Control panel for air conditioner with manual control.
1 - heater electric fan switch (fan speed control), 2 - switches for selecting the direction of air flows (air flow control), 3 - temperature controller switch (air temperature control), 4 - switches for selecting the air intake location, 5 - air conditioner switch, 6 - switch for the rear door glass defroster and side mirror heaters.
General information
The control panel uses a combination of rotary knob switches and touch controls.
The air flow through the heater and air conditioner is controlled by means of a resistor, which, by the position of the switch, changes the voltage on the heater fan motor.
Control of air direction selection damper, air intake selection damper and mixing damper (for temperature controller) carried out by means of servo drives. The position of the servomotor of the damper for selecting the direction of air flows and the servo of the damper for mixing air flows is controlled by signals from the built-in sensors.
The compressor is controlled by an electronic engine control unit, which, at the signal of the air conditioner switch (ON/OFF positions) turns the compressor magnetic clutch relay on and off. The condition of the air conditioning system is controlled by a thermal switch (sensor-switch for the temperature of the refrigerant in the evaporator) and a triple switch for refrigerant pressure in the system.
Removal and installation of the control panel of a heater and the conditioner
The procedures for removing and installing the heater and air conditioning control panel are given in chapter "Body".
Checking the heater and air conditioning control panel
1. Checking the heater fan switch.
- A) Check for continuity between the terminals of the heater blower switch connector at various switch positions.
Switch position | conclusions |
OFF | - |
1 (LOW) | 1 ↔ 4 ↔ 5 |
2 (ML) | 2 ↔ 4 ↔ 5 |
3 (MN) | 4 ↔ 5↔ 6 |
4 (HIGH) | 3 ↔ 4 ↔ 5 |
- b) If the circuit condition is not as specified, replace the heater and air conditioning control panel.
2. Checking the air intake location selection switch.
- A) Check for continuity between the terminals of the air intake selector switch connector at various switch positions.
Switch position | conclusions |
FRESH | 5 ↔ 9 |
RECIRCE | 13 ↔ 9 |
- b) If the circuit condition is not as specified, replace the heater and air conditioning control panel.
3. Checking the temperature controller switch.
- A) Check for continuity between the terminals of the temperature controller switch connector at various switch positions.
Switch position | conclusions |
VENT | 6 ↔ 9 |
B/L | 7 ↔ 9 |
FLOOR | 8 ↔ 9 |
MIX | 14 ↔ 9 |
DEFROST | 15 ↔ 9 |
- b) If the circuit condition is not as specified, replace the heater and air conditioning control panel.