Climate Control, Control Unit, Component Description - GF83.40-P-2250GWM
Model 463 (except 463.342)
as of model year 2019
Location
The A/C control unit is located on the front side of the A/C housing on the passenger side.
Task
The A/C control unit is responsible for the following tasks:
- Reading in of sensors and signals
- Evaluation of input factors
- Actuation of components
- Transmitting signals
Reading in of sensors and signals
The input factors are read in via the following connections:
- Direct line
- Climate control LIN 1 (LIN B8-1)
- A/C operating unit LIN (LIN B8-3)
- Interior CAN (CAN B)
Direct line
The climate control, control unit reads in the signals from the following components via direct lines:
- Interior temperature sensor (B10/4)
- Evaporator temperature sensor (B10/6)
- Rear air duct air outlet temperature sensor (B10/7)
- Left side air vent air outlet temperature sensor (B10/31)
- Right side air vent air outlet temperature sensor (B10/32)
- Left footwell vent air outlet temperature sensor (B10/35)
- Right footwell vent air outlet temperature sensor (B10/36)
- Refrigerant pressure sensor (B12)
Climate control LIN 1
The climate control, control unit reads in the signals from the air quality sensor (B31) over climate control LIN 1.
AC operation LIN
The climate control, control unit reads in the signals from the following components via the climate control LIN:
- Stationary heater radio remote control receiver (A6/1) (with code H12 (Stationary heater))
- Climate control operating unit (N58/1)
- Rear air conditioning operating unit (N22/4)
Interior CAN
The climate control, control unit receives the following information via the interior CAN, among others:
- Outside temperature
- Interior temperature
- Status of side window
- Status of sliding sunroof (with code F15 (Sliding sunroof))
- Coolant temperature
- Vehicle speed
- Engine speed
- Crash signal
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.
Actuation of components
The actuation of the components takes place via the following connections:
- Direct line
- Climate control LIN 1
- Climate control LIN 2
- AC operation LIN
Direct line
The climate control, control unit actuates the following components via direct lines:
- Refrigerant compressor (A9) (engine 176, 177)
- Refrigerant compressor with magnetic clutch (A9/7) (engine 656)
- Coolant circulation pump (M13/5)
Climate control LIN 1
The climate control, control unit actuates the following component parts via the air conditioning control LIN 1:
- Left blend air flap actuator motor (M2/8)
- Right blend air flap actuator motor (M2/9)
- Rear blend air flap actuator motor (M2/10)
- Left footwell/center air vent/side air vent and rear air vent flap actuator motor (M2/11)
- Right footwell/center air vent and side air vent flap actuator motor (M2/12)
- Fresh air/ram air/air recirculation flap actuator motor (M2/13)
- Defroster flap actuator motor (M2/15)
- Left B-pillar air distribution actuator motor (M16/33)
- Right B-pillar air distribution actuator motor (M16/34)
Climate control LIN 2
The climate control, control unit actuates the following components via climate control LIN 2:
- Stationary heater control unit (A6n1) (with code H12 (Stationary heater))
- Electronic blower motor (A32m1)
- Driver side air vent ionizer (N18/9) (with code HA1 (Fresh Air Package))
- Rear blower motor (M2/1)
- PTC heater booster (R22/3) (engine 656)
AC operation LIN
The climate control, control unit actuates the following components via the climate control LIN:
- Climate control operating unit
- Rear air conditioning operating unit
Transmitting signals
The climate control, control unit transmits the following signals via the interior CAN, among other things:
- Engine fan rotational speed request
- Ionization status (with code HA1 (Fresh Air Package))
- Status of stationary heater/stationary ventilation (with code H12 (Stationary heater))
- Preselection time status
- Status of convenience feature
- Diagnosis request
- Request for message display
| Wiring diagram for climate control, control unit | PE83.40-P-2104-97ZHA |