600SEL (140.057) V12-6.0L (120.980) (1993)
Cabin Temperature Sensor / Switch: Description and Operation
In-Car Temperature Sensor
PURPOSE:
The in-Car temperature sensor (B10/4), sends interior temperature information to the push-button control unit.
CONSTRUCTION:
The in-car temperature sensor is a negative temperature coefficient (NTC) type resistor. As the surrounding temperature increases the resistance
decreases.
OPERATION:
When the ignition is switched "ON", a blower aspirator pulls interior air across the surface of the sensor element. The passing air produces a
resistance value in the sensor. The resulting current flow in the sensor circuit is recognized by the ACC control unit as a measurement of the
interior air temperature. The constant air flow past the sensor, produced by the blower aspirator, increases the accuracy of the ACC system.
In-Car Temperature Sensor (B10/4)
In-Car Temperature Sensor (B10/4) With Aspirator Blower
LOCATION:
The in-car temperature sensor is located in the overhead dome lamp assembly.