Removal, installation and testing of the in car temperature sensor with ventilation blower - ra83001400130x(0130)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Model 140 with automatic heater control

Operation No. of Job Texts and Work Units, Standard Texts and Flat Rates:

83-8060

Fig 1: Identifying Testing In-Car Temperature Sensor And Ventilation Blower Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Both dome lamps	Unclip.
2 screws (arrows)	Unscrew.
Dome lamp unit	Take off, disconnect 4-pole connector from B10/4 and unclip temperature sensor with ventilation blower.
Install	In the reverse sequence.
After completing the work: Erase fault memory in control unit (Diagnosis Manual - Climate Control).

TEST DATA

Sensor temperature in °C	Resistance in kΩ
+10	18.2 to 22.0
+15	14.3 to 17.2
+20	11.5 to 13.5
+25	9.1 to 10.2
+30	7.4 to 8.7
+35	6.0 to 7.0
+40	4.9 to 5.7
+45	4.0 to 4.7

CONVENTIONAL TESTER

Multimeter

e. g.

Sun, DMM-5