A6 Quattro Wagon V6-2.8L (AFC) (1995)
After each time the wire connection to a vehicle system has been disconnected:
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Re-enter -0- and -8- "AC/Heating Electronics" address word 08 in "Rapid data transfer" operating mode 1.
If control module identification and coding are now displayed:
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Check wiring to last control module disconnected for open/short circuits according to wiring diagram, repair as necessary.
If wiring checks OK:
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Replace control module last disconnected and reconnect all wire connections.
NOTE: If "Control module does not answer" is displayed, the wire connection to the A/C control head -E87- was also disconnected at some point.