Air-conditioning
Signal utilisation
The control unit calculates a value from the
signals provided by the two sensors.
Effects of signal failure
In the event of signal failure, the control unit
calculates a substitute value on the basis of the
outside temperature.
With this sender, the temperature-dependent
resistor is glued and soldered to the surface of a
printed circuit board. By designing the sender in
this way, the temperature is not determined at a
measuring point, but along a measuring section.
The central air outlet temperature is measured in
this way.
Central outlet temperature sender G191
Self-diagnosis fault message
Open circuit/short circuit to positive.
Short circuit to earth.
NTC resistor
PCB
SSP 192/033
Footwell outlet temperature sender G192
The temperature is measured by a temperature-
dependent resistor.
As temperature decreases, the electrical
resistance increases.
The temperature of the air streaming into the vehicle is now measured by two separate
temperature sensors.
NTC resistor
SSP 192/032
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