Description And Operation: Operation
Manual Temperature Control (MTC)
The manual climate control system is used to heat up and cool down the vehicle.
This HVAC system is composed of:
- A blower motor
- A blower motor speed regulator
- Three actuators with potentiometer for position return signal (one for distribution, one for mixing, one for recirculation)
- A NTC sensor for defrosting function on the evaporator
- A PTC (Cabin Heater) for additional heating
- HVAC module
- A/C heater control - integral to the Integrated Center Stack (ICS)
The HVAC module is connected to the Controller Area Network - Body (CAN-B) data bus and receives the information of the humidity sensor from the Instrument Panel Cluster (IPC) via CAN.
The A/C activation request from the user and the heated rear window activation request are sent to the Body Control Module (BCM) via CAN.
The A/C request status and the actuator position are stored in the HVAC module.
This system manages air recirculation, distribution and temperature using the actuators with potentiometer, for opening, closing and regulating the intermediate positions via electrical commands.
The HVAC module acquires the temperature of the evaporator, via an NTC (frost) sensor, positioned in the air flowing through the evaporator, in order to manage the valve for external control of the variable displacement of the External Control Variable Displacement (ECVD) compressor.
This system can be updated with an additional PTC component to heat up the air more rapidly when the engine is cold.
The HVAC module manages activation of the additional PTC via two relays.
Automatic Dual Zone Temperature Control (ATC)
The automatic climate control system is used to heat up and cool down the vehicle.
This HVAC system is composed of:
- A blower motor
- A blower motor speed regulator
- Four actuators with potentiometer for position return signal (one for distribution, two for mixing, one for recirculation)
- Four NTC air outlet sensors to measure the air temperature (two for temperature of the lower position air distribution and two for the upper position air distribution)
- A PTC (Cabin Heater) for additional heating, if equipped
- Solar radiation/dusk (Sun) sensor
- Ambient temperature sensor (data sent via CAN from the BCM)
- A NTC sensor for defrosting function on the evaporator
- A motorized sensor for the internal passenger compartment (in-car) temperature
- HVAC module
- A/C heater control - integral to the ICS
The HVAC module is connected to the CAN-B data bus and receives the humidity sensor information from the IPC via CAN.
The A/C activation request from the user and the heated rear window activation request are sent to the BCM via CAN.
The A/C request status and the actuator position are stored in the HVAC module.
This system manages air recirculation, distribution and temperature using the actuators with potentiometer, for opening, closing and regulating the intermediate positions via electrical commands.
The HVAC module controls the mixing temperatures through the temperature sensors located in the climate control system.
The system manages the air temperature request by also monitoring solar radiation through a dedicated sensor located on the dashboard.
The HVAC module acquires the temperature of the evaporator, via a NTC sensor, positioned in the air flowing through the evaporator, in order to manage the valve for external control of the variable displacement of the ECVD compressor.
The system can be updated with an additional PTC component to heat up the air more rapidly when the engine is cold.
The HVAC module manages activation of the additional PTC via two relays.
The HVAC module manages activation of the rear window defroster.