector and remove the electric motor 5 of the internal and external air exchange damper drive.
Examination
Fig. 18.9. Location of connector contacts and checking the electric motor of the internal and external air exchange dampers: 1 – lever for driving the internal and external air exchange flaps
1. When checking the electric motor of the internal and external air exchange dampers, make sure that the lever moves when battery voltage is applied to contacts "1" and "3" of the side connector of the electric motor (Fig. 18.9). Also make sure that when the polarity is changed, the lever moves in the opposite direction.
Warning! Turn off the power supply if the damper is inside or outside the duct. If the motor shaft does not rotate when power is applied, turn off the power supply.
Fig. 18.10. Location of connector contacts and checking the air mixing flap drive electric motor: 1 – air mixing flap drive lever
2. When checking the air mixing flap drive motor, make sure that the lever moves when battery voltage is applied to contacts "1" and "3" of the side connector of the electric motor (Fig. 18.10). Also make sure that when the polarity is changed, the lever moves in the opposite direction.
Caution! Turn off the power supply if the damper is in the "MAX HOT" or "MAX COOL" position. If the motor shaft does not rotate when power is supplied, turn off the power supply.
Fig. 18.11. Location of connector contacts and checking the electric motor of the external air exchange damper drive: 1 – lever for driving external air exchange
3. When checking the electric motor of the outside air exchange flap drive, make sure that the lever moves when battery voltage is applied to contacts "1" and "3" of the side connector of the electric motor (Fig. 18.11). Also make sure that when the polarity is changed, the lever moves in the opposite direction.
Caution! Turn off the power supply if the throttle is in the "DEF" or "FACE" position. Turn off the power supply if the motor shaft does not rotate when power is applied.
4. When checking the potentiometer, connect the tester to terminals "2" and "5" of the electric motor assembly connector and check that the resistance changes smoothly when moving the valve from the "DEF" position to the "FACE" position (see Fig. 18.11).
Nominal resistance, kOhm:
- "DEF" position – about 4.82;
- "FACE" position - about 0.18.
Installation
Installation is carried out in the reverse order of removal.