gf8340p2004tx

Regulation of automatic air conditioning, function

Type gf · topic 83.40 · version 0103 · 2007-01-22

Applies to: MODEL 219.3 except CODE (581) Comfort automatic air conditioning

Where it sits

Function group 3 Body › 83 Climate control › 83.40 Air conditioning (automatic) — Series 219 (models 3**)

GF83.40-P-2004TX

Regulation of automatic air conditioning, function

8.1.07

MODEL 219.3 except CODE (581) Comfort automatic air conditioning

Regulation of automatic air conditioning, function

P83.40-3536-09

1 Vehicle speed signal

2 Air humidity (up to 31.8.06)

3 Actuator motor actuation

4 Blower actuation

5 Window positions

6 Circuit status

7 Interior temperature in head area

8 Door status

9 Actuation of refrigerant compressor

10 Outside temperature

11 Refrigerant pressure and refrigerant temperature (up to 31.5.05),
Refrigerant pressure (as of 1.6.05)

12 Actuating the heater water circulation pump

13 Evaporator temperature

14 Interior temperature in knee area (up to 31.8.06)

B12/2 Refrigerant pressure and temperature sensor (up to 31.5.05)

B14 Outside temperature display temperature sensor

B31/2 Air humidity sensor (up to 31.8.06)

M2/5 Fresh air/air recirculation flaps actuator motor

M2/6 Left blend air flap actuator

M2/7 Right blend air flap actuator

M2/15 Left and right footwell flaps actuator motor

M2/16 Left and right defroster flaps actuator motor

M2/22 Center outlet flap actuator motor

M4/7 Engine and AC electric suction fan with integrated control

M13 Coolant circulation pump

M16/32 Heat exchanger shutoff motor

15 Actuation of engine and AC electric suction fan with integrated control

16 PTC heater booster actuation
(with diesel engine)

17 Position of tilting/sliding roof (SHD) (with code (414) Power glass tilting/sliding sunroof)

18 Actuation of heat exchanger shutoff motor

A1 Instrument cluster

A9 Refrigerant compressor

A32m1 Blower motor

A32n1 Blower regulator

B10/4 In-car temperature sensor
(up to 31.8.06)

B10/6 Evaporator temperature sensor

B12 Refrigerant pressure sensor
(as of 1.6.05)

N3/9 CDI control unit
(with diesel engine)

N3/10 ME-SFI [ME] control unit
(with gasoline engine)

N10/1 Driver-side SAM control unit with fuse and relay module

N10/2 Rear SAM control unit with fuse and relay module

N10/11 Passenger-side SAM control unit

S17/4 Right front door contact switch

S17/5 Left rear door contact switch

S17/6 Right rear door contact switch

CAN-B Controller area network bus class B (interior compartment) (CAN B)

CAN-C Controller Area Network bus, class C (engine compartment) (CAN C)

LIN Local Interconnect Network (LIN)

N22 AAC [KLA] control and operating unit

N69/1 Door control unit front left

N69/2 Door control unit front right

N69/3 Door control unit rear left

N69/4 Door control unit rear right

N70 Overhead control panel control unit

N70b1 In-car temperature sensor

N73 EIS [EZS] control unit

N93 Central gateway control unit

R22/3 PTC heater booster (for diesel engine)

S17/3 Left front door contact switch

Function

The automatic air conditioning (AAC) [KLA] is regulated via the AAC [KLA] control and operating unit. This is networked to the vehicle electronics. This in turn makes it possible to incorporate additional relevant parameters in order to improve regulation quality and to lower power consumption.

The AAC [KLA] control and operating unit receives the following information to regulate the automatic air conditioning:

Direct

Interior temperature in the knee area from the in-car temperature sensor

Temperature on the evaporator from the evaporator temperature sensor

-----------------------------------------------------------------------------------------

Via CAN-B

Ground speed by the instrument cluster

Position of the windows by the door control units

Circuit status from the EIS [EZS] control unit

Interior temperature in head area from the in-car temperature sensor via the overhead control panel control unit

Position of tilting/sliding roof from overhead control panel control unit

Door status from door contact switches via the rear SAM control unit

Outside temperature from the outside temperature display temperature sensor via the driver-side SAM control unit

Refrigerant pressure and temperature from the refrigerant pressure and temperature sensor via the driver SAM control unit or
refrigerant pressure from the refrigerant pressure sensor via the driver SAM control unit

Via LIN

Air humidity by the air humidity sensor

-----------------------------------------------------------------------------------------

To regulate the automatic air conditioning, the following components are actuated:

Via CAN-B

By the driver-side SAM control unit:

Refrigerant compressor

Heat exchanger shutoff motor

From passenger-side SAM control unit:

Coolant circulation pump

Via CAN-C

From the CDI control unit or the ME-SFI [ME] control unit:

Electric suction fan

Via LIN

Blower motor via the blower regulator

for air distribution the:
- fresh air/air recirculation flaps actuator motor
- left blend air flap actuator motor
- right blend air flap actuator motor
- left and right footwell flaps actuator motor
- left and right defroster flaps actuator motor
- center air outlet flap actuator motor

PTC heater booster

Component description of refrigerant compressor

A9

GF83.55-P-2108TX

Blower, component description

A32m1

GF83.10-P-2050TX

Blower regulator, component description

A32n1

GF83.10-P-2051TX

In-car temperature sensor, component description

B10/4

Temperature sensor in the instrument panel

In vehicles up to 31.8.06

GF83.57-P-2127TX

Evaporator temperature sensor, component description

B10/6

GF83.57-P-2126TX

Refrigerant pressure sensor, component description

B12

In vehicles as of 1.6.05

GF83.40-P-2193TX

Refrigerant pressure and temperature sensor, component description

B12/2

On vehicles up to 31.5.05

GF83.40-P-2195TX

Outside air temperature sensor, component description

B14

GF83.57-P-4000TX

Component description of air humidity sensor

B31/2

In vehicles up to 31.8.06

GF83.30-P-2130TX

Actuator motors, component description

M2/5, M2/6, M2/7, M2/15, M2/16, M2/22

GF83.10-P-2201TX

Engine/AC electric suction fan, component description

M4/7

GF83.40-P-2192TX

Coolant circulation pump component description

M13

GF83.75-P-2110TX

Heat exchanger shutoff motor, component description

M16/32

GF83.20-P-3124TX

Driver-side SAM control unit with fuse and relay module, component description

N10/1

GF54.21-P-6010TX

Rear SAM control unit with fuse and relay module, component description

N10/2

GF54.21-P-6030TX

Passenger-side SAM control unit with fuse and relay module component description

N10/11

GF54.21-P-6020TX

Automatic air conditioning control and operating unit, component description

N22

Vehicles up to 31.5.06

GF83.40-P-3000TX

Vehicles as of 1.6.06

GF83.40-P-3000TM

Driver-side front door control unit, component description

N69/1

GF72.29-P-6000TX

Passenger-side front door control unit, component description

N69/2

GF72.29-P-6010TX

Rear door control unit, component description

N69/3, N69/4

GF72.29-P-6020TX

Overhead control panel control unit, component description

N70

GF82.20-P-5216TX

In-car temperature sensor, component description

N70b1

Temperature sensor in the overhead control panel control unit

GF83.57-P-2127TY

Electronic ignition/starter switch control unit (EIS), component description

N73

GF80.57-P-6000TX

Central gateway control unit, component description

N93

GF54.21-P-4170TX

PTC heater booster, component description

R22/3
On vehicles with engine 642.9

GF83.70-P-4063TX

Referenced documents