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Test step "2” > < List of electrical checks to be performed at connector A (to vehicle electrical system)

A4 Cabriolet Mk2

Test step “1”
Test step “1”
Power supply and earth connection
   
Vehicle diagnostic, testing and information system -VAS 5051A-, measurement mode: Multimeter, voltage measurement (20 VDC)
Test stepConnection to connector “A” → ChapterChecking of
l  Test conditions
–  Additional operations
SpecificationMeasures to be taken if reading does not match specification
1.1Contact “5”
and
contact “10”		Terminal “30” and earth connection at auxiliary heater control unit -J364-
l  Ignition off
–  approx. battery voltage
–  Use current flow diagram to check and repair power supply and earth connection
1.2Contact “9” and
contact “4”		Terminal “30” and earth connection at auxiliary heater control unit -J364-
l  Ignition off
–  approx. battery voltage
–  Use current flow diagram to check and repair power supply and earth connection

  Note
t  Test step “1.1” checks the power supply connection for the auxiliary heater control unit -J364-.
t  Test step “1.2” checks the battery voltage measurement connection for the auxiliary heater control unit -J364-.
t  After deactivating the bus system, the no-load current input of the auxiliary heater control unit -J364- is in the less than 1 mA range (as long as the bus system is active, the no-load current input is approx. 40 mA).
   

Test step "2” > < List of electrical checks to be performed at connector A (to vehicle electrical system)