Function Selector Switch, Checking

A - function selector switch B - RESET button

^ select all computer functions in sequence by pressing upper or lower part of function selector switch A

If functions cannot be selected,
^ remove instrument cluster and disconnect connectors
^ connect adaptor harness VAG 1598/13 to 10-point instrument cluster connector (black)
^ set digital multimeter Fluke 83 (US 1119) to Ohm range
^ connect adaptor harness VAG 1598/13 to Test box
^ connect multimeter between sockets 1 and 3 of Test box VAG 1598
^ must be infinite Ohms (no continuity)

^ press RESET button B
^ must be 0 Ohms (continuity)

^ connect multimeter between sockets 1 and 4 of Test box VAG 1598
^ must be infinite Ohms (no continuity)
^ press upper function selector switch
^ must be 0 Ohms (continuity)

^ connect multimeter between sockets 1 and 2 of Test box VAG 1598
^ must be infinite Ohms (no continuity)

^ press lower function selector switch
^ must be 0 Ohms (continuity)

If one of the specified values is NOT obtained,
^ check wiring for open circuit according to wiring diagram, repair as necessary or
^ replace function selector switch