Regulation of automatic air conditioning, function - GF83.40-P-2004SX
WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2011 Mercedes-Benz S65, 2011 Mercedes-Benz S600, 2011 Mercedes-Benz S550, 2010 Mercedes-Benz S65, and 2010 Mercedes-Benz S63. However, it is still accessible from the selected car via links, so may be relevant.
MODEL 216.3, 221.0 /1 up to Model Year 8
Function
Automatic air conditioning (AAC [KLA]) regulation is performed via the AAC [KLA] control unit. It is networked via the interior CAN, the chassis CAN, the telematics CAN, the central CAN, the AC bus and the AC LIN with the vehicle electronics system. This in turn makes it possible to incorporate additional climate-relevant influences, in order to improve the regulation quality and to lower power consumption.
The AAC [KLA] control unit receives the following information for regulation purposes:
direct
- Interior temperature from the in-car temperature sensor
- Evaporator temperature from the evaporator temperature sensor
Temperature at the air outlets from the:
- Left side outlet temperature sensor
- Right side outlet temperature sensor
- Left footwell temperature sensor
- Right footwell temperature sensor
Refrigerant pressure from the refrigerant pressure sensor
Air flow setting at air outlets from the:
- Left side air outlet potentiometer
- Right side air outlet potentiometer
- Left front center air outlet potentiometer
- Right front center air outlet potentiometer
- Left rear center air outlet potentiometer
- Right rear center air outlet potentiometer
Via the interior CAN
- Circuit status from the EIS [EZS] control unit
- Ground speed by the instrument cluster
- Operation requests from the front central operating unit or from the upper control panel control unit
- Positions of windows and door status from door control units
- Actual position of tilting/sliding roof from the overhead control panel control unit
- Outside temperature from the outside temperature display temperature sensor via the front SAM control unit
Via the AC bus
- Air quality and air humidity from the multifunction sensor
- Solar radiation and intensity from the sun sensor
The following components are actuated for control purposes:
Direct
- Refrigerant compressor
Via the interior CAN
- from front SAM control unit
- Coolant circulation pump
- Air conditioner water valve
Via the chassis CAN
- from the CDI control unit or the ME-SFI [ME] control unit
- Engine and air conditioning electric suction fan
Via the AC LIN
- Blower motor via the blower regulator
- All actuator motors for air distribution
- PTC heater booster
| Instrument cluster, component description | A1 Model 221 |
GF54.30-P-6000SX | |
| Component description of refrigerant compressor | A9 | GF83.55-P-2108SX | |
| Blower, component description | A32m1 | GF83.10-P-2050SX | |
| Blower regulator, component description | A32n1 | GF83.10-P-2051SX | |
| COMAND controller unit, component description | A40/3 Model 221 without code (498) Japan version and without code (494) USA version |
GF82.85-P-3136SX | |
| Model 221 with code (494) USA version | GF82.85-P-3136SXU | ||
| Model 221 with code (498) Japan version | GF82.85-P-3136SXJ | ||
| Cockpit central display, component description | A40/8 Model 221 |
GF54.30-P-6100SX | |
| Front central operating unit, component description | A40/9 Model 221 |
GF54.21-P-4500SX | |
| In-car temperature sensor, component description | B10/4 | GF83.57-P-2127SX | |
| Evaporator temperature sensor, component description | B10/6 | GF83.57-P-2126SX | |
| Air outlet temperature sensor, component description | B10/31, B10/32, B10/35, B10/36 | GF83.57-P-2130SX | |
| Refrigerant pressure sensor, component description | B12 | GF83.40-P-2193SX | |
| Outside air temperature sensor, component description | B14 | GF83.57-P-4000SX | |
| Multifunction sensor, component description | B31/1 | GF83.10-P-2192SX | |
| Sun sensor, component description | B32/2 | GF83.57-P-2128SX | |
| Automatic air conditioning actuator motors, component description | M2/5, M2/8, M2/9, M2/10, M2/11, M2/12, M2/13, M2/17, M2/18, M2/30, M2/31, M2/32, M2/33 | GF83.40-P-2197SX | |
| Engine/AC electric suction fan, component description | M4/7 | GF83.40-P-2192SX | |
| Coolant circulation pump component description | M13 | GF83.75-P-2110SX | |
| B-pillar air distribution actuator motors, component description | M16/33, M16/34 Model 221 |
GF83.40-P-2200SX | |
| Driver-side SAM control unit with fuse and relay module, component description | N10/1 | GF54.21-P-6010SX | |
| Automatic air conditioning control unit, component description | N22/1 | GF83.40-P-3012SX | |
| Driver-side front door control unit, component description | N69/1 Model 216 |
GF72.29-P-6000SC | |
| Model 221 | GF72.29-P-6000SX | ||
| Passenger-side front door control unit, component description | N69/2 Model 216 |
GF72.29-P-6010SC | |
| Model 221 | GF72.29-P-6010SX | ||
| Rear door control unit component description | N69/3, N69/4 Model 221 |
GF72.29-P-6020SX | |
| Overhead control panel control unit, component description | N70 | GF82.20-P-5216SX | |
| Upper control panel control module component description | N72/1 | GF54.21-P-6040SX | |
| Electronic ignition/starter switch control unit (EIS) component description | N73 | GF80.57-P-6000SX | |
| Central gateway control unit, component description | N93 | GF54.21-P-4170SX | |
| PTC heater booster, component description | R22/3 Engine 629.9, 642.9 |
GF83.70-P-4063SX | |
| AC water valve, component description | Y19/2 | GF83.20-P-3125SX |