Fig. 601 Characteristic Resistance Values Of A Pt 2000 Overheating System In A; Overheating Sensor Component - Webasto Air Top Evo 3900 Workshop Manual

Function Tests

6.4.5 Overheating sensor component

See Fig. 903, Item 8
If you conduct this resistance test with a digital multimeter,
the overheating sensor must have the values shown in the
following diagram:
Overheating sensor
Contacts detached?
no
Cables damaged?
no
Connector damaged?
no
Resistance outside
2 - 2.5 kohms?
no
1
608
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Procedure
yes
2
Visual inspection
yes
2
Visual inspection
yes
Visual inspection
2
yes
Resistance
2
measurement
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Air Top Evo 3900/5500
Temperature in °C
Fig. 601 Characteristic resistance values of a PT 2000
overheating system in a temperature range of
10 °C to 30 °C
Testing and
measuring
equipment
Digital
multimeter
Visual