1 Series E87 118d (M47T2) 5-door
The evaporator temperature sensor measures the outlet temperature of the air at the evaporator to prevent icing
from occurring. The evaporator temperature sensor is directly connected to the IHKR/IHKA control unit.
Replacement value for the sensor: -2
°
C
-
Ventilation temperature sensor
A sensor is integrated into the heater/air conditioner to measure the ventilation temperature. The ventilation
temperature sensor measures the delivery temperature directly at the centre ventilating flap on the driver's side.
The ventilation temperature sensor is directly connected to the IHR/IHKR/IHKA control unit.
> E70
If the IHKA High is fitted, there are 2 ventilation sensors (on the ventilation flaps for the driver's and front-
passenger sides).
Replacement value for the sensor: 20
°
C
> E70 with rear hearing/air conditioning
One sensor is fitted at each of the left and right rear air vents in the centre console.
-
Footwell temperature sensor
> E81, E82, E87, E90, E91, E92, E93
A sensor is integrated into the heater/air conditioner to measure the footwell temperature. The footwell
temperature sensor measures the delivery temperature directly at the footwell flap on the driver's side. The
footwell temperature sensor is directly connected to the IHR/IHKR/IHKA control unit.
Replacement value for the sensor: 20
°
C
> E70 with rear hearing/air conditioning
One sensor is attached to each of the left and right footwell air vents in the rear compartment.
-
Sensor for heating system heat exchanger
> E70
The sensor is integrated in the heating/air-conditioning system. On the IHKA Basic, the sensor measures the
delivery temperature on the drivers side, directly on the delivery side of the heating system heat exchanger. On
the IHKA High, 2 sensors are installed as the delivery temperatures are measured separately at the heating
system heat exchanger for the drivers side and for the front-passenger side. The heating system heat exchanger
sensor is directly connected to the IHKA control unit.
Replacement value for the sensor: 55
°
C
-
Refrigerant pressure sensor (IHKR, IHKA only)
The refrigerant pressure sensor is located in the pressure line between the condenser and the evaporator.
Depending on the sensor signal, the output of the A/C compressor is reduced by the IHKR or IHKA control unit
in the event of excessively high refrigerant pressure.
The junction box provides power to the refrigerant pressure sensor. The data are evaluated in the junction box
electronics. The evaluated data are transmitted to the IHKR or IHKA control unit via the body CAN (K-CAN).
Actuators:
-
Electric auxiliary heater (only vehicles with diesel engine)
The electric auxiliary heater works on the principle of PTC (positive temperature coefficient) and is installed in
the heater/air conditioner. The electric auxiliary heater directly heats up the air for the vehicle interior.
[more ...]
-
Flap motors
The flap motors are controlled by the IHR/IHKR/IHKA control panel/control unit via the LIN bus.
> E81, E82, E87
•
IHR/IHKR
SBT Integrated heating control and air-conditioning system E70, E81, E82, E87, E90,
BMW AG - TIS
18.01.2013 18:47
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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