4 Zone Climate Control
4 Zone Climate Control
Functionality
Rear Climate Control is available on all Cayenne models
The additional Climate Control functions independently of the front Climate Control The temperature, air volume (fan) and air distribution can be set individually for the left and right sides (zones). In combination with the 2 zone Climate Control in front, the AC in the inside of the vehicle can be set separately for all 4 zones.
Setting all 4 zones can be done from the front control panel. For both rear ;'ones there is an extra button, under the hinged cover, on the front control panel. After shortly pressing this button, the settings for the rear area can be carried out.
It is also possible to control the rear AC from the back seats on the rear control panel (see rear control panel in the next section).
The additional climate control for the rear passengers is a "recirculation air climate control" and uses internal air during operation.
The 4-zone climate control also uses the air quality sensor - located in the external air duct of the climate control that provides values for the "automatic recirculation air control"
Operation, front (4 Zone Climate Control)
The front liquid crystal display can show the following functions:
- Selected temperature, individually for the left & right side, front & back
- Air Volume (fan setting), individually for the left & right side, front & back
- Air distribution, individually for the left & right side, front & hack
- Time is synchronized to the PCM or instrument panel
The following section details various operating functions:
C - Auto Button (automatic operation), REST Button (motor residual warmth with vehicles with 4 zone Climate Control)
a. For the front and rear AC zones, automatic operation can he selected independently of each other. If the auto button is pressed in front or in back, the integrated diode will light up (for further functions see "Auto Button" in section "2 Zone Climate Control").
b. In vehicles with 4 zone Climate Control, using the Auto button after the ignition is turned off, motor residual warmth can be used to heat the inside of the vehicle for a maximum of 20 minutes. Press the Auto button one time shortly, ignition is off). In the display the word "REST" can be seen. In REST operation. the Climate Control settings cannot be changed. If the Auto button is pushed again, this function will turn off (for further functions see "REST Button" in section "2 Zone Climate Control").
If the battery is low, REST operation cannot he used.
D-Automatic Circulating Air
See section "2 Zone Climate Control".
G - Buttons for Air Volumes (Fan) left side
(This example is valid for all possible settings)
a The volume of air can be selected individually for all four AC zones.
H - Button for Temperature, left side
(This example is valid for all possible temperature settings)
a. The temperature can be selected individually for all 4 AC zones.
I - Air Distribution to the Front Windshield, left side
(This example is valid for all possible air distribution settings)
a. The air distribution can be selected individually for all 4 AC zones.
M - Setting the Extra Climate Control for Rear Passengers
a. Press the button one time (display will show that the additional Climate Control is on). The rear AC zones can now be set or controlled using the front control panel.
N - ECON Button (AC compressor on/off)
See section "2 Zone Climate Control".
The four buttons (on the inside) for auxiliary heat are described in the section "Auxiliary Heat".
Rear Operation (4 lone Climate Control)
The control panel for the rear Climate Control can he found for all rear passengers between the front seats on the hack of the middle console. The control panel is similar to the front 2 zone control panel and has the following extra buttons:
- Auto function
- Turn on seat heater
- Turn off seat heater
The following functions can be seen in the rear liquid crystal display:
- Desired temperature, individually for the left and right side
- Individual air volume (fan settings) for the left and right side
- Individual air distribution for the left and right side
- Seat heating mode, left and right side
The following section details various operating functions:
H - Temperature Button, left side
Seat Heater, left side (examples are for left rear)
a. Button for setting the temperature
b. After the seat heater is turned on with the ON button (button "T"), the "H" button can set the warmth continuously. The "H" button can be pressed up for hot or down for cool. The warmth intensity will be shown in the display (horizontal bar).
The seat heater is functional when the ignition is on. When the seat heater is turned on (Button "T") the display will switch over to seat heater mode for about 10 seconds.
Further functions on the rear control panel are identical to those on the front control panel and can be thus explained.
When the child safety lock is active, nothing can be changed or set on the rear control panel (display is off).
Cooling Cycle (4 Zone Climate Control)
The rear cooling circulation is directly connected to the high and low pressure sides of the frontal cooling circulation through I-lines. The I-lines are located in front of the left front wheel housing cover near the pressure damper (for the posit on of the pressure damper see section "2 Zone Climate Control" diagram 8_17_O3). The refrigerant flows in the direction of the circulation through the following parts:
1. T-line (flow)
2. Expansion Flap (flow)
3. Evaporator (rear)
4. Expansion Flap (return)
5. T-line (return)
The wiring connection of the cooling and heating circulations to the rear heating unit can be seen in section "Air and Valve Control" and in diagram 8_O5_03,
Expansion Flap Rear (4 Zone Climate Control)
The position of the expansion flap can be seen in section "Air and Flap Control" in diagram 8_O5_03. For flap functionality, see section "Expansion Flap (front").
Evaporator, Rear (4 Zone Climate Control)
The position of the evaporator can be see in section "Air and Flap Control" in diagram 8_O5_03. For evaporator functionality, see section "Evaporator (front)".
System Overview/Block Diagrams (4 Zone Climate Control)
The block diagram shown here for the front control module shows the most important actuators and sensors that are necessary for the control of the 4 zone Climate Control. Many of the actuators and sensors that are used are similar to those in the 2 zone Climate Control but have a different wiring scheme in the control module.
The following block diagram shows the most important actuators and sensors that are connected to the rear control module.
Actuators and Sensors (4 zone Climate Control)
The same actuators and sensors are used to control the 4 AC zones that were shown in section for 2 zone Climate Control. Along with the rear fan and flap control, the following sensors are used in the rear zones:
- Motor for Air Volume
With 4 zone Climate Control it is possible to distribute the air created by the fan motor both separately and individually to each rear zone. The positions of the two flap motors for this can be see in section "Air and Flap Control" diagram 8_O5_O3.
- Motor for Middle Vent and Floor/B-Column Vent
The flap motors for the middle vents can be found directly on the air duct, right in front of the vent openings in the middle console. The flap motors for the floor/b-column vents are located on the separations of each air duct (see section "Air Flow" diagram 8_03_03).
- Temperature Sensor Air Duct
For functionality, see section "2 Zone Climate Control". Both sensors are integrated into the air duct approximately 500 mm after the exit line of the heating unit. Both ducts are uncoiled here at the same height as the metal from the underbody (see section "Air Flow" diagram O8_03_03).
- Fan Control (Air Volume Control), rear
For functionality, see section "2 Zone Climate Control". The position of the control module (fan control) can be seen in section "Air and Flap Control" diagram 8_O5_03.