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Audi Workshop Service and Repair Manuals

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Test step "5” > < Test step "3”

A4 Cabriolet Mk2

Test step “4”
Test step “4”
Heater overheating fuse -S24-
   
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, resistance measurement (0...100 Ω)
Test stepConnection to connector “C” → ChapterChecking of
l  Test conditions
–  Additional operations
SpecificationMeasures to be taken if reading does not match specification
4.1Contact “2” and contact “1”Heater overheating fuse -S24- and corresponding connections to auxiliary heater control unit -J364- 
–  Less than 1 Ω (ohm)
–  Use current flow diagram to check and repair connection to heater overheating fuse -S24-
–  Replace heater overheating fuse -S24- → Chapter
4.2Contact 2
and
contact 10		Heater overheating fuse -S24- and corresponding connections to auxiliary heater control unit -J364- 
–  ∞ Ω (infinity ohms)
–  Use current flow diagram to locate and eliminate open circuit or short circuit.
–  Replace heater overheating fuse -S24- → Chapter

  Note
t  The heater overheating fuse -S24- opens at temperatures in excess of approx. 110 °C and closes again at less than approx. 105 °C.
t  Resistances of less than 20 Ω can no longer be measured with the required accuracy using workshop equipment. The internal resistance test can therefore only be used to detect major component or wiring damage.
t  The heater overheating fuse -S24- is attached to the auxiliary heater housing → Chapter.
   

Test step "5” > < Test step "3”